static void _set_type(PhysicsInfo *info, PhysicsBody type)
{
if (info->type == type)
return; /* already set */
info->type = type;
switch (type)
{
case PB_KINEMATIC:
info->last_pos = cpBodyGetPos(info->body);
info->last_ang = cpBodyGetAngle(info->body);
/* fall through */
case PB_STATIC:
if (!cpBodyIsStatic(info->body))
{
cpSpaceRemoveBody(space, info->body);
cpSpaceConvertBodyToStatic(space, info->body);
}
break;
case PB_DYNAMIC:
cpSpaceConvertBodyToDynamic(space, info->body, info->mass, 1.0);
cpSpaceAddBody(space, info->body);
_recalculate_moment(info);
break;
}
}
void PhysicsBody::setDynamic(bool dynamic)
{
if (dynamic != _dynamic)
{
_dynamic = dynamic;
if (dynamic)
{
if (_world && _cpBody->CP_PRIVATE(space))
{
cpSpaceConvertBodyToDynamic(_world->_cpSpace, _cpBody, _mass, _moment);
cpSpaceAddBody(_world->_cpSpace, _cpBody);
}
else
{
cpBodySetMass(_cpBody, _mass);
cpBodySetMoment(_cpBody, _moment);
}
}
else
{
if (_world && _cpBody->CP_PRIVATE(space))
{
cpSpaceRemoveBody(_world->_cpSpace, _cpBody);
cpSpaceConvertBodyToStatic(_world->_cpSpace, _cpBody);
}
else
{
cpBodySetMass(_cpBody, PHYSICS_INFINITY);
cpBodySetMoment(_cpBody, PHYSICS_INFINITY);
cpBodySetVel(_cpBody, cpvzero);
cpBodySetAngVel(_cpBody, 0.0);
}
}
}
}
static void
update(cpSpace *space, double dt)
{
if(ChipmunkDemoRightDown){
cpShape *nearest = cpSpaceNearestPointQueryNearest(space, ChipmunkDemoMouse, 0.0, GRABABLE_MASK_BIT, CP_NO_GROUP, NULL);
if(nearest){
cpBody *body = cpShapeGetBody(nearest);
if(cpBodyIsStatic(body)){
cpSpaceConvertBodyToDynamic(space, body, pentagon_mass, pentagon_moment);
cpSpaceAddBody(space, body);
} else {
cpSpaceRemoveBody(space, body);
cpSpaceConvertBodyToStatic(space, body);
}
}
}
cpSpaceStep(space, dt);
cpSpaceEachBody(space, &eachBody, NULL);
}
