render_3d_opengl.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2015-2020 Mario Luzeiro <[email protected]>
 * Copyright (C) 2023 CERN
 * Copyright (C) 2015-2024 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, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 */
 
#include <cstdint>
#include <gal/opengl/kiglew.h> // Must be included first
 
#include "plugins/3dapi/xv3d_types.h"
#include "render_3d_opengl.h"
#include "opengl_utils.h"
#include "common_ogl/ogl_utils.h"
#include <board.h>
#include <footprint.h>
#include <3d_math.h>
#include <glm/geometric.hpp>
#include <lset.h>
#include <math/util.h> // for KiROUND
#include <utility>
#include <vector>
#include <wx/log.h>
 
#include <base_units.h>
 
#define UNITS3D_TO_UNITSPCB ( pcbIUScale.IU_PER_MM )
 
RENDER_3D_OPENGL::RENDER_3D_OPENGL( EDA_3D_CANVAS* aCanvas, BOARD_ADAPTER& aAdapter,
 CAMERA& aCamera ) :
 RENDER_3D_BASE( aAdapter, aCamera ),
 m_canvas( aCanvas )
{
 wxLogTrace( m_logTrace, wxT( "RENDER_3D_OPENGL::RENDER_3D_OPENGL" ) );
 
 m_layers.clear();
 m_outerLayerHoles.clear();
 m_innerLayerHoles.clear();
 m_triangles.clear();
 m_board = nullptr;
 m_antiBoard = nullptr;
 
 m_platedPadsFront = nullptr;
 m_platedPadsBack = nullptr;
 m_offboardPadsFront = nullptr;
 m_offboardPadsBack = nullptr;
 
 m_outerThroughHoles = nullptr;
 m_outerThroughHoleRings = nullptr;
 m_outerViaThroughHoles = nullptr;
 m_vias = nullptr;
 m_padHoles = nullptr;
 
 m_circleTexture = 0;
 m_grid = 0;
 m_lastGridType = GRID3D_TYPE::NONE;
 m_currentRollOverItem = nullptr;
 m_boardWithHoles = nullptr;
 
 m_3dModelMap.clear();
}
 
 
RENDER_3D_OPENGL::~RENDER_3D_OPENGL()
{
 wxLogTrace( m_logTrace, wxT( "RENDER_3D_OPENGL::RENDER_3D_OPENGL" ) );
 
 freeAllLists();
 
 glDeleteTextures( 1, &m_circleTexture );
}
 
 
int RENDER_3D_OPENGL::GetWaitForEditingTimeOut()
{
 return 50; // ms
}
 
 
void RENDER_3D_OPENGL::SetCurWindowSize( const wxSize& aSize )
{
 if( m_windowSize != aSize )
 {
 m_windowSize = aSize;
 glViewport( 0, 0, m_windowSize.x, m_windowSize.y );
 
 // Initialize here any screen dependent data here
 }
}
 
 
void RENDER_3D_OPENGL::setLightFront( bool enabled )
{
 if( enabled )
 glEnable( GL_LIGHT0 );
 else
 glDisable( GL_LIGHT0 );
}
 
 
void RENDER_3D_OPENGL::setLightTop( bool enabled )
{
 if( enabled )
 glEnable( GL_LIGHT1 );
 else
 glDisable( GL_LIGHT1 );
}
 
 
void RENDER_3D_OPENGL::setLightBottom( bool enabled )
{
 if( enabled )
 glEnable( GL_LIGHT2 );
 else
 glDisable( GL_LIGHT2 );
}
 
 
void RENDER_3D_OPENGL::render3dArrows()
{
 const float arrow_size = RANGE_SCALE_3D * 0.30f;
 
 glDisable( GL_CULL_FACE );
 
 // YxY squared view port, this is on propose
 glViewport( 4, 4, m_windowSize.y / 8 , m_windowSize.y / 8 );
 glClear( GL_DEPTH_BUFFER_BIT );
 
 glMatrixMode( GL_PROJECTION );
 glLoadIdentity();
 gluPerspective( 45.0f, 1.0f, 0.001f, RANGE_SCALE_3D );
 
 glMatrixMode( GL_MODELVIEW );
 glLoadIdentity();
 
 const glm::mat4 TranslationMatrix =
 glm::translate( glm::mat4( 1.0f ), SFVEC3F( 0.0f, 0.0f, -( arrow_size * 2.75f ) ) );
 
 const glm::mat4 ViewMatrix = TranslationMatrix * m_camera.GetRotationMatrix();
 
 glLoadMatrixf( glm::value_ptr( ViewMatrix ) );
 
 setArrowMaterial();
 
 glColor3f( 0.9f, 0.0f, 0.0f );
 DrawRoundArrow( SFVEC3F( 0.0f, 0.0f, 0.0f ), SFVEC3F( arrow_size, 0.0f, 0.0f ), 0.275f );
 
 glColor3f( 0.0f, 0.9f, 0.0f );
 DrawRoundArrow( SFVEC3F( 0.0f, 0.0f, 0.0f ), SFVEC3F( 0.0f, arrow_size, 0.0f ), 0.275f );
 
 glColor3f( 0.0f, 0.0f, 0.9f );
 DrawRoundArrow( SFVEC3F( 0.0f, 0.0f, 0.0f ), SFVEC3F( 0.0f, 0.0f, arrow_size ), 0.275f );
 
 glEnable( GL_CULL_FACE );
}
 
 
void RENDER_3D_OPENGL::setupMaterials()
{
 m_materials = {};
 
 // http://devernay.free.fr/cours/opengl/materials.html
 
 // Plated copper
 // Copper material mixed with the copper color
 m_materials.m_Copper.m_Ambient = SFVEC3F( m_boardAdapter.m_CopperColor.r * 0.1f,
 m_boardAdapter.m_CopperColor.g * 0.1f,
 m_boardAdapter.m_CopperColor.b * 0.1f);
 
 m_materials.m_Copper.m_Specular = SFVEC3F( m_boardAdapter.m_CopperColor.r * 0.75f + 0.25f,
 m_boardAdapter.m_CopperColor.g * 0.75f + 0.25f,
 m_boardAdapter.m_CopperColor.b * 0.75f + 0.25f );
 
 // This guess the material type(ex: copper vs gold) to determine the
 // shininess factor between 0.1 and 0.4
 float shininessfactor = 0.40f - mapf( fabs( m_boardAdapter.m_CopperColor.r -
 m_boardAdapter.m_CopperColor.g ),
 0.15f, 1.00f,
 0.00f, 0.30f );
 
 m_materials.m_Copper.m_Shininess = shininessfactor * 128.0f;
 m_materials.m_Copper.m_Emissive = SFVEC3F( 0.0f, 0.0f, 0.0f );
 
