kicad/3d-viewer/3d_rendering/legacy/3d_model.cpp

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/*
* 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) 2015-2020 Mario Luzeiro <mrluzeiro@ua.pt>
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* Copyright (C) 2015-2020 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
* 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
*/
/**
* @file c_ogl_3dmodel.cpp
* @brief
*/
#include <gal/opengl/kiglew.h> // Must be included first
#include "3d_model.h"
#include "ogl_legacy_utils.h"
#include "../common_ogl/ogl_utils.h"
#include "../3d_math.h"
#include <wx/debug.h>
#include <chrono>
#include <memory>
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/*
* Flag to enable connectivity profiling.
*
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* @ingroup trace_env_vars
*/
const wxChar* MODEL_3D::m_logTrace = wxT( "KI_TRACE_EDA_OGL_3DMODEL" );
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void MODEL_3D::MakeBbox( const BBOX_3D& aBox, unsigned int aIdxOffset, VERTEX* aVtxOut,
GLuint* aIdxOut, const glm::vec4& aColor )
{
aVtxOut[0].m_pos = { aBox.Min().x, aBox.Min().y, aBox.Min().z };
aVtxOut[1].m_pos = { aBox.Max().x, aBox.Min().y, aBox.Min().z };
aVtxOut[2].m_pos = { aBox.Max().x, aBox.Max().y, aBox.Min().z };
aVtxOut[3].m_pos = { aBox.Min().x, aBox.Max().y, aBox.Min().z };
aVtxOut[4].m_pos = { aBox.Min().x, aBox.Min().y, aBox.Max().z };
aVtxOut[5].m_pos = { aBox.Max().x, aBox.Min().y, aBox.Max().z };
aVtxOut[6].m_pos = { aBox.Max().x, aBox.Max().y, aBox.Max().z };
aVtxOut[7].m_pos = { aBox.Min().x, aBox.Max().y, aBox.Max().z };
for( unsigned int i = 0; i < 8; ++i )
aVtxOut[i].m_color = aVtxOut[i].m_cad_color = glm::clamp( aColor * 255.0f, 0.0f, 255.0f );
#define bbox_line( vtx_a, vtx_b )\
do { *aIdxOut++ = vtx_a + aIdxOffset; \
*aIdxOut++ = vtx_b + aIdxOffset; } while( 0 )
bbox_line( 0, 1 );
bbox_line( 1, 2 );
bbox_line( 2, 3 );
bbox_line( 3, 0 );
bbox_line( 4, 5 );
bbox_line( 5, 6 );
bbox_line( 6, 7 );
bbox_line( 7, 4 );
bbox_line( 0, 4 );
bbox_line( 1, 5 );
bbox_line( 2, 6 );
bbox_line( 3, 7 );
#undef bbox_line
}
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MODEL_3D::MODEL_3D( const S3DMODEL& a3DModel, MATERIAL_MODE aMaterialMode )
{
wxLogTrace( m_logTrace, wxT( "MODEL_3D::MODEL_3D %u meshes %u materials" ),
static_cast<unsigned int>( a3DModel.m_MeshesSize ),
static_cast<unsigned int>( a3DModel.m_MaterialsSize ) );
auto start_time = std::chrono::high_resolution_clock::now();
// Validate a3DModel pointers
wxASSERT( a3DModel.m_Materials != nullptr );
wxASSERT( a3DModel.m_Meshes != nullptr );
wxASSERT( a3DModel.m_MaterialsSize > 0 );
wxASSERT( a3DModel.m_MeshesSize > 0 );
m_materialMode = aMaterialMode;
if( a3DModel.m_Materials == nullptr || a3DModel.m_Meshes == nullptr
|| a3DModel.m_MaterialsSize == 0 || a3DModel.m_MeshesSize == 0 )
return;
// create empty bbox for each mesh. it will be updated when the vertices are copied.
m_meshes_bbox.resize( a3DModel.m_MeshesSize );
// copy materials for later use during rendering.
m_materials.reserve( a3DModel.m_MaterialsSize );
for( unsigned int i = 0; i < a3DModel.m_MaterialsSize; ++i )
m_materials.emplace_back( a3DModel.m_Materials[i] );
// build temporary vertex and index buffers for bounding boxes.
