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respect switch nodes

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This commit is contained in:
David Rose 2002-09-05 14:52:58 +00:00
parent 97cabfce02
commit ca32144537
2 changed files with 51 additions and 22 deletions
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72
panda/src/distort/projectionScreen.cxx
View File

@ -22,6 +22,7 @@
#include "geomTristrip.h"
#include "transformState.h"
#include "workingNodePath.h"
#include "switchNode.h"
TypeHandle ProjectionScreen::_type_handle;
@ -135,10 +136,11 @@ void ProjectionScreen::
set_projector(const NodePath &projector) {
_projector_node = (LensNode *)NULL;
_projector = projector;
_stale = true;
nassertv(!projector.is_empty() &&
projector.node()->is_of_type(LensNode::get_class_type()));
_projector_node = DCAST(LensNode, projector.node());
if (!projector.is_empty()) {
nassertv(projector.node()->is_of_type(LensNode::get_class_type()));
_projector_node = DCAST(LensNode, projector.node());
_stale = true;
}
}
////////////////////////////////////////////////////////////////////
@ -398,25 +400,51 @@ recompute_node(const WorkingNodePath &np, LMatrix4f &rel_mat,
recompute_geom_node(np, rel_mat, computed_rel_mat);
}
// Now recurse on children.
int num_children = node->get_num_children();
for (int i = 0; i < num_children; i++) {
PandaNode *child = node->get_child(i);
const TransformState *transform = child->get_transform();
if (!transform->is_identity()) {
// This child node has a transform; therefore, we must recompute
// the relative matrix from this point.
LMatrix4f new_rel_mat;
bool computed_new_rel_mat = false;
recompute_node(WorkingNodePath(np, child), new_rel_mat,
computed_new_rel_mat);
} else {
// This child has no transform, so we can use the same transform
// space from before.
recompute_node(WorkingNodePath(np, child), rel_mat, computed_rel_mat);
if (node->is_exact_type(SwitchNode::get_class_type())) {
// We make a special case for switch nodes only. Other kinds of
// selective child nodes, like LOD's and sequence nodes, will get
// all of their children traversed; switch nodes will only
// traverse the currently active child.
int i = DCAST(SwitchNode, node)->get_visible_child();
if (i >= 0 && i < node->get_num_children()) {
PandaNode *child = node->get_child(i);
recompute_child(WorkingNodePath(np, child), rel_mat, computed_rel_mat);
}
} else {
// A non-switch node. Recurse on all children.
int num_children = node->get_num_children();
for (int i = 0; i < num_children; i++) {
PandaNode *child = node->get_child(i);
recompute_child(WorkingNodePath(np, child), rel_mat, computed_rel_mat);
}
}
}
////////////////////////////////////////////////////////////////////
// Function: ProjectionScreen::recompute_child
// Access: Private
// Description: Works in conjunction with recompute_node() to recurse
// over the whole graph. This is called on each child
// of a given node.
////////////////////////////////////////////////////////////////////
void ProjectionScreen::
recompute_child(const WorkingNodePath &np, LMatrix4f &rel_mat,
bool &computed_rel_mat) {
PandaNode *child = np.node();
const TransformState *transform = child->get_transform();
if (!transform->is_identity()) {
// This child node has a transform; therefore, we must recompute
// the relative matrix from this point.
LMatrix4f new_rel_mat;
bool computed_new_rel_mat = false;
recompute_node(np, new_rel_mat, computed_new_rel_mat);
} else {
// This child has no transform, so we can use the same transform
// space from before.
recompute_node(np, rel_mat, computed_rel_mat);
}
}

1
panda/src/distort/projectionScreen.h
View File

@ -89,6 +89,7 @@ private:
void recompute_if_stale();
void do_recompute(const NodePath &this_np);
void recompute_node(const WorkingNodePath &np, LMatrix4f &rel_mat, bool &computed_rel_mat);
void recompute_child(const WorkingNodePath &np, LMatrix4f &rel_mat, bool &computed_rel_mat);
void recompute_geom_node(const WorkingNodePath &np, LMatrix4f &rel_mat, bool &computed_rel_mat);
void recompute_geom(Geom *geom, const LMatrix4f &rel_mat);