/*
* Chipmunk2d::SlideJoint#anchor_a
* @return [Chipmunk2d::Vect]
*/
static mrb_value
slide_joint_get_anchor_a(mrb_state* mrb, mrb_value self)
{
cpConstraint* constraint;
cpVect anchor_a;
Data_Get_Struct(mrb, self, &mrb_cp_constraint_type, constraint);
anchor_a = cpSlideJointGetAnchorA(constraint);
return mrb_cp_vect_value(mrb, anchor_a);
}
static void DrawConstraint(cpConstraint *constraint, DrawNode *renderer)
{
cpBody *body_a = cpConstraintGetBodyA(constraint);
cpBody *body_b = cpConstraintGetBodyB(constraint);
if(cpConstraintIsPinJoint(constraint))
{
cpVect a = cpvadd(cpBodyGetPosition(body_a), cpvrotate(cpPinJointGetAnchorA(constraint), cpBodyGetRotation(body_a)));
cpVect b = cpvadd(cpBodyGetPosition(body_b), cpvrotate(cpPinJointGetAnchorB(constraint), cpBodyGetRotation(body_b)));
renderer->drawDot(cpVert2Point(a), 3.0, CONSTRAINT_COLOR);
renderer->drawDot(cpVert2Point(b), 3.0, CONSTRAINT_COLOR);
renderer->drawSegment(cpVert2Point(a), cpVert2Point(b), 1.0, CONSTRAINT_COLOR);
}
else if(cpConstraintIsSlideJoint(constraint))
{
cpVect a = cpvadd(cpBodyGetPosition(body_a), cpvrotate(cpSlideJointGetAnchorA(constraint), cpBodyGetRotation(body_a)));
cpVect b = cpvadd(cpBodyGetPosition(body_b), cpvrotate(cpSlideJointGetAnchorB(constraint), cpBodyGetRotation(body_b)));
renderer->drawDot(cpVert2Point(a), 3.0, CONSTRAINT_COLOR);
renderer->drawDot(cpVert2Point(b), 3.0, CONSTRAINT_COLOR);
renderer->drawSegment(cpVert2Point(a), cpVert2Point(b), 1.0, CONSTRAINT_COLOR);
}
else if(cpConstraintIsPivotJoint(constraint))
{
cpVect a = cpvadd(cpBodyGetPosition(body_a), cpvrotate(cpPivotJointGetAnchorA(constraint), cpBodyGetRotation(body_a)));
cpVect b = cpvadd(cpBodyGetPosition(body_b), cpvrotate(cpPivotJointGetAnchorB(constraint), cpBodyGetRotation(body_b)));
renderer->drawDot(cpVert2Point(a), 3.0, CONSTRAINT_COLOR);
renderer->drawDot(cpVert2Point(b), 3.0, CONSTRAINT_COLOR);
}
else if(cpConstraintIsGrooveJoint(constraint))
{
cpVect a = cpvadd(cpBodyGetPosition(body_a), cpvrotate(cpGrooveJointGetGrooveA(constraint), cpBodyGetRotation(body_a)));
cpVect b = cpvadd(cpBodyGetPosition(body_a), cpvrotate(cpGrooveJointGetGrooveB(constraint), cpBodyGetRotation(body_a)));
cpVect c = cpvadd(cpBodyGetPosition(body_b), cpvrotate(cpGrooveJointGetAnchorB(constraint), cpBodyGetRotation(body_b)));
renderer->drawDot(cpVert2Point(c), 3.0, CONSTRAINT_COLOR);
renderer->drawSegment(cpVert2Point(a), cpVert2Point(b), 1.0, CONSTRAINT_COLOR);
}
else if(cpConstraintIsDampedSpring(constraint))
{
// TODO: uninplemented
}
else
{
// printf("Cannot draw constraint\n");
}
}
