cpPolyline.h

/* Copyright (c) 2025 Victor Blomqvist
 * Copyright (c) 2007-2024 Scott Lembcke and Howling Moon Software
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 * SOFTWARE.
*/
 
// This was previsoly part of the non-open source Chipmunk Pro.
// See https://github.com/slembcke/Chipmunk2D/issues/221 for the change of license
// and http://chipmunk2d.net/legal.php for more information on previous licenses.
 
 
#ifdef __cplusplus
extern "C" {
#endif
 
// Polylines are just arrays of vertexes.
// They are looped if the first vertex is equal to the last.
// cpPolyline structs are intended to be passed by value and destroyed when you are done with them.
typedef struct cpPolyline {
  int count, capacity;
  cpVect verts[];
} cpPolyline;
 
CP_EXPORT void cpPolylineFree(cpPolyline *line);
 
CP_EXPORT cpBool cpPolylineIsClosed(cpPolyline *line);
 
CP_EXPORT cpPolyline *cpPolylineSimplifyCurves(cpPolyline *line, cpFloat tol);
 
CP_EXPORT cpPolyline *cpPolylineSimplifyVertexes(cpPolyline *line, cpFloat tol);
 
CP_EXPORT cpPolyline *cpPolylineToConvexHull(cpPolyline *line, cpFloat tol);
 
 
typedef struct cpPolylineSet {
  int count, capacity;
  cpPolyline **lines;
} cpPolylineSet;
 
CP_EXPORT cpPolylineSet *cpPolylineSetAlloc(void);
 
CP_EXPORT cpPolylineSet *cpPolylineSetInit(cpPolylineSet *set);
 
CP_EXPORT cpPolylineSet *cpPolylineSetNew(void);
 
CP_EXPORT void cpPolylineSetDestroy(cpPolylineSet *set, cpBool freePolylines);
 
CP_EXPORT void cpPolylineSetFree(cpPolylineSet *set, cpBool freePolylines);
 
CP_EXPORT void cpPolylineSetCollectSegment(cpVect v0, cpVect v1, cpPolylineSet *lines);
 
CP_EXPORT cpPolylineSet *cpPolylineConvexDecomposition(cpPolyline *line, cpFloat tol);
 
#define cpPolylineConvexDecomposition_BETA cpPolylineConvexDecomposition
 
#ifdef __cplusplus
}
#endif