// the first box is the outer box.
std::vector<VERTEX> bbox_tmp_vertices( ( m_meshes_bbox.size() + 1 ) * bbox_vtx_count );
std::vector<GLuint> bbox_tmp_indices( ( m_meshes_bbox.size() + 1 ) * bbox_idx_count );
// group all meshes by material.
// for each material create a combined vertex and index buffer.
// some models might have many sub-meshes. so iterate over the
// input meshes only once.
struct MESH_GROUP
{
std::vector<VERTEX> m_vertices;
std::vector<GLuint> m_indices;
};
std::vector<MESH_GROUP> mesh_groups( m_materials.size() );
for( unsigned int mesh_i = 0; mesh_i < a3DModel.m_MeshesSize; ++mesh_i )
{
const auto& mesh = a3DModel.m_Meshes[mesh_i];
// silently ignore meshes that have invalid material references or invalid geometry.
if( mesh.m_MaterialIdx >= m_materials.size()
|| mesh.m_Positions == nullptr
|| mesh.m_FaceIdx == nullptr
|| mesh.m_Normals == nullptr
|| mesh.m_FaceIdxSize == 0
|| mesh.m_VertexSize == 0 )
continue;
auto& mesh_group = mesh_groups[mesh.m_MaterialIdx];
auto& material = m_materials[mesh.m_MaterialIdx];
if( material.IsTransparent() )
m_have_transparent_meshes = true;
else
m_have_opaque_meshes = true;
const unsigned int vtx_offset = mesh_group.m_vertices.size();
mesh_group.m_vertices.resize( mesh_group.m_vertices.size() + mesh.m_VertexSize );
// copy vertex data and update the bounding box.
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// use material color for mesh bounding box or some sort of average vertex color.
glm::vec3 avg_color = material.m_Diffuse;
for( unsigned int vtx_i = 0; vtx_i < mesh.m_VertexSize; ++vtx_i )
{
m_meshes_bbox[mesh_i].Union( mesh.m_Positions[vtx_i] );
auto& vtx_out = mesh_group.m_vertices[vtx_offset + vtx_i];
vtx_out.m_pos = mesh.m_Positions[vtx_i];
vtx_out.m_nrm = glm::clamp( glm::vec4( mesh.m_Normals[vtx_i], 1.0f ) * 127.0f,
-127.0f, 127.0f );
vtx_out.m_tex_uv = mesh.m_Texcoords != nullptr
? mesh.m_Texcoords[vtx_i]
: glm::vec2 (0);
if( mesh.m_Color != nullptr )
{
avg_color = ( avg_color + mesh.m_Color[vtx_i] ) * 0.5f;
vtx_out.m_color =
glm::clamp( glm::vec4( mesh.m_Color[vtx_i],
1 - material.m_Transparency ) * 255.0f,
0.0f, 255.0f );
vtx_out.m_cad_color =
glm::clamp( glm::vec4( MaterialDiffuseToColorCAD( mesh.m_Color[vtx_i] ),
1 ) * 255.0f, 0.0f, 255.0f );
}
else
{
// the mesh will be rendered with other meshes that might have
// vertex colors. thus, we can't enable/disable vertex colors
// for individual meshes during rendering.
// if there are no vertex colors, use material color instead.
vtx_out.m_color =
glm::clamp( glm::vec4( material.m_Diffuse,
1 - material.m_Transparency ) * 255.0f,
0.0f, 255.0f );
vtx_out.m_cad_color =
glm::clamp( glm::vec4 ( MaterialDiffuseToColorCAD( material.m_Diffuse ),
1 ) * 255.0f,
0.0f, 255.0f );
}
}
if( m_meshes_bbox[mesh_i].IsInitialized() )
{
// generate geometry for the bounding box
MakeBbox( m_meshes_bbox[mesh_i], ( mesh_i + 1 ) * bbox_vtx_count,
&bbox_tmp_vertices[( mesh_i + 1 ) * bbox_vtx_count],
&bbox_tmp_indices[( mesh_i + 1 ) * bbox_idx_count],
{ avg_color, 1.0f } );
// bump the outer bounding box
m_model_bbox.Union( m_meshes_bbox[mesh_i] );
}
// append indices of this mesh to the mesh group.
