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include/cinder/Shape2d.h

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00001 /*
00002  Copyright (c) 2010, The Barbarian Group
00003  All rights reserved.
00004 
00005  Redistribution and use in source and binary forms, with or without modification, are permitted provided that
00006  the following conditions are met:
00007 
00008     * Redistributions of source code must retain the above copyright notice, this list of conditions and
00009     the following disclaimer.
00010     * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
00011     the following disclaimer in the documentation and/or other materials provided with the distribution.
00012 
00013  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
00014  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
00015  PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
00016  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00017  TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00018  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00019  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00020  POSSIBILITY OF SUCH DAMAGE.
00021 */
00022 
00023 #pragma once
00024 
00025 #include "cinder/Vector.h"
00026 #include "cinder/Rect.h"
00027 #include "cinder/Path2d.h"
00028 
00029 #include <vector>
00030 
00031 namespace cinder {
00032 
00033 class Shape2d {
00034   public:
00035     void    moveTo( const Vec2f &p );
00036     void    moveTo( float x, float y ) { moveTo( Vec2f( x, y ) ); }
00037     void    lineTo( const Vec2f &p );
00038     void    lineTo( float x, float y ) { lineTo( Vec2f( x, y ) ); }
00039     void    quadTo( const Vec2f &p1, const Vec2f &p2 );
00040     void    quadTo( float x1, float y1, float x2, float y2 ) { quadTo( Vec2f( x1, y1 ), Vec2f( x2, y2 ) ); }
00041     void    curveTo( const Vec2f &p1, const Vec2f &p2, const Vec2f &p3 );
00042     void    curveTo( float x1, float y1, float x2, float y2, float x3, float y3 ) { curveTo( Vec2f( x1, y1 ), Vec2f( x2, y2 ), Vec2f( x3, y3 ) ); }
00043     void    arc( const Vec2f &center, float radius, float startRadians, float endRadians, bool forward = true );
00044     void    arc( float centerX, float centerY, float radius, float startRadians, float endRadians, bool forward = true ) { arc( Vec2f( centerX, centerY ), radius, startRadians, endRadians, forward ); }
00045     void    arcTo( const Vec2f &p, const Vec2f &t, float radius );
00046     void    arcTo( float x, float y, float tanX, float tanY, float radius) { arcTo( Vec2f( x, y ), Vec2f( tanX, tanY ), radius ); }
00047     void    close();
00048     
00049     bool    empty() const { return mContours.empty(); }
00050     void    clear() { mContours.clear(); }
00051     size_t  getNumContours() const { return mContours.size(); }
00052     
00053     const Path2d&   getContour( size_t i ) const { return mContours[i]; }
00054     Path2d&         getContour( size_t i ) { return mContours[i]; }
00055     
00056     const Vec2f&    getCurrentPoint() const { return mContours.back().getCurrentPoint(); }
00057     
00058     void            removeContour( size_t i ) { mContours.erase( mContours.begin() + i ); }
00059 
00061     Rectf           calcBoundingBox() const;
00062 
00064 
00068     template<typename IT>
00069     void iterate( IT &it )
00070     {
00071         bool stop = false;
00072         for( std::vector<Path2d>::const_iterator contourIt = mContours.begin(); contourIt != mContours.end(); ++contourIt ) {
00073             size_t pt = 0;
00074             for( std::vector<Path2d::SegmentType>::const_iterator segIt = contourIt->mSegments.begin(); segIt != contourIt->mSegments.end(); ++segIt ) {
00075                 if( ! it( *segIt, &contourIt->mPoints[pt], ( pt > 0 ) ? &contourIt->mPoints[pt-1] : 0 ) ) {
00076                     stop = true;
00077                     break;
00078                 }
00079                 pt += Path2d::sSegmentTypePointCounts[*segIt];
00080             }
00081             if( stop ) break;
00082             else if( contourIt->isClosed() ) {
00083                 if( ! it( Path2d::CLOSE, contourIt->empty() ? NULL : &contourIt->mPoints[0], ( pt > 0 ) ? &contourIt->mPoints[pt-1] : 0 ) )
00084                     break;
00085             }
00086         }
00087     }
00088     
00089   private:
00090     std::vector<Path2d> mContours;
00091 };
00092 
00093 } // namespace cinder