include/cinder/TriMesh.h

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/*
 Copyright (c) 2010, The Barbarian Group
 All rights reserved.

 Redistribution and use in source and binary forms, with or without modification, are permitted provided that
 the following conditions are met:

    * Redistributions of source code must retain the above copyright notice, this list of conditions and
    the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
    the following disclaimer in the documentation and/or other materials provided with the distribution.

 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 POSSIBILITY OF SUCH DAMAGE.
*/

#pragma once

#include <vector>
#include "cinder/Vector.h"
#include "cinder/AxisAlignedBox.h"
#include "cinder/DataSource.h"
#include "cinder/DataTarget.h"
#include "cinder/Matrix.h"
#include "cinder/Color.h"
#include "cinder/Rect.h"

namespace cinder {
    
class TriMesh {
 public:
    
    void        clear();
    
    bool        hasNormals() const { return ! mNormals.empty(); }
    bool        hasColorsRGB() const { return ! mColorsRGB.empty(); }
    bool        hasColorsRGBA() const { return ! mColorsRGBA.empty(); }
    bool        hasTexCoords() const { return ! mTexCoords.empty(); }

    void        appendVertex( const Vec3f &v ) { mVertices.push_back( v ); }
    void        appendVertices( const Vec3f *verts, size_t num );
    void        appendVertices( const Vec4d *verts, size_t num );
    void        appendNormal( const Vec3f &v ) { mNormals.push_back( v ); }
    void        appendNormals( const Vec3f *normals, size_t num );
    void        appendNormals( const Vec4d *normals, size_t num );
    void        appendColorRgb( const Color &rgb ) { mColorsRGB.push_back( rgb ); }
    void        appendColorRgba( const ColorA &rgba ) { mColorsRGBA.push_back( rgba ); }
    void        appendTexCoord( const Vec2f &v ) { mTexCoords.push_back( v ); }
    
    void        appendColorsRgb( const Color *rgbs, size_t num );
    void        appendColorsRgba( const ColorA *rgbas, size_t num );
    void        appendTexCoords( const Vec2f *texcoords, size_t num );
    
    void        appendTriangle( size_t v0, size_t v1, size_t v2 )
    { mIndices.push_back( v0 ); mIndices.push_back( v1 ); mIndices.push_back( v2 ); }
    void        appendIndices( const uint32_t *indices, size_t num );

    size_t      getNumIndices() const { return mIndices.size(); }
    size_t      getNumTriangles() const { return mIndices.size() / 3; }
    size_t      getNumVertices() const { return mVertices.size(); }

    void        getTriangleVertices( size_t idx, Vec3f *a, Vec3f *b, Vec3f *c ) const;

    std::vector<Vec3f>&             getVertices() { return mVertices; }
    const std::vector<Vec3f>&       getVertices() const { return mVertices; }
    std::vector<Vec3f>&             getNormals() { return mNormals; }
    const std::vector<Vec3f>&       getNormals() const { return mNormals; }
    std::vector<Color>&             getColorsRGB() { return mColorsRGB; }
    const std::vector<Color>&       getColorsRGB() const { return mColorsRGB; }
    std::vector<ColorA>&            getColorsRGBA() { return mColorsRGBA; }
    const std::vector<ColorA>&      getColorsRGBA() const { return mColorsRGBA; }
    std::vector<Vec2f>&             getTexCoords() { return mTexCoords; }   
    const std::vector<Vec2f>&       getTexCoords() const { return mTexCoords; } 
    std::vector<uint32_t>&          getIndices() { return mIndices; }       
    const std::vector<uint32_t>&    getIndices() const { return mIndices; }     

    AxisAlignedBox3f    calcBoundingBox() const;
    AxisAlignedBox3f    calcBoundingBox( const Matrix44f &transform ) const;

    void        read( DataSourceRef in );
    void        write( DataTargetRef out ) const;

    void        recalculateNormals();
    
 private:
    std::vector<Vec3f>      mVertices;
    std::vector<Vec3f>      mNormals;
    std::vector<Color>      mColorsRGB;
    std::vector<ColorA>     mColorsRGBA;
    std::vector<Vec2f>      mTexCoords;
    std::vector<uint32_t>   mIndices;
};

class TriMesh2d {
 public:
    void        clear();
    
    bool        hasColorsRgb() const { return ! mColorsRgb.empty(); }
    bool        hasColorsRgba() const { return ! mColorsRgba.empty(); }
    bool        hasTexCoords() const { return ! mTexCoords.empty(); }

    void        appendVertex( const Vec2f &v ) { mVertices.push_back( v ); }
    void        appendVertices( const Vec2f *verts, size_t num );
    void        appendColorRgb( const Color &rgb ) { mColorsRgb.push_back( rgb ); }
    void        appendColorRgba( const ColorA &rgba ) { mColorsRgba.push_back( rgba ); }
    void        appendTexCoord( const Vec2f &v ) { mTexCoords.push_back( v ); }
    
    void        appendColorsRgb( const Color *rgbs, size_t num );
    void        appendColorsRgba( const ColorA *rgbas, size_t num );
    void        appendTexCoords( const Vec2f *texcoords, size_t num );
    
    void        appendTriangle( size_t v0, size_t v1, size_t v2 )
    { mIndices.push_back( v0 ); mIndices.push_back( v1 ); mIndices.push_back( v2 ); }
    void        appendIndices( const uint32_t *indices, size_t num );
    
    size_t      getNumIndices() const { return mIndices.size(); }
    size_t      getNumTriangles() const { return mIndices.size() / 3; }
    size_t      getNumVertices() const { return mVertices.size(); }

    void        getTriangleVertices( size_t idx, Vec2f *a, Vec2f *b, Vec2f *c ) const;

    std::vector<Vec2f>&             getVertices() { return mVertices; }
    const std::vector<Vec2f>&       getVertices() const { return mVertices; }
    std::vector<Color>&             getColorsRGB() { return mColorsRgb; }
    const std::vector<Color>&       getColorsRGB() const { return mColorsRgb; }
    std::vector<ColorA>&            getColorsRGBA() { return mColorsRgba; }
    const std::vector<ColorA>&      getColorsRGBA() const { return mColorsRgba; }
    std::vector<Vec2f>&             getTexCoords() { return mTexCoords; }   
    const std::vector<Vec2f>&       getTexCoords() const { return mTexCoords; } 
    std::vector<size_t>&            getIndices() { return mIndices; }       
    const std::vector<size_t>&      getIndices() const { return mIndices; }     

    Rectf   calcBoundingBox() const;

 private:
    std::vector<Vec2f>      mVertices;
    std::vector<Color>      mColorsRgb;
    std::vector<ColorA>     mColorsRgba;
    std::vector<Vec2f>      mTexCoords;
    std::vector<size_t>     mIndices;
};

} // namespace cinder