Cinder

include/cinder/Shape2d.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 "cinder/Vector.h"
#include "cinder/Rect.h"
#include "cinder/Path2d.h"

#include <vector>

namespace cinder {

class Shape2d {
  public:
    void    moveTo( const Vec2f &p );
    void    moveTo( float x, float y ) { moveTo( Vec2f( x, y ) ); }
    void    lineTo( const Vec2f &p );
    void    lineTo( float x, float y ) { lineTo( Vec2f( x, y ) ); }
    void    quadTo( const Vec2f &p1, const Vec2f &p2 );
    void    quadTo( float x1, float y1, float x2, float y2 ) { quadTo( Vec2f( x1, y1 ), Vec2f( x2, y2 ) ); }
    void    curveTo( const Vec2f &p1, const Vec2f &p2, const Vec2f &p3 );
    void    curveTo( float x1, float y1, float x2, float y2, float x3, float y3 ) { curveTo( Vec2f( x1, y1 ), Vec2f( x2, y2 ), Vec2f( x3, y3 ) ); }
    void    close();
    
    bool    empty() const { return mContours.empty(); }
    void    clear() { mContours.clear(); }
    size_t  getNumContours() const { return mContours.size(); }
    
    const Path2d&   getContour( size_t i ) const { return mContours[i]; }
    Path2d&         getContour( size_t i ) { return mContours[i]; }
    
    const Vec2f&    getCurrentPoint() const { return mContours.back().getCurrentPoint(); }
    
    void            removeContour( size_t i ) { mContours.erase( mContours.begin() + i ); }

    Rectf           calcBoundingBox() const;


    template<typename IT>
    void iterate( IT &it )
    {
        bool stop = false;
        for( std::vector<Path2d>::const_iterator contourIt = mContours.begin(); contourIt != mContours.end(); ++contourIt ) {
            size_t pt = 0;
            for( std::vector<Path2d::SegmentType>::const_iterator segIt = contourIt->mSegments.begin(); segIt != contourIt->mSegments.end(); ++segIt ) {
                if( ! it( *segIt, &contourIt->mPoints[pt], ( pt > 0 ) ? &contourIt->mPoints[pt-1] : 0 ) ) {
                    stop = true;
                    break;
                }
                pt += Path2d::sSegmentTypePointCounts[*segIt];
            }
            if( stop ) break;
            else if( contourIt->isClosed() ) {
                if( ! it( Path2d::CLOSE, contourIt->empty() ? NULL : &contourIt->mPoints[0], ( pt > 0 ) ? &contourIt->mPoints[pt-1] : 0 ) )
                    break;
            }
        }
    }
    
  private:
    std::vector<Path2d> mContours;
};

} // namespace cinder