 
 // Non plated copper (raw copper)
 m_materials.m_NonPlatedCopper.m_Ambient = SFVEC3F( 0.191f, 0.073f, 0.022f );
 m_materials.m_NonPlatedCopper.m_Diffuse = SFVEC3F( 184.0f / 255.0f, 115.0f / 255.0f,
 50.0f / 255.0f );
 m_materials.m_NonPlatedCopper.m_Specular = SFVEC3F( 0.256f, 0.137f, 0.086f );
 m_materials.m_NonPlatedCopper.m_Shininess = 0.1f * 128.0f;
 m_materials.m_NonPlatedCopper.m_Emissive = SFVEC3F( 0.0f, 0.0f, 0.0f );
 
 // Paste material mixed with paste color
 m_materials.m_Paste.m_Ambient = SFVEC3F( m_boardAdapter.m_SolderPasteColor.r,
 m_boardAdapter.m_SolderPasteColor.g,
 m_boardAdapter.m_SolderPasteColor.b );
 
 m_materials.m_Paste.m_Specular = SFVEC3F( m_boardAdapter.m_SolderPasteColor.r *
 m_boardAdapter.m_SolderPasteColor.r,
 m_boardAdapter.m_SolderPasteColor.g *
 m_boardAdapter.m_SolderPasteColor.g,
 m_boardAdapter.m_SolderPasteColor.b *
 m_boardAdapter.m_SolderPasteColor.b );
 
 m_materials.m_Paste.m_Shininess = 0.1f * 128.0f;
 m_materials.m_Paste.m_Emissive = SFVEC3F( 0.0f, 0.0f, 0.0f );
 
 // Silk screen material mixed with silk screen color
 m_materials.m_SilkSTop.m_Ambient = SFVEC3F( m_boardAdapter.m_SilkScreenColorTop.r,
 m_boardAdapter.m_SilkScreenColorTop.g,
 m_boardAdapter.m_SilkScreenColorTop.b );
 
 m_materials.m_SilkSTop.m_Specular = SFVEC3F(
 m_boardAdapter.m_SilkScreenColorTop.r * m_boardAdapter.m_SilkScreenColorTop.r + 0.10f,
 m_boardAdapter.m_SilkScreenColorTop.g * m_boardAdapter.m_SilkScreenColorTop.g + 0.10f,
 m_boardAdapter.m_SilkScreenColorTop.b * m_boardAdapter.m_SilkScreenColorTop.b + 0.10f );
 
 m_materials.m_SilkSTop.m_Shininess = 0.078125f * 128.0f;
 m_materials.m_SilkSTop.m_Emissive = SFVEC3F( 0.0f, 0.0f, 0.0f );
 
 // Silk screen material mixed with silk screen color
 m_materials.m_SilkSBot.m_Ambient = SFVEC3F( m_boardAdapter.m_SilkScreenColorBot.r,
 m_boardAdapter.m_SilkScreenColorBot.g,
 m_boardAdapter.m_SilkScreenColorBot.b );
 
 m_materials.m_SilkSBot.m_Specular = SFVEC3F(
 m_boardAdapter.m_SilkScreenColorBot.r * m_boardAdapter.m_SilkScreenColorBot.r + 0.10f,
 m_boardAdapter.m_SilkScreenColorBot.g * m_boardAdapter.m_SilkScreenColorBot.g + 0.10f,
 m_boardAdapter.m_SilkScreenColorBot.b * m_boardAdapter.m_SilkScreenColorBot.b + 0.10f );
 
 m_materials.m_SilkSBot.m_Shininess = 0.078125f * 128.0f;
 m_materials.m_SilkSBot.m_Emissive = SFVEC3F( 0.0f, 0.0f, 0.0f );
 
 m_materials.m_SolderMask.m_Shininess = 0.8f * 128.0f;
 m_materials.m_SolderMask.m_Emissive = SFVEC3F( 0.0f, 0.0f, 0.0f );
 
 // Epoxy material
 m_materials.m_EpoxyBoard.m_Ambient = SFVEC3F( 117.0f / 255.0f, 97.0f / 255.0f,
 47.0f / 255.0f );
 
 m_materials.m_EpoxyBoard.m_Specular = SFVEC3F( 18.0f / 255.0f, 3.0f / 255.0f,
 20.0f / 255.0f );
 
 m_materials.m_EpoxyBoard.m_Shininess = 0.1f * 128.0f;
 m_materials.m_EpoxyBoard.m_Emissive = SFVEC3F( 0.0f, 0.0f, 0.0f );
}
 
 
void RENDER_3D_OPENGL::setLayerMaterial( PCB_LAYER_ID aLayerID )
{
 switch( aLayerID )
 {
 case F_Mask:
 case B_Mask:
 {
 const SFVEC4F layerColor = aLayerID == F_Mask ? m_boardAdapter.m_SolderMaskColorTop
 : m_boardAdapter.m_SolderMaskColorBot;
 
 m_materials.m_SolderMask.m_Diffuse = layerColor;
 
 // Convert Opacity to Transparency
 m_materials.m_SolderMask.m_Transparency = 1.0f - layerColor.a;
 
 m_materials.m_SolderMask.m_Ambient = m_materials.m_SolderMask.m_Diffuse * 0.3f;
 
 m_materials.m_SolderMask.m_Specular = m_materials.m_SolderMask.m_Diffuse
 * m_materials.m_SolderMask.m_Diffuse;
 
 OglSetMaterial( m_materials.m_SolderMask, 1.0f );
 break;
 }
 
 case B_Paste:
 case F_Paste:
 m_materials.m_Paste.m_Diffuse = m_boardAdapter.m_SolderPasteColor;
 OglSetMaterial( m_materials.m_Paste, 1.0f );
 break;
 
 case B_SilkS:
 m_materials.m_SilkSBot.m_Diffuse = m_boardAdapter.m_SilkScreenColorBot;
 OglSetMaterial( m_materials.m_SilkSBot, 1.0f );
 break;
 
 case F_SilkS:
 m_materials.m_SilkSTop.m_Diffuse = m_boardAdapter.m_SilkScreenColorTop;
 OglSetMaterial( m_materials.m_SilkSTop, 1.0f );
 break;
 
 case B_Adhes:
 case F_Adhes:
 case Dwgs_User:
 case Cmts_User:
 case Eco1_User:
 case Eco2_User:
 case Edge_Cuts:
 case Margin:
 case B_CrtYd:
 case F_CrtYd:
 case B_Fab:
 case F_Fab:
 switch( aLayerID )
 {
 case Dwgs_User: m_materials.m_Plastic.m_Diffuse = m_boardAdapter.m_UserDrawingsColor; break;
 case Cmts_User: m_materials.m_Plastic.m_Diffuse = m_boardAdapter.m_UserCommentsColor; break;
 case Eco1_User: m_materials.m_Plastic.m_Diffuse = m_boardAdapter.m_ECO1Color; break;
 case Eco2_User: m_materials.m_Plastic.m_Diffuse = m_boardAdapter.m_ECO2Color; break;
 case Edge_Cuts: m_materials.m_Plastic.m_Diffuse = m_boardAdapter.m_UserDrawingsColor; break;
 case Margin: m_materials.m_Plastic.m_Diffuse = m_boardAdapter.m_UserDrawingsColor; break;
 default:
 m_materials.m_Plastic.m_Diffuse = m_boardAdapter.GetLayerColor( aLayerID );
 break;
 }
 
