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panda3d/panda/src/pgraph/clipPlaneAttrib.cxx

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// Filename: clipPlaneAttrib.cxx
// Created by: drose (11Jul02)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) 2001 - 2004, Disney Enterprises, Inc. All rights reserved
//
// All use of this software is subject to the terms of the Panda 3d
// Software license. You should have received a copy of this license
// along with this source code; you will also find a current copy of
// the license at http://etc.cmu.edu/panda3d/docs/license/ .
//
// To contact the maintainers of this program write to
// panda3d-general@lists.sourceforge.net .
//
////////////////////////////////////////////////////////////////////
#include "clipPlaneAttrib.h"
#include "pandaNode.h"
#include "graphicsStateGuardianBase.h"
#include "bamReader.h"
#include "bamWriter.h"
#include "datagram.h"
#include "datagramIterator.h"
CPT(RenderAttrib) ClipPlaneAttrib::_empty_attrib;
CPT(RenderAttrib) ClipPlaneAttrib::_all_off_attrib;
TypeHandle ClipPlaneAttrib::_type_handle;
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::make
// Access: Published, Static
// Description: Constructs a new ClipPlaneAttrib object that enables (or
// disables, according to op) the indicated plane(s).
//
// This method is now deprecated. Use add_on_plane() or
// add_off_plane() instead.
////////////////////////////////////////////////////////////////////
CPT(RenderAttrib) ClipPlaneAttrib::
make(ClipPlaneAttrib::Operation op, PlaneNode *plane) {
CPT(RenderAttrib) attrib;
switch (op) {
case O_set:
attrib = make_all_off();
attrib = DCAST(ClipPlaneAttrib, attrib)->add_on_plane(NodePath(plane));
return attrib;
case O_add:
attrib = make();
attrib = DCAST(ClipPlaneAttrib, attrib)->add_on_plane(NodePath(plane));
return attrib;
case O_remove:
attrib = make();
attrib = DCAST(ClipPlaneAttrib, attrib)->add_off_plane(NodePath(plane));
return attrib;
}
nassertr(false, make());
return make();
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::make
// Access: Published, Static
// Description: Constructs a new ClipPlaneAttrib object that turns on (or
// off, according to op) the indicate plane(s).
//
// This method is now deprecated. Use add_on_plane() or
// add_off_plane() instead.
////////////////////////////////////////////////////////////////////
CPT(RenderAttrib) ClipPlaneAttrib::
make(ClipPlaneAttrib::Operation op, PlaneNode *plane1, PlaneNode *plane2) {
CPT(RenderAttrib) attrib;
switch (op) {
case O_set:
attrib = make_all_off();
attrib = DCAST(ClipPlaneAttrib, attrib)->add_on_plane(NodePath(plane1));
attrib = DCAST(ClipPlaneAttrib, attrib)->add_on_plane(NodePath(plane2));
return attrib;
case O_add:
attrib = make();
attrib = DCAST(ClipPlaneAttrib, attrib)->add_on_plane(NodePath(plane1));
attrib = DCAST(ClipPlaneAttrib, attrib)->add_on_plane(NodePath(plane2));
return attrib;
case O_remove:
attrib = make();
attrib = DCAST(ClipPlaneAttrib, attrib)->add_off_plane(NodePath(plane1));
attrib = DCAST(ClipPlaneAttrib, attrib)->add_off_plane(NodePath(plane2));
return attrib;
}
nassertr(false, make());
return make();
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::make
// Access: Published, Static
// Description: Constructs a new ClipPlaneAttrib object that turns on (or
// off, according to op) the indicate plane(s).
//
// This method is now deprecated. Use add_on_plane() or
// add_off_plane() instead.
////////////////////////////////////////////////////////////////////
CPT(RenderAttrib) ClipPlaneAttrib::
make(ClipPlaneAttrib::Operation op, PlaneNode *plane1, PlaneNode *plane2,
PlaneNode *plane3) {
CPT(RenderAttrib) attrib;
switch (op) {
case O_set:
attrib = make_all_off();
attrib = DCAST(ClipPlaneAttrib, attrib)->add_on_plane(NodePath(plane1));
attrib = DCAST(ClipPlaneAttrib, attrib)->add_on_plane(NodePath(plane2));
attrib = DCAST(ClipPlaneAttrib, attrib)->add_on_plane(NodePath(plane3));
return attrib;
case O_add:
attrib = make();
attrib = DCAST(ClipPlaneAttrib, attrib)->add_on_plane(NodePath(plane1));
attrib = DCAST(ClipPlaneAttrib, attrib)->add_on_plane(NodePath(plane2));
attrib = DCAST(ClipPlaneAttrib, attrib)->add_on_plane(NodePath(plane3));
return attrib;
case O_remove:
attrib = make();
attrib = DCAST(ClipPlaneAttrib, attrib)->add_off_plane(NodePath(plane1));
attrib = DCAST(ClipPlaneAttrib, attrib)->add_off_plane(NodePath(plane2));
attrib = DCAST(ClipPlaneAttrib, attrib)->add_off_plane(NodePath(plane3));
return attrib;
}
nassertr(false, make());
return make();
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::make
// Access: Published, Static
// Description: Constructs a new ClipPlaneAttrib object that turns on (or
// off, according to op) the indicate plane(s).
