// $Id: pathutil.h 751 2006-03-31 15:43:49Z alex $ /* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE ================================XARAHEADERSTART=========================== Xara LX, a vector drawing and manipulation program. Copyright (C) 1993-2006 Xara Group Ltd. Copyright on certain contributions may be held in joint with their respective authors. See AUTHORS file for details. LICENSE TO USE AND MODIFY SOFTWARE ---------------------------------- This file is part of Xara LX. Xara LX is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation. Xara LX and its component source files are distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. 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Xara Group Ltd, Gaddesden Place, Hemel Hempstead, HP2 6EX, UK. http://www.xara.com/ =================================XARAHEADEREND============================ */ // Header file for PathUtil.Cpp. Defines a class of related static // functions which can be used for path element manipulation. #ifndef INC_PATHUTILS #define INC_PATHUTILS const double SPLIT_EPSILON = 0.00005; // define a structure to hold a single set of curve coefficients typedef struct { double ax,ay; double bx,by; double cx,cy; } PtCoefs; // define a structure for single points typedef struct { double x, y; } Point2; typedef Point2 Vector2; #define SGN(a) (((a)<0) ? -1 : 0) // Used by SqrDistanceToCurve only! #define MIN(a,b) (((a)<(b))?(a):(b)) // " #define MAX(a,b) (((a)>(b))?(a):(b)) // " /******************************************************************************************** > class PathUtil Author: Mike_Kenny (Xara Group Ltd) Created: 24/8/94 Purpose: Base class for path utility static functions. These functions operate on sections of paths, ie lists of doc coords, but do not process complete paths and hence cannot be included as member functions of the paths class. The class contains no member variables, just static member functions which would otherwise be global if not for the fabby idea of encompasing them together under a class structure. ********************************************************************************************/ class PathUtil { public: static BOOL SplitLine(const double, const DocCoord*, UINT32*, PathVerb*, DocCoord* ); static BOOL SplitCurve(const double, const DocCoord*, UINT32*, PathVerb*, DocCoord* ); static void GetCurveCoefs(const DocCoord*, PtCoefs* ); static DocCoord PointOnLine(const double, const DocCoord*); static DocCoord PointOnSemiCircle(const DocCoord& centre, const DocCoord& radialp, double t); static DocCoord PointOnCurve(double, const DocCoord*); static double SqrDistance(const DocCoord& p1, const DocCoord& p2); static double SqrDistanceToLine(const DocCoord*, const DocCoord&, double* ); static double SqrDistanceToSemiCircle(const DocCoord*, const DocCoord&, double*); static double SqrDistanceToCurve(const UINT32, const DocCoord*, const DocCoord&, double* ); // old square distance to curve code // static double SqrDistanceToCurve(const UINT32, const DocCoord*, const DocCoord&, double* ); // static double CurveClosestRange(const UINT32, PtCoefs*, const DocCoord&, double dx, double dy ,double* t,double* t0,double* t1); }; #endif