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3D-Viewer: implement opacity in raytracing 

fix opacity implementation on OpenGL
This commit is contained in:
Mario Luzeiro 2020-04-25 15:38:41 +01:00 committed by Jon Evans
parent 5a7f875602
commit 9446a9166d
9 changed files with 73 additions and 68 deletions
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32
3d-viewer/3d_rendering/3d_render_ogl_legacy/c3d_render_ogl_legacy.cpp
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@ -1,7 +1,7 @@
/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2015-2016 Mario Luzeiro <mrluzeiro@ua.pt>
* Copyright (C) 2015-2020 Mario Luzeiro <mrluzeiro@ua.pt>
* Copyright (C) 1992-2020 KiCad Developers, see AUTHORS.txt for contributors.
*
* This program is free software; you can redistribute it and/or
@ -863,9 +863,39 @@ bool C3D_RENDER_OGL_LEGACY::Redraw(
// /////////////////////////////////////////////////////////////////////////
// !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 module opacity setting
glEnable( GL_TEXTURE_2D );
glActiveTexture( GL_TEXTURE0 );
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_CONSTANT );
render_3D_models( false, true );
render_3D_models( true, true );
glDisable( GL_BLEND );
OGL_ResetTextureStateDefaults();
glDepthMask( GL_TRUE );
// Render Grid
// /////////////////////////////////////////////////////////////////////////

41
3d-viewer/3d_rendering/3d_render_ogl_legacy/c_ogl_3dmodel.cpp
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@ -2,8 +2,8 @@
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2020 Oleg Endo <olegendo@gcc.gnu.org>
* Copyright (C) 2015-2016 Mario Luzeiro <mrluzeiro@ua.pt>
* Copyright (C) 1992-2016 KiCad Developers, see AUTHORS.txt for contributors.
* Copyright (C) 2015-2020 Mario Luzeiro <mrluzeiro@ua.pt>
* Copyright (C) 1992-2020 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
@ -414,36 +414,9 @@ void C_OGL_3DMODEL::Draw( bool aTransparent, float aOpacity ) const
glTexCoordPointer( 2, GL_FLOAT, sizeof( VERTEX ),
reinterpret_cast<const void*>( offsetof( VERTEX, m_tex_uv ) ) );
if( aTransparent )
{
glEnable( GL_BLEND );
glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
if( aOpacity < 1.0f )
{
glEnable( GL_TEXTURE_2D );
glActiveTexture( GL_TEXTURE0 );
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_CONSTANT );
const SFVEC4F param = SFVEC4F( 1.0f, 1.0f, 1.0f, aOpacity );
glTexEnvfv( GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, (const float*)&param.x );
}
}
// BeginDrawMulti();
@ -476,16 +449,6 @@ void C_OGL_3DMODEL::Draw( bool aTransparent, float aOpacity ) const
}
// EndDrawMulti();
if( aTransparent )
{
glDisable( GL_BLEND );
if( aOpacity < 1.0f )
{
OGL_ResetTextureStateDefaults();
}
}
}
C_OGL_3DMODEL::~C_OGL_3DMODEL()

14
3d-viewer/3d_rendering/3d_render_raytracing/c3d_render_createscene.cpp
View File

@ -1335,7 +1335,8 @@ void C3D_RENDER_RAYTRACING::load_3D_models()
while( sM != eM )
{
if( sM->m_Show && !sM->m_Filename.empty() )
if( ( (float)sM->m_Opacity > FLT_EPSILON ) &&
( sM->m_Show && !sM->m_Filename.empty() ) )
{
// get it from cache
const S3DMODEL *modelPtr = cacheMgr->GetModel( sM->m_Filename );
@ -1370,7 +1371,7 @@ void C3D_RENDER_RAYTRACING::load_3D_models()
sM->m_Scale.y,
sM->m_Scale.z ) );
add_3D_models( modelPtr, modelMatrix );
add_3D_models( modelPtr, modelMatrix, (float)sM->m_Opacity );
}
}
@ -1382,7 +1383,8 @@ void C3D_RENDER_RAYTRACING::load_3D_models()
void C3D_RENDER_RAYTRACING::add_3D_models( const S3DMODEL *a3DModel,
const glm::mat4 &aModelMatrix )
const glm::mat4 &aModelMatrix,
float aModuleOpacity )
{
// Validate a3DModel pointers
@ -1591,11 +1593,13 @@ void C3D_RENDER_RAYTRACING::add_3D_models( const S3DMODEL *a3DModel,
CTRIANGLE *newTriangle = new CTRIANGLE( vt0, vt2, vt1,
nt0, nt2, nt1 );
m_object_container.Add( newTriangle );
newTriangle->SetMaterial( (const CMATERIAL *)&blinn_material );
const float moduleTransparency = 1.0f - ( ( 1.0f - blinn_material.GetTransparency() ) * aModuleOpacity );
newTriangle->SetModelTransparency( moduleTransparency );
if( mesh.m_Color == NULL )
{
const SFVEC3F diffuseColor =

10
3d-viewer/3d_rendering/3d_render_raytracing/c3d_render_raytracing.cpp
View File

