cpArbiter.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.
 */


#define CP_MAX_CONTACTS_PER_ARBITER 2

CP_EXPORT cpFloat cpArbiterGetRestitution(const cpArbiter *arb);
CP_EXPORT void cpArbiterSetRestitution(cpArbiter *arb, cpFloat restitution);
CP_EXPORT cpFloat cpArbiterGetFriction(const cpArbiter *arb);
CP_EXPORT void cpArbiterSetFriction(cpArbiter *arb, cpFloat friction);

// Get the relative surface velocity of the two shapes in contact.
CP_EXPORT cpVect cpArbiterGetSurfaceVelocity(cpArbiter *arb);

// Override the relative surface velocity of the two shapes in contact.
// By default this is calculated to be the difference of the two surface velocities clamped to the tangent plane.
CP_EXPORT void cpArbiterSetSurfaceVelocity(cpArbiter *arb, cpVect vr);

CP_EXPORT cpDataPointer cpArbiterGetUserData(const cpArbiter *arb);
CP_EXPORT void cpArbiterSetUserData(cpArbiter *arb, cpDataPointer userData);

CP_EXPORT cpVect cpArbiterTotalImpulse(const cpArbiter *arb);
CP_EXPORT cpFloat cpArbiterTotalKE(const cpArbiter *arb);

CP_EXPORT cpBool cpArbiterIgnore(cpArbiter *arb);

CP_EXPORT void cpArbiterGetShapes(const cpArbiter *arb, cpShape **a, cpShape **b);

#define CP_ARBITER_GET_SHAPES(__arb__, __a__, __b__) cpShape *__a__, *__b__; cpArbiterGetShapes(__arb__, &__a__, &__b__);

CP_EXPORT void cpArbiterGetBodies(const cpArbiter *arb, cpBody **a, cpBody **b);

#define CP_ARBITER_GET_BODIES(__arb__, __a__, __b__) cpBody *__a__, *__b__; cpArbiterGetBodies(__arb__, &__a__, &__b__);

struct cpContactPointSet {
  int count;
  
  cpVect normal;
  
  struct {
    cpVect pointA, pointB;
    cpFloat distance;
  } points[CP_MAX_CONTACTS_PER_ARBITER];
};

CP_EXPORT cpContactPointSet cpArbiterGetContactPointSet(const cpArbiter *arb);

CP_EXPORT void cpArbiterSetContactPointSet(cpArbiter *arb, cpContactPointSet *set);

CP_EXPORT cpBool cpArbiterIsFirstContact(const cpArbiter *arb);
CP_EXPORT cpBool cpArbiterIsRemoval(const cpArbiter *arb);

CP_EXPORT int cpArbiterGetCount(const cpArbiter *arb);
CP_EXPORT cpVect cpArbiterGetNormal(const cpArbiter *arb);
CP_EXPORT cpVect cpArbiterGetPointA(const cpArbiter *arb, int i);
CP_EXPORT cpVect cpArbiterGetPointB(const cpArbiter *arb, int i);
CP_EXPORT cpFloat cpArbiterGetDepth(const cpArbiter *arb, int i);

CP_EXPORT cpBool cpArbiterCallWildcardBeginA(cpArbiter *arb, cpSpace *space);
CP_EXPORT cpBool cpArbiterCallWildcardBeginB(cpArbiter *arb, cpSpace *space);

CP_EXPORT cpBool cpArbiterCallWildcardPreSolveA(cpArbiter *arb, cpSpace *space);
CP_EXPORT cpBool cpArbiterCallWildcardPreSolveB(cpArbiter *arb, cpSpace *space);

CP_EXPORT void cpArbiterCallWildcardPostSolveA(cpArbiter *arb, cpSpace *space);
CP_EXPORT void cpArbiterCallWildcardPostSolveB(cpArbiter *arb, cpSpace *space);

CP_EXPORT void cpArbiterCallWildcardSeparateA(cpArbiter *arb, cpSpace *space);
CP_EXPORT void cpArbiterCallWildcardSeparateB(cpArbiter *arb, cpSpace *space);