const unsigned int idx_offset = mesh_group.m_indices.size();
unsigned int use_idx_count = mesh.m_FaceIdxSize;
if( use_idx_count % 3 != 0 )
{
wxLogTrace( m_logTrace, wxT( " index count %u not multiple of 3, truncating" ),
static_cast<unsigned int>( use_idx_count ) );
use_idx_count = ( use_idx_count / 3 ) * 3;
}
mesh_group.m_indices.resize( mesh_group.m_indices.size() + use_idx_count );
for( unsigned int idx_i = 0; idx_i < use_idx_count; ++idx_i )
{
if( mesh.m_FaceIdx[idx_i] >= mesh.m_VertexSize )
{
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wxLogTrace( m_logTrace, wxT( " index %u out of range (%u)" ),
static_cast<unsigned int>( mesh.m_FaceIdx[idx_i] ),
static_cast<unsigned int>( mesh.m_VertexSize ) );
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// FIXME: should skip this triangle
}
mesh_group.m_indices[idx_offset + idx_i] = mesh.m_FaceIdx[idx_i] + vtx_offset;
}
}
// generate geometry for the outer bounding box
if( m_model_bbox.IsInitialized() )
MakeBbox( m_model_bbox, 0, &bbox_tmp_vertices[0], &bbox_tmp_indices[0],
{ 0.0f, 1.0f, 0.0f, 1.0f } );
// create bounding box buffers
glGenBuffers( 1, &m_bbox_vertex_buffer );
glBindBuffer( GL_ARRAY_BUFFER, m_bbox_vertex_buffer );
glBufferData( GL_ARRAY_BUFFER, sizeof( VERTEX ) * bbox_tmp_vertices.size(),
bbox_tmp_vertices.data(), GL_STATIC_DRAW );
glGenBuffers( 1, &m_bbox_index_buffer );
glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, m_bbox_index_buffer );
if( bbox_tmp_vertices.size() <= std::numeric_limits<GLushort>::max() )
{
m_bbox_index_buffer_type = GL_UNSIGNED_SHORT;
auto u16buf = std::make_unique<GLushort[]>( bbox_tmp_indices.size() );
for( unsigned int i = 0; i < bbox_tmp_indices.size(); ++i )
u16buf[i] = static_cast<GLushort>( bbox_tmp_indices[i] );
glBufferData( GL_ELEMENT_ARRAY_BUFFER, sizeof( GLushort ) * bbox_tmp_indices.size(),
u16buf.get(), GL_STATIC_DRAW );
}
else
{
m_bbox_index_buffer_type = GL_UNSIGNED_INT;
glBufferData( GL_ELEMENT_ARRAY_BUFFER, sizeof( GLuint ) * bbox_tmp_indices.size(),
bbox_tmp_indices.data(), GL_STATIC_DRAW );
}
// merge the mesh group geometry data.
unsigned int total_vertex_count = 0;
unsigned int total_index_count = 0;
for( auto& mg : mesh_groups )
{
total_vertex_count += mg.m_vertices.size();
total_index_count += mg.m_indices.size();
}
wxLogTrace( m_logTrace, wxT( " total %u vertices, %u indices" ),
total_vertex_count, total_index_count );
glGenBuffers( 1, &m_vertex_buffer );
glBindBuffer( GL_ARRAY_BUFFER, m_vertex_buffer );
glBufferData( GL_ARRAY_BUFFER, sizeof( VERTEX ) * total_vertex_count,
nullptr, GL_STATIC_DRAW );
unsigned int idx_size = 0;
if( total_vertex_count <= std::numeric_limits<GLushort>::max() )
{
m_index_buffer_type = GL_UNSIGNED_SHORT;
idx_size = sizeof( GLushort );
}
else
{
m_index_buffer_type = GL_UNSIGNED_INT;
idx_size = sizeof( GLuint );
}
// temporary index buffer which will contain either GLushort or GLuint
// type indices. allocate with a bit of meadow at the end.
