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BVH - add option for expanded AABBs in leaves

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This PR adds a define BVH_EXPAND_LEAF_AABBS which is set, which stores expanded AABBs in the tree instead of exact AABBs.

This makes the logic less error prone when considering reciprocal collisions in the pairing, as all collision detect is now taking place between expanded AABB against expanded AABB, rather than expanded AABB against exact AABB.

The flip side of this is that the intersection tests will now be less exact when expanded margins are set.

All margins are now user customizable via project settings, and take account of collision pairing density to adjust the margin dynamically.
This commit is contained in:
lawnjelly
2021-11-18 14:32:33 +00:00
parent 4a29f657b6
commit 211dc8cd2d
10 changed files with 74 additions and 1 deletions
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4
servers/visual/visual_server_scene.cpp
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@@ -100,6 +100,7 @@ void VisualServerScene::camera_set_use_vertical_aspect(RID p_camera, bool p_enab
VisualServerScene::SpatialPartitioningScene_BVH::SpatialPartitioningScene_BVH() {
_bvh.params_set_thread_safe(GLOBAL_GET("rendering/threads/thread_safe_bvh"));
_bvh.params_set_pairing_expansion(GLOBAL_GET("rendering/quality/spatial_partitioning/bvh_collision_margin"));
}
VisualServerScene::SpatialPartitionID VisualServerScene::SpatialPartitioningScene_BVH::create(Instance *p_userdata, const AABB &p_aabb, int p_subindex, bool p_pairable, uint32_t p_pairable_type, uint32_t p_pairable_mask) {
@@ -4119,6 +4120,9 @@ VisualServerScene::VisualServerScene() {
render_pass = 1;
singleton = this;
_use_bvh = GLOBAL_DEF("rendering/quality/spatial_partitioning/use_bvh", true);
GLOBAL_DEF("rendering/quality/spatial_partitioning/bvh_collision_margin", 0.1);
ProjectSettings::get_singleton()->set_custom_property_info("rendering/quality/spatial_partitioning/bvh_collision_margin", PropertyInfo(Variant::REAL, "rendering/quality/spatial_partitioning/bvh_collision_margin", PROPERTY_HINT_RANGE, "0.0,2.0,0.01"));
_visual_server_callbacks = nullptr;
}