3d_model.h

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2020 Oleg Endo <[email protected]>
 * Copyright (C) 2015-2016 Mario Luzeiro <[email protected]>
 * 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
 */

#ifndef _MODEL_3D_H_
#define _MODEL_3D_H_

#include <vector>
#include <plugins/3dapi/c3dmodel.h>
#include "../../common_ogl/openGL_includes.h"
#include "../raytracing/shapes3D/bbox_3d.h"
#include "../../3d_enums.h"

#include <wx/chartype.h>

class MODEL_3D
{
public:
 MODEL_3D( const S3DMODEL& a3DModel, MATERIAL_MODE aMaterialMode );

 ~MODEL_3D();

 void DrawOpaque( bool aUseSelectedMaterial, SFVEC3F aSelectionColor = SFVEC3F( 0.0f ) ) const
 {
 Draw( false, 1.0f, aUseSelectedMaterial, aSelectionColor );
 }

 void DrawTransparent( float aOpacity, bool aUseSelectedMaterial,
 SFVEC3F aSelectionColor = SFVEC3F( 0.0f ) ) const
 {
 Draw( true, aOpacity, aUseSelectedMaterial, aSelectionColor );
 }

 bool HasOpaqueMeshes() const { return m_have_opaque_meshes; }

 bool HasTransparentMeshes() const { return m_have_transparent_meshes; }

 void DrawBbox() const;

 void DrawBboxes() const;

 const BBOX_3D& GetBBox() const { return m_model_bbox; }

 static void BeginDrawMulti( bool aUseColorInformation );

 static void EndDrawMulti();

private:
 static const wxChar* m_logTrace;

 // the material mode that was used to generate the rendering data.
 // FIXME: this can be selected at run-time and does not require re-creation
 // of the whole model objects.
 MATERIAL_MODE m_materialMode;

 BBOX_3D m_model_bbox; 
 std::vector<BBOX_3D> m_meshes_bbox; 

 // unified vertex format for mesh rendering.
 struct VERTEX
 {
 glm::vec3 m_pos;
 glm::u8vec4 m_nrm; // only 3 components used
 glm::u8vec4 m_color; // regular color
 glm::u8vec4 m_cad_color; // "CAD" mode rendering color
 glm::vec2 m_tex_uv;
 };

 // vertex buffer and index buffers that include all the individual meshes
 // lumped together.
 GLuint m_vertex_buffer = 0;
 GLuint m_index_buffer = 0;
 GLenum m_index_buffer_type = GL_INVALID_ENUM;

 // internal material definition
 // all meshes are grouped by material for rendering purposes.
 struct MATERIAL : SMATERIAL
 {
 unsigned int m_render_idx_buffer_offset = 0;
 unsigned int m_render_idx_count = 0;

 MATERIAL( const SMATERIAL& aOther ) : SMATERIAL( aOther ) { }
 bool IsTransparent() const { return m_Transparency > FLT_EPSILON; }
 };

 std::vector<MATERIAL> m_materials;

 // a model can consist of transparent and opaque parts. remember which
 // ones are present during initial buffer and data setup. use it later
 // during rendering.
 bool m_have_opaque_meshes = false;
 bool m_have_transparent_meshes = false;

 // vertex buffer and index buffer for the bounding boxes.
 // the first box is always the outer box, followed by inner boxes (one for each mesh).
 static constexpr unsigned int bbox_vtx_count = 8;
 static constexpr unsigned int bbox_idx_count = 24;

 GLuint m_bbox_vertex_buffer = 0;
 GLuint m_bbox_index_buffer = 0;
 GLenum m_bbox_index_buffer_type = GL_INVALID_ENUM;

 static void MakeBbox( const BBOX_3D& aBox, unsigned int aIdxOffset, VERTEX* aVtxOut,
 GLuint* aIdxOut, const glm::vec4& aColor );

 void Draw( bool aTransparent, float aOpacity, bool aUseSelectedMaterial,
 SFVEC3F& aSelectionColor ) const;
};

#endif // _MODEL_3D_H_