eda_3d_model_viewer.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) 1992-2021 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 <iostream>
#include "3d_rendering/opengl/3d_model.h"
#include "eda_3d_model_viewer.h"
#include "../3d_rendering/opengl/opengl_utils.h"
#include "../3d_cache/3d_cache.h"
#include <wx/dcclient.h>
#include <base_units.h>
#include <gl_context_mgr.h>
#include <settings/common_settings.h>
#include <pgm_base.h>
#include <gal/dpi_scaling.h>

#define UNITS3D_TO_UNITSPCB (IU_PER_MM)

const wxChar* EDA_3D_MODEL_VIEWER::m_logTrace = wxT( "KI_TRACE_EDA_3D_MODEL_VIEWER" );


BEGIN_EVENT_TABLE( EDA_3D_MODEL_VIEWER, wxGLCanvas )
 EVT_PAINT( EDA_3D_MODEL_VIEWER::OnPaint )

 // mouse events
 EVT_LEFT_DOWN( EDA_3D_MODEL_VIEWER::OnLeftDown )
 EVT_LEFT_UP( EDA_3D_MODEL_VIEWER::OnLeftUp )
 EVT_MIDDLE_UP( EDA_3D_MODEL_VIEWER::OnMiddleUp )
 EVT_MIDDLE_DOWN( EDA_3D_MODEL_VIEWER::OnMiddleDown)
 EVT_RIGHT_DOWN( EDA_3D_MODEL_VIEWER::OnRightClick )
 EVT_MOUSEWHEEL( EDA_3D_MODEL_VIEWER::OnMouseWheel )
 EVT_MOTION( EDA_3D_MODEL_VIEWER::OnMouseMove )

#ifdef USE_OSX_MAGNIFY_EVENT
 EVT_MAGNIFY( EDA_3D_MODEL_VIEWER::OnMagnify )
#endif

 // other events
 EVT_ERASE_BACKGROUND( EDA_3D_MODEL_VIEWER::OnEraseBackground )
END_EVENT_TABLE()


// This defines the range that all coord will have to be rendered.
// It will use this value to convert to a normalized value between
// -(RANGE_SCALE_3D/2) .. +(RANGE_SCALE_3D/2)
#define RANGE_SCALE_3D 8.0f


EDA_3D_MODEL_VIEWER::EDA_3D_MODEL_VIEWER( wxWindow* aParent, const int* aAttribList,
 S3D_CACHE* aCacheManager ) :
 HIDPI_GL_CANVAS( aParent, wxID_ANY, aAttribList, wxDefaultPosition, wxDefaultSize,
 wxFULL_REPAINT_ON_RESIZE ),
 m_trackBallCamera( RANGE_SCALE_3D * 4.0f ),
 m_cacheManager( aCacheManager )
{
 wxLogTrace( m_logTrace, wxT( "EDA_3D_MODEL_VIEWER::EDA_3D_MODEL_VIEWER" ) );

 m_ogl_initialized = false;
 m_reload_is_needed = false;
 m_ogl_3dmodel = nullptr;
 m_3d_model = nullptr;
 m_BiuTo3dUnits = 1.0;

 m_glRC = nullptr;

 COMMON_SETTINGS* settings = Pgm().GetCommonSettings();

 const DPI_SCALING dpi{ settings, this };
 SetScaleFactor( dpi.GetScaleFactor() );
}


EDA_3D_MODEL_VIEWER::~EDA_3D_MODEL_VIEWER()
{
 wxLogTrace( m_logTrace, wxT( "EDA_3D_MODEL_VIEWER::~EDA_3D_MODEL_VIEWER" ) );

 if( m_glRC )
 {
 GL_CONTEXT_MANAGER::Get().LockCtx( m_glRC, this );

 delete m_ogl_3dmodel;
 m_ogl_3dmodel = nullptr;