 m_materials.m_Plastic.m_Ambient = SFVEC3F( m_materials.m_Plastic.m_Diffuse.r * 0.05f,
 m_materials.m_Plastic.m_Diffuse.g * 0.05f,
 m_materials.m_Plastic.m_Diffuse.b * 0.05f );
 
 m_materials.m_Plastic.m_Specular = SFVEC3F( m_materials.m_Plastic.m_Diffuse.r * 0.7f,
 m_materials.m_Plastic.m_Diffuse.g * 0.7f,
 m_materials.m_Plastic.m_Diffuse.b * 0.7f );
 
 m_materials.m_Plastic.m_Shininess = 0.078125f * 128.0f;
 m_materials.m_Plastic.m_Emissive = SFVEC3F( 0.0f, 0.0f, 0.0f );
 OglSetMaterial( m_materials.m_Plastic, 1.0f );
 break;
 
 default:
 m_materials.m_Copper.m_Diffuse = m_boardAdapter.m_CopperColor;
 OglSetMaterial( m_materials.m_Copper, 1.0f );
 break;
 }
}
 
 
void init_lights()
{
 // Setup light
 // https://www.opengl.org/sdk/docs/man2/xhtml/glLight.xml
 const GLfloat ambient[] = { 0.084f, 0.084f, 0.084f, 1.0f };
 const GLfloat diffuse0[] = { 0.3f, 0.3f, 0.3f, 1.0f };
 const GLfloat specular0[] = { 0.5f, 0.5f, 0.5f, 1.0f };
 
 glLightfv( GL_LIGHT0, GL_AMBIENT, ambient );
 glLightfv( GL_LIGHT0, GL_DIFFUSE, diffuse0 );
 glLightfv( GL_LIGHT0, GL_SPECULAR, specular0 );
 
 const GLfloat diffuse12[] = { 0.7f, 0.7f, 0.7f, 1.0f };
 const GLfloat specular12[] = { 0.7f, 0.7f, 0.7f, 1.0f };
 
 // defines a directional light that points along the negative z-axis
 GLfloat position[4] = { 0.0f, 0.0f, 1.0f, 0.0f };
 
 // This makes a vector slight not perpendicular with XZ plane
 const SFVEC3F vectorLight = SphericalToCartesian( glm::pi<float>() * 0.03f,
 glm::pi<float>() * 0.25f );
 
 position[0] = vectorLight.x;
 position[1] = vectorLight.y;
 position[2] = vectorLight.z;
 
 glLightfv( GL_LIGHT1, GL_AMBIENT, ambient );
 glLightfv( GL_LIGHT1, GL_DIFFUSE, diffuse12 );
 glLightfv( GL_LIGHT1, GL_SPECULAR, specular12 );
 glLightfv( GL_LIGHT1, GL_POSITION, position );
 
 // defines a directional light that points along the positive z-axis
 position[2] = -position[2];
 
 glLightfv( GL_LIGHT2, GL_AMBIENT, ambient );
 glLightfv( GL_LIGHT2, GL_DIFFUSE, diffuse12 );
 glLightfv( GL_LIGHT2, GL_SPECULAR, specular12 );
 glLightfv( GL_LIGHT2, GL_POSITION, position );
 
 const GLfloat lmodel_ambient[] = { 0.0f, 0.0f, 0.0f, 1.0f };
 
 glLightModelfv( GL_LIGHT_MODEL_AMBIENT, lmodel_ambient );
 
 glLightModeli( GL_LIGHT_MODEL_TWO_SIDE, GL_FALSE );
}
 
 
void RENDER_3D_OPENGL::setCopperMaterial()
{
 OglSetMaterial( m_materials.m_NonPlatedCopper, 1.0f );
}
 
 
void RENDER_3D_OPENGL::setPlatedCopperAndDepthOffset( PCB_LAYER_ID aLayer_id )
{
 glEnable( GL_POLYGON_OFFSET_FILL );
 glPolygonOffset( -0.1f, -2.0f );
 setLayerMaterial( aLayer_id );
}
 
 
void RENDER_3D_OPENGL::unsetDepthOffset()
{
 glDisable( GL_POLYGON_OFFSET_FILL );
}
 
 
void RENDER_3D_OPENGL::renderBoardBody( bool aSkipRenderHoles )
{
 m_materials.m_EpoxyBoard.m_Diffuse = m_boardAdapter.m_BoardBodyColor;
 
 // opacity to transparency
 m_materials.m_EpoxyBoard.m_Transparency = 1.0f - m_boardAdapter.m_BoardBodyColor.a;
 
 OglSetMaterial( m_materials.m_EpoxyBoard, 1.0f );
 
 OPENGL_RENDER_LIST* ogl_disp_list = nullptr;
 
 if( aSkipRenderHoles )
 ogl_disp_list = m_board;
 else
 ogl_disp_list = m_boardWithHoles;
 
 if( ogl_disp_list )
 {
 ogl_disp_list->ApplyScalePosition( -m_boardAdapter.GetBoardBodyThickness() / 2.0f,
 m_boardAdapter.GetBoardBodyThickness() );
 
 ogl_disp_list->SetItIsTransparent( true );
 ogl_disp_list->DrawAll();
 }
}
 
 
static inline SFVEC4F premultiplyAlpha( const SFVEC4F& aInput )
{
 return SFVEC4F( aInput.r * aInput.a, aInput.g * aInput.a, aInput.b * aInput.a, aInput.a );
}
 
 
bool RENDER_3D_OPENGL::Redraw( bool aIsMoving, REPORTER* aStatusReporter,
 REPORTER* aWarningReporter )
{
 // Initialize OpenGL
 if( !m_canvasInitialized )
 {
 if( !initializeOpenGL() )
 return false;
 }
 
 EDA_3D_VIEWER_SETTINGS::RENDER_SETTINGS& cfg = m_boardAdapter.m_Cfg->m_Render;
 
 if( m_reloadRequested )
 {
 std::unique_ptr<BUSY_INDICATOR> busy = CreateBusyIndicator();
 
 if( aStatusReporter )
 aStatusReporter->Report( _( "Loading..." ) );
 
 reload( aStatusReporter, aWarningReporter );
 
 // generate a new 3D grid as the size of the board may had changed
 m_lastGridType = static_cast<GRID3D_TYPE>( cfg.grid_type );
 generate3dGrid( m_lastGridType );
 }
 else
 {
 // Check if grid was changed
 if( cfg.grid_type != m_lastGridType )
 {
 // and generate a new one
 m_lastGridType = static_cast<GRID3D_TYPE>( cfg.grid_type );
 generate3dGrid( m_lastGridType );
 }
 }
 
 setupMaterials();
 
 // Initial setup
 glDepthFunc( GL_LESS );
 glEnable( GL_CULL_FACE );
 glFrontFace( GL_CCW ); // This is the OpenGL default
 glEnable( GL_NORMALIZE ); // This allow OpenGL to normalize the normals after transformations
 glViewport( 0, 0, m_windowSize.x, m_windowSize.y );
 
 if( aIsMoving && cfg.opengl_AA_disableOnMove )
 glDisable( GL_MULTISAMPLE );
 else
 glEnable( GL_MULTISAMPLE );
 
