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authorStijn Buys <ingar@osirion.org>2012-10-10 21:27:41 +0000
committerStijn Buys <ingar@osirion.org>2012-10-10 21:27:41 +0000
commit05c560e7b9f508997a7c7c5e466329692796dab4 (patch)
treee427006ef35f23cb1ef987442b496e4eb2622aca /src
parent8a6f3d478c825d226a21b73f5bcec2b92bf31ccb (diff)
Provided bullet physics collision callback methods.
Diffstat (limited to 'src')
-rw-r--r--src/core/entity.cc22
-rw-r--r--src/core/entity.h10
-rw-r--r--src/core/physics.cc40
3 files changed, 71 insertions, 1 deletions
diff --git a/src/core/entity.cc b/src/core/entity.cc
index 1b879f3..46bcd5d 100644
--- a/src/core/entity.cc
+++ b/src/core/entity.cc
@@ -646,6 +646,7 @@ void Entity::reset()
//entity_body->setActivationState(ISLAND_SLEEPING);
entity_body->setActivationState(WANTS_DEACTIVATION);
entity_body->setCollisionFlags(entity_body->getCollisionFlags() | btCollisionObject::CF_STATIC_OBJECT);
+ entity_body->setUserPointer((void *) this);
if (zone())
zone()->physics()->addRigidBody(entity_body);
@@ -779,6 +780,10 @@ void EntityDynamic::reset()
// create physics body
entity_body_info = new btRigidBody::btRigidBodyConstructionInfo(entity_mass, entity_motionstate, entity_collision_shape, inertia);
entity_body = new btRigidBody(*entity_body_info);
+ // point the bullet user pointer to the entity
+ entity_body->setUserPointer((void *) this);
+ // enable custom collision callback
+ entity_body->setCollisionFlags(entity_body->getCollisionFlags() | btCollisionObject::CF_CUSTOM_MATERIAL_CALLBACK);
if (entity_mass) {
entity_body->setActivationState(DISABLE_DEACTIVATION);
@@ -800,6 +805,9 @@ void EntityDynamic::reset()
motionstate()->setWorldTransform(t);
}
+ /* Does not work
+
+
if (entity_mass) {
if (entity_state == Docked) {
entity_body->setActivationState(DISABLE_SIMULATION);
@@ -809,6 +817,7 @@ void EntityDynamic::reset()
entity_body->setActivationState(DISABLE_DEACTIVATION);
}
}
+ */
set_dirty();
}
@@ -845,6 +854,10 @@ void EntityDynamic::frame(const unsigned long elapsed)
}
}
+void EntityDynamic::collision(Entity *other)
+{
+}
+
void EntityDynamic::serialize_server_create(std::ostream & os) const
{
Entity::serialize_server_create(os);
@@ -1253,6 +1266,11 @@ void EntityControlable::reset()
entity_body_info = new btRigidBody::btRigidBodyConstructionInfo(entity_mass, entity_motionstate, entity_collision_shape, inertia);
entity_body = new btRigidBody(*entity_body_info);
entity_body->setActivationState(DISABLE_DEACTIVATION);
+ // point the bullet user pointer to the entity
+ entity_body->setUserPointer((void *) this);
+ // enable custom collision callback
+ entity_body->setCollisionFlags(entity_body->getCollisionFlags() | btCollisionObject::CF_CUSTOM_MATERIAL_CALLBACK);
+
//entity_body->setCollisionFlags(entity_body->getCollisionFlags() | btCollisionObject::CF_KINEMATIC_OBJECT);
entity_actioninterface = new ActionInterface(this);
@@ -1269,6 +1287,8 @@ void EntityControlable::reset()
body()->setWorldTransform(t);
motionstate()->setWorldTransform(t);
+ /* Does not work
+
if (entity_state == Docked) {
entity_body->setActivationState(DISABLE_SIMULATION);
entity_body->setCollisionFlags(entity_body->getCollisionFlags() | btCollisionObject::CF_NO_CONTACT_RESPONSE);
@@ -1276,7 +1296,7 @@ void EntityControlable::reset()
entity_body->setActivationState(DISABLE_DEACTIVATION);
entity_body->setCollisionFlags(entity_body->getCollisionFlags() & ~btCollisionObject::CF_NO_CONTACT_RESPONSE);
}
-
+ */
set_dirty();
}
diff --git a/src/core/entity.h b/src/core/entity.h
index 19e47bc..092f4a7 100644
--- a/src/core/entity.h
+++ b/src/core/entity.h
@@ -630,6 +630,16 @@ public:
* @brief reset the physics state
*/
virtual void reset();
+
+ /**
+ * @brief physics collision callback
+ * This funcion is called by the physics engine if the entity collides with another entity.
+ * It can be implemented by game child classes to provide collision effects and feedback.
+ * If the collision happens between two EntityDynamic instances (or subclasses thereof)
+ * the method will be called on each collision partner.
+ * Warning: this can be called multiple times for a single collision
+ * */
+ virtual void collision(Entity *other);
protected:
float entity_mass;
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()