cpShape.h

/* Copyright (c) 2013 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
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */


typedef struct cpPointQueryInfo {
  const cpShape *shape;
  cpVect point;
  cpFloat distance;
  cpVect gradient;
} cpPointQueryInfo;

typedef struct cpSegmentQueryInfo {
  const cpShape *shape;
  cpVect point;
  cpVect normal;
  cpFloat alpha;
} cpSegmentQueryInfo;

typedef struct cpShapeFilter {
  cpGroup group;
  cpBitmask categories;
  cpBitmask mask;
} cpShapeFilter;

static const cpShapeFilter CP_SHAPE_FILTER_ALL = {CP_NO_GROUP, CP_ALL_CATEGORIES, CP_ALL_CATEGORIES};
static const cpShapeFilter CP_SHAPE_FILTER_NONE = {CP_NO_GROUP, ~CP_ALL_CATEGORIES, ~CP_ALL_CATEGORIES};

static inline cpShapeFilter
cpShapeFilterNew(cpGroup group, cpBitmask categories, cpBitmask mask)
{
  cpShapeFilter filter = {group, categories, mask};
  return filter;
}

CP_EXPORT void cpShapeDestroy(cpShape *shape);
CP_EXPORT void cpShapeFree(cpShape *shape);

CP_EXPORT cpBB cpShapeCacheBB(cpShape *shape);
CP_EXPORT cpBB cpShapeUpdate(cpShape *shape, cpTransform transform);

CP_EXPORT cpFloat cpShapePointQuery(const cpShape *shape, cpVect p, cpPointQueryInfo *out);

CP_EXPORT cpBool cpShapeSegmentQuery(const cpShape *shape, cpVect a, cpVect b, cpFloat radius, cpSegmentQueryInfo *info);

CP_EXPORT cpContactPointSet cpShapesCollide(const cpShape *a, const cpShape *b);

CP_EXPORT cpSpace* cpShapeGetSpace(const cpShape *shape);

CP_EXPORT cpBody* cpShapeGetBody(const cpShape *shape);
CP_EXPORT void cpShapeSetBody(cpShape *shape, cpBody *body);

cpFloat cpShapeGetMass(cpShape *shape);
CP_EXPORT void cpShapeSetMass(cpShape *shape, cpFloat mass);

CP_EXPORT cpFloat cpShapeGetDensity(cpShape *shape);
CP_EXPORT void cpShapeSetDensity(cpShape *shape, cpFloat density);

CP_EXPORT cpFloat cpShapeGetMoment(cpShape *shape);
CP_EXPORT cpFloat cpShapeGetArea(cpShape *shape);
CP_EXPORT cpVect cpShapeGetCenterOfGravity(cpShape *shape);

CP_EXPORT cpBB cpShapeGetBB(const cpShape *shape);

CP_EXPORT cpBool cpShapeGetSensor(const cpShape *shape);
CP_EXPORT void cpShapeSetSensor(cpShape *shape, cpBool sensor);

CP_EXPORT cpFloat cpShapeGetElasticity(const cpShape *shape);
CP_EXPORT void cpShapeSetElasticity(cpShape *shape, cpFloat elasticity);

CP_EXPORT cpFloat cpShapeGetFriction(const cpShape *shape);
CP_EXPORT void cpShapeSetFriction(cpShape *shape, cpFloat friction);

CP_EXPORT cpVect cpShapeGetSurfaceVelocity(const cpShape *shape);
CP_EXPORT void cpShapeSetSurfaceVelocity(cpShape *shape, cpVect surfaceVelocity);

CP_EXPORT cpDataPointer cpShapeGetUserData(const cpShape *shape);
CP_EXPORT void cpShapeSetUserData(cpShape *shape, cpDataPointer userData);

CP_EXPORT cpCollisionType cpShapeGetCollisionType(const cpShape *shape);
CP_EXPORT void cpShapeSetCollisionType(cpShape *shape, cpCollisionType collisionType);

CP_EXPORT cpShapeFilter cpShapeGetFilter(const cpShape *shape);
CP_EXPORT void cpShapeSetFilter(cpShape *shape, cpShapeFilter filter);



CP_EXPORT cpCircleShape* cpCircleShapeAlloc(void);
CP_EXPORT cpCircleShape* cpCircleShapeInit(cpCircleShape *circle, cpBody *body, cpFloat radius, cpVect offset);
CP_EXPORT cpShape* cpCircleShapeNew(cpBody *body, cpFloat radius, cpVect offset);

CP_EXPORT cpVect cpCircleShapeGetOffset(const cpShape *shape);
CP_EXPORT cpFloat cpCircleShapeGetRadius(const cpShape *shape);


CP_EXPORT cpSegmentShape* cpSegmentShapeAlloc(void);
CP_EXPORT cpSegmentShape* cpSegmentShapeInit(cpSegmentShape *seg, cpBody *body, cpVect a, cpVect b, cpFloat radius);
CP_EXPORT cpShape* cpSegmentShapeNew(cpBody *body, cpVect a, cpVect b, cpFloat radius);

CP_EXPORT void cpSegmentShapeSetNeighbors(cpShape *shape, cpVect prev, cpVect next);

CP_EXPORT cpVect cpSegmentShapeGetA(const cpShape *shape);
CP_EXPORT cpVect cpSegmentShapeGetB(const cpShape *shape);
CP_EXPORT cpVect cpSegmentShapeGetNormal(const cpShape *shape);
CP_EXPORT cpFloat cpSegmentShapeGetRadius(const cpShape *shape);