opengl/create_scene.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2015-2016 Mario Luzeiro <[email protected]>
 * Copyright (C) 2023 CERN
 * Copyright The KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
#include "render_3d_opengl.h"
#include "../../3d_canvas/eda_3d_canvas.h"
#include "../3d_placeholder_utils.h"
#include <3d_viewer_id.h>
#include <board.h>
#include <footprint.h>
#include <pcb_3d_body.h>
#include <pcb_track.h>
#include "convert_basic_shapes_to_polygon.h"
#include <lset.h>
#include <core/profile.h>        // To use GetRunningMicroSecs or another profiling utility
#include <geometry/shape_poly_set.h>
#include <thread_pool.h>
 
 
void RENDER_3D_OPENGL::addObjectTriangles( const FILLED_CIRCLE_2D*                aCircle,
                                           std::shared_ptr<TRIANGLE_DISPLAY_LIST> aDstLayer, float aZtop, float aZbot )
{
    const SFVEC2F& center = aCircle->GetCenter();
    const float radius = aCircle->GetRadius() * 2.0f; // Double because the render triangle
 
    // This is a small adjustment to the circle texture
    const float texture_factor = ( 8.0f / (float) SIZE_OF_CIRCLE_TEXTURE ) + 1.0f;
    const float f = ( sqrtf( 2.0f ) / 2.0f ) * radius * texture_factor;
 
    // Top and Bot segments ends are just triangle semi-circles, so need to add it in duplicated.
    aDstLayer->m_layer_top_segment_ends->AddTriangle( SFVEC3F( center.x + f, center.y, aZtop ),
                                                      SFVEC3F( center.x - f, center.y, aZtop ),
                                                      SFVEC3F( center.x, center.y - f, aZtop ) );
 
    aDstLayer->m_layer_top_segment_ends->AddTriangle( SFVEC3F( center.x - f, center.y, aZtop ),
                                                      SFVEC3F( center.x + f, center.y, aZtop ),
                                                      SFVEC3F( center.x, center.y + f, aZtop ) );
 
    aDstLayer->m_layer_bot_segment_ends->AddTriangle( SFVEC3F( center.x - f, center.y, aZbot ),
                                                      SFVEC3F( center.x + f, center.y, aZbot ),
                                                      SFVEC3F( center.x, center.y - f, aZbot ) );
 
    aDstLayer->m_layer_bot_segment_ends->AddTriangle( SFVEC3F( center.x + f, center.y, aZbot ),
                                                      SFVEC3F( center.x - f, center.y, aZbot ),
                                                      SFVEC3F( center.x, center.y + f, aZbot ) );
}
 
 
void RENDER_3D_OPENGL::addObjectTriangles( const POLYGON_4PT_2D*                  aPoly,
                                           std::shared_ptr<TRIANGLE_DISPLAY_LIST> aDstLayer, float aZtop, float aZbot )
{
    const SFVEC2F& v0 = aPoly->GetV0();
    const SFVEC2F& v1 = aPoly->GetV1();
    const SFVEC2F& v2 = aPoly->GetV2();
    const SFVEC2F& v3 = aPoly->GetV3();
 
    addTopAndBottomTriangles( aDstLayer, v0, v2, v1, aZtop, aZbot );
    addTopAndBottomTriangles( aDstLayer, v2, v0, v3, aZtop, aZbot );
}
 
 
void RENDER_3D_OPENGL::generateRing( const SFVEC2F& aCenter, float aInnerRadius,
                                     float aOuterRadius, unsigned int aNr_sides_per_circle,
                                     std::vector< SFVEC2F >& aInnerContourResult,
                                     std::vector< SFVEC2F >& aOuterContourResult,
                                     bool aInvertOrder )
{
    aInnerContourResult.clear();
    aInnerContourResult.reserve( aNr_sides_per_circle + 2 );
 
    aOuterContourResult.clear();
    aOuterContourResult.reserve( aNr_sides_per_circle + 2 );
 
    const int delta = 3600 / aNr_sides_per_circle;
 
    for( int ii = 0; ii < 3600; ii += delta )
    {
        float angle = (float)( aInvertOrder ? ( 3600 - ii ) : ii )
                               * 2.0f * glm::pi<float>() / 3600.0f;
        const SFVEC2F rotatedDir = SFVEC2F( cos( angle ), sin( angle ) );
 
        aInnerContourResult.emplace_back( aCenter.x + rotatedDir.x * aInnerRadius,
                                          aCenter.y + rotatedDir.y * aInnerRadius );
 
        aOuterContourResult.emplace_back( aCenter.x + rotatedDir.x * aOuterRadius,
                                          aCenter.y + rotatedDir.y * aOuterRadius );
    }
 
    aInnerContourResult.push_back( aInnerContourResult[0] );
    aOuterContourResult.push_back( aOuterContourResult[0] );
 
    wxASSERT( aInnerContourResult.size() == aOuterContourResult.size() );
}
 
 
void RENDER_3D_OPENGL::addObjectTriangles( const RING_2D* aRing, std::shared_ptr<TRIANGLE_DISPLAY_LIST> aDstLayer,
                                           float aZtop, float aZbot )
{
    const SFVEC2F& center = aRing->GetCenter();
    const float inner = aRing->GetInnerRadius();
    const float outer = aRing->GetOuterRadius();
 
    std::vector< SFVEC2F > innerContour;
    std::vector< SFVEC2F > outerContour;
 
    generateRing( center, inner, outer, m_boardAdapter.GetCircleSegmentCount( outer * 2.0f ),
                  innerContour, outerContour, false );
 
    // This will add the top and bot quads that will form the approximated ring
    for( unsigned int i = 0; i < ( innerContour.size() - 1 ); ++i )
    {
        const SFVEC2F& vi0 = innerContour[i + 0];
        const SFVEC2F& vi1 = innerContour[i + 1];
        const SFVEC2F& vo0 = outerContour[i + 0];
        const SFVEC2F& vo1 = outerContour[i + 1];
 
        aDstLayer->m_layer_top_triangles->AddQuad( SFVEC3F( vi1.x, vi1.y, aZtop ),
                                                   SFVEC3F( vi0.x, vi0.y, aZtop ),
                                                   SFVEC3F( vo0.x, vo0.y, aZtop ),
                                                   SFVEC3F( vo1.x, vo1.y, aZtop ) );
 
        aDstLayer->m_layer_bot_triangles->AddQuad( SFVEC3F( vi1.x, vi1.y, aZbot ),
                                                   SFVEC3F( vo1.x, vo1.y, aZbot ),
                                                   SFVEC3F( vo0.x, vo0.y, aZbot ),
                                                   SFVEC3F( vi0.x, vi0.y, aZbot ) );
    }
}
 
 
void RENDER_3D_OPENGL::addObjectTriangles( const TRIANGLE_2D* aTri, std::shared_ptr<TRIANGLE_DISPLAY_LIST> aDstLayer,
                                           float aZtop, float aZbot )
{
    const SFVEC2F& v1 = aTri->GetP1();
    const SFVEC2F& v2 = aTri->GetP2();
    const SFVEC2F& v3 = aTri->GetP3();
 
    addTopAndBottomTriangles( aDstLayer, v1, v2, v3, aZtop, aZbot );
}
 
 
void RENDER_3D_OPENGL::addObjectTriangles( const ROUND_SEGMENT_2D*                aSeg,
                                           std::shared_ptr<TRIANGLE_DISPLAY_LIST> aDstLayer, float aZtop, float aZbot )
{
    const SFVEC2F& leftStart   = aSeg->GetLeftStar();
    const SFVEC2F& leftEnd     = aSeg->GetLeftEnd();
    const SFVEC2F& leftDir     = aSeg->GetLeftDir();
 
    const SFVEC2F& rightStart  = aSeg->GetRightStar();
    const SFVEC2F& rightEnd    = aSeg->GetRightEnd();
    const SFVEC2F& rightDir    = aSeg->GetRightDir();
    const float    radius      = aSeg->GetRadius();
 
    const SFVEC2F& start       = aSeg->GetStart();
    const SFVEC2F& end         = aSeg->GetEnd();
 
    const float texture_factor  = ( 12.0f / (float) SIZE_OF_CIRCLE_TEXTURE ) + 1.0f;
    const float texture_factorF = ( 6.0f / (float) SIZE_OF_CIRCLE_TEXTURE ) + 1.0f;
 
    const float radius_of_the_square   = sqrtf( aSeg->GetRadiusSquared() * 2.0f );
    const float radius_triangle_factor = ( radius_of_the_square - radius ) / radius;
 
    const SFVEC2F factorS = SFVEC2F( -rightDir.y * radius * radius_triangle_factor,
                                      rightDir.x * radius * radius_triangle_factor );
 
    const SFVEC2F factorE = SFVEC2F( -leftDir.y  * radius * radius_triangle_factor,
                                      leftDir.x  * radius * radius_triangle_factor );
 
    // Top end segment triangles (semi-circles)
    aDstLayer->m_layer_top_segment_ends->AddTriangle(
                SFVEC3F( rightEnd.x  + texture_factor * factorS.x,
                         rightEnd.y  + texture_factor * factorS.y,
                         aZtop ),
                SFVEC3F( leftStart.x + texture_factor * factorE.x,
                         leftStart.y + texture_factor * factorE.y,
                         aZtop ),
                SFVEC3F( start.x - texture_factorF * leftDir.x * radius * sqrtf( 2.0f ),
                         start.y - texture_factorF * leftDir.y * radius * sqrtf( 2.0f ),
                         aZtop ) );
 
    aDstLayer->m_layer_top_segment_ends->AddTriangle(
                SFVEC3F( leftEnd.x    + texture_factor * factorE.x,
                         leftEnd.y    + texture_factor * factorE.y, aZtop ),
                SFVEC3F( rightStart.x + texture_factor * factorS.x,
                         rightStart.y + texture_factor * factorS.y, aZtop ),
                SFVEC3F( end.x - texture_factorF * rightDir.x * radius * sqrtf( 2.0f ),
                         end.y - texture_factorF * rightDir.y * radius * sqrtf( 2.0f ),
                         aZtop ) );
 
    // Bot end segment triangles (semi-circles)
    aDstLayer->m_layer_bot_segment_ends->AddTriangle(
                SFVEC3F( leftStart.x + texture_factor * factorE.x,
                         leftStart.y + texture_factor * factorE.y,
                         aZbot ),
                SFVEC3F( rightEnd.x  + texture_factor * factorS.x,
                         rightEnd.y  + texture_factor * factorS.y,
                         aZbot ),
                SFVEC3F( start.x - texture_factorF * leftDir.x * radius * sqrtf( 2.0f ),
                         start.y - texture_factorF * leftDir.y * radius * sqrtf( 2.0f ),
                         aZbot ) );
 
    aDstLayer->m_layer_bot_segment_ends->AddTriangle(
                SFVEC3F( rightStart.x + texture_factor * factorS.x,
                         rightStart.y + texture_factor * factorS.y, aZbot ),
                SFVEC3F( leftEnd.x    + texture_factor * factorE.x,
                         leftEnd.y    + texture_factor * factorE.y, aZbot ),
                SFVEC3F( end.x - texture_factorF * rightDir.x * radius * sqrtf( 2.0f ),
                         end.y - texture_factorF * rightDir.y * radius * sqrtf( 2.0f ),
                         aZbot ) );
 