 // clear color and depth buffers
 glClearColor( 0.0f, 0.0f, 0.0f, 0.0f );
 glClearDepth( 1.0f );
 glClearStencil( 0x00 );
 glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT );
 
 OglResetTextureState();
 
 // Draw the background ( rectangle with color gradient)
 OglDrawBackground( premultiplyAlpha( m_boardAdapter.m_BgColorTop ),
 premultiplyAlpha( m_boardAdapter.m_BgColorBot ) );
 
 glEnable( GL_DEPTH_TEST );
 
 // Set projection and modelview matrixes
 glMatrixMode( GL_PROJECTION );
 glLoadMatrixf( glm::value_ptr( m_camera.GetProjectionMatrix() ) );
 glMatrixMode( GL_MODELVIEW );
 glLoadIdentity();
 glLoadMatrixf( glm::value_ptr( m_camera.GetViewMatrix() ) );
 
 // Position the headlight
 setLightFront( true );
 setLightTop( true );
 setLightBottom( true );
 
 glEnable( GL_LIGHTING );
 
 {
 const SFVEC3F& cameraPos = m_camera.GetPos();
 
 // Place the light at a minimum Z so the diffuse factor will not drop
 // and the board will still look with good light.
 float zpos;
 
 if( cameraPos.z > 0.0f )
 zpos = glm::max( cameraPos.z, 0.5f ) + cameraPos.z * cameraPos.z;
 else
 zpos = glm::min( cameraPos.z,-0.5f ) - cameraPos.z * cameraPos.z;
 
 // This is a point light.
 const GLfloat headlight_pos[] = { cameraPos.x, cameraPos.y, zpos, 1.0f };
 
 glLightfv( GL_LIGHT0, GL_POSITION, headlight_pos );
 }
 
 bool skipThickness = aIsMoving && cfg.opengl_thickness_disableOnMove;
 bool skipRenderHoles = aIsMoving && cfg.opengl_holes_disableOnMove;
 bool skipRenderVias = aIsMoving && cfg.opengl_vias_disableOnMove;
 bool showThickness = !skipThickness;
 
 std::bitset<LAYER_3D_END> layerFlags = m_boardAdapter.GetVisibleLayers();
 
 setLayerMaterial( B_Cu );
 
 if( !( skipRenderVias || skipRenderHoles ) && m_vias )
 m_vias->DrawAll();
 
 if( !skipRenderHoles && m_padHoles )
 m_padHoles->DrawAll();
 
 // Display copper and tech layers
 for( MAP_OGL_DISP_LISTS::const_iterator ii = m_layers.begin(); ii != m_layers.end(); ++ii )
 {
 const PCB_LAYER_ID layer = ( PCB_LAYER_ID )( ii->first );
 bool isSilkLayer = layer == F_SilkS || layer == B_SilkS;
 bool isMaskLayer = layer == F_Mask || layer == B_Mask;
 bool isPasteLayer = layer == F_Paste || layer == B_Paste;
 bool isCopperLayer = layer >= F_Cu && layer <= B_Cu;
 
 // Mask layers are not processed here because they are a special case
 if( isMaskLayer )
 continue;
 
 // Do not show inner layers when it is displaying the board and board body is opaque
 // enough: the time to create inner layers can be *really significant*.
 // So avoid creating them is they are not very visible
 const double opacity_min = 0.8;
 
 if( layerFlags.test( LAYER_3D_BOARD ) && m_boardAdapter.m_BoardBodyColor.a > opacity_min )
 {
 if( layer > F_Cu && layer < B_Cu )
 continue;
 }
 
 glPushMatrix();
 
 OPENGL_RENDER_LIST* pLayerDispList = static_cast<OPENGL_RENDER_LIST*>( ii->second );
 
 if( isCopperLayer )
 {
 if( cfg.differentiate_plated_copper )
 setCopperMaterial();
 else
 setLayerMaterial( layer );
 
 OPENGL_RENDER_LIST* outerTH = nullptr;
 OPENGL_RENDER_LIST* viaHoles = nullptr;
 
 if( !skipRenderHoles )
 {
 outerTH = m_outerThroughHoles;
 viaHoles = m_outerLayerHoles[layer];
 }
 
 if( m_antiBoard )
 m_antiBoard->ApplyScalePosition( pLayerDispList );
 
 if( outerTH )
 outerTH->ApplyScalePosition( pLayerDispList );
 
 pLayerDispList->DrawCulled( showThickness, outerTH, viaHoles, m_antiBoard );
 
 // Draw plated & offboard pads
 if( layer == F_Cu && ( m_platedPadsFront || m_offboardPadsFront ) )
 {
 setPlatedCopperAndDepthOffset( layer );
 
 if( m_platedPadsFront )
 m_platedPadsFront->DrawCulled( showThickness, outerTH, viaHoles, m_antiBoard );
 
 if( m_offboardPadsFront )
 m_offboardPadsFront->DrawCulled( showThickness, outerTH, viaHoles );
 }
 else if( layer == B_Cu && ( m_platedPadsBack || m_offboardPadsBack ) )
 {
 setPlatedCopperAndDepthOffset( layer );
 
 if( m_platedPadsBack )
 m_platedPadsBack->DrawCulled( showThickness, outerTH, viaHoles, m_antiBoard );
 
 if( m_offboardPadsBack )
 m_offboardPadsBack->DrawCulled( showThickness, outerTH, viaHoles );
 }
 
 unsetDepthOffset();
 }
 else if( isPasteLayer && skipRenderHoles )
 {
 // Do not render paste layers when skipRenderHoles is enabled or we get z-fight issues
 }
 else
 {
 setLayerMaterial( layer );
 
 OPENGL_RENDER_LIST* throughHolesOuter = nullptr;
 OPENGL_RENDER_LIST* anti_board = nullptr;
 OPENGL_RENDER_LIST* solder_mask = nullptr;
 
 if( isSilkLayer && cfg.clip_silk_on_via_annuli )
 throughHolesOuter = m_outerThroughHoleRings;
 else
 throughHolesOuter = m_outerThroughHoles;
 
 if( isSilkLayer && cfg.show_off_board_silk )
 anti_board = nullptr;
 else if( LSET::PhysicalLayersMask().test( layer ) )
 anti_board = m_antiBoard;
 
 if( isSilkLayer && cfg.subtract_mask_from_silk && !cfg.show_off_board_silk )
 solder_mask = m_layers[ ( layer == B_SilkS) ? B_Mask : F_Mask ];
 
 if( throughHolesOuter )
 throughHolesOuter->ApplyScalePosition( pLayerDispList );
 
 if( anti_board )
 anti_board->ApplyScalePosition( pLayerDispList );
 
 if( solder_mask )
 solder_mask->ApplyScalePosition( pLayerDispList );
 
 pLayerDispList->DrawCulled( showThickness, solder_mask, throughHolesOuter, anti_board );
 }
 
 glPopMatrix();
 }
 
 glm::mat4 cameraViewMatrix;
 
 glGetFloatv( GL_MODELVIEW_MATRIX, glm::value_ptr( cameraViewMatrix ) );
 
