Provided bullet physics collision callback methods.

1 files changed, 40 insertions, 0 deletions

diff --git a/src/core/physics.cc b/src/core/physics.cc
index 9ffe13c..2c7dd96 100644
--- a/src/core/physics.cc
+++ b/src/core/physics.cc
@@ -8,10 +8,47 @@
 #include "core/physics.h"
 #include "core/zone.h"
 
+#include "btBulletDynamicsCommon.h"
 #include "BulletCollision/Gimpact/btGImpactCollisionAlgorithm.h"
 
 namespace core {
 
+/* ---- Bullet collision callbacks --------------------------------- */
+
+//extern ContactAddedCallback              gContactAddedCallback;
+
+/*
+ * 	see http://bulletphysics.org/mediawiki-1.5.8/index.php/Collision_Callbacks_and_Triggers
+ */
+
+bool bullet_contact_added_callback(btManifoldPoint &cp, const btCollisionObject *body0, int partId0, int index0, const btCollisionObject *body1, int partId1, int index1)
+{
+	Entity *entity0 = static_cast<Entity *>(body0->getUserPointer());
+	Entity *entity1 = static_cast<Entity *>(body1->getUserPointer());
+	
+	assert(entity0 && entity1);
+	
+	// FIXME there should probably be an entity flag indiciating wether or not it has a collision callback
+	
+	if ((entity0->type() == Entity::Dynamic) || (entity0->type() == Entity::Controlable)) {
+		static_cast<EntityDynamic *>(entity0)->collision(entity1);
+	}
+	
+	if ((entity1->type() == Entity::Dynamic) || (entity1->type() == Entity::Controlable)) {
+		static_cast<EntityDynamic *>(entity1)->collision(entity0);
+	}
+	//con_debug << "collision " << entity0->label() << " - " << entity1->label() << std::endl;
+	
+	// the return value should be ignored by bullet.
+	return true;
+}
+
+//bool bullet_contact_processed_callback(btManifoldPoint& cp,void* body0, void* body1);
+
+//bool bullet_contact_destroyed_callback(void* userPersistentData);
+
+/* ---- Bullet physics engine and algorithms ----------------------- */
+
 btDefaultCollisionConfiguration *Physics::physics_configuration = 0;
 btCollisionDispatcher *Physics::physics_dispatcher = 0;
 btSequentialImpulseConstraintSolver *Physics::physics_solver = 0;
@@ -26,6 +63,9 @@ void Physics::init()
 	physics_dispatcher = new btCollisionDispatcher(physics_configuration);
 	btGImpactCollisionAlgorithm::registerAlgorithm(physics_dispatcher);
 	physics_solver = new btSequentialImpulseConstraintSolver;
+	
+	// set custom bullet callbacks
+	gContactAddedCallback = bullet_contact_added_callback;
 }
 
 void Physics::done()