    // Segment top and bot planes
    aDstLayer->m_layer_top_triangles->AddQuad(
                SFVEC3F( rightEnd.x,   rightEnd.y,   aZtop ),
                SFVEC3F( rightStart.x, rightStart.y, aZtop ),
                SFVEC3F( leftEnd.x,    leftEnd.y,    aZtop ),
                SFVEC3F( leftStart.x,  leftStart.y,  aZtop ) );
 
    aDstLayer->m_layer_bot_triangles->AddQuad(
                SFVEC3F( rightEnd.x,   rightEnd.y,   aZbot ),
                SFVEC3F( leftStart.x,  leftStart.y,  aZbot ),
                SFVEC3F( leftEnd.x,    leftEnd.y,    aZbot ),
                SFVEC3F( rightStart.x, rightStart.y, aZbot ) );
}
 
 
std::shared_ptr<OPENGL_RENDER_LIST_DEFERRED> RENDER_3D_OPENGL::generateHoles( const LIST_OBJECT2D&  aListHolesObject2d,
                                                                              const SHAPE_POLY_SET& aPoly, float aZtop,
                                                                              float aZbot, bool aInvertFaces,
                                                                              const BVH_CONTAINER_2D* aThroughHoles )
{
    if( aListHolesObject2d.size() == 0 )
        return nullptr;
 
    auto layerTriangles = std::make_shared<TRIANGLE_DISPLAY_LIST>( aListHolesObject2d.size() * 2 );
 
    // Convert the list of objects(filled circles) to triangle layer structure
    for( const OBJECT_2D* object2d : aListHolesObject2d )
    {
        switch( object2d->GetObjectType() )
        {
        case OBJECT_2D_TYPE::FILLED_CIRCLE:
            addObjectTriangles( static_cast<const FILLED_CIRCLE_2D*>( object2d ), layerTriangles, aZtop, aZbot );
            break;
 
        case OBJECT_2D_TYPE::ROUNDSEG:
            addObjectTriangles( static_cast<const ROUND_SEGMENT_2D*>( object2d ), layerTriangles, aZtop, aZbot );
            break;
 
        default:
            wxFAIL_MSG( wxT( "RENDER_3D_OPENGL::generateHoles: Object type not implemented" ) );
            break;
        }
    }
 
    // Note: he can have a aListHolesObject2d with holes but without contours
    // eg: when there are only NPTH on the list and the contours were not added
    if( aPoly.OutlineCount() > 0 )
    {
        layerTriangles->AddToMiddleContours( aPoly, aZbot, aZtop, m_boardAdapter.BiuTo3dUnits(), aInvertFaces,
                                             aThroughHoles );
    }
 
    return std::make_shared<OPENGL_RENDER_LIST_DEFERRED>( layerTriangles, m_circleTexture, aZbot, aZtop );
}
 
 
std::shared_ptr<OPENGL_RENDER_LIST_DEFERRED>
RENDER_3D_OPENGL::generateLayerList( const BVH_CONTAINER_2D* aContainer, const SHAPE_POLY_SET* aPolyList,
                                     PCB_LAYER_ID aLayer, const BVH_CONTAINER_2D* aThroughHoles )
{
    if( aContainer == nullptr )
        return nullptr;
 
    const LIST_OBJECT2D& listObject2d = aContainer->GetList();
 
    if( listObject2d.size() == 0 )
        return nullptr;
 
    float zBot = 0.0f;
    float zTop = 0.0f;
 
    getLayerZPos( aLayer, zTop, zBot );
 
    // Calculate an estimation for the nr of triangles based on the nr of objects
    unsigned int nrTrianglesEstimation = listObject2d.size() * 8;
 
    auto layerTriangles = std::make_shared<TRIANGLE_DISPLAY_LIST>( nrTrianglesEstimation );
 
    // store in a list so it will be latter deleted
    appendRenderTriangleList( layerTriangles );
 
    // Load the 2D (X,Y axis) component of shapes
    for( const OBJECT_2D* object2d : listObject2d )
    {
        switch( object2d->GetObjectType() )
        {
        case OBJECT_2D_TYPE::FILLED_CIRCLE:
            addObjectTriangles( static_cast<const FILLED_CIRCLE_2D*>( object2d ), layerTriangles, zTop, zBot );
            break;
 
        case OBJECT_2D_TYPE::POLYGON4PT:
            addObjectTriangles( static_cast<const POLYGON_4PT_2D*>( object2d ), layerTriangles, zTop, zBot );
            break;
 
        case OBJECT_2D_TYPE::RING:
            addObjectTriangles( static_cast<const RING_2D*>( object2d ), layerTriangles, zTop, zBot );
            break;
 
        case OBJECT_2D_TYPE::TRIANGLE:
            addObjectTriangles( static_cast<const TRIANGLE_2D*>( object2d ), layerTriangles, zTop, zBot );
            break;
 
        case OBJECT_2D_TYPE::ROUNDSEG:
            addObjectTriangles( static_cast<const ROUND_SEGMENT_2D*>( object2d ), layerTriangles, zTop, zBot );
            break;
 
        default:
            wxFAIL_MSG( wxT( "RENDER_3D_OPENGL: Object type is not implemented" ) );
            break;
        }
    }
 
    if( aPolyList && aPolyList->OutlineCount() > 0 )
    {
        layerTriangles->AddToMiddleContours( *aPolyList, zBot, zTop, m_boardAdapter.BiuTo3dUnits(), false,
                                             aThroughHoles );
    }
 
    // Create display list
    return std::make_shared<OPENGL_RENDER_LIST_DEFERRED>( layerTriangles, m_circleTexture, zBot, zTop );
}
 
 
std::shared_ptr<OPENGL_RENDER_LIST_DEFERRED> RENDER_3D_OPENGL::generateEmptyLayerList( PCB_LAYER_ID aLayer )
{
    float layer_z_bot = 0.0f;
    float layer_z_top = 0.0f;
 
    getLayerZPos( aLayer, layer_z_top, layer_z_bot );
 
    auto layerTriangles = std::make_shared<TRIANGLE_DISPLAY_LIST>( 1 );
 
    // store in a list so it will be latter deleted
    appendRenderTriangleList( layerTriangles );
 
    return std::make_shared<OPENGL_RENDER_LIST_DEFERRED>( layerTriangles, m_circleTexture, layer_z_bot, layer_z_top );
}
 
 
std::shared_ptr<OPENGL_RENDER_LIST_DEFERRED> RENDER_3D_OPENGL::createBoard( const SHAPE_POLY_SET&   aBoardPoly,
                                                                            const BVH_CONTAINER_2D* aThroughHoles,
                                                                            bool                    aTransparent )
{
    std::shared_ptr<OPENGL_RENDER_LIST_DEFERRED> dispLists;
    CONTAINER_2D                                 boardContainer;
 
    ConvertPolygonToTriangles( aBoardPoly, boardContainer, m_boardAdapter.BiuTo3dUnits(),
                               (const BOARD_ITEM &)*m_boardAdapter.GetBoard() );
 
    const LIST_OBJECT2D& listBoardObject2d = boardContainer.GetList();
 
    if( listBoardObject2d.size() > 0 )
    {
        // We will set a unitary Z so it will in future used with transformations since the
        // board poly will be used not only to draw itself but also the solder mask layers.
        const float layer_z_top = 1.0f;
        const float layer_z_bot = 0.0f;
 
        auto layerTriangles = std::make_shared<TRIANGLE_DISPLAY_LIST>( listBoardObject2d.size() );
 
        // Convert the list of objects(triangles) to triangle layer structure
        for( const OBJECT_2D* itemOnLayer : listBoardObject2d )
        {
            const OBJECT_2D* object2d_A = itemOnLayer;
 
            wxASSERT( object2d_A->GetObjectType() == OBJECT_2D_TYPE::TRIANGLE );
 
            const TRIANGLE_2D* tri = static_cast<const TRIANGLE_2D*>( object2d_A );
 
            const SFVEC2F& v1 = tri->GetP1();
            const SFVEC2F& v2 = tri->GetP2();
            const SFVEC2F& v3 = tri->GetP3();
 
            addTopAndBottomTriangles( layerTriangles, v1, v2, v3, layer_z_top, layer_z_bot );
        }
 
        if( aBoardPoly.OutlineCount() > 0 )
        {
            layerTriangles->AddToMiddleContours( aBoardPoly, layer_z_bot, layer_z_top,
                                                 m_boardAdapter.BiuTo3dUnits(), false,
                                                 aThroughHoles );
 
            dispLists = std::make_shared<OPENGL_RENDER_LIST_DEFERRED>( layerTriangles, m_circleTexture, layer_z_top,
                                                                       layer_z_top, aTransparent );
        }
    }
 
    return dispLists;
}
 
 
void RENDER_3D_OPENGL::backfillPostMachine()
{
    if( !m_boardAdapter.GetBoard() )
        return;
 
    const int copperLayerCount = m_boardAdapter.GetBoard()->GetCopperLayerCount();
    const float unitScale = m_boardAdapter.BiuTo3dUnits();
    const int platingThickness = m_boardAdapter.GetHolePlatingThickness();
    const float boardBodyThickness = m_boardAdapter.GetBoardBodyThickness();
 
    // We use the same unit z range as the board (0 to 1) and apply scaling when rendering
    const float boardZTop = 1.0f;  // Top of board body
    const float boardZBot = 0.0f;  // Bottom of board body
 
    // Helper to convert layer Z position to normalized 0-1 range
    auto normalizeZ = [&]( float absZ ) -> float
    {
        float boardTop = m_boardAdapter.GetLayerBottomZPos( F_Cu );
        float boardBot = m_boardAdapter.GetLayerBottomZPos( B_Cu );
        float boardThick = boardTop - boardBot;
 
        if( boardThick <= 0 )
            return 0.5f;
 
        // Map absolute Z to 0-1 range where 0 = B_Cu and 1 = F_Cu
        return ( absZ - boardBot ) / boardThick;
    };
 
    // We'll accumulate all plug geometry into a single triangle list
    std::shared_ptr<TRIANGLE_DISPLAY_LIST> plugTriangles = std::make_shared<TRIANGLE_DISPLAY_LIST>( 1024 );
 
    // Process vias for backdrill and post-machining plugs
    for( const PCB_TRACK* track : m_boardAdapter.GetBoard()->Tracks() )
    {
        if( track->Type() != PCB_VIA_T )
            continue;
 
        const PCB_VIA* via = static_cast<const PCB_VIA*>( track );
 
        const float holeDiameter = via->GetDrillValue() * unitScale;
        const float holeInnerRadius = holeDiameter / 2.0f;
        const float holeOuterRadius = holeInnerRadius + platingThickness * unitScale;
        const SFVEC2F center( via->GetStart().x * unitScale, -via->GetStart().y * unitScale );
        const int nrSegments = m_boardAdapter.GetCircleSegmentCount( via->GetDrillValue() );
 
