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Merge pull request #45989 from HenryWConklin/optimize-2dphys-different-layers

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Optimize BroadPhase2dHashGrid to not pair elements on different layers
This commit is contained in:
Rémi Verschelde 2021-04-16 08:36:29 +02:00 committed by GitHub
commit dddbde82ca
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 50 additions and 40 deletions
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79
servers/physics_2d/broad_phase_2d_hash_grid.cpp
View file

@ -35,6 +35,12 @@
#define LARGE_ELEMENT_FI 1.01239812
void BroadPhase2DHashGrid::_pair_attempt(Element *p_elem, Element *p_with) {
if (p_elem->owner == p_with->owner) {
return;
}
if (!_test_collision_mask(p_elem->collision_mask, p_elem->collision_layer, p_with->collision_mask, p_with->collision_layer)) {
return;
}
Map<Element *, PairData *>::Element *E = p_elem->paired.find(p_with);
ERR_FAIL_COND(p_elem->_static && p_with->_static);
@ -49,6 +55,12 @@ void BroadPhase2DHashGrid::_pair_attempt(Element *p_elem, Element *p_with) {
}
void BroadPhase2DHashGrid::_unpair_attempt(Element *p_elem, Element *p_with) {
if (p_elem->owner == p_with->owner) {
return;
}
if (!_test_collision_mask(p_elem->collision_mask, p_elem->collision_layer, p_with->collision_mask, p_with->collision_layer)) {
return;
}
Map<Element *, PairData *>::Element *E = p_elem->paired.find(p_with);
ERR_FAIL_COND(!E); //this should really be paired..
@ -74,24 +86,22 @@ void BroadPhase2DHashGrid::_check_motion(Element *p_elem) {
bool physical_collision = p_elem->aabb.intersects(E->key()->aabb);
bool logical_collision = p_elem->owner->test_collision_mask(E->key()->owner);
if (physical_collision) {
if (!E->get()->colliding || (logical_collision && !E->get()->ud && pair_callback)) {
if (physical_collision && logical_collision) {
if (!E->get()->colliding && pair_callback) {
E->get()->ud = pair_callback(p_elem->owner, p_elem->subindex, E->key()->owner, E->key()->subindex, pair_userdata);
} else if (E->get()->colliding && !logical_collision && E->get()->ud && unpair_callback) {
unpair_callback(p_elem->owner, p_elem->subindex, E->key()->owner, E->key()->subindex, E->get()->ud, unpair_userdata);
E->get()->ud = nullptr;
}
E->get()->colliding = true;
} else { // No physcial_collision
} else { // No collision
if (E->get()->colliding && unpair_callback) {
unpair_callback(p_elem->owner, p_elem->subindex, E->key()->owner, E->key()->subindex, E->get()->ud, unpair_userdata);
E->get()->ud = nullptr;
}
E->get()->colliding = false;
}
}
}
void BroadPhase2DHashGrid::_enter_grid(Element *p_elem, const Rect2 &p_rect, bool p_static) {
void BroadPhase2DHashGrid::_enter_grid(Element *p_elem, const Rect2 &p_rect, bool p_static, bool p_force_enter) {
Vector2 sz = (p_rect.size / cell_size * LARGE_ELEMENT_FI); //use magic number to avoid floating point issues
if (sz.width * sz.height > large_object_min_surface) {
//large object, do not use grid, must check against all elements
@ -99,9 +109,6 @@ void BroadPhase2DHashGrid::_enter_grid(Element *p_elem, const Rect2 &p_rect, boo
if (E->key() == p_elem->self) {
continue; // do not pair against itself
}
if (E->get().owner == p_elem->owner) {
continue;
}
if (E->get()._static && p_static) {
continue;
}
@ -133,7 +140,7 @@ void BroadPhase2DHashGrid::_enter_grid(Element *p_elem, const Rect2 &p_rect, boo
pb = pb->next;
}
bool entered = false;
bool entered = p_force_enter;
if (!pb) {
//does not exist, create!
@ -155,17 +162,11 @@ void BroadPhase2DHashGrid::_enter_grid(Element *p_elem, const Rect2 &p_rect, boo
if (entered) {
for (Map<Element *, RC>::Element *E = pb->object_set.front(); E; E = E->next()) {
if (E->key()->owner == p_elem->owner) {
continue;
}
_pair_attempt(p_elem, E->key());
}
if (!p_static) {
for (Map<Element *, RC>::Element *E = pb->static_object_set.front(); E; E = E->next()) {
if (E->key()->owner == p_elem->owner) {
continue;
}
_pair_attempt(p_elem, E->key());
}
}
@ -179,18 +180,14 @@ void BroadPhase2DHashGrid::_enter_grid(Element *p_elem, const Rect2 &p_rect, boo
if (E->key() == p_elem) {
continue; // do not pair against itself
}
if (E->key()->owner == p_elem->owner) {
continue;
}
if (E->key()->_static && p_static) {
continue;
}
_pair_attempt(E->key(), p_elem);
}
}
void BroadPhase2DHashGrid::_exit_grid(Element *p_elem, const Rect2 &p_rect, bool p_static) {
void BroadPhase2DHashGrid::_exit_grid(Element *p_elem, const Rect2 &p_rect, bool p_static, bool p_force_exit) {
Vector2 sz = (p_rect.size / cell_size * LARGE_ELEMENT_FI);
if (sz.width * sz.height > large_object_min_surface) {
//unpair all elements, instead of checking all, just check what is already paired, so we at least save from checking static vs static
@ -229,7 +226,7 @@ void BroadPhase2DHashGrid::_exit_grid(Element *p_elem, const Rect2 &p_rect, bool
ERR_CONTINUE(!pb); //should exist!!
bool exited = false;
bool exited = p_force_exit;
if (p_static) {
if (pb->static_object_set[p_elem].dec() == 0) {
@ -245,17 +242,11 @@ void BroadPhase2DHashGrid::_exit_grid(Element *p_elem, const Rect2 &p_rect, bool
if (exited) {
for (Map<Element *, RC>::Element *E = pb->object_set.front(); E; E = E->next()) {
if (E->key()->owner == p_elem->owner) {
continue;
}
_unpair_attempt(p_elem, E->key());
}
if (!p_static) {
for (Map<Element *, RC>::Element *E = pb->static_object_set.front(); E; E = E->next()) {
if (E->key()->owner == p_elem->owner) {
continue;
}
_unpair_attempt(p_elem, E->key());
}
}
@ -288,9 +279,6 @@ void BroadPhase2DHashGrid::_exit_grid(Element *p_elem, const Rect2 &p_rect, bool
if (E->key() == p_elem) {
continue; // do not pair against itself
}
if (E->key()->owner == p_elem->owner) {
continue;
}
if (E->key()->_static && p_static) {
continue;
}
@ -306,6 +294,8 @@ BroadPhase2DHashGrid::ID BroadPhase2DHashGrid::create(CollisionObject2DSW *p_obj
Element e;
e.owner = p_object;
e._static = false;
e.collision_mask = p_object->get_collision_mask();
e.collision_layer = p_object->get_collision_layer();
e.subindex = p_subindex;
e.self = current;
e.pass = 0;
@ -319,13 +309,26 @@ void BroadPhase2DHashGrid::move(ID p_id, const Rect2 &p_aabb) {
ERR_FAIL_COND(!E);
Element &e = E->get();
bool layer_changed = e.collision_mask != e.owner->get_collision_mask() || e.collision_layer != e.owner->get_collision_layer();
if (p_aabb != e.aabb) {
if (p_aabb != e.aabb || layer_changed) {
uint32_t old_mask = e.collision_mask;
uint32_t old_layer = e.collision_layer;
if (p_aabb != Rect2()) {
_enter_grid(&e, p_aabb, e._static);
e.collision_mask = e.owner->get_collision_mask();
e.collision_layer = e.owner->get_collision_layer();
_enter_grid(&e, p_aabb, e._static, layer_changed);
}
if (e.aabb != Rect2()) {
_exit_grid(&e, e.aabb, e._static);
// Need _exit_grid to remove from cells based on the old layer values.
e.collision_mask = old_mask;
e.collision_layer = old_layer;
_exit_grid(&e, e.aabb, e._static, layer_changed);
e.collision_mask = e.owner->get_collision_mask();
e.collision_layer = e.owner->get_collision_layer();
}
e.aabb = p_aabb;
}
@ -344,13 +347,13 @@ void BroadPhase2DHashGrid::set_static(ID p_id, bool p_static) {
}
if (e.aabb != Rect2()) {
_exit_grid(&e, e.aabb, e._static);
_exit_grid(&e, e.aabb, e._static, false);
}
e._static = p_static;
if (e.aabb != Rect2()) {
_enter_grid(&e, e.aabb, e._static);
_enter_grid(&e, e.aabb, e._static, false);
_check_motion(&e);
}
}
@ -362,7 +365,7 @@ void BroadPhase2DHashGrid::remove(ID p_id) {
Element &e = E->get();
if (e.aabb != Rect2()) {
_exit_grid(&e, e.aabb, e._static);
_exit_grid(&e, e.aabb, e._static, false);
}
element_map.erase(p_id);

