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define flatten-collision-nodes

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This commit is contained in:
David Rose 2007-06-08 23:38:27 +00:00
parent 3971dfc49b
commit cb1c87d58c
3 changed files with 32 additions and 18 deletions
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38
panda/src/collide/collisionNode.cxx
View File

@ -145,27 +145,29 @@ xform(const LMatrix4f &mat) {
////////////////////////////////////////////////////////////////////
PandaNode *CollisionNode::
combine_with(PandaNode *other) {
if (is_exact_type(get_class_type()) &&
other->is_exact_type(get_class_type())) {
// Two CollisionNodes can combine, but only if they have the same
// name, because the name is often meaningful, and only if they
// have the same collide masks.
CollisionNode *cother = DCAST(CollisionNode, other);
if (get_name() == cother->get_name() &&
get_from_collide_mask() == cother->get_from_collide_mask() &&
get_into_collide_mask() == cother->get_into_collide_mask()) {
const COWPT(CollisionSolid) *solids_begin = &cother->_solids[0];
const COWPT(CollisionSolid) *solids_end = solids_begin + cother->_solids.size();
_solids.insert(_solids.end(), solids_begin, solids_end);
mark_internal_bounds_stale();
return this;
if (flatten_collision_nodes) {
if (is_exact_type(get_class_type()) &&
other->is_exact_type(get_class_type())) {
// Two CollisionNodes can combine, but only if they have the same
// name, because the name is often meaningful, and only if they
// have the same collide masks.
CollisionNode *cother = DCAST(CollisionNode, other);
if (get_name() == cother->get_name() &&
get_from_collide_mask() == cother->get_from_collide_mask() &&
get_into_collide_mask() == cother->get_into_collide_mask()) {
const COWPT(CollisionSolid) *solids_begin = &cother->_solids[0];
const COWPT(CollisionSolid) *solids_end = solids_begin + cother->_solids.size();
_solids.insert(_solids.end(), solids_begin, solids_end);
mark_internal_bounds_stale();
return this;
}
// Two CollisionNodes with different names or different collide
// masks can't combine.
}
// Two CollisionNodes with different names can't combine.
return (PandaNode *)NULL;
}
return PandaNode::combine_with(other);
return NULL;
}
////////////////////////////////////////////////////////////////////

11
panda/src/collide/config_collide.cxx
View File

@ -73,6 +73,17 @@ ConfigVariableBool allow_collider_multiple
"false, a one-word BitMask is always used instead, which is faster "
"per pass, but may require more passes."));
ConfigVariableBool flatten_collision_nodes
("flatten-collision-nodes", false,
PRC_DESC("Set this true to allow NodePath::flatten_medium() and "
"flatten_strong() to combine multiple CollisionNodes "
"into a single CollisionNode--but only if they share the "
"same name and collide masks. When false, CollisionNodes "
"are never combined. This is false by default, since "
"collision tests rely heavily on bounding volume tests "
"to be efficient, and combining CollisionNodes is likely "
"to merge bounding volumes inappropriately."));
////////////////////////////////////////////////////////////////////
// Function: init_libcollide

1
panda/src/collide/config_collide.h
View File

@ -28,6 +28,7 @@ NotifyCategoryDecl(collide, EXPCL_PANDA, EXPTP_PANDA);
extern EXPCL_PANDA ConfigVariableBool respect_prev_transform;
extern EXPCL_PANDA ConfigVariableBool respect_effective_normal;
extern EXPCL_PANDA ConfigVariableBool allow_collider_multiple;
extern EXPCL_PANDA ConfigVariableBool flatten_collision_nodes;
extern EXPCL_PANDA void init_libcollide();