        PCB_LAYER_ID topLayer, bottomLayer;
        via->LayerPair( &topLayer, &bottomLayer );
 
        float viaZTop, viaZBot, dummy;
        getLayerZPos( topLayer, viaZTop, dummy );
        getLayerZPos( bottomLayer, dummy, viaZBot );
 
        // Handle backdrill plugs
        const float secondaryDrillRadius = via->GetSecondaryDrillSize().value_or( 0 ) * 0.5f * unitScale;
        const float tertiaryDrillRadius = via->GetTertiaryDrillSize().value_or( 0 ) * 0.5f * unitScale;
 
        if( secondaryDrillRadius > holeOuterRadius || tertiaryDrillRadius > holeOuterRadius )
        {
            PCB_LAYER_ID plug_start_layer = F_Cu;
            PCB_LAYER_ID plug_end_layer = B_Cu;
 
            // Case 1: secondary drill exists, so we need to adjust the plug_end_layer
            if( secondaryDrillRadius > holeOuterRadius )
            {
                plug_end_layer = via->GetSecondaryDrillEndLayer();
            }
            // Case 2: tertiary drill exists, so we need to adjust the plug_start_layer
            if( tertiaryDrillRadius > holeOuterRadius )
            {
                plug_start_layer = via->GetTertiaryDrillStartLayer();
            }
 
            // Calculate where the backdrill ends and plug should start
            float plugZTop, plugZBot, temp;
            getLayerZPos( plug_end_layer, temp, plugZBot );
            getLayerZPos( plug_start_layer, plugZTop, temp );
 
            // Create a ring from holeOuterRadius to backdrillRadius
            generateCylinder( center, holeOuterRadius, std::max( secondaryDrillRadius, tertiaryDrillRadius ),
                                plugZTop, plugZBot, nrSegments, plugTriangles );
        }
 
        // Handle front post-machining plugs
        const auto frontMode = via->GetFrontPostMachining();
 
        if( frontMode.has_value()
            && frontMode.value() != PAD_DRILL_POST_MACHINING_MODE::NOT_POST_MACHINED
            && frontMode.value() != PAD_DRILL_POST_MACHINING_MODE::UNKNOWN )
        {
            const float frontRadius = via->GetFrontPostMachiningSize() * 0.5f * unitScale;
            const float frontDepth = via->GetFrontPostMachiningDepth() * unitScale;
 
            if( frontRadius > holeOuterRadius && frontDepth > 0 )
            {
                // Plug goes from bottom of post-machining to bottom of via
                float pmBottomZ = normalizeZ( viaZTop - frontDepth );
                float plugZBot = normalizeZ( viaZBot );
 
                if( pmBottomZ > plugZBot )
                {
                    if( frontMode.value() == PAD_DRILL_POST_MACHINING_MODE::COUNTERSINK )
                    {
                        EDA_ANGLE angle( via->GetFrontPostMachiningAngle(), TENTHS_OF_A_DEGREE_T );
                        generateInvCone( center, holeOuterRadius, frontRadius,
                                         pmBottomZ, plugZBot, nrSegments, plugTriangles, angle );
                    }
                    else
                    {
                        generateCylinder( center, holeOuterRadius, frontRadius,
                                          pmBottomZ, plugZBot, nrSegments, plugTriangles );
                    }
                }
            }
        }
 
        // Handle back post-machining plugs
        const auto backMode = via->GetBackPostMachining();
 
        if( backMode.has_value()
            && backMode.value() != PAD_DRILL_POST_MACHINING_MODE::NOT_POST_MACHINED
            && backMode.value() != PAD_DRILL_POST_MACHINING_MODE::UNKNOWN )
        {
            const float backRadius = via->GetBackPostMachiningSize() * 0.5f * unitScale;
            const float backDepth = via->GetBackPostMachiningDepth() * unitScale;
 
            if( backRadius > holeOuterRadius && backDepth > 0 )
            {
                // Plug goes from top of via to top of post-machining
                float plugZTop = normalizeZ( viaZTop );
                float pmTopZ = normalizeZ( viaZBot + backDepth );
 
                if( plugZTop > pmTopZ )
                {
                    if( backMode.value() == PAD_DRILL_POST_MACHINING_MODE::COUNTERSINK )
                    {
                        EDA_ANGLE angle( via->GetBackPostMachiningAngle(), TENTHS_OF_A_DEGREE_T );
                        generateInvCone( center, holeOuterRadius, backRadius,
                                         plugZTop, pmTopZ, nrSegments, plugTriangles, angle );
                    }
                    else
                    {
                        generateCylinder( center, holeOuterRadius, backRadius,
                                          plugZTop, pmTopZ, nrSegments, plugTriangles );
                    }
                }
            }
        }
    }
 
    // Process pads for post-machining plugs
    for( const FOOTPRINT* footprint : m_boardAdapter.GetBoard()->Footprints() )
    {
        for( const PAD* pad : footprint->Pads() )
        {
            if( !pad->HasHole() )
                continue;
 
            if( pad->GetDrillShape() != PAD_DRILL_SHAPE::CIRCLE )
                continue;
 
            const SFVEC2F padCenter( pad->GetPosition().x * unitScale,
                                     -pad->GetPosition().y * unitScale );
            const float holeInnerRadius = pad->GetDrillSize().x * 0.5f * unitScale;
            const float holeOuterRadius = holeInnerRadius + platingThickness * unitScale;
            const int nrSegments = m_boardAdapter.GetCircleSegmentCount( pad->GetDrillSize().x );
 
            float padZTop, padZBot, padDummy;
            getLayerZPos( F_Cu, padZTop, padDummy );
            getLayerZPos( B_Cu, padDummy, padZBot );
 
            // Handle front post-machining plugs for pads
            const auto frontMode = pad->GetFrontPostMachining();
 
            if( frontMode.has_value()
                && frontMode.value() != PAD_DRILL_POST_MACHINING_MODE::NOT_POST_MACHINED
                && frontMode.value() != PAD_DRILL_POST_MACHINING_MODE::UNKNOWN )
            {
                const float frontRadius = pad->GetFrontPostMachiningSize() * 0.5f * unitScale;
                const float frontDepth = pad->GetFrontPostMachiningDepth() * unitScale;
 
                if( frontRadius > holeOuterRadius && frontDepth > 0 )
                {
                    float pmBottomZ = normalizeZ( padZTop - frontDepth );
                    float plugZBot = normalizeZ( padZBot );
 
                    if( pmBottomZ > plugZBot )
                    {
                        if( frontMode.value() == PAD_DRILL_POST_MACHINING_MODE::COUNTERSINK )
                        {
                            EDA_ANGLE angle( pad->GetFrontPostMachiningAngle(), TENTHS_OF_A_DEGREE_T );
                            generateInvCone( padCenter, holeOuterRadius, frontRadius,
                                             pmBottomZ, plugZBot, nrSegments, plugTriangles, angle );
                        }
                        else
                        {
                            generateCylinder( padCenter, holeOuterRadius, frontRadius,
                                              pmBottomZ, plugZBot, nrSegments, plugTriangles );
                        }
                    }
                }
            }
 
            // Handle back post-machining plugs for pads
            const auto backMode = pad->GetBackPostMachining();
 
            if( backMode.has_value()
                && backMode.value() != PAD_DRILL_POST_MACHINING_MODE::NOT_POST_MACHINED
                && backMode.value() != PAD_DRILL_POST_MACHINING_MODE::UNKNOWN )
            {
                const float backRadius = pad->GetBackPostMachiningSize() * 0.5f * unitScale;
                const float backDepth = pad->GetBackPostMachiningDepth() * unitScale;
 
                if( backRadius > holeOuterRadius && backDepth > 0 )
                {
                    float plugZTop = normalizeZ( padZTop );
                    float pmTopZ = normalizeZ( padZBot + backDepth );
 
                    if( plugZTop > pmTopZ )
                    {
                        if( backMode.value() == PAD_DRILL_POST_MACHINING_MODE::COUNTERSINK )
                        {
                            EDA_ANGLE angle( pad->GetBackPostMachiningAngle(), TENTHS_OF_A_DEGREE_T );
                            generateInvCone( padCenter, holeOuterRadius, backRadius,
                                             plugZTop, pmTopZ, nrSegments, plugTriangles, angle );
                        }
                        else
                        {
                            generateCylinder( padCenter, holeOuterRadius, backRadius,
                                              plugZTop, pmTopZ, nrSegments, plugTriangles );
                        }
                    }
                }
            }
        }
    }
 
    // If we have any plug geometry, create a render list for it
    if( plugTriangles->m_layer_top_triangles->GetVertexSize() > 0
        || plugTriangles->m_layer_bot_triangles->GetVertexSize() > 0
        || plugTriangles->m_layer_middle_contours_quads->GetVertexSize() > 0 )
    {
        // Store the triangles for later cleanup
        appendRenderTriangleList( plugTriangles );
 
        // Create a render list for the plugs using the same Z range as the board
        // This will be scaled and drawn alongside m_boardWithHoles in renderBoardBody()
        assignRenderPtr( m_postMachinePlugs,
                         std::make_shared<OPENGL_RENDER_LIST_DEFERRED>( plugTriangles, m_circleTexture, boardZTop, boardZTop ) );
    }
}
 
 
void RENDER_3D_OPENGL::renderExtrudedBodies()
{
    if( !m_boardAdapter.GetBoard() )
        return;
 
    const float biuTo3d = m_boardAdapter.BiuTo3dUnits();
 
    for( FOOTPRINT* fp : m_boardAdapter.GetBoard()->Footprints() )
    {
        if( !fp->HasBody() )
            continue;
 
        const EXTRUDED_3D_BODY* body = fp->GetBody()->GetExtruded();
 
        if( !body->m_show || !m_boardAdapter.IsFootprintShown( fp ) )
            continue;
 
        SHAPE_POLY_SET outline;
 
        if( !GetExtrusionOutline( fp, outline ) )
            continue;
 
        if( outline.OutlineCount() == 0 )
            continue;
 
        outline.Simplify();
 
        VECTOR2I fpPos = fp->GetPosition();
        ApplyExtrusionTransform( outline, body, fpPos );
 
        bool  isBack = fp->IsFlipped();
        float boardSurfaceZ = m_boardAdapter.GetFootprintZPos( isBack );
        float standoff3d = body->m_standoff * biuTo3d;
        float bodyThickness = ( body->m_height - body->m_standoff ) * biuTo3d * body->m_scale.z;
        float zOffset3d = pcbIUScale.mmToIU( body->m_offset.z ) * biuTo3d;
 
        float zBot, zTop;
 
        if( !isBack )
        {
            zBot = boardSurfaceZ + standoff3d + zOffset3d;
            zTop = zBot + bodyThickness;
        }
        else
        {
            zTop = boardSurfaceZ - standoff3d - zOffset3d;
            zBot = zTop - bodyThickness;
        }
 