@ -1,8 +1,8 @@
/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2015-2016 Mario Luzeiro <mrluzeiro@ua.pt>
* Copyright (C) 1992-2016 KiCad Developers, see AUTHORS.txt for contributors.
* Copyright (C) 2015-2020 Mario Luzeiro <mrluzeiro@ua.pt>
* Copyright (C) 1992-2020 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
@ -1934,7 +1934,9 @@ SFVEC3F C3D_RENDER_RAYTRACING::shadeHit( const SFVEC3F &aBgColor,
// Refractions
// /////////////////////////////////////////////////////////////////////
if((objMaterial->GetTransparency() > 0.0f) &&
const float objTransparency = aHitInfo.pHitObject->GetModelTransparency();
if( ( objTransparency > 0.0f ) &&
m_boardAdapter.GetFlag( FL_RENDER_RAYTRACING_REFRACTIONS ) )
{
const float airIndex = 1.000293f;
@ -1951,8 +1953,6 @@ SFVEC3F C3D_RENDER_RAYTRACING::shadeHit( const SFVEC3F &aBgColor,
refractionRatio,
refractedVector ) )
{
const float objTransparency = objMaterial->GetTransparency();
// This increase the start point by a "fixed" factor so it will work the
// same for all distances
const SFVEC3F startPoint = aRay.at( NextFloatUp(

7
3d-viewer/3d_rendering/3d_render_raytracing/c3d_render_raytracing.h
View File

@ -1,8 +1,8 @@
/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2015-2016 Mario Luzeiro <mrluzeiro@ua.pt>
* Copyright (C) 1992-2016 KiCad Developers, see AUTHORS.txt for contributors.
* Copyright (C) 2015-2020 Mario Luzeiro <mrluzeiro@ua.pt>
* Copyright (C) 1992-2020 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
@ -197,7 +197,8 @@ private:
void insert3DPadHole( const D_PAD* aPad );
void load_3D_models();
void add_3D_models( const S3DMODEL *a3DModel,
const glm::mat4 &aModelMatrix );
const glm::mat4 &aModelMatrix,
float aModuleOpacity );
/// Stores materials of the 3D models
MAP_MODEL_MATERIALS m_model_materials;

6
3d-viewer/3d_rendering/3d_render_raytracing/cmaterial.cpp
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@ -1,8 +1,8 @@
/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2015-2016 Mario Luzeiro <mrluzeiro@ua.pt>
* Copyright (C) 1992-2016 KiCad Developers, see AUTHORS.txt for contributors.
* Copyright (C) 2015-2020 Mario Luzeiro <mrluzeiro@ua.pt>
* Copyright (C) 1992-2020 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
@ -74,7 +74,7 @@ CMATERIAL::CMATERIAL( const SFVEC3F &aAmbient,
m_emissiveColor = aEmissive;
m_specularColor = aSpecular;
m_shinness = aShinness;
m_transparency = aTransparency;
m_transparency = glm::clamp( aTransparency, 0.0f, 1.0f );
m_absorbance = 1.0f;
m_reflection = aReflection;
m_cast_shadows = true;

4
3d-viewer/3d_rendering/3d_render_raytracing/shapes2D/cobject2d.cpp
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@ -1,8 +1,8 @@
/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2015-2016 Mario Luzeiro <mrluzeiro@ua.pt>
* Copyright (C) 1992-2016 KiCad Developers, see AUTHORS.txt for contributors.
* Copyright (C) 2015-2020 Mario Luzeiro <mrluzeiro@ua.pt>
* Copyright (C) 1992-2020 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

1
3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/cobject.cpp
View File

@ -41,6 +41,7 @@ COBJECT::COBJECT( OBJECT3D_TYPE aObjType )
m_obj_type = aObjType;
COBJECT3D_STATS::Instance().AddOne( aObjType );
m_material = &s_defaultMaterial;
m_modelTransparency = 0.0f;
}

10
3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/cobject.h
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@ -1,8 +1,8 @@
/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2015-2016 Mario Luzeiro <mrluzeiro@ua.pt>
* Copyright (C) 1992-2016 KiCad Developers, see AUTHORS.txt for contributors.
* Copyright (C) 2015-2020 Mario Luzeiro <mrluzeiro@ua.pt>
* Copyright (C) 1992-2020 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
@ -55,12 +55,18 @@ protected:
OBJECT3D_TYPE m_obj_type;
const CMATERIAL *m_material;
// m_modelTransparency combines the material and model opacity
// 0.0 full opaque, 1.0 full transparent.
float m_modelTransparency;
public:
explicit COBJECT( OBJECT3D_TYPE aObjType );
void SetMaterial( const CMATERIAL *aMaterial ) { m_material = aMaterial; }
const CMATERIAL *GetMaterial() const { return m_material; }
float GetModelTransparency() const { return m_modelTransparency; }
void SetModelTransparency( float aModelTransparency ) { m_modelTransparency = aModelTransparency; }
virtual SFVEC3F GetDiffuseColor( const HITINFO &aHitInfo ) const = 0;