bevtrap.h

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00001 // $Id: bevtrap.h 751 2006-03-31 15:43:49Z alex $
00002 /* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
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00004  
00005                Xara LX, a vector drawing and manipulation program.
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00097  */
00098 #ifndef _BEVTRAP_H
00099 #define _BEVTRAP_H
00100 
00101 #include "pathproc.h"
00102 #include "pathtrap.h"
00103 
00104 
00105 class CCreateBevelTrapezoids : public CCObject
00106 {
00107     CC_DECLARE_DYNCREATE(CCreateBevelTrapezoids);
00108 
00109 public:
00110     // creates the bevel trap list
00111     BOOL ProcessTrapsForBevelling(Path *pPath, TrapsList *RetnTraps, INT32 indent, JointType jType,
00112                             BOOL bOuter);
00113 
00114     // gives the inner point from a trap edge and puts it in dc
00115     static void CalcInnerPoint(TrapEdge * pEdge, INT32 indent, DocCoord * dc, BOOL bOuter);
00116     
00117 #ifdef _DEBUG
00118     static void DumpList(TrapsList * pList);
00119 #endif
00120 
00121     static BOOL CalculateIntersection(const DocCoord * start1, const NormCoord * dir1,
00122                                                    const DocCoord * start2, const NormCoord * dir2,
00123                                                    DocCoord * point, double * p, double * q);
00124 
00125     static void GetPathFromTraps(TrapsList * pTraps, const MILLIPOINT Width, Path * pPath);
00126 
00127     // elimintates the multiple points in the path
00128     static BOOL EliminateMultpilePoints(Path * pSrc, Path * pDest); 
00129 
00130     // calculates the intersection between two lines
00131 private:
00132 
00133     // is this an outer turn on the path ?
00134     BOOL IsOuterTurn(NormCoord * nc1, NormCoord * nc2);
00135 
00136     // adds a given edge to the list
00137     BOOL AddEdgeToList(TrapEdgeList * pList, DocCoord * Centre, NormCoord * Normal, double Position,
00138                             NormCoord * pNormal2=NULL);
00139 
00140     // smooths off the corners (otherwise they come out as being jaggy
00141     BOOL SmoothCorners(TrapsList * pList, TrapsList * RetnList, double Indent, BOOL bOuterBevel);
00142 
00143     // offsets index by 'offset', with maximum value being max-1
00144     // used to circle around the paths
00145     INT32 AlterIndex(INT32 index, INT32 max, INT32 offset);
00146 
00147     // creates the traps from the path
00148     BOOL ProcessPath(Path * pPath, TrapsList *RetnTraps, INT32 indent, BOOL bOuter, JointType jType);
00149 
00150     // creates a round join (recursive)
00151     void CreateRoundJoin(TrapEdgeList * pList, DocCoord * pCentre, 
00152                                              NormCoord * pStartNorm, NormCoord * pEndNorm, 
00153                                              INT32 depth = 0);
00154 
00155     // makes sure all inner points are at a consistant distance from the original path
00156     // based on where the outer points are
00157     void FlattenInnerPoints(TrapEdgeList * pList, INT32 indent, BOOL bOuter);
00158 
00159     // adds edges between centre 1 and centre 2 with the same inner point
00160     void RecursivelyAddEdges(TrapEdgeList * pList, DocCoord * pCentre1, DocCoord * pCentre2,
00161                              DocCoord * pInnerPoint, double MOneDivIndent, INT32 depth = 0);
00162 
00163 } ;
00164 
00165 #endif

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