        CONTAINER_2D triContainer;
        ConvertPolygonToTriangles( outline, triContainer, biuTo3d, *fp );
 
        const LIST_OBJECT2D& triList = triContainer.GetList();
 
        if( triList.empty() )
            continue;
 
        std::shared_ptr<TRIANGLE_DISPLAY_LIST> layerTri = std::make_shared<TRIANGLE_DISPLAY_LIST>( triList.size() );
 
        for( const OBJECT_2D* obj : triList )
        {
            const TRIANGLE_2D* tri = static_cast<const TRIANGLE_2D*>( obj );
            addTopAndBottomTriangles( layerTri, tri->GetP1(), tri->GetP2(), tri->GetP3(), zTop, zBot );
        }
 
        layerTri->AddToMiddleContours( outline, zBot, zTop, biuTo3d, false );
 
        std::shared_ptr<OPENGL_RENDER_LIST_DEFERRED> renderList =
                std::make_shared<OPENGL_RENDER_LIST_DEFERRED>( layerTri, m_circleTexture, zTop, zBot );
 
        appendRenderTriangleList( layerTri );
        assignRenderMap( m_extrudedBodyLists, fp, renderList );
 
        // Create pin extrusions for pad holes
        // The pins move with the body, so the Z offset shifts them whole
        if( standoff3d > 0.0f )
        {
            SHAPE_POLY_SET pinPoly;
            SHAPE_POLY_SET pegPoly;
 
            if( GetExtrusionPinOutlines( fp, pinPoly, pegPoly ) )
            {
                float oppositeSurfaceZ = m_boardAdapter.GetFootprintZPos( !isBack );
                float protrusion = 1.0f * pcbIUScale.IU_PER_MM * biuTo3d;
                float pinZBot, pinZTop;
 
                if( !isBack )
                {
                    pinZBot = oppositeSurfaceZ - protrusion + zOffset3d;
                    pinZTop = boardSurfaceZ + standoff3d + zOffset3d;
                }
                else
                {
                    pinZTop = oppositeSurfaceZ + protrusion - zOffset3d;
                    pinZBot = boardSurfaceZ - standoff3d - zOffset3d;
                }
 
                auto buildPinList = [&]( SHAPE_POLY_SET& aPoly, auto& aDstMap )
                {
                    if( aPoly.OutlineCount() == 0 )
                        return;
 
                    ApplyExtrusionTransform( aPoly, body, fpPos );
 
                    CONTAINER_2D pinTriContainer;
                    ConvertPolygonToTriangles( aPoly, pinTriContainer, biuTo3d, *fp );
 
                    const LIST_OBJECT2D& pinTriList = pinTriContainer.GetList();
 
                    if( pinTriList.empty() )
                        return;
 
                    auto pinLayerTri = std::make_shared<TRIANGLE_DISPLAY_LIST>( pinTriList.size() );
 
                    for( const OBJECT_2D* obj : pinTriList )
                    {
                        const TRIANGLE_2D* tri = static_cast<const TRIANGLE_2D*>( obj );
                        addTopAndBottomTriangles( pinLayerTri, tri->GetP1(), tri->GetP2(), tri->GetP3(), pinZTop,
                                                  pinZBot );
                    }
 
                    pinLayerTri->AddToMiddleContours( aPoly, pinZBot, pinZTop, biuTo3d, false );
 
                    std::shared_ptr<OPENGL_RENDER_LIST_DEFERRED> pinRenderList =
                            std::make_shared<OPENGL_RENDER_LIST_DEFERRED>( pinLayerTri, m_circleTexture, pinZTop,
                                                                           pinZBot );
 
                    appendRenderTriangleList( pinLayerTri );
                    assignRenderMap( aDstMap, fp, pinRenderList );
                };
 
                buildPinList( pinPoly, m_extrudedPadLists );
                buildPinList( pegPoly, m_extrudedPegLists );
            }
        }
    }
}
 
 
void RENDER_3D_OPENGL::reload()
{
    m_reloadRequested = false;
 
    // Ensure previous reload worker is finished before freeing/rebuilding render data.
    StopBgWorker();
 
    // Drop hover BVH before layers are destroyed; LAYER_ITEM points into those OBJECT_2Ds.
    if( m_canvas )
        m_canvas->InvalidateRaytracingHitTesting();
 
    freeAllLists();
 
    if( !m_boardAdapter.m_IsPreviewer )
        createPlaceholderModel();
 
    OBJECT_2D_STATS::Instance().ResetStats();
 
    m_boardAdapter.InitSettings( m_activityReporter, m_warningReporter );
 
    SFVEC3F camera_pos = m_boardAdapter.GetBoardCenter();
    m_camera.SetBoardLookAtPos( camera_pos );
 
    // Create basic Board without holes
    assignRenderPtr( m_board, createBoard( m_boardAdapter.GetBoardPoly(), nullptr ) );
 
    startBgWorker();
}
 
 
void RENDER_3D_OPENGL::sendRefreshView()
{
    if( m_canvas )
        wxQueueEvent( m_canvas, new wxCommandEvent( wxEVT_REFRESH_CUSTOM_COMMAND, ID_CUSTOM_EVENT_1 ) );
}
 
 
void RENDER_3D_OPENGL::bgWorker( std::stop_token aStop )
{
    int64_t stats_startReloadTime = GetRunningMicroSecs();
 
    if( aStop.stop_requested() )
        return;
 
    // Ensure hover BVH is gone before destroyLayers() inside CreateLayers.
    if( m_canvas )
        m_canvas->InvalidateRaytracingHitTesting();
 
    m_boardAdapter.CreateLayers( m_activityReporter, aStop );
 
    if( aStop.stop_requested() )
        return;
 
    sendRefreshView();
 
    if( m_activityReporter )
        m_activityReporter->Report( _( "Load OpenGL: board" ) );
 
    // Create Board with TH
    assignRenderPtr( m_board, createBoard( m_boardAdapter.GetBoardPoly(), &m_boardAdapter.GetTH_IDs() ) );
 
    if( aStop.stop_requested() )
        return;
 
    sendRefreshView();
 
    m_antiBoardPolys.RemoveAllContours();
    m_antiBoardPolys.NewOutline();
    m_antiBoardPolys.Append( VECTOR2I( -INT_MAX/2, -INT_MAX/2 ) );
    m_antiBoardPolys.Append( VECTOR2I(  INT_MAX/2, -INT_MAX/2 ) );
    m_antiBoardPolys.Append( VECTOR2I(  INT_MAX/2,  INT_MAX/2 ) );
    m_antiBoardPolys.Append( VECTOR2I( -INT_MAX/2,  INT_MAX/2 ) );
    m_antiBoardPolys.Outline( 0 ).SetClosed( true );
 
    m_antiBoardPolys.BooleanSubtract( m_boardAdapter.GetBoardPoly() );
 
    assignRenderPtr( m_antiBoard, createBoard( m_antiBoardPolys, nullptr, true ) );
 
    if( aStop.stop_requested() )
        return;
 
    SHAPE_POLY_SET board_poly_with_holes = m_boardAdapter.GetBoardPoly().CloneDropTriangulation();
    board_poly_with_holes.BooleanSubtract( m_boardAdapter.GetTH_ODPolys() );
    board_poly_with_holes.BooleanSubtract( m_boardAdapter.GetNPTH_ODPolys() );
 
    // Also subtract counterbore, countersink, and backdrill polygons from the board
    if( m_boardAdapter.GetFrontCounterborePolys().OutlineCount() > 0 )
        board_poly_with_holes.BooleanSubtract( m_boardAdapter.GetFrontCounterborePolys() );
 
    if( m_boardAdapter.GetBackCounterborePolys().OutlineCount() > 0 )
        board_poly_with_holes.BooleanSubtract( m_boardAdapter.GetBackCounterborePolys() );
 
    if( m_boardAdapter.GetFrontCountersinkPolys().OutlineCount() > 0 )
        board_poly_with_holes.BooleanSubtract( m_boardAdapter.GetFrontCountersinkPolys() );
 
    if( m_boardAdapter.GetBackCountersinkPolys().OutlineCount() > 0 )
        board_poly_with_holes.BooleanSubtract( m_boardAdapter.GetBackCountersinkPolys() );
 
    if( m_boardAdapter.GetSecondarydrillPolys().OutlineCount() > 0 )
        board_poly_with_holes.BooleanSubtract( m_boardAdapter.GetSecondarydrillPolys() );
 
    if( m_boardAdapter.GetTertiarydrillPolys().OutlineCount() > 0 )
        board_poly_with_holes.BooleanSubtract( m_boardAdapter.GetTertiarydrillPolys() );
 
    if( aStop.stop_requested() )
        return;
 
    assignRenderPtr( m_boardWithHoles, createBoard( board_poly_with_holes, &m_boardAdapter.GetTH_IDs() ) );
 
    // Create plugs for backdrilled and post-machined areas
    backfillPostMachine();
 
    if( aStop.stop_requested() )
        return;
 
    sendRefreshView();
 
    // Create Through Holes and vias
    if( m_activityReporter )
        m_activityReporter->Report( _( "Load OpenGL: holes and vias" ) );
 
    SHAPE_POLY_SET outerPolyTHT = m_boardAdapter.GetTH_ODPolys().CloneDropTriangulation();
 
    // Include NPTH polygons so their barrel walls are also generated
    if( m_boardAdapter.GetNPTH_ODPolys().OutlineCount() > 0 )
        outerPolyTHT.BooleanAdd( m_boardAdapter.GetNPTH_ODPolys() );
 
    outerPolyTHT.BooleanIntersection( m_boardAdapter.GetBoardPoly() );
 
    assignRenderPtr( m_outerThroughHoles, generateHoles( m_boardAdapter.GetTH_ODs().GetList(), outerPolyTHT, 1.0f, 0.0f,
                                                         false, &m_boardAdapter.GetTH_IDs() ) );
 
    assignRenderPtr( m_outerViaThroughHoles, generateHoles( m_boardAdapter.GetViaTH_ODs().GetList(),
                                                             m_boardAdapter.GetViaTH_ODPolys(), 1.0f, 0.0f, false ) );
 
    if( m_boardAdapter.m_Cfg->m_Render.clip_silk_on_via_annuli )
    {
        assignRenderPtr( m_outerThroughHoleRings, generateHoles( m_boardAdapter.GetViaAnnuli().GetList(),
                                                                  m_boardAdapter.GetViaAnnuliPolys(), 1.0f, 0.0f, false ) );
    }
 
    const MAP_POLY& innerMapHoles = m_boardAdapter.GetHoleIdPolysMap();
    const MAP_POLY& outerMapHoles = m_boardAdapter.GetHoleOdPolysMap();
 
    wxASSERT( innerMapHoles.size() == outerMapHoles.size() );
 
    const MAP_CONTAINER_2D_BASE& map_holes = m_boardAdapter.GetLayerHoleMap();
 
    if( outerMapHoles.size() > 0 )
    {
        float layer_z_bot = 0.0f;
        float layer_z_top = 0.0f;
 
        for( const auto& [ layer, poly ] : outerMapHoles )
        {
            getLayerZPos( layer, layer_z_top, layer_z_bot );
 
            assignRenderMap( m_outerLayerHoles, layer,
                             generateHoles( map_holes.at( layer )->GetList(), *poly, layer_z_top, layer_z_bot, false ) );
        }
 
        for( const auto& [ layer, poly ] : innerMapHoles )
        {
            getLayerZPos( layer, layer_z_top, layer_z_bot );
 
            assignRenderMap( m_innerLayerHoles, layer,
                             generateHoles( map_holes.at( layer )->GetList(), *poly, layer_z_top, layer_z_bot, false ) );
        }
    }
 
