/*
* Chipmunk2d::Constraint#impulse
* @return [Float]
*/
static mrb_value
constraint_get_impulse(mrb_state *mrb, mrb_value self)
{
cpConstraint *constraint;
cpFloat impulse;
constraint = mrb_data_get_ptr(mrb, self, &mrb_cp_constraint_type);
impulse = cpConstraintGetImpulse(constraint);
return mrb_float_value(mrb, impulse);
}
void Chains::BreakableJointPostSolve(cpConstraint *joint, cpSpace *space)
{
cpFloat dt = cpSpaceGetCurrentTimeStep(space);
// Convert the impulse to a force by dividing it by the timestep.
cpFloat force = cpConstraintGetImpulse(joint)/dt;
cpFloat maxForce = cpConstraintGetMaxForce(joint);
// If the force is almost as big as the joint's max force, break it.
if(force > 0.9*maxForce){
cpSpaceAddPostStepCallback(space, (cpPostStepFunc)BreakablejointPostStepRemove, joint, NULL);
}
}
cpFloat CCJoint::getImpulse()
{
return cpConstraintGetImpulse(this->m_constraint);
}