 // Render 3D Models (Non-transparent)
 renderOpaqueModels( cameraViewMatrix );
 
 // Display board body
 if( layerFlags.test( LAYER_3D_BOARD ) )
 renderBoardBody( skipRenderHoles );
 
 // Display transparent mask layers
 if( layerFlags.test( LAYER_3D_SOLDERMASK_TOP ) || layerFlags.test( LAYER_3D_SOLDERMASK_BOTTOM ) )
 {
 // add a depth buffer offset, it will help to hide some artifacts
 // on silkscreen where the SolderMask is removed
 glEnable( GL_POLYGON_OFFSET_FILL );
 glPolygonOffset( 0.0f, -2.0f );
 
 if( m_camera.GetPos().z > 0 )
 {
 if( layerFlags.test( LAYER_3D_SOLDERMASK_BOTTOM ) )
 {
 renderSolderMaskLayer( B_Mask, m_boardAdapter.GetLayerTopZPos( B_Mask ),
 showThickness, skipRenderHoles );
 }
 
 if( layerFlags.test( LAYER_3D_SOLDERMASK_TOP ) )
 {
 renderSolderMaskLayer( F_Mask, m_boardAdapter.GetLayerBottomZPos( F_Mask ),
 showThickness, skipRenderHoles );
 }
 }
 else
 {
 if( layerFlags.test( LAYER_3D_SOLDERMASK_TOP ) )
 {
 renderSolderMaskLayer( F_Mask, m_boardAdapter.GetLayerBottomZPos( F_Mask ),
 showThickness, skipRenderHoles );
 }
 
 if( layerFlags.test( LAYER_3D_SOLDERMASK_BOTTOM ) )
 {
 renderSolderMaskLayer( B_Mask, m_boardAdapter.GetLayerTopZPos( B_Mask ),
 showThickness, skipRenderHoles );
 }
 }
 
 glDisable( GL_POLYGON_OFFSET_FILL );
 glPolygonOffset( 0.0f, 0.0f );
 }
 
 // Render 3D Models (Transparent)
 // !TODO: this can be optimized. If there are no transparent models (or no opacity),
 // then there is no need to make this function call.
 glDepthMask( GL_FALSE );
 glEnable( GL_BLEND );
 glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
 
 // Enables Texture Env so it can combine model transparency with each footprint opacity
 glEnable( GL_TEXTURE_2D );
 glActiveTexture( GL_TEXTURE0 );
 glBindTexture( GL_TEXTURE_2D, m_circleTexture ); // Uses an existent texture so the glTexEnv operations will work
 
 glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE );
 glTexEnvf( GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_INTERPOLATE );
 glTexEnvf( GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_MODULATE );
 
 glTexEnvi( GL_TEXTURE_ENV, GL_SRC0_RGB, GL_PRIMARY_COLOR );
 glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR );
 
 glTexEnvi( GL_TEXTURE_ENV, GL_SRC1_RGB, GL_PREVIOUS );
 glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR );
 
 glTexEnvi( GL_TEXTURE_ENV, GL_SRC0_ALPHA, GL_PRIMARY_COLOR );
 glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA );
 glTexEnvi( GL_TEXTURE_ENV, GL_SRC1_ALPHA, GL_CONSTANT );
 glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND1_ALPHA, GL_SRC_ALPHA );
 
 renderTransparentModels( cameraViewMatrix );
 
 glDisable( GL_BLEND );
 OglResetTextureState();
 
 glDepthMask( GL_TRUE );
 
 // Render Grid
 if( cfg.grid_type != GRID3D_TYPE::NONE )
 {
 glDisable( GL_LIGHTING );
 
 if( glIsList( m_grid ) )
 glCallList( m_grid );
 
 glEnable( GL_LIGHTING );
 }
 
 // Render 3D arrows
 if( cfg.show_axis )
 render3dArrows();
 
 // Return back to the original viewport (this is important if we want
 // to take a screenshot after the render)
 glViewport( 0, 0, m_windowSize.x, m_windowSize.y );
 
 return false;
}
 
 
bool RENDER_3D_OPENGL::initializeOpenGL()
{
 glEnable( GL_LINE_SMOOTH );
 glShadeModel( GL_SMOOTH );
 
 // 4-byte pixel alignment
 glPixelStorei( GL_UNPACK_ALIGNMENT, 4 );
 
 // Initialize the open GL texture to draw the filled semi-circle of the segments
 IMAGE* circleImage = new IMAGE( SIZE_OF_CIRCLE_TEXTURE, SIZE_OF_CIRCLE_TEXTURE );
 
 if( !circleImage )
 return false;
 
 unsigned int circleRadius = ( SIZE_OF_CIRCLE_TEXTURE / 2 ) - 4;
 
 circleImage->CircleFilled( ( SIZE_OF_CIRCLE_TEXTURE / 2 ) - 0,
 ( SIZE_OF_CIRCLE_TEXTURE / 2 ) - 0,
 circleRadius,
 0xFF );
 
 IMAGE* circleImageBlured = new IMAGE( circleImage->GetWidth(), circleImage->GetHeight() );
 
 circleImageBlured->EfxFilter_SkipCenter( circleImage, IMAGE_FILTER::GAUSSIAN_BLUR, circleRadius - 8 );
 
 m_circleTexture = OglLoadTexture( *circleImageBlured );
 
 delete circleImageBlured;
 circleImageBlured = nullptr;
 
 delete circleImage;
 circleImage = nullptr;
 
 init_lights();
 
 // Use this mode if you want see the triangle lines (debug proposes)
 //glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
 m_canvasInitialized = true;
 
 return true;
}
 
 
void RENDER_3D_OPENGL::setArrowMaterial()
{
 glEnable( GL_COLOR_MATERIAL );
 glColorMaterial( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE );
 
 const SFVEC4F ambient = SFVEC4F( 0.0f, 0.0f, 0.0f, 1.0f );
 const SFVEC4F diffuse = SFVEC4F( 0.0f, 0.0f, 0.0f, 1.0f );
 const SFVEC4F emissive = SFVEC4F( 0.0f, 0.0f, 0.0f, 1.0f );
 const SFVEC4F specular = SFVEC4F( 0.1f, 0.1f, 0.1f, 1.0f );
 
 glMaterialfv( GL_FRONT_AND_BACK, GL_SPECULAR, &specular.r );
 glMaterialf( GL_FRONT_AND_BACK, GL_SHININESS, 96.0f );
 
 glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT, &ambient.r );
 glMaterialfv( GL_FRONT_AND_BACK, GL_DIFFUSE, &diffuse.r );
 glMaterialfv( GL_FRONT_AND_BACK, GL_EMISSION, &emissive.r );
}
 
 
void RENDER_3D_OPENGL::freeAllLists()
{
#define DELETE_AND_FREE( ptr ) \
 { \
 delete ptr; \
 ptr = nullptr; \
 } \
 