    // Generate vertical cylinders of vias and pads (copper)
    generateViasAndPads();
 
    if( aStop.stop_requested() )
        return;
 
    sendRefreshView();
 
    // Add layers maps
    if( m_activityReporter )
        m_activityReporter->Report( _( "Load OpenGL: layers" ) );
 
    std::bitset<LAYER_3D_END> visibilityFlags = m_boardAdapter.GetVisibleLayers();
    const MAP_POLY&           map_poly = m_boardAdapter.GetPolyMap();
    wxString                  msg;
 
    for( const auto& [ layer, container2d ] : m_boardAdapter.GetLayerMap() )
    {
        if( !m_boardAdapter.Is3dLayerEnabled( layer, visibilityFlags ) )
            continue;
 
        if( m_activityReporter )
        {
            msg = m_boardAdapter.GetBoard()->GetLayerName( layer );
            m_activityReporter->Report( wxString::Format( _( "Load OpenGL layer %s" ), msg ) );
        }
 
        SHAPE_POLY_SET polyListSubtracted;
        SHAPE_POLY_SET* polyList = nullptr;
 
        // Load the vertical (Z axis) component of shapes
 
        if( m_boardAdapter.m_Cfg->m_Render.opengl_copper_thickness )
        {
            if( map_poly.contains( layer ) )
            {
                polyListSubtracted = *map_poly.at( layer );
 
                if( LSET::PhysicalLayersMask().test( layer ) )
                {
                    polyListSubtracted.BooleanIntersection( m_boardAdapter.GetBoardPoly() );
                }
 
                if( layer != B_Mask && layer != F_Mask )
                {
                    polyListSubtracted.BooleanSubtract( m_boardAdapter.GetTH_ODPolys() );
                    polyListSubtracted.BooleanSubtract( m_boardAdapter.GetNPTH_ODPolys() );
 
                    // Subtract counterbore/countersink cutouts from copper layers
                    if( layer == F_Cu )
                    {
                        polyListSubtracted.BooleanSubtract( m_boardAdapter.GetFrontCounterborePolys() );
                        polyListSubtracted.BooleanSubtract( m_boardAdapter.GetFrontCountersinkPolys() );
                    }
                    else if( layer == B_Cu )
                    {
                        polyListSubtracted.BooleanSubtract( m_boardAdapter.GetBackCounterborePolys() );
                        polyListSubtracted.BooleanSubtract( m_boardAdapter.GetBackCountersinkPolys() );
                    }
                }
 
                if( m_boardAdapter.m_Cfg->m_Render.subtract_mask_from_silk )
                {
                    if( layer == B_SilkS && map_poly.contains( B_Mask ) )
                    {
                        polyListSubtracted.BooleanSubtract( *map_poly.at( B_Mask ) );
                    }
                    else if( layer == F_SilkS && map_poly.contains( F_Mask ) )
                    {
                        polyListSubtracted.BooleanSubtract( *map_poly.at( F_Mask ) );
                    }
                }
 
                polyList = &polyListSubtracted;
            }
        }
 
        if( aStop.stop_requested() )
            return;
 
        std::shared_ptr<OPENGL_RENDER_LIST_DEFERRED> oglList =
                generateLayerList( container2d, polyList, layer, &m_boardAdapter.GetTH_IDs() );
 
        if( oglList != nullptr )
            assignRenderMap( m_layers, layer, oglList );
 
        if( aStop.stop_requested() )
            return;
 
        sendRefreshView();
    }
 
    if( m_boardAdapter.m_Cfg->m_Render.DifferentiatePlatedCopper() )
    {
        const SHAPE_POLY_SET* frontPlatedCopperPolys = m_boardAdapter.GetFrontPlatedCopperPolys();
        const SHAPE_POLY_SET* backPlatedCopperPolys = m_boardAdapter.GetBackPlatedCopperPolys();
 
        if( frontPlatedCopperPolys )
        {
            SHAPE_POLY_SET poly = frontPlatedCopperPolys->CloneDropTriangulation();
            poly.BooleanIntersection( m_boardAdapter.GetBoardPoly() );
            poly.BooleanSubtract( m_boardAdapter.GetTH_ODPolys() );
            poly.BooleanSubtract( m_boardAdapter.GetNPTH_ODPolys() );
            poly.BooleanSubtract( m_boardAdapter.GetFrontCounterborePolys() );
            poly.BooleanSubtract( m_boardAdapter.GetFrontCountersinkPolys() );
            poly.BooleanSubtract( m_boardAdapter.GetSecondarydrillPolys() );
 
            assignRenderPtr( m_platedPadsFront, generateLayerList( m_boardAdapter.GetPlatedPadsFront(), &poly, F_Cu ) );
 
            // An entry for F_Cu must exist in m_layers or we'll never look at m_platedPadsFront
            if( m_layers.count( F_Cu ) == 0 )
                assignRenderMap( m_layers, F_Cu, generateEmptyLayerList( F_Cu ) );
        }
 
        if( backPlatedCopperPolys )
        {
            SHAPE_POLY_SET poly = backPlatedCopperPolys->CloneDropTriangulation();
            poly.BooleanIntersection( m_boardAdapter.GetBoardPoly() );
            poly.BooleanSubtract( m_boardAdapter.GetTH_ODPolys() );
            poly.BooleanSubtract( m_boardAdapter.GetNPTH_ODPolys() );
            poly.BooleanSubtract( m_boardAdapter.GetBackCounterborePolys() );
            poly.BooleanSubtract( m_boardAdapter.GetBackCountersinkPolys() );
            poly.BooleanSubtract( m_boardAdapter.GetTertiarydrillPolys() );
 
            assignRenderPtr( m_platedPadsBack, generateLayerList( m_boardAdapter.GetPlatedPadsBack(), &poly, B_Cu ) );
 
            // An entry for B_Cu must exist in m_layers or we'll never look at m_platedPadsBack
            if( m_layers.count( B_Cu ) == 0 )
                assignRenderMap( m_layers, B_Cu, generateEmptyLayerList( B_Cu ) );
        }
    }
 
    if( m_boardAdapter.m_Cfg->m_Render.show_off_board_silk )
    {
        if( const BVH_CONTAINER_2D* padsFront = m_boardAdapter.GetOffboardPadsFront() )
            assignRenderPtr( m_offboardPadsFront, generateLayerList( padsFront, nullptr, F_Cu ) );
 
        if( const BVH_CONTAINER_2D* padsBack = m_boardAdapter.GetOffboardPadsBack() )
            assignRenderPtr( m_offboardPadsBack, generateLayerList( padsBack, nullptr, B_Cu ) );
    }
 
    if( aStop.stop_requested() )
        return;
 
    sendRefreshView();
 
    // Load 3D models
    if( m_activityReporter )
        m_activityReporter->Report( _( "Loading 3D models..." ) );
 
    load3dModels( aStop );
 
    renderExtrudedBodies();
 
    if( aStop.stop_requested() )
        return;
 
    sendRefreshView();
 
    // OpenGL draws the board on the GPU, but hover/picking still uses the auxiliary
    // raytracing renderer (IntersectBoardItem). That path keeps its own BVH
    // (m_accelerator), which is not updated by the OpenGL scene build above.
    // Rebuild it here on the same worker thread once board layers are ready.
    if( !aStop.stop_requested() && m_canvas )
    {
        m_hitTestDirty = true;
        runHitTestRebuild( aStop );
    }
 
    if( aStop.stop_requested() )
        return;
 
    if( m_activityReporter )
    {
        // Calculation time in seconds
        double calculation_time = (double)( GetRunningMicroSecs() - stats_startReloadTime) / 1e6;
 
        m_activityReporter->Report( wxString::Format( _( "Load completed in %.3f s" ), calculation_time ) );
    }
}
 
 
void RENDER_3D_OPENGL::startBgWorker()
{
    wxLogTrace( m_logTrace, wxT( "RENDER_3D_OPENGL::startBgWorker" ) );
 
    // Claim the flag before the thread runs so a rebuild cannot displace the load.
    m_bgWorkerBusy = true;
 
    m_bgWorkerThread = std::jthread(
            [this]( std::stop_token aStopToken )
            {
                // Avoid lag in main (UI) thread
                BS::this_thread::set_os_thread_priority( BS::os_thread_priority::below_normal );
 
                bgWorker( aStopToken );
 
                m_bgWorkerBusy = false;
            } );
}
 
 
void RENDER_3D_OPENGL::RebuildHitTestAsync()
{
    m_hitTestDirty = true;
 
    // A running worker picks the request up before it releases the flag.
    if( m_bgWorkerBusy.exchange( true ) )
        return;
 
    m_bgWorkerThread = std::jthread(
            [this]( std::stop_token aStop )
            {
                BS::this_thread::set_os_thread_priority( BS::os_thread_priority::below_normal );
 
                runHitTestRebuild( aStop );
 
                m_bgWorkerBusy = false;
            } );
}
 
 
void RENDER_3D_OPENGL::runHitTestRebuild( std::stop_token aStop )
{
    for( ;; )
    {
        while( m_hitTestDirty.exchange( false ) )
        {
            if( aStop.stop_requested() || !m_canvas )
                return;
 
            m_canvas->ReloadRaytracingForHitTesting( aStop );
        }
 
        m_bgWorkerBusy = false;
 