 GL_CONTEXT_MANAGER::Get().UnlockCtx( m_glRC );
 GL_CONTEXT_MANAGER::Get().DestroyCtx( m_glRC );
 }
}


void EDA_3D_MODEL_VIEWER::Set3DModel( const S3DMODEL& a3DModel )
{
 wxLogTrace( m_logTrace, wxT( "EDA_3D_MODEL_VIEWER::Set3DModel with a S3DMODEL" ) );

 // Validate a3DModel pointers
 wxASSERT( a3DModel.m_Materials != nullptr );
 wxASSERT( a3DModel.m_Meshes != nullptr );
 wxASSERT( a3DModel.m_MaterialsSize > 0 );
 wxASSERT( a3DModel.m_MeshesSize > 0 );

 // Delete the old model
 delete m_ogl_3dmodel;
 m_ogl_3dmodel = nullptr;

 m_3d_model = nullptr;

 if( ( a3DModel.m_Materials != nullptr ) && ( a3DModel.m_Meshes != nullptr )
 && ( a3DModel.m_MaterialsSize > 0 ) && ( a3DModel.m_MeshesSize > 0 ) )
 {
 m_3d_model = &a3DModel;
 m_reload_is_needed = true;
 }

 Refresh();
}


void EDA_3D_MODEL_VIEWER::Set3DModel( const wxString& aModelPathName)
{
 wxLogTrace( m_logTrace, wxT( "EDA_3D_MODEL_VIEWER::Set3DModel with a wxString" ) );

 if( m_cacheManager )
 {
 const S3DMODEL* model = m_cacheManager->GetModel( aModelPathName );

 if( model )
 Set3DModel( (const S3DMODEL &)*model );
 else
 Clear3DModel();
 }
}


void EDA_3D_MODEL_VIEWER::Clear3DModel()
{
 // Delete the old model
 m_reload_is_needed = false;

 delete m_ogl_3dmodel;
 m_ogl_3dmodel = nullptr;

 m_3d_model = nullptr;

 Refresh();
}


void EDA_3D_MODEL_VIEWER::ogl_initialize()
{
 glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST );
 glHint( GL_LINE_SMOOTH_HINT, GL_NICEST );
 glHint( GL_POLYGON_SMOOTH_HINT, GL_NICEST );

 glPolygonMode( GL_FRONT_AND_BACK, GL_FILL );
 glEnable( GL_DEPTH_TEST );
 glEnable( GL_CULL_FACE );
 glShadeModel( GL_SMOOTH );
 glEnable( GL_LINE_SMOOTH );
 glEnable( GL_NORMALIZE );

 // Setup light
 // https://www.opengl.org/sdk/docs/man2/xhtml/glLight.xml
 const GLfloat ambient[] = { 0.01f, 0.01f, 0.01f, 1.0f };
 const GLfloat diffuse[] = { 1.0f, 1.0f, 1.0f, 1.0f };
 const GLfloat specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };

 // defines a directional light that points along the negative z-axis
 const GLfloat position[] = { 0.0f, 0.0f, 2.0f * RANGE_SCALE_3D, 0.0f };

 const GLfloat lmodel_ambient[] = { 0.0f, 0.0f, 0.0f, 1.0f };

 glLightfv( GL_LIGHT0, GL_AMBIENT, ambient );
 glLightfv( GL_LIGHT0, GL_DIFFUSE, diffuse );
 glLightfv( GL_LIGHT0, GL_SPECULAR, specular );
 glLightfv( GL_LIGHT0, GL_POSITION, position );
 glLightModelfv( GL_LIGHT_MODEL_AMBIENT, lmodel_ambient );
}


void EDA_3D_MODEL_VIEWER::ogl_set_arrow_material()
{
 glEnable( GL_COLOR_MATERIAL );
 glColorMaterial( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE );

 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 );
}


void EDA_3D_MODEL_VIEWER::OnPaint( wxPaintEvent& event )
{
 event.Skip( false );

 // SwapBuffer requires the window to be shown before calling
 if( !IsShownOnScreen() )
 {
 wxLogTrace( m_logTrace, wxT( "EDA_3D_MODEL_VIEWER::OnPaint !IsShown" ) );
 return;
 }