//
// This method is now deprecated. Use add_on_plane() or
// add_off_plane() instead.
////////////////////////////////////////////////////////////////////
CPT(RenderAttrib) ClipPlaneAttrib::
make(ClipPlaneAttrib::Operation op, PlaneNode *plane1, PlaneNode *plane2,
PlaneNode *plane3, PlaneNode *plane4) {
CPT(RenderAttrib) attrib;
switch (op) {
case O_set:
attrib = make_all_off();
attrib = DCAST(ClipPlaneAttrib, attrib)->add_on_plane(NodePath(plane1));
attrib = DCAST(ClipPlaneAttrib, attrib)->add_on_plane(NodePath(plane2));
attrib = DCAST(ClipPlaneAttrib, attrib)->add_on_plane(NodePath(plane3));
attrib = DCAST(ClipPlaneAttrib, attrib)->add_on_plane(NodePath(plane4));
return attrib;
case O_add:
attrib = make();
attrib = DCAST(ClipPlaneAttrib, attrib)->add_on_plane(NodePath(plane1));
attrib = DCAST(ClipPlaneAttrib, attrib)->add_on_plane(NodePath(plane2));
attrib = DCAST(ClipPlaneAttrib, attrib)->add_on_plane(NodePath(plane3));
attrib = DCAST(ClipPlaneAttrib, attrib)->add_on_plane(NodePath(plane4));
return attrib;
case O_remove:
attrib = make();
attrib = DCAST(ClipPlaneAttrib, attrib)->add_off_plane(NodePath(plane1));
attrib = DCAST(ClipPlaneAttrib, attrib)->add_off_plane(NodePath(plane2));
attrib = DCAST(ClipPlaneAttrib, attrib)->add_off_plane(NodePath(plane3));
attrib = DCAST(ClipPlaneAttrib, attrib)->add_off_plane(NodePath(plane4));
return attrib;
}
nassertr(false, make());
return make();
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::get_operation
// Access: Published
// Description: Returns the basic operation type of the ClipPlaneAttrib.
// If this is O_set, the planes listed here completely
// replace any planes that were already on. If this is
// O_add, the planes here are added to the set of of
// planes that were already on, and if O_remove, the
// planes here are removed from the set of planes that
// were on.
//
// This method is now deprecated. ClipPlaneAttribs
// nowadays have a separate list of on_planes and
// off_planes, so this method doesn't make sense. Query
// the lists independently.
////////////////////////////////////////////////////////////////////
ClipPlaneAttrib::Operation ClipPlaneAttrib::
get_operation() const {
if (has_all_off()) {
return O_set;
} else if (get_num_off_planes() == 0) {
return O_add;
} else {
return O_remove;
}
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::get_num_planes
// Access: Published
// Description: Returns the number of planes listed in the attribute.
//
// This method is now deprecated. ClipPlaneAttribs
// nowadays have a separate list of on_planes and
// off_planes, so this method doesn't make sense. Query
// the lists independently.
////////////////////////////////////////////////////////////////////
int ClipPlaneAttrib::
get_num_planes() const {
if (get_num_off_planes() == 0) {
return get_num_on_planes();
} else {
return get_num_off_planes();
}
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::get_plane
// Access: Published
// Description: Returns the nth plane listed in the attribute.
//
// This method is now deprecated. ClipPlaneAttribs
// nowadays have a separate list of on_planes and
// off_planes, so this method doesn't make sense. Query
// the lists independently.
////////////////////////////////////////////////////////////////////
PlaneNode *ClipPlaneAttrib::
get_plane(int n) const {
if (get_num_off_planes() == 0) {
return DCAST(PlaneNode, get_on_plane(n).node());
} else {
return DCAST(PlaneNode, get_off_plane(n).node());
}
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::has_plane
// Access: Published
// Description: Returns true if the indicated plane is listed in the
// attrib, false otherwise.
//
// This method is now deprecated. ClipPlaneAttribs
// nowadays have a separate list of on_planes and
// off_planes, so this method doesn't make sense. Query
// the lists independently.
////////////////////////////////////////////////////////////////////
bool ClipPlaneAttrib::
has_plane(PlaneNode *plane) const {
if (get_num_off_planes() == 0) {
return has_on_plane(NodePath(plane));
} else {
return has_off_plane(NodePath(plane));
}
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::add_plane
// Access: Published
// Description: Returns a new ClipPlaneAttrib, just like this one, but
// with the indicated plane added to the list of planes.
//
// This method is now deprecated. Use add_on_plane() or
// add_off_plane() instead.
////////////////////////////////////////////////////////////////////
CPT(RenderAttrib) ClipPlaneAttrib::
add_plane(PlaneNode *plane) const {
if (get_num_off_planes() == 0) {
return add_on_plane(NodePath(plane));
} else {
return add_off_plane(NodePath(plane));
}
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::remove_plane
// Access: Published
// Description: Returns a new ClipPlaneAttrib, just like this one, but
// with the indicated plane removed from the list of
// planes.