auto tmp_idx = std::make_unique<GLuint[]>(
( idx_size * total_index_count + 8 ) / sizeof( GLuint ) );
unsigned int prev_vtx_count = 0;
unsigned int idx_offset = 0;
unsigned int vtx_offset = 0;
for( unsigned int mg_i = 0; mg_i < mesh_groups.size (); ++mg_i )
{
auto& mg = mesh_groups[mg_i];
auto& mat = m_materials[mg_i];
if( m_index_buffer_type == GL_UNSIGNED_SHORT )
{
auto idx_out = reinterpret_cast<GLushort*>(
reinterpret_cast<uintptr_t>( tmp_idx.get() ) + idx_offset );
for( auto idx : mg.m_indices )
*idx_out++ = static_cast<GLushort>( idx + prev_vtx_count );
}
else if( m_index_buffer_type == GL_UNSIGNED_INT )
{
auto idx_out = reinterpret_cast<GLuint*>(
reinterpret_cast<uintptr_t>( tmp_idx.get() ) + idx_offset );
for( auto idx : mg.m_indices )
*idx_out++ = static_cast<GLuint>( idx + prev_vtx_count );
}
glBufferSubData( GL_ARRAY_BUFFER, vtx_offset, mg.m_vertices.size() * sizeof( VERTEX ),
mg.m_vertices.data() );
mat.m_render_idx_buffer_offset = idx_offset;
mat.m_render_idx_count = mg.m_indices.size();
prev_vtx_count += mg.m_vertices.size();
idx_offset += mg.m_indices.size() * idx_size;
vtx_offset += mg.m_vertices.size() * sizeof( VERTEX );
}
glGenBuffers( 1, &m_index_buffer );
glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, m_index_buffer );
glBufferData( GL_ELEMENT_ARRAY_BUFFER, idx_size * total_index_count, tmp_idx.get(),
GL_STATIC_DRAW );
glBindBuffer( GL_ARRAY_BUFFER, 0 );
glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, 0 );
auto end_time = std::chrono::high_resolution_clock::now();
wxLogTrace( m_logTrace, wxT( " loaded in %u ms\n" ),
(unsigned int)std::chrono::duration_cast<std::chrono::milliseconds> (
end_time - start_time).count() );
}
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void MODEL_3D::BeginDrawMulti( bool aUseColorInformation )
{
glEnableClientState( GL_VERTEX_ARRAY );
glEnableClientState( GL_NORMAL_ARRAY );
if( aUseColorInformation )
{
glEnableClientState( GL_COLOR_ARRAY );
glEnableClientState( GL_TEXTURE_COORD_ARRAY );
glEnable( GL_COLOR_MATERIAL );
}
glColorMaterial( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE );
}
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void MODEL_3D::EndDrawMulti()
{
glDisable( GL_COLOR_MATERIAL );
glDisableClientState( GL_VERTEX_ARRAY );
glDisableClientState( GL_NORMAL_ARRAY );
glDisableClientState( GL_COLOR_ARRAY );
glDisableClientState( GL_TEXTURE_COORD_ARRAY );
glBindBuffer( GL_ARRAY_BUFFER, 0 );
glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, 0 );
}
void MODEL_3D::Draw( bool aTransparent, float aOpacity, bool aUseSelectedMaterial,
SFVEC3F& aSelectionColor ) const
{
if( aOpacity <= FLT_EPSILON )
return;
if( !glBindBuffer )
throw std::runtime_error( "The OpenGL context no longer exists: unable to draw" );
glBindBuffer( GL_ARRAY_BUFFER, m_vertex_buffer );
glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, m_index_buffer );
glVertexPointer( 3, GL_FLOAT, sizeof( VERTEX ),
reinterpret_cast<const void*>( offsetof( VERTEX, m_pos ) ) );
glNormalPointer( GL_BYTE, sizeof( VERTEX ),
reinterpret_cast<const void*>( offsetof( VERTEX, m_nrm ) ) );