#define DELETE_AND_FREE_MAP( map ) \
 { \
 for( auto& [ layer, ptr ] : map ) \
 delete ptr; \
 \
 map.clear(); \
 }
 
 if( glIsList( m_grid ) )
 glDeleteLists( m_grid, 1 );
 
 m_grid = 0;
 
 DELETE_AND_FREE_MAP( m_layers )
 
 DELETE_AND_FREE( m_platedPadsFront )
 DELETE_AND_FREE( m_platedPadsBack )
 DELETE_AND_FREE( m_offboardPadsFront )
 DELETE_AND_FREE( m_offboardPadsBack )
 
 DELETE_AND_FREE_MAP( m_outerLayerHoles )
 DELETE_AND_FREE_MAP( m_innerLayerHoles )
 
 for( TRIANGLE_DISPLAY_LIST* list : m_triangles )
 delete list;
 
 m_triangles.clear();
 
 DELETE_AND_FREE_MAP( m_3dModelMap )
 
 m_3dModelMatrixMap.clear();
 
 DELETE_AND_FREE( m_board )
 DELETE_AND_FREE( m_boardWithHoles )
 DELETE_AND_FREE( m_antiBoard )
 
 DELETE_AND_FREE( m_outerThroughHoles )
 DELETE_AND_FREE( m_outerViaThroughHoles )
 DELETE_AND_FREE( m_outerThroughHoleRings )
 
 DELETE_AND_FREE( m_vias )
 DELETE_AND_FREE( m_padHoles )
}
 
 
void RENDER_3D_OPENGL::renderSolderMaskLayer( PCB_LAYER_ID aLayerID, float aZPos,
 bool aShowThickness, bool aSkipRenderHoles )
{
 wxASSERT( (aLayerID == B_Mask) || (aLayerID == F_Mask) );
 
 if( m_board )
 {
 OPENGL_RENDER_LIST* solder_mask = m_layers[ aLayerID ];
 OPENGL_RENDER_LIST* via_holes = aSkipRenderHoles ? nullptr : m_outerThroughHoles;
 
 if( via_holes )
 via_holes->ApplyScalePosition( aZPos, m_boardAdapter.GetNonCopperLayerThickness() );
 
 m_board->ApplyScalePosition( aZPos, m_boardAdapter.GetNonCopperLayerThickness() );
 
 setLayerMaterial( aLayerID );
 m_board->SetItIsTransparent( true );
 m_board->DrawCulled( aShowThickness, solder_mask, via_holes );
 }
}
 
 
void RENDER_3D_OPENGL::get3dModelsSelected( std::list<MODELTORENDER> &aDstRenderList, bool aGetTop,
 bool aGetBot, bool aRenderTransparentOnly,
 bool aRenderSelectedOnly )
{
 wxASSERT( ( aGetTop == true ) || ( aGetBot == true ) );
 
 if( !m_boardAdapter.GetBoard() )
 return;
 
 EDA_3D_VIEWER_SETTINGS::RENDER_SETTINGS& cfg = m_boardAdapter.m_Cfg->m_Render;
 
 // Go for all footprints
 for( FOOTPRINT* fp : m_boardAdapter.GetBoard()->Footprints() )
 {
 bool highlight = false;
 
 if( m_boardAdapter.m_IsBoardView )
 {
 if( fp->IsSelected() )
 highlight = true;
 
 if( cfg.highlight_on_rollover && fp == m_currentRollOverItem )
 highlight = true;
 
 if( aRenderSelectedOnly != highlight )
 continue;
 }
 
 if( !fp->Models().empty() )
 {
 if( m_boardAdapter.IsFootprintShown( (FOOTPRINT_ATTR_T) fp->GetAttributes() ) )
 {
 const bool isFlipped = fp->IsFlipped();
 
 if( aGetTop == !isFlipped || aGetBot == isFlipped )
 get3dModelsFromFootprint( aDstRenderList, fp, aRenderTransparentOnly, highlight );
 }
 }
 }
}
 
 
void RENDER_3D_OPENGL::get3dModelsFromFootprint( std::list<MODELTORENDER> &aDstRenderList,
 const FOOTPRINT* aFootprint,
 bool aRenderTransparentOnly, bool aIsSelected )
{
 if( !aFootprint->Models().empty() )
 {
 const double zpos = m_boardAdapter.GetFootprintZPos( aFootprint->IsFlipped() );
 
 VECTOR2I pos = aFootprint->GetPosition();
 
 glm::mat4 fpMatrix( 1.0f );
 
 fpMatrix = glm::translate( fpMatrix, SFVEC3F( pos.x * m_boardAdapter.BiuTo3dUnits(),
 -pos.y * m_boardAdapter.BiuTo3dUnits(),
 zpos ) );
 
 if( !aFootprint->GetOrientation().IsZero() )
 {
 fpMatrix = glm::rotate( fpMatrix, (float) aFootprint->GetOrientation().AsRadians(),
 SFVEC3F( 0.0f, 0.0f, 1.0f ) );
 }
 
 if( aFootprint->IsFlipped() )
 {
 fpMatrix = glm::rotate( fpMatrix, glm::pi<float>(), SFVEC3F( 0.0f, 1.0f, 0.0f ) );
 fpMatrix = glm::rotate( fpMatrix, glm::pi<float>(), SFVEC3F( 0.0f, 0.0f, 1.0f ) );
 }
 
 double modelunit_to_3d_units_factor = m_boardAdapter.BiuTo3dUnits() * UNITS3D_TO_UNITSPCB;
 
 fpMatrix = glm::scale( fpMatrix, SFVEC3F( modelunit_to_3d_units_factor ) );
 
 // Get the list of model files for this model
 for( const FP_3DMODEL& sM : aFootprint->Models() )
 {
 if( !sM.m_Show || sM.m_Filename.empty() )
 continue;
 