        // Pick up a request that raced the release above.
        if( !m_hitTestDirty || m_bgWorkerBusy.exchange( true ) )
            return;
    }
}
 
 
void RENDER_3D_OPENGL::StopBgWorker()
{
    wxLogTrace( m_logTrace, wxT( "RENDER_3D_OPENGL::StopBgWorker" ) );
 
    if( m_bgWorkerThread.joinable() )
    {
        if( m_activityReporter )
            m_activityReporter->Report( _( "Stopping background load..." ) );
 
        m_bgWorkerThread.request_stop();
        m_bgWorkerThread.join();
    }
 
    m_bgWorkerBusy = false;
}
 
 
void RENDER_3D_OPENGL::JoinBgWorker()
{
    wxLogTrace( m_logTrace, wxT( "RENDER_3D_OPENGL::JoinBgWorker" ) );
 
    if( m_bgWorkerThread.joinable() )
        m_bgWorkerThread.join();
}
 
 
void RENDER_3D_OPENGL::addTopAndBottomTriangles( std::shared_ptr<TRIANGLE_DISPLAY_LIST> aDst, const SFVEC2F& v0,
                                                 const SFVEC2F& v1, const SFVEC2F& v2, float top, float bot )
{
    aDst->m_layer_bot_triangles->AddTriangle( SFVEC3F( v0.x, v0.y, bot ),
                                              SFVEC3F( v1.x, v1.y, bot ),
                                              SFVEC3F( v2.x, v2.y, bot ) );
 
    aDst->m_layer_top_triangles->AddTriangle( SFVEC3F( v2.x, v2.y, top ),
                                              SFVEC3F( v1.x, v1.y, top ),
                                              SFVEC3F( v0.x, v0.y, top ) );
}
 
 
void RENDER_3D_OPENGL::getLayerZPos( PCB_LAYER_ID aLayer, float& aOutZtop, float& aOutZbot ) const
{
    aOutZbot = m_boardAdapter.GetLayerBottomZPos( aLayer );
    aOutZtop = m_boardAdapter.GetLayerTopZPos( aLayer );
 
    if( aOutZtop < aOutZbot )
    {
        float tmpFloat = aOutZbot;
        aOutZbot = aOutZtop;
        aOutZtop = tmpFloat;
    }
}
 
 
void RENDER_3D_OPENGL::generateCylinder( const SFVEC2F& aCenter, float aInnerRadius, float aOuterRadius, float aZtop,
                                         float aZbot, unsigned int aNr_sides_per_circle,
                                         std::shared_ptr<TRIANGLE_DISPLAY_LIST> aDstLayer )
{
    std::vector< SFVEC2F > innerContour;
    std::vector< SFVEC2F > outerContour;
 
    generateRing( aCenter, aInnerRadius, aOuterRadius, aNr_sides_per_circle, innerContour,
                  outerContour, false );
 
    for( unsigned int i = 0; i < ( innerContour.size() - 1 ); ++i )
    {
        const SFVEC2F& vi0 = innerContour[i + 0];
        const SFVEC2F& vi1 = innerContour[i + 1];
        const SFVEC2F& vo0 = outerContour[i + 0];
        const SFVEC2F& vo1 = outerContour[i + 1];
 
        aDstLayer->m_layer_top_triangles->AddQuad( SFVEC3F( vi1.x, vi1.y, aZtop ),
                                                   SFVEC3F( vi0.x, vi0.y, aZtop ),
                                                   SFVEC3F( vo0.x, vo0.y, aZtop ),
                                                   SFVEC3F( vo1.x, vo1.y, aZtop ) );
 
        aDstLayer->m_layer_bot_triangles->AddQuad( SFVEC3F( vi1.x, vi1.y, aZbot ),
                                                   SFVEC3F( vo1.x, vo1.y, aZbot ),
                                                   SFVEC3F( vo0.x, vo0.y, aZbot ),
                                                   SFVEC3F( vi0.x, vi0.y, aZbot ) );
    }
 
    aDstLayer->AddToMiddleContours( outerContour, aZbot, aZtop, true );
    aDstLayer->AddToMiddleContours( innerContour, aZbot, aZtop, false );
}
 
 
void RENDER_3D_OPENGL::generateInvCone( const SFVEC2F& aCenter, float aInnerRadius, float aOuterRadius, float aZtop,
                                        float aZbot, unsigned int aNr_sides_per_circle,
                                        std::shared_ptr<TRIANGLE_DISPLAY_LIST> aDstLayer, EDA_ANGLE aAngle )
{
    // For a countersink cone:
    // - The outer contour goes from aZbot to aZtop (full height)
    // - The inner contour goes from aZbot to aZbot + innerHeight
    // - The top surface is conical, sloping from inner top to outer top
    // - aAngle is the half-angle of the cone (in decidegrees from the vertical)
 
    // Calculate the inner contour height based on the cone angle
    // tan(angle) = (outerRadius - innerRadius) / innerHeight
    // innerHeight = (outerRadius - innerRadius) / tan(angle)
    float radialDiff = aOuterRadius - aInnerRadius;
    float angleRad = aAngle.AsRadians();
 
    // Clamp angle to avoid division by zero or negative heights
    if( angleRad < 0.01f )
        angleRad = 0.01f;
 
    float innerHeight = radialDiff / tanf( angleRad );
    float totalHeight = aZtop - aZbot;
 
    // Clamp inner height to not exceed total height
    if( innerHeight > totalHeight )
        innerHeight = totalHeight;
 
    float zInnerTop = aZbot + innerHeight;
 
    std::vector< SFVEC2F > innerContour;
    std::vector< SFVEC2F > outerContour;
 
    generateRing( aCenter, aInnerRadius, aOuterRadius, aNr_sides_per_circle, innerContour,
                  outerContour, false );
 
    for( unsigned int i = 0; i < ( innerContour.size() - 1 ); ++i )
    {
        const SFVEC2F& vi0 = innerContour[i + 0];
        const SFVEC2F& vi1 = innerContour[i + 1];
        const SFVEC2F& vo0 = outerContour[i + 0];
        const SFVEC2F& vo1 = outerContour[i + 1];
 
        // Conical top surface: from inner contour at zInnerTop to outer contour at aZtop
        aDstLayer->m_layer_top_triangles->AddQuad( SFVEC3F( vi1.x, vi1.y, zInnerTop ),
                                                   SFVEC3F( vi0.x, vi0.y, zInnerTop ),
                                                   SFVEC3F( vo0.x, vo0.y, aZtop ),
                                                   SFVEC3F( vo1.x, vo1.y, aZtop ) );
 
        // Flat bottom surface
        aDstLayer->m_layer_bot_triangles->AddQuad( SFVEC3F( vi1.x, vi1.y, aZbot ),
                                                   SFVEC3F( vo1.x, vo1.y, aZbot ),
                                                   SFVEC3F( vo0.x, vo0.y, aZbot ),
                                                   SFVEC3F( vi0.x, vi0.y, aZbot ) );
    }
 
    // Outer contour wall goes full height
    aDstLayer->AddToMiddleContours( outerContour, aZbot, aZtop, true );
    // Inner contour wall only goes up to zInnerTop
    aDstLayer->AddToMiddleContours( innerContour, aZbot, zInnerTop, false );
}
 
 
void RENDER_3D_OPENGL::generateDisk( const SFVEC2F& aCenter, float aRadius, float aZ, unsigned int aNr_sides_per_circle,
                                     std::shared_ptr<TRIANGLE_DISPLAY_LIST> aDstLayer, bool aTop )
{
    const float delta = 2.0f * glm::pi<float>() / (float) aNr_sides_per_circle;
 
    for( unsigned int i = 0; i < aNr_sides_per_circle; ++i )
    {
        float a0 = delta * i;
        float a1 = delta * ( i + 1 );
        const SFVEC3F p0( aCenter.x + cosf( a0 ) * aRadius,
                          aCenter.y + sinf( a0 ) * aRadius, aZ );
        const SFVEC3F p1( aCenter.x + cosf( a1 ) * aRadius,
                          aCenter.y + sinf( a1 ) * aRadius, aZ );
        const SFVEC3F c( aCenter.x, aCenter.y, aZ );
 
        if( aTop )
            aDstLayer->m_layer_top_triangles->AddTriangle( p1, p0, c );
        else
            aDstLayer->m_layer_bot_triangles->AddTriangle( p0, p1, c );
    }
}
 
 
void RENDER_3D_OPENGL::generateDimple( const SFVEC2F& aCenter, float aRadius, float aZ, float aDepth,
                                       unsigned int                           aNr_sides_per_circle,
                                       std::shared_ptr<TRIANGLE_DISPLAY_LIST> aDstLayer, bool aTop )
{
    const float delta = 2.0f * glm::pi<float>() / (float) aNr_sides_per_circle;
    const SFVEC3F c( aCenter.x, aCenter.y, aTop ? aZ - aDepth : aZ + aDepth );
 
    for( unsigned int i = 0; i < aNr_sides_per_circle; ++i )
    {
        float a0 = delta * i;
        float a1 = delta * ( i + 1 );
        const SFVEC3F p0( aCenter.x + cosf( a0 ) * aRadius,
                          aCenter.y + sinf( a0 ) * aRadius, aZ );
        const SFVEC3F p1( aCenter.x + cosf( a1 ) * aRadius,
                          aCenter.y + sinf( a1 ) * aRadius, aZ );
 
        if( aTop )
            aDstLayer->m_layer_top_triangles->AddTriangle( p0, p1, c );
        else
            aDstLayer->m_layer_bot_triangles->AddTriangle( p1, p0, c );
    }
}
 
 
bool RENDER_3D_OPENGL::appendPostMachiningGeometry( std::shared_ptr<TRIANGLE_DISPLAY_LIST> aDstLayer,
                                                    const SFVEC2F& aHoleCenter,
                                                    PAD_DRILL_POST_MACHINING_MODE aMode,
                                                    int aSizeIU,
                                                    int aDepthIU,
                                                    float aHoleInnerRadius,
                                                    float aZSurface,
                                                    bool aIsFront,
                                                    float aPlatingThickness3d,
                                                    float aUnitScale,
                                                    float* aZEnd )
{
    if( !m_boardAdapter.m_Cfg->m_Render.show_plated_barrels )
        return false;
 
    if( !aDstLayer || aPlatingThickness3d <= 0.0f || aHoleInnerRadius <= 0.0f )
        return false;
 
    if( aMode != PAD_DRILL_POST_MACHINING_MODE::COUNTERBORE
            && aMode != PAD_DRILL_POST_MACHINING_MODE::COUNTERSINK )
    {
        return false;
    }
 
    if( aSizeIU <= 0 || aDepthIU <= 0 )
        return false;
 
    const float radius = aSizeIU * 0.5f * aUnitScale;
    const float depth = aDepthIU * aUnitScale;
 
    if( radius <= aHoleInnerRadius || depth <= 0.0f )
        return false;
 
    float zEnd = aIsFront ? ( aZSurface - depth ) : ( aZSurface + depth );
 
    if( aZEnd )
        *aZEnd = zEnd;
 
    const float zTop = std::max( aZSurface, zEnd );
    const float zBot = std::min( aZSurface, zEnd );
 
    const int diameterBIU = std::max( aSizeIU,
                                      std::max( 1,
                                                (int) ( ( aHoleInnerRadius * 2.0f )
                                                        / aUnitScale ) ) );
    const unsigned int nrSegments =
            std::max( 12u, m_boardAdapter.GetCircleSegmentCount( diameterBIU ) );
 
    if( aMode == PAD_DRILL_POST_MACHINING_MODE::COUNTERBORE )
    {
        generateCylinder( aHoleCenter, radius, radius + aPlatingThickness3d, zTop, zBot,
                          nrSegments, aDstLayer );
        return true;
    }
 
    float csTopRadius = radius;
    float csBotRadius = aHoleInnerRadius;
 
    std::vector< SFVEC2F > innerContourTop, outerContourTop;
    std::vector< SFVEC2F > innerContourBot, outerContourBot;
 