glColorPointer( 4, GL_UNSIGNED_BYTE, sizeof( VERTEX ),
reinterpret_cast<const void*>(
m_materialMode == MATERIAL_MODE::CAD_MODE
? offsetof( VERTEX, m_cad_color )
: offsetof( VERTEX, m_color ) ) );
glTexCoordPointer( 2, GL_FLOAT, sizeof( VERTEX ),
reinterpret_cast<const void*>( offsetof( VERTEX, m_tex_uv ) ) );
const SFVEC4F param = SFVEC4F( 1.0f, 1.0f, 1.0f, aOpacity );
glTexEnvfv( GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, (const float*)&param.x );
// BeginDrawMulti();
for( auto& mat : m_materials )
{
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if( ( mat.IsTransparent() != aTransparent ) && ( aOpacity >= 1.0f ) )
continue;
switch( m_materialMode )
{
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case MATERIAL_MODE::NORMAL:
OglSetMaterial( mat, aOpacity, aUseSelectedMaterial, aSelectionColor );
break;
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case MATERIAL_MODE::DIFFUSE_ONLY:
OglSetDiffuseMaterial( mat.m_Diffuse, aOpacity );
break;
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case MATERIAL_MODE::CAD_MODE:
OglSetDiffuseMaterial( MaterialDiffuseToColorCAD( mat.m_Diffuse ), aOpacity );
break;
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default:
break;
}
glDrawElements( GL_TRIANGLES, mat.m_render_idx_count, m_index_buffer_type,
reinterpret_cast<const void*>( mat.m_render_idx_buffer_offset ) );
}
}
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MODEL_3D::~MODEL_3D()
{
if( glDeleteBuffers )
{
glDeleteBuffers( 1, &m_vertex_buffer );
glDeleteBuffers( 1, &m_index_buffer );
glDeleteBuffers( 1, &m_bbox_vertex_buffer );
glDeleteBuffers( 1, &m_bbox_index_buffer );
}
}
void MODEL_3D::DrawBbox() const
{
if( !glBindBuffer )
throw std::runtime_error( "The OpenGL context no longer exists: unable to draw bbox" );
glBindBuffer( GL_ARRAY_BUFFER, m_bbox_vertex_buffer );
glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, m_bbox_index_buffer );
glVertexPointer( 3, GL_FLOAT, sizeof( VERTEX ),
reinterpret_cast<const void*>( offsetof( VERTEX, m_pos ) ) );
glColorPointer( 4, GL_UNSIGNED_BYTE, sizeof( VERTEX ),
reinterpret_cast<const void*>( offsetof( VERTEX, m_color ) ) );
glDrawElements( GL_LINES, bbox_idx_count, m_bbox_index_buffer_type,
reinterpret_cast<const void*>( 0 ) );
}
void MODEL_3D::DrawBboxes() const
{
if( !glBindBuffer )
throw std::runtime_error( "The OpenGL context no longer exists: unable to draw bboxes" );
glBindBuffer( GL_ARRAY_BUFFER, m_bbox_vertex_buffer );
glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, m_bbox_index_buffer );
glVertexPointer( 3, GL_FLOAT, sizeof( VERTEX ),
reinterpret_cast<const void*>( offsetof( VERTEX, m_pos ) ) );
glColorPointer( 4, GL_UNSIGNED_BYTE, sizeof( VERTEX ),
reinterpret_cast<const void*>( offsetof( VERTEX, m_color ) ) );
unsigned int idx_size = m_bbox_index_buffer_type == GL_UNSIGNED_SHORT
? sizeof( GLushort ) : sizeof( GLuint );
glDrawElements( GL_LINES, bbox_idx_count * m_meshes_bbox.size(), m_bbox_index_buffer_type,
reinterpret_cast<const void*>( bbox_idx_count * idx_size ) );
}