 // "Makes the OpenGL state that is represented by the OpenGL rendering
 // context context current, i.e. it will be used by all subsequent OpenGL calls.
 // This function may only be called when the window is shown on screen"
 if( m_glRC == nullptr )
 m_glRC = GL_CONTEXT_MANAGER::Get().CreateCtx( this );

 GL_CONTEXT_MANAGER::Get().LockCtx( m_glRC, this );

 // Set the OpenGL viewport according to the client size of this canvas.
 // This is done here rather than in a wxSizeEvent handler because our
 // OpenGL rendering context (and thus viewport setting) is used with
 // multiple canvases: If we updated the viewport in the wxSizeEvent
 // handler, changing the size of one canvas causes a viewport setting that
 // is wrong when next another canvas is repainted.
 wxSize clientSize = GetNativePixelSize();

 if( !m_ogl_initialized )
 {
 m_ogl_initialized = true;
 ogl_initialize();
 }

 if( m_reload_is_needed )
 {
 wxLogTrace( m_logTrace, wxT( "EDA_3D_MODEL_VIEWER::OnPaint m_reload_is_needed" ) );

 m_reload_is_needed = false;
 m_ogl_3dmodel = new MODEL_3D( *m_3d_model, MATERIAL_MODE::NORMAL );

 // It convert a model as it was a board, so get the max size dimension of the board
 // and compute the conversion scale
 m_BiuTo3dUnits =
 (double) RANGE_SCALE_3D
 / ( (double) m_ogl_3dmodel->GetBBox().GetMaxDimension() * UNITS3D_TO_UNITSPCB );
 }

 glViewport( 0, 0, clientSize.x, clientSize.y );

 m_trackBallCamera.SetCurWindowSize( clientSize );

 // clear color and depth buffers
 glEnable( GL_DEPTH_TEST );
 glClearColor( 0.0f, 0.0f, 0.0f, 1.0f );
 glClearDepth( 1.0f );
 glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

 // Set projection and modelview matrices
 glMatrixMode( GL_PROJECTION );
 glLoadMatrixf( glm::value_ptr( m_trackBallCamera.GetProjectionMatrix() ) );
 glMatrixMode( GL_MODELVIEW );
 glLoadMatrixf( glm::value_ptr( m_trackBallCamera.GetViewMatrix() ) );
 glEnable( GL_LIGHTING );
 glEnable( GL_LIGHT0 );

 // Render Model
 if( m_ogl_3dmodel )
 {
 glPushMatrix();

 double modelunit_to_3d_units_factor = m_BiuTo3dUnits * UNITS3D_TO_UNITSPCB;

 glScaled( modelunit_to_3d_units_factor, modelunit_to_3d_units_factor,
 modelunit_to_3d_units_factor );

 // Center model in the render viewport
 const SFVEC3F model_center = m_ogl_3dmodel->GetBBox().GetCenter();

 glTranslatef( -model_center.x, -model_center.y, -model_center.z );

 m_ogl_3dmodel->BeginDrawMulti( true );

 m_ogl_3dmodel->DrawOpaque( false );
 m_ogl_3dmodel->DrawTransparent( 1.0f, false );

 m_ogl_3dmodel->EndDrawMulti();

 glPopMatrix();
 }

 // YxY squared view port
 glViewport( 0, 0, clientSize.y / 8 , clientSize.y / 8 );
 glClear( GL_DEPTH_BUFFER_BIT );

 glMatrixMode( GL_PROJECTION );
 glLoadIdentity();
 gluPerspective( 45.0f, 1.0f, 0.01f, RANGE_SCALE_3D * 2.0f );

 glMatrixMode( GL_MODELVIEW );
 glLoadIdentity();

 const glm::mat4 TranslationMatrix = glm::translate( glm::mat4(1.0f),
 SFVEC3F( 0.0f, 0.0f, -RANGE_SCALE_3D ) );