    generateRing( aHoleCenter, csTopRadius, csTopRadius + aPlatingThickness3d, nrSegments,
                  innerContourTop, outerContourTop, false );
    generateRing( aHoleCenter, csBotRadius, csBotRadius + aPlatingThickness3d, nrSegments,
                  innerContourBot, outerContourBot, false );
 
    for( unsigned int i = 0; i < ( innerContourTop.size() - 1 ); ++i )
    {
        const SFVEC2F& vi0_top = innerContourTop[i + 0];
        const SFVEC2F& vi1_top = innerContourTop[i + 1];
        const SFVEC2F& vo0_top = outerContourTop[i + 0];
        const SFVEC2F& vo1_top = outerContourTop[i + 1];
 
        const SFVEC2F& vi0_bot = innerContourBot[i + 0];
        const SFVEC2F& vi1_bot = innerContourBot[i + 1];
        const SFVEC2F& vo0_bot = outerContourBot[i + 0];
        const SFVEC2F& vo1_bot = outerContourBot[i + 1];
 
        aDstLayer->m_layer_middle_contours_quads->AddQuad(
                SFVEC3F( vi1_top.x, vi1_top.y, zTop ),
                SFVEC3F( vi0_top.x, vi0_top.y, zTop ),
                SFVEC3F( vi0_bot.x, vi0_bot.y, zBot ),
                SFVEC3F( vi1_bot.x, vi1_bot.y, zBot ) );
 
        aDstLayer->m_layer_middle_contours_quads->AddQuad(
                SFVEC3F( vo1_top.x, vo1_top.y, zTop ),
                SFVEC3F( vo0_top.x, vo0_top.y, zTop ),
                SFVEC3F( vo0_bot.x, vo0_bot.y, zBot ),
                SFVEC3F( vo1_bot.x, vo1_bot.y, zBot ) );
    }
 
    return true;
}
 
 
void RENDER_3D_OPENGL::generateViaBarrels( float aPlatingThickness3d, float aUnitScale )
{
    if( !m_boardAdapter.GetBoard() || m_boardAdapter.GetViaCount() <= 0 )
        return;
 
    if( !m_boardAdapter.m_Cfg->m_Render.show_plated_barrels )
        return;
 
    float        averageDiameter = m_boardAdapter.GetAverageViaHoleDiameter();
    unsigned int averageSegCount = m_boardAdapter.GetCircleSegmentCount( averageDiameter );
    unsigned int trianglesEstimate = averageSegCount * 8 * m_boardAdapter.GetViaCount();
 
    std::shared_ptr<TRIANGLE_DISPLAY_LIST> layerTriangleVIA = std::make_shared<TRIANGLE_DISPLAY_LIST>( trianglesEstimate );
 
    for( const PCB_TRACK* track : m_boardAdapter.GetBoard()->Tracks() )
    {
        if( track->Type() != PCB_VIA_T )
            continue;
 
        const PCB_VIA* via = static_cast<const PCB_VIA*>( track );
        bool isBackdrilled = via->GetSecondaryDrillSize().has_value();
        bool isTertiarydrilled = via->GetTertiaryDrillSize().has_value();
        bool hasFrontPostMachining = via->GetFrontPostMachining().value_or( PAD_DRILL_POST_MACHINING_MODE::UNKNOWN )
                                     != PAD_DRILL_POST_MACHINING_MODE::UNKNOWN
                                     && via->GetFrontPostMachining().value_or( PAD_DRILL_POST_MACHINING_MODE::UNKNOWN )
                                                != PAD_DRILL_POST_MACHINING_MODE::NOT_POST_MACHINED;
        bool hasBackPostMachining = via->GetBackPostMachining().value_or( PAD_DRILL_POST_MACHINING_MODE::UNKNOWN )
                                    != PAD_DRILL_POST_MACHINING_MODE::UNKNOWN
                                    && via->GetBackPostMachining().value_or( PAD_DRILL_POST_MACHINING_MODE::UNKNOWN )
                                               != PAD_DRILL_POST_MACHINING_MODE::NOT_POST_MACHINED;
 
        if( via->GetViaType() == VIATYPE::THROUGH && !isBackdrilled
                && !hasFrontPostMachining && !hasBackPostMachining )
        {
            continue;
        }
 
        const float holediameter = via->GetDrillValue() * aUnitScale;
        const int nrSegments = m_boardAdapter.GetCircleSegmentCount( via->GetDrillValue() );
        const float hole_inner_radius = holediameter / 2.0f;
 
        const SFVEC2F via_center( via->GetStart().x * aUnitScale,
                                  -via->GetStart().y * aUnitScale );
 
        PCB_LAYER_ID top_layer, bottom_layer;
        via->LayerPair( &top_layer, &bottom_layer );
 
        float ztop, zbot, dummy;
 
        getLayerZPos( top_layer, ztop, dummy );
        getLayerZPos( bottom_layer, dummy, zbot );
 
        wxASSERT( zbot < ztop );
 
        float ztop_plated = ztop;
        float zbot_plated = zbot;
 
        if( isBackdrilled )
        {
            PCB_LAYER_ID secEnd = via->GetSecondaryDrillEndLayer();
            float secZEnd;
 
            // Backdrill goes from the back surface up to secEnd, so get the top of that layer
            // as the bottom of the plated barrel
            getLayerZPos( secEnd, secZEnd, dummy );
            zbot_plated = std::max( zbot_plated, secZEnd );
        }
 
        if( isTertiarydrilled )
        {
            PCB_LAYER_ID terEnd = via->GetTertiaryDrillEndLayer();
            float terZEnd;
 
            // Tertiary drill goes from the front surface down to terEnd, so get the bottom of that layer
            // as the top of the plated barrel
            getLayerZPos( terEnd, dummy, terZEnd );
            ztop_plated = std::min( ztop_plated, terZEnd );
        }
 
        auto applyViaPostMachining = [&]( bool isFront )
        {
            auto modeOpt = isFront ? via->GetFrontPostMachining()
                                   : via->GetBackPostMachining();
 
            if( !modeOpt
                    || modeOpt.value() == PAD_DRILL_POST_MACHINING_MODE::NOT_POST_MACHINED )
            {
                return;
            }
 
            int sizeIU = isFront ? via->GetFrontPostMachiningSize()
                                  : via->GetBackPostMachiningSize();
            int depthIU = isFront ? via->GetFrontPostMachiningDepth()
                                   : via->GetBackPostMachiningDepth();
            float zSurface = isFront ? ztop : zbot;
            float zEnd = 0.0f;
 
            if( appendPostMachiningGeometry( layerTriangleVIA, via_center, modeOpt.value(),
                                             sizeIU, depthIU, hole_inner_radius, zSurface,
                                             isFront, aPlatingThickness3d, aUnitScale, &zEnd ) )
            {
                if( isFront )
                    ztop_plated = std::min( ztop_plated, zEnd );
                else
                    zbot_plated = std::max( zbot_plated, zEnd );
            }
        };
 
        if( hasFrontPostMachining )
            applyViaPostMachining( true );
        if( hasBackPostMachining )
            applyViaPostMachining( false );
 
        generateCylinder( via_center, hole_inner_radius, hole_inner_radius + aPlatingThickness3d, ztop_plated,
                          zbot_plated, nrSegments, layerTriangleVIA );
    }
 
    const float padFrontSurface =
            m_boardAdapter.GetLayerBottomZPos( F_Cu )
            + m_boardAdapter.GetFrontCopperThickness() * 0.99f;
    const float padBackSurface =
            m_boardAdapter.GetLayerBottomZPos( B_Cu )
            - m_boardAdapter.GetBackCopperThickness() * 0.99f;
 
    for( const FOOTPRINT* footprint : m_boardAdapter.GetBoard()->Footprints() )
    {
        for( const PAD* pad : footprint->Pads() )
        {
            if( pad->GetAttribute() == PAD_ATTRIB::NPTH )
                continue;
 
            if( !pad->HasHole() )
                continue;
 
            if( pad->GetDrillShape() != PAD_DRILL_SHAPE::CIRCLE )
                continue;
 
            const SFVEC2F padCenter( pad->GetPosition().x * aUnitScale,
                                        -pad->GetPosition().y * aUnitScale );
            const float holeInnerRadius =
                    pad->GetDrillSize().x * 0.5f * aUnitScale;
 
            auto emitPadPostMachining = [&]( bool isFront )
            {
                auto modeOpt = isFront ? pad->GetFrontPostMachining()
                                        : pad->GetBackPostMachining();
 
                if( !modeOpt
                        || modeOpt.value() == PAD_DRILL_POST_MACHINING_MODE::NOT_POST_MACHINED )
                {
                    return;
                }
 
                int sizeIU = isFront ? pad->GetFrontPostMachiningSize()
                                        : pad->GetBackPostMachiningSize();
                int depthIU = isFront ? pad->GetFrontPostMachiningDepth()
                                        : pad->GetBackPostMachiningDepth();
                float zSurface = isFront ? padFrontSurface : padBackSurface;
 
                appendPostMachiningGeometry( layerTriangleVIA, padCenter, modeOpt.value(),
                                                sizeIU, depthIU, holeInnerRadius, zSurface,
                                                isFront, aPlatingThickness3d, aUnitScale,
                                                nullptr );
            };
 
            emitPadPostMachining( true );
            emitPadPostMachining( false );
        }
    }
 
    assignRenderPtr( m_microviaHoles,
                     std::make_shared<OPENGL_RENDER_LIST_DEFERRED>( layerTriangleVIA, 0, 0.0f, 0.0f ) );
}
 
 
void RENDER_3D_OPENGL::generatePlatedHoleShells( int aPlatingThickness, float aUnitScale )
{
    if( !m_boardAdapter.GetBoard() )
        return;
 
    if( m_boardAdapter.GetHoleCount() <= 0 && m_boardAdapter.GetViaCount() <= 0 )
        return;
 
    SHAPE_POLY_SET tht_outer_holes_poly; // Stores the outer poly of the copper holes
    SHAPE_POLY_SET tht_inner_holes_poly; // Stores the inner poly of the copper holes
    // Same as ***_holes_poly but for vias that are capped
    SHAPE_POLY_SET capped_outer_vias_poly;
    SHAPE_POLY_SET capped_inner_vias_poly;
 
    tht_outer_holes_poly.RemoveAllContours();
    tht_inner_holes_poly.RemoveAllContours();
    capped_outer_vias_poly.RemoveAllContours();
    capped_inner_vias_poly.RemoveAllContours();
 
    for( const PCB_TRACK* track : m_boardAdapter.GetBoard()->Tracks() )
    {
        if( track->Type() != PCB_VIA_T )
            continue;
 
        const PCB_VIA* via = static_cast<const PCB_VIA*>( track );
 
        if( via->GetViaType() == VIATYPE::THROUGH )
        {
            const bool capped = via->GetCappingMode() == CAPPING_MODE::CAPPED;
 
            TransformCircleToPolygon( capped ? capped_outer_vias_poly : tht_outer_holes_poly, via->GetPosition(),
                                      via->GetDrill() / 2 + aPlatingThickness, via->GetMaxError(), ERROR_INSIDE );
 
