dc14636e68
Refactors the BVH to make it more generic and customizable. Instead of hard coding the system of pairable_mask and pairable_type into the BVH, this information is no longer stored internally, and instead the BVH uses callbacks both for determining whether pairs of objects can pair with each other, and for filtering cull / intersection tests. In addition, instead of hard coding the number of trees, the BVH now supports up to 32 trees, and each object can supply a tree collision mask to determine which trees it can collide against. This enables the BVH to scale to either the two or 3 trees needed in physics, and the single tree used without pairing in Godot 4 render tree.
138 lines
6.1 KiB
C++
138 lines
6.1 KiB
C++
/*************************************************************************/
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/* broad_phase_2d_bvh.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "broad_phase_2d_bvh.h"
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#include "collision_object_2d_sw.h"
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#include "core/project_settings.h"
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BroadPhase2DSW::ID BroadPhase2DBVH::create(CollisionObject2DSW *p_object, int p_subindex, const Rect2 &p_aabb, bool p_static) {
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uint32_t tree_id = p_static ? TREE_STATIC : TREE_DYNAMIC;
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uint32_t tree_collision_mask = p_static ? 0 : (TREE_FLAG_STATIC | TREE_FLAG_DYNAMIC);
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ID oid = bvh.create(p_object, true, tree_id, tree_collision_mask, p_aabb, p_subindex); // Pair everything, don't care?
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return oid + 1;
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}
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void BroadPhase2DBVH::move(ID p_id, const Rect2 &p_aabb) {
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bvh.move(p_id - 1, p_aabb);
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}
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void BroadPhase2DBVH::recheck_pairs(ID p_id) {
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bvh.recheck_pairs(p_id - 1);
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}
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void BroadPhase2DBVH::set_static(ID p_id, bool p_static) {
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uint32_t tree_id = p_static ? TREE_STATIC : TREE_DYNAMIC;
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uint32_t tree_collision_mask = p_static ? 0 : (TREE_FLAG_STATIC | TREE_FLAG_DYNAMIC);
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bvh.set_tree(p_id - 1, tree_id, tree_collision_mask, false);
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}
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void BroadPhase2DBVH::remove(ID p_id) {
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bvh.erase(p_id - 1);
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}
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CollisionObject2DSW *BroadPhase2DBVH::get_object(ID p_id) const {
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CollisionObject2DSW *it = bvh.get(p_id - 1);
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ERR_FAIL_COND_V(!it, nullptr);
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return it;
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}
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bool BroadPhase2DBVH::is_static(ID p_id) const {
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uint32_t tree_id = bvh.get_tree_id(p_id - 1);
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return tree_id == 0;
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}
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int BroadPhase2DBVH::get_subindex(ID p_id) const {
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return bvh.get_subindex(p_id - 1);
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}
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int BroadPhase2DBVH::cull_segment(const Vector2 &p_from, const Vector2 &p_to, CollisionObject2DSW **p_results, int p_max_results, int *p_result_indices) {
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return bvh.cull_segment(p_from, p_to, p_results, p_max_results, nullptr, 0xFFFFFFFF, p_result_indices);
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}
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int BroadPhase2DBVH::cull_aabb(const Rect2 &p_aabb, CollisionObject2DSW **p_results, int p_max_results, int *p_result_indices) {
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return bvh.cull_aabb(p_aabb, p_results, p_max_results, nullptr, 0xFFFFFFFF, p_result_indices);
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}
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void *BroadPhase2DBVH::_pair_callback(void *p_self, uint32_t p_id_A, CollisionObject2DSW *p_object_A, int p_subindex_A, uint32_t p_id_B, CollisionObject2DSW *p_object_B, int p_subindex_B) {
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BroadPhase2DBVH *bpo = (BroadPhase2DBVH *)(p_self);
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if (!bpo->pair_callback) {
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return nullptr;
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}
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return bpo->pair_callback(p_object_A, p_subindex_A, p_object_B, p_subindex_B, nullptr, bpo->pair_userdata);
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}
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void BroadPhase2DBVH::_unpair_callback(void *p_self, uint32_t p_id_A, CollisionObject2DSW *p_object_A, int p_subindex_A, uint32_t p_id_B, CollisionObject2DSW *p_object_B, int p_subindex_B, void *p_pair_data) {
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BroadPhase2DBVH *bpo = (BroadPhase2DBVH *)(p_self);
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if (!bpo->unpair_callback) {
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return;
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}
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bpo->unpair_callback(p_object_A, p_subindex_A, p_object_B, p_subindex_B, p_pair_data, bpo->unpair_userdata);
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}
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void *BroadPhase2DBVH::_check_pair_callback(void *p_self, uint32_t p_id_A, CollisionObject2DSW *p_object_A, int p_subindex_A, uint32_t p_id_B, CollisionObject2DSW *p_object_B, int p_subindex_B, void *p_pair_data) {
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BroadPhase2DBVH *bpo = (BroadPhase2DBVH *)(p_self);
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if (!bpo->pair_callback) {
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return nullptr;
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}
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return bpo->pair_callback(p_object_A, p_subindex_A, p_object_B, p_subindex_B, p_pair_data, bpo->pair_userdata);
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}
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void BroadPhase2DBVH::set_pair_callback(PairCallback p_pair_callback, void *p_userdata) {
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pair_callback = p_pair_callback;
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pair_userdata = p_userdata;
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}
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void BroadPhase2DBVH::set_unpair_callback(UnpairCallback p_unpair_callback, void *p_userdata) {
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unpair_callback = p_unpair_callback;
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unpair_userdata = p_userdata;
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}
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void BroadPhase2DBVH::update() {
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bvh.update();
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}
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BroadPhase2DSW *BroadPhase2DBVH::_create() {
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return memnew(BroadPhase2DBVH);
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}
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BroadPhase2DBVH::BroadPhase2DBVH() {
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bvh.params_set_thread_safe(GLOBAL_GET("rendering/threads/thread_safe_bvh"));
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bvh.params_set_pairing_expansion(GLOBAL_GET("physics/2d/bvh_collision_margin"));
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bvh.set_pair_callback(_pair_callback, this);
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bvh.set_unpair_callback(_unpair_callback, this);
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bvh.set_check_pair_callback(_check_pair_callback, this);
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pair_callback = nullptr;
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pair_userdata = nullptr;
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unpair_userdata = nullptr;
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}
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