 const glm::mat4 ViewMatrix = TranslationMatrix * m_trackBallCamera.GetRotationMatrix();

 glLoadMatrixf( glm::value_ptr( ViewMatrix ) );

 ogl_set_arrow_material();

 glColor3f( 0.9f, 0.0f, 0.0f );
 DrawRoundArrow( SFVEC3F( 0.0f, 0.0f, 0.0f ), SFVEC3F( RANGE_SCALE_3D / 2.65f, 0.0f, 0.0f ),
 0.275f );

 glColor3f( 0.0f, 0.9f, 0.0f );
 DrawRoundArrow( SFVEC3F( 0.0f, 0.0f, 0.0f ), SFVEC3F( 0.0f, RANGE_SCALE_3D / 2.65f, 0.0f ),
 0.275f );

 glColor3f( 0.0f, 0.0f, 0.9f );
 DrawRoundArrow( SFVEC3F( 0.0f, 0.0f, 0.0f ), SFVEC3F( 0.0f, 0.0f, RANGE_SCALE_3D / 2.65f ),
 0.275f );

 // "Swaps the double-buffer of this window, making the back-buffer the
 // front-buffer and vice versa, so that the output of the previous OpenGL
 // commands is displayed on the window."
 SwapBuffers();

 GL_CONTEXT_MANAGER::Get().UnlockCtx( m_glRC );
}


void EDA_3D_MODEL_VIEWER::OnEraseBackground( wxEraseEvent& event )
{
 wxLogTrace( m_logTrace, wxT( "EDA_3D_MODEL_VIEWER::OnEraseBackground" ) );
 // Do nothing, to avoid flashing.
}


void EDA_3D_MODEL_VIEWER::OnMouseWheel( wxMouseEvent& event )
{
 wxLogTrace( m_logTrace, wxT( "EDA_3D_MODEL_VIEWER::OnMouseWheel" ) );

 if( event.ShiftDown() )
 {
 //if( event.GetWheelRotation() < 0 )
 //SetView3D( WXK_UP ); // move up
 //else
 //SetView3D( WXK_DOWN ); // move down
 }
 else if( event.ControlDown() )
 {
 //if( event.GetWheelRotation() > 0 )
 //SetView3D( WXK_RIGHT ); // move right
  //else
 //SetView3D( WXK_LEFT ); // move left
 }
 else
 {
 m_trackBallCamera.Zoom( event.GetWheelRotation() > 0 ? 1.1f : 1/1.1f );

 //DisplayStatus();
 Refresh( false );
 }

 m_trackBallCamera.SetCurMousePosition( event.GetPosition() );
}


#ifdef USE_OSX_MAGNIFY_EVENT
void EDA_3D_MODEL_VIEWER::OnMagnify( wxMouseEvent& event )
{
}
#endif


void EDA_3D_MODEL_VIEWER::OnMouseMove( wxMouseEvent& event )
{
 const wxSize& nativeWinSize = GetNativePixelSize();
 const wxPoint& nativePosition = GetNativePosition( event.GetPosition() );

 m_trackBallCamera.SetCurWindowSize( nativeWinSize );

 if( event.Dragging() )
 {
 if( event.LeftIsDown() ) // Drag
 m_trackBallCamera.Drag( nativePosition );

 // orientation has changed, redraw mesh
 Refresh( false );
 }

 m_trackBallCamera.SetCurMousePosition( nativePosition );
}


void EDA_3D_MODEL_VIEWER::OnLeftDown( wxMouseEvent& event )
{
 event.Skip();
}


void EDA_3D_MODEL_VIEWER::OnLeftUp( wxMouseEvent& event )
{
 event.Skip();
}


void EDA_3D_MODEL_VIEWER::OnMiddleDown( wxMouseEvent& event )
{
 event.Skip();
}


void EDA_3D_MODEL_VIEWER::OnMiddleUp( wxMouseEvent& event )
{
 event.Skip();
}


void EDA_3D_MODEL_VIEWER::OnRightClick( wxMouseEvent& event )
{
 event.Skip();
}