            TransformCircleToPolygon( capped ? capped_inner_vias_poly : tht_inner_holes_poly, via->GetPosition(),
                                      via->GetDrill() / 2, via->GetMaxError(), ERROR_INSIDE );
        }
    }
 
    for( const FOOTPRINT* footprint : m_boardAdapter.GetBoard()->Footprints() )
    {
        for( const PAD* pad : footprint->Pads() )
        {
            if( pad->GetAttribute() != PAD_ATTRIB::NPTH )
            {
                if( !pad->HasHole() )
                    continue;
 
                pad->TransformHoleToPolygon( tht_outer_holes_poly, aPlatingThickness,
                                             pad->GetMaxError(), ERROR_INSIDE );
                pad->TransformHoleToPolygon( tht_inner_holes_poly, 0,
                                             pad->GetMaxError(), ERROR_INSIDE );
            }
        }
    }
 
    tht_outer_holes_poly.BooleanSubtract( tht_inner_holes_poly );
    tht_outer_holes_poly.BooleanSubtract( m_antiBoardPolys );
 
    tht_outer_holes_poly.BooleanAdd( capped_outer_vias_poly );
    tht_inner_holes_poly.BooleanAdd( capped_inner_vias_poly );
 
    CONTAINER_2D holesContainer;
 
    ConvertPolygonToTriangles( tht_outer_holes_poly, holesContainer,
                               aUnitScale, *m_boardAdapter.GetBoard() );
 
    const LIST_OBJECT2D& holes2D = holesContainer.GetList();
 
    if( holes2D.size() > 0 && m_boardAdapter.m_Cfg->m_Render.show_plated_barrels )
    {
        float layer_z_top, layer_z_bot, dummy;
 
        getLayerZPos( F_Cu, layer_z_top, dummy );
        getLayerZPos( B_Cu, dummy, layer_z_bot );
 
        std::shared_ptr<TRIANGLE_DISPLAY_LIST> layerTriangles = std::make_shared<TRIANGLE_DISPLAY_LIST>( holes2D.size() );
 
        for( const OBJECT_2D* itemOnLayer : holes2D )
        {
            const OBJECT_2D* object2d_A = itemOnLayer;
 
            wxASSERT( object2d_A->GetObjectType() == OBJECT_2D_TYPE::TRIANGLE );
 
            const TRIANGLE_2D* tri = static_cast<const TRIANGLE_2D*>( object2d_A );
 
            const SFVEC2F& v1 = tri->GetP1();
            const SFVEC2F& v2 = tri->GetP2();
            const SFVEC2F& v3 = tri->GetP3();
 
            addTopAndBottomTriangles( layerTriangles, v1, v2, v3, layer_z_top, layer_z_bot );
        }
 
        wxASSERT( tht_outer_holes_poly.OutlineCount() > 0 );
 
        if( tht_outer_holes_poly.OutlineCount() > 0 )
        {
            layerTriangles->AddToMiddleContours( tht_outer_holes_poly,
                                                 layer_z_bot, layer_z_top,
                                                 aUnitScale, false );
 
            assignRenderPtr( m_padHoles,
                             std::make_shared<OPENGL_RENDER_LIST_DEFERRED>( layerTriangles, m_circleTexture, layer_z_top,
                                                                            layer_z_top ) );
        }
    }
}
 
 
void RENDER_3D_OPENGL::generateViaCovers( float aPlatingThickness3d, float aUnitScale )
{
    if( !m_boardAdapter.GetBoard() || m_boardAdapter.GetViaCount() <= 0 )
        return;
 
    std::shared_ptr<TRIANGLE_DISPLAY_LIST> frontCover = std::make_shared<TRIANGLE_DISPLAY_LIST>( m_boardAdapter.GetViaCount() );
    std::shared_ptr<TRIANGLE_DISPLAY_LIST> backCover = std::make_shared<TRIANGLE_DISPLAY_LIST>( m_boardAdapter.GetViaCount() );
 
    for( const PCB_TRACK* track : m_boardAdapter.GetBoard()->Tracks() )
    {
        if( track->Type() != PCB_VIA_T )
            continue;
 
        const PCB_VIA* via = static_cast<const PCB_VIA*>( track );
 
        const float holediameter = via->GetDrillValue() * aUnitScale;
        const float hole_radius = holediameter / 2.0f + 2.0f * aPlatingThickness3d;
        const SFVEC2F center( via->GetStart().x * aUnitScale,
                              -via->GetStart().y * aUnitScale );
        unsigned int seg = m_boardAdapter.GetCircleSegmentCount( via->GetDrillValue() );
 
        PCB_LAYER_ID top_layer, bottom_layer;
        via->LayerPair( &top_layer, &bottom_layer );
        float ztop, zbot, dummy;
        getLayerZPos( top_layer, ztop, dummy );
        getLayerZPos( bottom_layer, dummy, zbot );
 
        bool frontCovering = via->GetFrontCoveringMode() == COVERING_MODE::COVERED
                             || via->IsTented( F_Mask );
        bool backCovering = via->GetBackCoveringMode() == COVERING_MODE::COVERED
                            || via->IsTented( B_Mask );
        bool frontPlugged = via->GetFrontPluggingMode() == PLUGGING_MODE::PLUGGED;
        bool backPlugged  = via->GetBackPluggingMode() == PLUGGING_MODE::PLUGGED;
        bool filled = via->GetFillingMode() == FILLING_MODE::FILLED
                      || via->GetCappingMode() == CAPPING_MODE::CAPPED;
 
        const auto frontPostMachining =
                via->GetFrontPostMachining().value_or( PAD_DRILL_POST_MACHINING_MODE::NOT_POST_MACHINED );
        const auto backPostMachining =
                via->GetBackPostMachining().value_or( PAD_DRILL_POST_MACHINING_MODE::NOT_POST_MACHINED );
 
        bool hasFrontPostMachining = frontPostMachining != PAD_DRILL_POST_MACHINING_MODE::NOT_POST_MACHINED
                                     && frontPostMachining != PAD_DRILL_POST_MACHINING_MODE::UNKNOWN;
        bool hasBackPostMachining = backPostMachining != PAD_DRILL_POST_MACHINING_MODE::NOT_POST_MACHINED
                                    && backPostMachining != PAD_DRILL_POST_MACHINING_MODE::UNKNOWN;
 
        bool hasFrontBackdrill = via->GetSecondaryDrillStartLayer() == F_Cu;
        bool hasBackBackdrill = via->GetSecondaryDrillStartLayer() == B_Cu;
 
        const float depth = hole_radius * 0.3f;
 
        if( frontCovering && !hasFrontPostMachining && !hasFrontBackdrill )
        {
            if( filled || !frontPlugged )
                generateDisk( center, hole_radius, ztop, seg, frontCover, true );
            else
                generateDimple( center, hole_radius, ztop, depth, seg, frontCover, true );
        }
 
        if( backCovering && !hasBackPostMachining && !hasBackBackdrill )
        {
            if( filled || !backPlugged )
                generateDisk( center, hole_radius, zbot, seg, backCover, false );
            else
                generateDimple( center, hole_radius, zbot, depth, seg, backCover, false );
        }
    }
 
    if( frontCover->m_layer_top_triangles->GetVertexSize() > 0 )
        assignRenderPtr( m_viaFrontCover,
                         std::make_shared<OPENGL_RENDER_LIST_DEFERRED>( frontCover, 0, 0.0f, 0.0f ) );
 
    if( backCover->m_layer_bot_triangles->GetVertexSize() > 0 )
        assignRenderPtr( m_viaBackCover,
                         std::make_shared<OPENGL_RENDER_LIST_DEFERRED>( backCover, 0, 0.0f, 0.0f ) );
}
 
 
void RENDER_3D_OPENGL::generateViasAndPads()
{
    if( !m_boardAdapter.GetBoard() )
        return;
 
    const int   platingThickness    = m_boardAdapter.GetHolePlatingThickness();
    const float unitScale           = m_boardAdapter.BiuTo3dUnits();
    const float platingThickness3d  = platingThickness * unitScale;
 
    generateViaBarrels( platingThickness3d, unitScale );
    generatePlatedHoleShells( platingThickness, unitScale );
    generateViaCovers( platingThickness3d, unitScale );
}
 
 
void RENDER_3D_OPENGL::Load3dModelsIfNeeded()
{
    if( m_3dModelMap.size() > 0 )
        return;
 
    load3dModels();
}
 
 
void RENDER_3D_OPENGL::load3dModels( std::stop_token aStop )
{
    if( !m_boardAdapter.GetBoard() )
        return;
 
    // Building the 3D models late crashes on recent versions of macOS
    // Unclear the exact mechanism, but as a workaround, just build them
    // all the time.  See https://gitlab.com/kicad/code/kicad/-/issues/17198
#ifndef __WXMAC__
    if( !m_boardAdapter.m_IsPreviewer
          && !m_boardAdapter.m_Cfg->m_Render.show_footprints_normal
          && !m_boardAdapter.m_Cfg->m_Render.show_footprints_insert
          && !m_boardAdapter.m_Cfg->m_Render.show_footprints_virtual )
    {
        return;
    }
#endif
 
    S3D_CACHE* cacheMgr = m_boardAdapter.Get3dCacheManager();
 
    // Go for all footprints
    for( const FOOTPRINT* footprint : m_boardAdapter.GetBoard()->Footprints() )
    {
        const wxString footprintBasePath = m_boardAdapter.GetFootprintLibraryPath( footprint );
 
        for( const FP_3DMODEL& fp_model : footprint->Models() )
        {
            if( fp_model.m_Show && !fp_model.m_Filename.empty() )
            {
                if( m_activityReporter )
                {
                    // Display the short filename of the 3D fp_model loaded:
                    // (the full name is usually too long to be displayed)
                    wxFileName fn( fp_model.m_Filename );
                    m_activityReporter->Report( wxString::Format( _( "Loading %s..." ), fn.GetFullName() ) );
                }
 
                // Check if the fp_model is not present in our cache map
                // (Not already loaded in memory)
                if( !m_3dModelMap.contains( fp_model.m_Filename ) )
                {
                    // It is not present, try get it from cache
                    std::vector<const EMBEDDED_FILES*> embeddedFilesStack;
                    embeddedFilesStack.push_back( footprint->GetEmbeddedFiles() );
                    embeddedFilesStack.push_back( m_boardAdapter.GetBoard()->GetEmbeddedFiles() );
 
                    const S3DMODEL* modelPtr = cacheMgr->GetModel( fp_model.m_Filename, footprintBasePath,
                                                                   std::move( embeddedFilesStack ) );
 
                    // only add it if the return is not NULL
                    if( modelPtr )
                    {
                        MATERIAL_MODE materialMode = m_boardAdapter.m_Cfg->m_Render.material_mode;
                        auto          model = std::make_shared<MODEL_3D_DEFERRED>( *modelPtr, materialMode );
 
                        assignRenderMap( m_3dModelMap, fp_model.m_Filename, model );
                    }
                }
            }
 
            if( aStop.stop_requested() )
                return;
        }
 
        sendRefreshView();
    }
}