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created make_sphere function to reuse code for make_collision_sphere and make_polylight_sphere

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This commit is contained in:
Asad M. Zaman 2004-06-09 21:04:43 +00:00
parent 5a19e97534
commit 3ff5b79b00
2 changed files with 70 additions and 48 deletions
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116
panda/src/egg2pg/eggLoader.cxx
View File

@ -1823,6 +1823,67 @@ find_first_polygon(EggGroup *egg_group) {
return NULL;
}
////////////////////////////////////////////////////////////////////
// Function: EggLoader::make_sphere
// Access: Private
// Description: Creates a single generic Sphere corresponding
// to the polygons associated with this group.
// This sphere is used by make_collision_sphere and
// Polylight sphere. It could be used for other spheres.
////////////////////////////////////////////////////////////////////
bool EggLoader::
make_sphere(EggGroup *egg_group, LPoint3f &center, float &radius) {
bool success=false;
EggGroup *geom_group = find_collision_geometry(egg_group);
if (geom_group != (EggGroup *)NULL) {
// Collect all of the vertices.
pset<EggVertex *> vertices;
EggGroup::const_iterator ci;
for (ci = geom_group->begin(); ci != geom_group->end(); ++ci) {
if ((*ci)->is_of_type(EggPrimitive::get_class_type())) {
EggPrimitive *prim = DCAST(EggPrimitive, *ci);
EggPrimitive::const_iterator pi;
for (pi = prim->begin(); pi != prim->end(); ++pi) {
vertices.insert(*pi);
}
}
}
// Now average together all of the vertices to get a center.
int num_vertices = 0;
LPoint3d d_center(0.0, 0.0, 0.0);
pset<EggVertex *>::const_iterator vi;
for (vi = vertices.begin(); vi != vertices.end(); ++vi) {
EggVertex *vtx = (*vi);
d_center += vtx->get_pos3();
num_vertices++;
}
if (num_vertices > 0) {
d_center /= (double)num_vertices;
LMatrix4d mat = egg_group->get_vertex_to_node();
d_center = d_center * mat;
// And the furthest vertex determines the radius.
double radius2 = 0.0;
for (vi = vertices.begin(); vi != vertices.end(); ++vi) {
EggVertex *vtx = (*vi);
LPoint3d p3 = vtx->get_pos3();
LVector3d v = p3 * mat - d_center;
radius2 = max(radius2, v.length_squared());
}
center = LCAST(float,d_center);
float radius = sqrtf(radius2);
success = true;
}
}
return success;
}
////////////////////////////////////////////////////////////////////
// Function: EggLoader::make_collision_solids
// Access: Private
@ -1952,54 +2013,13 @@ make_collision_polyset(EggGroup *egg_group, CollisionNode *cnode,
void EggLoader::
make_collision_sphere(EggGroup *egg_group, CollisionNode *cnode,
EggGroup::CollideFlags flags) {
EggGroup *geom_group = find_collision_geometry(egg_group);
if (geom_group != (EggGroup *)NULL) {
// Collect all of the vertices.
pset<EggVertex *> vertices;
EggGroup::const_iterator ci;
for (ci = geom_group->begin(); ci != geom_group->end(); ++ci) {
if ((*ci)->is_of_type(EggPrimitive::get_class_type())) {
EggPrimitive *prim = DCAST(EggPrimitive, *ci);
EggPrimitive::const_iterator pi;
for (pi = prim->begin(); pi != prim->end(); ++pi) {
vertices.insert(*pi);
}
}
}
// Now average together all of the vertices to get a center.
int num_vertices = 0;
LPoint3d center(0.0, 0.0, 0.0);
pset<EggVertex *>::const_iterator vi;
for (vi = vertices.begin(); vi != vertices.end(); ++vi) {
EggVertex *vtx = (*vi);
center += vtx->get_pos3();
num_vertices++;
}
if (num_vertices > 0) {
center /= (double)num_vertices;
LMatrix4d mat = egg_group->get_vertex_to_node();
center = center * mat;
// And the furthest vertex determines the radius.
double radius2 = 0.0;
for (vi = vertices.begin(); vi != vertices.end(); ++vi) {
EggVertex *vtx = (*vi);
LPoint3d p3 = vtx->get_pos3();
LVector3d v = p3 * mat - center;
radius2 = max(radius2, v.length_squared());
}
float radius = sqrtf(radius2);
CollisionSphere *cssphere =
new CollisionSphere(LCAST(float, center), radius);
apply_collision_flags(cssphere, flags);
cnode->add_solid(cssphere);
}
LPoint3f center;
float radius;
if (make_sphere(egg_group, center, radius)) {
CollisionSphere *cssphere =
new CollisionSphere(center, radius);
apply_collision_flags(cssphere, flags);
cnode->add_solid(cssphere);
}
}

2
panda/src/egg2pg/eggLoader.h
View File

@ -113,6 +113,8 @@ private:
void set_portal_polygon(EggGroup *egg_group, PortalNode *pnode);
EggPolygon *find_first_polygon(EggGroup *egg_group);
bool make_sphere(EggGroup *start_group, LPoint3f &center, float &radius);
void make_collision_solids(EggGroup *start_group, EggGroup *egg_group,
CollisionNode *cnode);
void make_collision_plane(EggGroup *egg_group, CollisionNode *cnode,