godot/servers/physics_2d/broad_phase_2d_basic.cpp

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2014-02-10 09:10:30 +08:00
/*************************************************************************/
/* broad_phase_2d_basic.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "broad_phase_2d_basic.h"
ID BroadPhase2DBasic::create(CollisionObject2DSW *p_object_, int p_subindex) {
current++;
Element e;
e.owner=p_object_;
e._static=false;
e.subindex=p_subindex;
element_map[current]=e;
return current;
}
void BroadPhase2DBasic::move(ID p_id, const Rect2& p_aabb) {
Map<ID,Element>::Element *E=element_map.find(p_id);
ERR_FAIL_COND(!E);
E->get().aabb=p_aabb;
}
void BroadPhase2DBasic::set_static(ID p_id, bool p_static) {
Map<ID,Element>::Element *E=element_map.find(p_id);
ERR_FAIL_COND(!E);
E->get()._static=p_static;
}
void BroadPhase2DBasic::remove(ID p_id) {
Map<ID,Element>::Element *E=element_map.find(p_id);
ERR_FAIL_COND(!E);
element_map.erase(E);
}
CollisionObject2DSW *BroadPhase2DBasic::get_object(ID p_id) const {
const Map<ID,Element>::Element *E=element_map.find(p_id);
ERR_FAIL_COND_V(!E,NULL);
return E->get().owner;
}
bool BroadPhase2DBasic::is_static(ID p_id) const {
const Map<ID,Element>::Element *E=element_map.find(p_id);
ERR_FAIL_COND_V(!E,false);
return E->get()._static;
}
int BroadPhase2DBasic::get_subindex(ID p_id) const {
const Map<ID,Element>::Element *E=element_map.find(p_id);
ERR_FAIL_COND_V(!E,-1);
return E->get().subindex;
}
int BroadPhase2DBasic::cull_segment(const Vector2& p_from, const Vector2& p_to,CollisionObject2DSW** p_results,int p_max_results,int *p_result_indices) {
int rc=0;
for (Map<ID,Element>::Element *E=element_map.front();E;E=E->next()) {
const Rect2 aabb=E->get().aabb;
if (aabb.intersects_segment(p_from,p_to)) {
p_results[rc]=E->get().owner;
p_result_indices[rc]=E->get().subindex;
rc++;
if (rc>=p_max_results)
break;
}
}
return rc;
}
int BroadPhase2DBasic::cull_aabb(const Rect2& p_aabb,CollisionObject2DSW** p_results,int p_max_results,int *p_result_indices) {
int rc=0;
for (Map<ID,Element>::Element *E=element_map.front();E;E=E->next()) {
const Rect2 aabb=E->get().aabb;
if (aabb.intersects(p_aabb)) {
p_results[rc]=E->get().owner;
p_result_indices[rc]=E->get().subindex;
rc++;
if (rc>=p_max_results)
break;
}
}
return rc;
}
void BroadPhase2DBasic::set_pair_callback(PairCallback p_pair_callback,void *p_userdata) {
pair_userdata=p_userdata;
pair_callback=p_pair_callback;
}
void BroadPhase2DBasic::set_unpair_callback(UnpairCallback p_pair_callback,void *p_userdata) {
unpair_userdata=p_userdata;
unpair_callback=p_pair_callback;
}
void BroadPhase2DBasic::update() {
// recompute pairs
for(Map<ID,Element>::Element *I=element_map.front();I;I=I->next()) {
for(Map<ID,Element>::Element *J=I->next();J;J=J->next()) {
Element *elem_A=&I->get();
Element *elem_B=&J->get();
if (elem_A->owner == elem_B->owner)
continue;
bool pair_ok=elem_A->aabb.intersects( elem_B->aabb ) && (!elem_A->_static || !elem_B->_static );
PairKey key(I->key(),J->key());
Map<PairKey,void*>::Element *E=pair_map.find(key);
if (!pair_ok && E) {
if (unpair_callback)
unpair_callback(elem_A->owner,elem_A->subindex,elem_B->owner,elem_B->subindex,E->get(),unpair_userdata);
pair_map.erase(key);
}
if (pair_ok && !E) {
void *data=NULL;
if (pair_callback)
data=pair_callback(elem_A->owner,elem_A->subindex,elem_B->owner,elem_B->subindex,unpair_userdata);
pair_map.insert(key,data);
}
}
}
}
BroadPhase2DSW *BroadPhase2DBasic::_create() {
return memnew( BroadPhase2DBasic );
}
BroadPhase2DBasic::BroadPhase2DBasic() {
current=1;
unpair_callback=NULL;
unpair_userdata=NULL;
pair_callback=NULL;
pair_userdata=NULL;
}