scene = 0;
parent = 0;
name = 0;
- bvol_valid = false;
+ local_bvol_valid = false;
}
SceneNode::SceneNode(Object *obj)
scene = 0;
parent = 0;
name = 0;
- bvol_valid = false;
+ local_bvol_valid = false;
add_object(obj);
}
children.push_back(node);
node->parent = this;
node->scene = scene;
-
- bvol_valid = false;
}
bool SceneNode::remove_child(SceneNode *node)
node->parent = 0;
node->scene = 0;
children.erase(it);
-
- bvol_valid = false;
return true;
}
return false;
this->obj.push_back(obj);
obj->node = this;
- bvol_valid = false;
+ local_bvol_valid = false;
}
bool SceneNode::remove_object(Object *o)
}
obj.erase(it);
- bvol_valid = false;
+ local_bvol_valid = false;
return true;
}
return false;
}
-const Box &SceneNode::calc_bounds()
+const AABox &SceneNode::calc_local_bounds()
+{
+ local_bvol = AABox(Vec3(FLT_MAX, FLT_MAX, FLT_MAX), Vec3(-FLT_MAX, -FLT_MAX, -FLT_MAX));
+
+ // calculate the axis-aligned bounding box of all objects in this node
+ int nobj = obj.size();
+ for(int i=0; i<nobj; i++) {
+ AABox tmp = obj[i]->get_aabox();
+ calc_bounding_aabox(&local_bvol, &local_bvol, &tmp);
+ }
+
+ local_bvol_valid = true;
+ return local_bvol;
+}
+
+const AABox &SceneNode::get_local_bounds() const
{
- // TODO
+ if(!local_bvol_valid) {
+ ((SceneNode*)this)->calc_local_bounds();
+ }
+ return local_bvol;
+}
+
+AABox SceneNode::get_node_bounds() const
+{
+ get_local_bounds(); // validate local_bvol
+
+ // calculate the transformed local_bvol
+ Box node_bbox = Box(local_bvol, xform);
+
+ // then calculate the axis-aligned bounding box
+ AABox aabox;
+ calc_bounding_aabox(&aabox, &node_bbox);
+ return aabox;
}
-const Box &SceneNode::get_bounds() const
+AABox SceneNode::get_bounds() const
{
- if(!bvol_valid) {
- return ((SceneNode*)this)->calc_bounds();
+ AABox sub_aabb = AABox(Vec3(FLT_MAX, FLT_MAX, FLT_MAX), Vec3(-FLT_MAX, -FLT_MAX, -FLT_MAX));
+
+ // calculate the bounding box of all children
+ int nchild = children.size();
+ for(int i=0; i<nchild; i++) {
+ AABox tmp = children[i]->get_bounds();
+ calc_bounding_aabox(&sub_aabb, &sub_aabb, &tmp);
}
- return bvol;
+
+ AABox aabb = get_node_bounds();
+ calc_bounding_aabox(&aabb, &aabb, &sub_aabb);
+ return aabb;
}