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BVH - fix leaking leaves

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In the BVH leaf nodes are a combination of two objects - a node object, and a leaf object. Testing revealed that in some situations node objects could be freed without also freeing the paired leaf object. This closes this bug.
This commit is contained in:
lawnjelly 2022-02-02 19:35:30 +00:00
parent 821a1a1882
commit 90bea27e82
1 changed files with 15 additions and 3 deletions
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18
core/math/bvh_tree.h
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@ -262,7 +262,7 @@ private:
change_root_node(sibling_id, p_tree_id); change_root_node(sibling_id, p_tree_id);
// delete the old root node as no longer needed // delete the old root node as no longer needed
_nodes.free(p_parent_id); node_free_node_and_leaf(p_parent_id);
} }
return; return;
@ -275,7 +275,19 @@ private:
} }
// put the node on the free list to recycle // put the node on the free list to recycle
_nodes.free(p_parent_id); node_free_node_and_leaf(p_parent_id);
}
// A node can either be a node, or a node AND a leaf combo.
// Both must be deleted to prevent a leak.
void node_free_node_and_leaf(uint32_t p_node_id) {
TNode &node = _nodes[p_node_id];
if (node.is_leaf()) {
int leaf_id = node.get_leaf_id();
_leaves.free(leaf_id);
}
_nodes.free(p_node_id);
} }
void change_root_node(uint32_t p_new_root_id, uint32_t p_tree_id) { void change_root_node(uint32_t p_new_root_id, uint32_t p_tree_id) {
@ -367,7 +379,7 @@ private:
refit_upward(parent_id); refit_upward(parent_id);
// put the node on the free list to recycle // put the node on the free list to recycle
_nodes.free(owner_node_id); node_free_node_and_leaf(owner_node_id);
} }
// else if no parent, it is the root node. Do not delete // else if no parent, it is the root node. Do not delete