/*
* @param [Integer] i i-th contact point
* @return [Chipmunk2d::Vect]
*/
static mrb_value
arbiter_get_normal(mrb_state* mrb, mrb_value self)
{
cpArbiter* arbiter;
arbiter = mrb_cp_get_arbiter_ptr(mrb, self);
return mrb_cp_vect_value(mrb, cpArbiterGetNormal(arbiter));
}
static void updateGrounded(cpBody* body, cpArbiter* arb, bool* grounded)
{
cpVect n = cpArbiterGetNormal(arb, 0);
if (n.y < 0)
{
*grounded = true;
}
}
static void
SelectPlayerGroundNormal(cpBody *body, cpArbiter *arb, cpVect *groundNormal){
cpVect n = cpArbiterGetNormal(arb);
if(n.y > groundNormal->y){
(*groundNormal) = n;
}
}
static cpBool
PreSolve(cpArbiter *arb, cpSpace *space, void *ignore)
{
CP_ARBITER_GET_SHAPES(arb, a, b);
OneWayPlatform *platform = (OneWayPlatform *)cpShapeGetUserData(a);
if(cpvdot(cpArbiterGetNormal(arb), platform->n) < 0){
return cpArbiterIgnore(arb);
}
return cpTrue;
}
static cpBool
preSolve(cpArbiter *arb, cpSpace *space, void *ignore)
{
CP_ARBITER_GET_SHAPES(arb, a, b);
OneWayPlatform *platform = (OneWayPlatform *)a->data;
if(cpvdot(cpArbiterGetNormal(arb, 0), platform->n) < 0){
cpArbiterIgnore(arb);
return cpFalse;
}
return cpTrue;
}
static int
begin(cpArbiter *arb, cpSpace *space, void *ignore)
{
CP_ARBITER_GET_SHAPES(arb, a, b);
PlayerStruct *player = a->data;
cpVect n = cpvneg(cpArbiterGetNormal(arb, 0));
if(n.y > 0.0f){
cpArrayPush(player->groundShapes, b);
}
return 1;
}
static int
preSolve(cpArbiter *arb, cpSpace *space, void *ignore)
{
CP_ARBITER_GET_SHAPES(arb, a, b);
PlayerStruct *player = a->data;
if(arb->stamp > 0){
a->u = player->u;
// pick the most upright jump normal each frame
cpVect n = cpvneg(cpArbiterGetNormal(arb, 0));
if(n.y >= player->groundNormal.y){
player->groundNormal = n;
}
}
return 1;
}
void PhysicsContact::generateContactData()
{
if (_contactInfo == nullptr)
{
return;
}
cpArbiter* arb = static_cast<cpArbiter*>(_contactInfo);
CC_SAFE_DELETE(_preContactData);
_preContactData = _contactData;
_contactData = new (std::nothrow) PhysicsContactData();
_contactData->count = cpArbiterGetCount(arb);
for (int i=0; i<_contactData->count && i<PhysicsContactData::POINT_MAX; ++i)
{
_contactData->points[i] = PhysicsHelper::cpv2point(cpArbiterGetPoint(arb, i));
}
_contactData->normal = _contactData->count > 0 ? PhysicsHelper::cpv2point(cpArbiterGetNormal(arb, 0)) : Vec2::ZERO;
}
cVect cArbiter::GetNormal( int i ) {
return tovect( cpArbiterGetNormal( mArbiter, i ) );
}
JNIEXPORT jfloat JNICALL Java_com_wiyun_engine_chipmunk_Arbiter_getNormalY
(JNIEnv * env, jobject thiz, jint contactIndex) {
cpArbiter* arb = (cpArbiter*)env->GetIntField(thiz, g_fid_Arbiter_mPointer);
cpVect v = cpArbiterGetNormal(arb, contactIndex);
return v.y;
}
void wrArbiterGetNormal(cpArbiter *arb, cpVect *ret) {
*ret = cpArbiterGetNormal(arb, 0);
}
static int cpArbiter_getNormal(lua_State *L) {
cpArbiter *arb = toarbiter(L);
push_cpVect(L, cpArbiterGetNormal(arb, 0));
return 2;
}
int modArbiterGetNormal(INSTANCE * my, int * params){
cpVect v=cpArbiterGetNormal((cpArbiter *)params[0],params[1]);
*(float*)params[2]=v.x;
*(float*)params[3]=v.y;
return 1;
}