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/BSpline.h" 00027 #include "cinder/Rect.h" 00028 #include "cinder/Exception.h" 00029 00030 #include <vector> 00031 00032 namespace cinder { 00033 00034 class Path2d { 00035 public: 00036 Path2d() : mClosed( false ) {} 00037 explicit Path2d( const BSpline<Vec2f> &spline, float subdivisionStep = 0.01f ); 00038 00039 void moveTo( const Vec2f &p ); 00040 void moveTo( float x, float y ) { moveTo( Vec2f( x, y ) ); } 00041 void lineTo( const Vec2f &p ); 00042 void lineTo( float x, float y ) { lineTo( Vec2f( x, y ) ); } 00043 void quadTo( const Vec2f &p1, const Vec2f &p2 ); 00044 void quadTo( float x1, float y1, float x2, float y2 ) { quadTo( Vec2f( x1, y1 ), Vec2f( x2, y2 ) ); } 00045 void curveTo( const Vec2f &p1, const Vec2f &p2, const Vec2f &p3 ); 00046 void curveTo( float x1, float y1, float x2, float y2, float x3, float y3 ) { curveTo( Vec2f( x1, y1 ), Vec2f( x2, y2 ), Vec2f( x3, y3 ) ); } 00047 void arc( const Vec2f ¢er, float radius, float startRadians, float endRadians, bool forward = true ); 00048 void arc( float centerX, float centerY, float radius, float startRadians, float endRadians, bool forward = true ) { arc( Vec2f( centerX, centerY ), radius, startRadians, endRadians, forward ); } 00049 void arcTo( const Vec2f &p, const Vec2f &t, float radius ); 00050 void arcTo( float x, float y, float tanX, float tanY, float radius) { arcTo( Vec2f( x, y ), Vec2f( tanX, tanY ), radius ); } 00051 00052 void close() { mClosed = true; } 00053 bool isClosed() const { return mClosed; } 00054 00055 bool empty() const { return mSegments.empty(); } 00056 void clear() { mSegments.clear(); mPoints.clear(); } 00057 size_t getNumSegments() const { return mSegments.size(); } 00058 size_t getNumPoints() const { return mPoints.size(); } 00059 00060 const Vec2f& getPoint( size_t point ) const { return mPoints[point]; } 00061 const Vec2f& getCurrentPoint() const { return mPoints.back(); } 00062 void setPoint( size_t index, const Vec2f &p ) { mPoints[index] = p; } 00063 00064 void removeSegment( size_t segment ); 00065 00066 enum SegmentType { MOVETO, LINETO, QUADTO, CUBICTO, CLOSE }; 00067 static const int sSegmentTypePointCounts[]; 00068 SegmentType getSegmentType( size_t segment ) const { return mSegments[segment]; } 00069 00070 friend class Shape2d; 00071 00072 private: 00073 void arcHelper( const Vec2f ¢er, float radius, float startRadians, float endRadians, bool forward ); 00074 void arcSegmentAsCubicBezier( const Vec2f ¢er, float radius, float startRadians, float endRadins ); 00075 00076 bool mClosed; 00077 std::vector<Vec2f> mPoints; 00078 std::vector<SegmentType> mSegments; 00079 }; 00080 00081 class Path2dExc : public Exception { 00082 }; 00083 00084 } // namespace cinder