11
servers/physics_2d/broad_phase_2d_hash_grid.h
View file

@ -51,6 +51,9 @@ class BroadPhase2DHashGrid : public BroadPhase2DSW {
CollisionObject2DSW *owner;
bool _static;
Rect2 aabb;
// Owner's collision_mask/layer, used to detect changes in layers.
uint32_t collision_mask;
uint32_t collision_layer;
int subindex;
uint64_t pass;
Map<Element *, PairData *> paired;
@ -115,8 +118,12 @@ class BroadPhase2DHashGrid : public BroadPhase2DSW {
UnpairCallback unpair_callback;
void *unpair_userdata;
void _enter_grid(Element *p_elem, const Rect2 &p_rect, bool p_static);
void _exit_grid(Element *p_elem, const Rect2 &p_rect, bool p_static);
static _FORCE_INLINE_ bool _test_collision_mask(uint32_t p_mask1, uint32_t p_layer1, uint32_t p_mask2, uint32_t p_layer2) {
return p_mask1 & p_layer2 || p_mask2 & p_layer1;
}
void _enter_grid(Element *p_elem, const Rect2 &p_rect, bool p_static, bool p_force_enter);
void _exit_grid(Element *p_elem, const Rect2 &p_rect, bool p_static, bool p_force_exit);
template <bool use_aabb, bool use_segment>
_FORCE_INLINE_ void _cull(const Point2i p_cell, const Rect2 &p_aabb, const Point2 &p_from, const Point2 &p_to, CollisionObject2DSW **p_results, int p_max_results, int *p_result_indices, int &index);