bool Entity::collides_with(Entity* other) {
if (!can_collide || !other->can_collide) {
return false;
}
int my_collision_level = get_collision_level();
int other_collision_level = other->get_collision_level();
bounding_box rwc_bounds;
transform_into_world_coordinates(&rwc_bounds.lower, bounds.lower.x, bounds.lower.y, bounds.lower.z);
transform_into_world_coordinates(&rwc_bounds.upper, bounds.upper.x, bounds.upper.y, bounds.upper.z);
rwc_bounds.refit_for_rotation();
bounding_box other_rwc_bounds;
other->transform_into_world_coordinates(&other_rwc_bounds.lower, other->bounds.lower.x, other->bounds.lower.y, other->bounds.lower.z);
other->transform_into_world_coordinates(&other_rwc_bounds.upper, other->bounds.upper.x, other->bounds.upper.y, other->bounds.upper.z);
other_rwc_bounds.refit_for_rotation();
if (!rwc_bounds.hits(other_rwc_bounds)) {
// my big fat bounds doesn't even hit the other bounds
return false;
}
if (my_collision_level >= other_collision_level) {
return collides_with(other, &rwc_bounds, &other_rwc_bounds, my_collision_level, other_collision_level);
}
else {
return other->collides_with(this, &other_rwc_bounds, &rwc_bounds, other_collision_level, my_collision_level);
}
}
void parse(const char* json)
{
TempAllocator4096 ta;
JsonObject object(ta);
sjson::parse(json, object);
auto begin = map::begin(object);
auto end = map::end(object);
for (; begin != end; ++begin)
{
const FixedString key = begin->pair.first;
const StringId32 id = StringId32(key.data(), key.length());
map::set(_filter_map, id, new_filter_mask());
}
begin = map::begin(object);
end = map::end(object);
for (; begin != end; ++begin)
{
const FixedString key = begin->pair.first;
const char* value = begin->pair.second;
const StringId32 id = StringId32(key.data(), key.length());
TempAllocator4096 ta;
JsonObject filter(ta);
sjson::parse_object(value, filter);
JsonArray collides_with(ta);
sjson::parse_array(filter["collides_with"], collides_with);
u32 mask = 0;
for (u32 i = 0; i < array::size(collides_with); ++i)
{
const StringId32 fi = sjson::parse_string_id(collides_with[i]);
mask |= filter_to_mask(fi);
}
// Build mask
PhysicsCollisionFilter pcf;
pcf.name = id;
pcf.me = filter_to_mask(id);
pcf.mask = mask;
array::push_back(_filters, pcf);
}
}