 // Check if the model is present in our cache map
 auto cache_i = m_3dModelMap.find( sM.m_Filename );
 
 if( cache_i == m_3dModelMap.end() )
 continue;
 
 if( const MODEL_3D* modelPtr = cache_i->second )
 {
 bool opaque = sM.m_Opacity >= 1.0;
 
 if( ( !aRenderTransparentOnly && modelPtr->HasOpaqueMeshes() && opaque ) ||
 ( aRenderTransparentOnly && ( modelPtr->HasTransparentMeshes() || !opaque ) ) )
 {
 glm::mat4 modelworldMatrix = fpMatrix;
 
 const SFVEC3F offset = SFVEC3F( sM.m_Offset.x, sM.m_Offset.y, sM.m_Offset.z );
 const SFVEC3F rotation = SFVEC3F( sM.m_Rotation.x, sM.m_Rotation.y, sM.m_Rotation.z );
 const SFVEC3F scale = SFVEC3F( sM.m_Scale.x, sM.m_Scale.y, sM.m_Scale.z );
 
 std::vector<float> key = { offset.x, offset.y, offset.z,
 rotation.x, rotation.y, rotation.z,
 scale.x, scale.y, scale.z };
 
 auto it = m_3dModelMatrixMap.find( key );
 
 if( it != m_3dModelMatrixMap.end() )
 {
 modelworldMatrix *= it->second;
 }
 else
 {
 glm::mat4 mtx( 1.0f );
 mtx = glm::translate( mtx, offset );
 mtx = glm::rotate( mtx, glm::radians( -rotation.z ), { 0.0f, 0.0f, 1.0f } );
 mtx = glm::rotate( mtx, glm::radians( -rotation.y ), { 0.0f, 1.0f, 0.0f } );
 mtx = glm::rotate( mtx, glm::radians( -rotation.x ), { 1.0f, 0.0f, 0.0f } );
 mtx = glm::scale( mtx, scale );
 m_3dModelMatrixMap[ key ] = mtx;
 
 modelworldMatrix *= mtx;
 }
 
 aDstRenderList.emplace_back( modelworldMatrix, modelPtr,
 aRenderTransparentOnly ? sM.m_Opacity : 1.0f,
 aRenderTransparentOnly,
 aFootprint->IsSelected() || aIsSelected );
 }
 }
 }
 }
}
 
 
void RENDER_3D_OPENGL::renderOpaqueModels( const glm::mat4 &aCameraViewMatrix )
{
 EDA_3D_VIEWER_SETTINGS::RENDER_SETTINGS& cfg = m_boardAdapter.m_Cfg->m_Render;
 
 const SFVEC3F selColor = m_boardAdapter.GetColor( cfg.opengl_selection_color );
 
 glPushMatrix();
 
 std::list<MODELTORENDER> renderList;
 
 if( m_boardAdapter.m_IsBoardView )
 {
 renderList.clear();
 
 get3dModelsSelected( renderList, true, true, false, true );
 
 if( !renderList.empty() )
 {
 MODEL_3D::BeginDrawMulti( false );
 
 for( const MODELTORENDER& mtr : renderList )
 renderModel( aCameraViewMatrix, mtr, selColor, nullptr );
 
 MODEL_3D::EndDrawMulti();
 }
 }
 
 renderList.clear();
 get3dModelsSelected( renderList, true, true, false, false );
 
 if( !renderList.empty() )
 {
 MODEL_3D::BeginDrawMulti( true );
 
 for( const MODELTORENDER& mtr : renderList )
 renderModel( aCameraViewMatrix, mtr, selColor, nullptr );
 
 MODEL_3D::EndDrawMulti();
 }
 
 glPopMatrix();
}
 
 
void RENDER_3D_OPENGL::renderTransparentModels( const glm::mat4 &aCameraViewMatrix )
{
 EDA_3D_VIEWER_SETTINGS::RENDER_SETTINGS& cfg = m_boardAdapter.m_Cfg->m_Render;
 
 const SFVEC3F selColor = m_boardAdapter.GetColor( cfg.opengl_selection_color );
 
 std::list<MODELTORENDER> renderListModels; // do not clear it until this function returns
 
 if( m_boardAdapter.m_IsBoardView )
 {
 // Get Transparent Selected
 get3dModelsSelected( renderListModels, true, true, true, true );
 }
 
 // Get Transparent Not Selected
 get3dModelsSelected( renderListModels, true, true, true, false );
 
 if( renderListModels.empty() )
 return;
 
 std::vector<std::pair<const MODELTORENDER *, float>> transparentModelList;
 
 transparentModelList.reserve( renderListModels.size() );
 
 // Calculate the distance to the camera for each model
 const SFVEC3F &cameraPos = m_camera.GetPos();
 
 for( const MODELTORENDER& mtr : renderListModels )
 {
 const BBOX_3D& bBox = mtr.m_model->GetBBox();
 const SFVEC3F& bBoxCenter = bBox.GetCenter();
 const SFVEC3F bBoxWorld = mtr.m_modelWorldMat * glm::vec4( bBoxCenter, 1.0f );
 
 const float distanceToCamera = glm::length( cameraPos - bBoxWorld );
 
 transparentModelList.emplace_back( &mtr, distanceToCamera );
 }
 
 // Sort from back to front
 std::sort( transparentModelList.begin(), transparentModelList.end(),
 [&]( std::pair<const MODELTORENDER *, float>& a,
 std::pair<const MODELTORENDER *, float>& b )
 {
 if( a.second != b.second )
 return a.second > b.second;
 
 return a.first > b.first; // use pointers as a last resort
 } );
 
 // Start rendering calls
 glPushMatrix();
 
 bool isUsingColorInformation = !( transparentModelList.begin()->first->m_isSelected &&
 m_boardAdapter.m_IsBoardView );
 
 MODEL_3D::BeginDrawMulti( isUsingColorInformation );
 
 for( const std::pair<const MODELTORENDER *, float>& mtr : transparentModelList )
 {
 if( m_boardAdapter.m_IsBoardView )
 {
 // Toggle between using model color or the select color
 if( !isUsingColorInformation && !mtr.first->m_isSelected )
 {
 isUsingColorInformation = true;
 
 glEnableClientState( GL_COLOR_ARRAY );
 glEnableClientState( GL_TEXTURE_COORD_ARRAY );
 glEnable( GL_COLOR_MATERIAL );
 }
 else if( isUsingColorInformation && mtr.first->m_isSelected )
 {
 isUsingColorInformation = false;
 
 glDisableClientState( GL_COLOR_ARRAY );
 glDisableClientState( GL_TEXTURE_COORD_ARRAY );
 glDisable( GL_COLOR_MATERIAL );
 }
 }
 
 // Render model, sort each individuall material group
 // by passing cameraPos
 renderModel( aCameraViewMatrix, *mtr.first, selColor, &cameraPos );
 }
 
 MODEL_3D::EndDrawMulti();
 
 glPopMatrix();
}
 
 
void RENDER_3D_OPENGL::renderModel( const glm::mat4 &aCameraViewMatrix,
 const MODELTORENDER &aModelToRender,
 const SFVEC3F &aSelColor, const SFVEC3F *aCameraWorldPos )
{
 EDA_3D_VIEWER_SETTINGS::RENDER_SETTINGS& cfg = m_boardAdapter.m_Cfg->m_Render;
 
 const glm::mat4 modelviewMatrix = aCameraViewMatrix * aModelToRender.m_modelWorldMat;
 
 glLoadMatrixf( glm::value_ptr( modelviewMatrix ) );
 
 aModelToRender.m_model->Draw( aModelToRender.m_isTransparent, aModelToRender.m_opacity,
 aModelToRender.m_isSelected, aSelColor,
 &aModelToRender.m_modelWorldMat, aCameraWorldPos );
 
 if( cfg.show_model_bbox )
 {
 const bool wasBlendEnabled = glIsEnabled( GL_BLEND );
 
 if( !wasBlendEnabled )
 {
 glEnable( GL_BLEND );
 glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
 }
 
 glDisable( GL_LIGHTING );
 
 glLineWidth( 1 );
 aModelToRender.m_model->DrawBboxes();
 
 glLineWidth( 4 );
 aModelToRender.m_model->DrawBbox();
 
 glEnable( GL_LIGHTING );
 
 if( !wasBlendEnabled )
 glDisable( GL_BLEND );
 }
}
 
 
void RENDER_3D_OPENGL::generate3dGrid( GRID3D_TYPE aGridType )
{
 if( glIsList( m_grid ) )
 glDeleteLists( m_grid, 1 );
 
 m_grid = 0;
 
 if( aGridType == GRID3D_TYPE::NONE )
 return;
 
 m_grid = glGenLists( 1 );
 
 if( !glIsList( m_grid ) )
 return;
 
 glNewList( m_grid, GL_COMPILE );
 
 glEnable( GL_BLEND );
 glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
 
 const double zpos = 0.0;
 
 // Color of grid lines
 const SFVEC3F gridColor = m_boardAdapter.GetColor( DARKGRAY );
 
 // Color of grid lines every 5 lines
 const SFVEC3F gridColor_marker = m_boardAdapter.GetColor( LIGHTBLUE );
 const double scale = m_boardAdapter.BiuTo3dUnits();
 const GLfloat transparency = 0.35f;
 
 double griSizeMM = 0.0;
 
 switch( aGridType )
 {
 case GRID3D_TYPE::GRID_1MM: griSizeMM = 1.0; break;
 case GRID3D_TYPE::GRID_2P5MM: griSizeMM = 2.5; break;
 case GRID3D_TYPE::GRID_5MM: griSizeMM = 5.0; break;
 case GRID3D_TYPE::GRID_10MM: griSizeMM = 10.0; break;
 
 default:
 case GRID3D_TYPE::NONE: return;
 }
 
 glNormal3f( 0.0, 0.0, 1.0 );
 
 const VECTOR2I brd_size = m_boardAdapter.GetBoardSize();
 VECTOR2I brd_center_pos = m_boardAdapter.GetBoardPos();
 
 brd_center_pos.y = -brd_center_pos.y;
 
 const int xsize = std::max( brd_size.x, pcbIUScale.mmToIU( 100 ) ) * 1.2;
 const int ysize = std::max( brd_size.y, pcbIUScale.mmToIU( 100 ) ) * 1.2;
 
 // Grid limits, in 3D units
 double xmin = ( brd_center_pos.x - xsize / 2 ) * scale;
 double xmax = ( brd_center_pos.x + xsize / 2 ) * scale;
 double ymin = ( brd_center_pos.y - ysize / 2 ) * scale;
 double ymax = ( brd_center_pos.y + ysize / 2 ) * scale;
 double zmin = pcbIUScale.mmToIU( -50 ) * scale;
 double zmax = pcbIUScale.mmToIU( 100 ) * scale;
 
 // Set rasterised line width (min value = 1)
 glLineWidth( 1 );
 
 // Draw horizontal grid centered on 3D origin (center of the board)
 for( int ii = 0; ; ii++ )
 {
 if( (ii % 5) )
 glColor4f( gridColor.r, gridColor.g, gridColor.b, transparency );
 else
 glColor4f( gridColor_marker.r, gridColor_marker.g, gridColor_marker.b,
 transparency );
 
 const int delta = KiROUND( ii * griSizeMM * pcbIUScale.IU_PER_MM );
 
 if( delta <= xsize / 2 ) // Draw grid lines parallel to X axis
 {
 glBegin( GL_LINES );
 glVertex3f( (brd_center_pos.x + delta) * scale, -ymin, zpos );
 glVertex3f( (brd_center_pos.x + delta) * scale, -ymax, zpos );
 glEnd();
 
 if( ii != 0 )
 {
 glBegin( GL_LINES );
 glVertex3f( (brd_center_pos.x - delta) * scale, -ymin, zpos );
 glVertex3f( (brd_center_pos.x - delta) * scale, -ymax, zpos );
 glEnd();
 }
 }
 
 if( delta <= ysize / 2 ) // Draw grid lines parallel to Y axis
 {
 glBegin( GL_LINES );
 glVertex3f( xmin, -( brd_center_pos.y + delta ) * scale, zpos );
 glVertex3f( xmax, -( brd_center_pos.y + delta ) * scale, zpos );
 glEnd();
 
 if( ii != 0 )
 {
 glBegin( GL_LINES );
 glVertex3f( xmin, -( brd_center_pos.y - delta ) * scale, zpos );
 glVertex3f( xmax, -( brd_center_pos.y - delta ) * scale, zpos );
 glEnd();
 }
 }
 
 if( ( delta > ysize / 2 ) && ( delta > xsize / 2 ) )
 break;
 }
 
 // Draw vertical grid on Z axis
 glNormal3f( 0.0, -1.0, 0.0 );
 
 // Draw vertical grid lines (parallel to Z axis)
 double posy = -brd_center_pos.y * scale;
 
 for( int ii = 0; ; ii++ )
 {
 if( (ii % 5) )
 glColor4f( gridColor.r, gridColor.g, gridColor.b, transparency );
 else
 glColor4f( gridColor_marker.r, gridColor_marker.g, gridColor_marker.b,
 transparency );
 
 const double delta = ii * griSizeMM * pcbIUScale.IU_PER_MM;
 
 glBegin( GL_LINES );
 xmax = ( brd_center_pos.x + delta ) * scale;
 
 glVertex3f( xmax, posy, zmin );
 glVertex3f( xmax, posy, zmax );
 glEnd();
 
 if( ii != 0 )
 {
 glBegin( GL_LINES );
 xmin = ( brd_center_pos.x - delta ) * scale;
 glVertex3f( xmin, posy, zmin );
 glVertex3f( xmin, posy, zmax );
 glEnd();
 }
 
 if( delta > xsize / 2.0f )
 break;
 }
 
 // Draw horizontal grid lines on Z axis (parallel to X axis)
 for( int ii = 0; ; ii++ )
 {
 if( ii % 5 )
 glColor4f( gridColor.r, gridColor.g, gridColor.b, transparency );
 else
 glColor4f( gridColor_marker.r, gridColor_marker.g, gridColor_marker.b, transparency );
 
 const double delta = ii * griSizeMM * pcbIUScale.IU_PER_MM * scale;
 
 if( delta <= zmax )
 {
 // Draw grid lines on Z axis (positive Z axis coordinates)
 glBegin( GL_LINES );
 glVertex3f( xmin, posy, delta );
 glVertex3f( xmax, posy, delta );
 glEnd();
 }
 
 if( delta <= -zmin && ( ii != 0 ) )
 {
 // Draw grid lines on Z axis (negative Z axis coordinates)
 glBegin( GL_LINES );
 glVertex3f( xmin, posy, -delta );
 glVertex3f( xmax, posy, -delta );
 glEnd();
 }
 
 if( ( delta > zmax ) && ( delta > -zmin ) )
 break;
 }
 
 glDisable( GL_BLEND );
 
 glEndList();
}