//
// This method is now deprecated. Use remove_on_plane()
// or remove_off_plane() instead.
////////////////////////////////////////////////////////////////////
CPT(RenderAttrib) ClipPlaneAttrib::
remove_plane(PlaneNode *plane) const {
if (get_num_off_planes() == 0) {
return remove_on_plane(NodePath(plane));
} else {
return remove_off_plane(NodePath(plane));
}
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::make
// Access: Published, Static
// Description: Constructs a new ClipPlaneAttrib object that does
// nothing.
////////////////////////////////////////////////////////////////////
CPT(RenderAttrib) ClipPlaneAttrib::
make() {
// We make it a special case and store a pointer to the empty attrib
// forever once we find it the first time, as an optimization.
if (_empty_attrib == (RenderAttrib *)NULL) {
_empty_attrib = return_new(new ClipPlaneAttrib);
}
return _empty_attrib;
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::make_all_off
// Access: Published, Static
// Description: Constructs a new ClipPlaneAttrib object that disables
// all planes (and hence disables clipping).
////////////////////////////////////////////////////////////////////
CPT(RenderAttrib) ClipPlaneAttrib::
make_all_off() {
// We make it a special case and store a pointer to the off attrib
// forever once we find it the first time, as an optimization.
if (_all_off_attrib == (RenderAttrib *)NULL) {
ClipPlaneAttrib *attrib = new ClipPlaneAttrib;
attrib->_off_all_planes = true;
_all_off_attrib = return_new(attrib);
}
return _all_off_attrib;
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::add_on_plane
// Access: Published
// Description: Returns a new ClipPlaneAttrib, just like this one, but
// with the indicated plane added to the list of planes
// enabled by this attrib.
////////////////////////////////////////////////////////////////////
CPT(RenderAttrib) ClipPlaneAttrib::
add_on_plane(const NodePath &plane) const {
nassertr(!plane.is_empty() && plane.node()->is_of_type(PlaneNode::get_class_type()), this);
ClipPlaneAttrib *attrib = new ClipPlaneAttrib(*this);
attrib->_on_planes.insert(plane);
attrib->_off_planes.erase(plane);
pair<Planes::iterator, bool> insert_result =
attrib->_on_planes.insert(Planes::value_type(plane));
if (insert_result.second) {
// Also ensure it is removed from the off_planes list.
attrib->_off_planes.erase(plane);
}
return return_new(attrib);
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::remove_on_plane
// Access: Published
// Description: Returns a new ClipPlaneAttrib, just like this one, but
// with the indicated plane removed from the list of
// planes enabled by this attrib.
////////////////////////////////////////////////////////////////////
CPT(RenderAttrib) ClipPlaneAttrib::
remove_on_plane(const NodePath &plane) const {
nassertr(!plane.is_empty() && plane.node()->is_of_type(PlaneNode::get_class_type()), this);
ClipPlaneAttrib *attrib = new ClipPlaneAttrib(*this);
attrib->_on_planes.erase(plane);
return return_new(attrib);
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::add_off_plane
// Access: Published
// Description: Returns a new ClipPlaneAttrib, just like this one, but
// with the indicated plane added to the list of planes
// disabled by this attrib.
////////////////////////////////////////////////////////////////////
CPT(RenderAttrib) ClipPlaneAttrib::
add_off_plane(const NodePath &plane) const {
nassertr(!plane.is_empty() && plane.node()->is_of_type(PlaneNode::get_class_type()), this);
ClipPlaneAttrib *attrib = new ClipPlaneAttrib(*this);
if (!_off_all_planes) {
attrib->_off_planes.insert(plane);
}
attrib->_on_planes.erase(plane);
return return_new(attrib);
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::remove_off_plane
// Access: Published
// Description: Returns a new ClipPlaneAttrib, just like this one, but
// with the indicated plane removed from the list of
// planes disabled by this attrib.
////////////////////////////////////////////////////////////////////
CPT(RenderAttrib) ClipPlaneAttrib::
remove_off_plane(const NodePath &plane) const {
nassertr(!plane.is_empty() && plane.node()->is_of_type(PlaneNode::get_class_type()), this);
ClipPlaneAttrib *attrib = new ClipPlaneAttrib(*this);
attrib->_off_planes.erase(plane);
return return_new(attrib);
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::issue
// Access: Public, Virtual
// Description: Calls the appropriate method on the indicated GSG
// to issue the graphics commands appropriate to the
// given attribute. This is normally called
// (indirectly) only from
// GraphicsStateGuardian::set_state() or modify_state().
////////////////////////////////////////////////////////////////////
void ClipPlaneAttrib::
issue(GraphicsStateGuardianBase *gsg) const {
gsg->issue_clip_plane(this);
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::output
// Access: Public, Virtual
// Description:
////////////////////////////////////////////////////////////////////
void ClipPlaneAttrib::
output(ostream &out) const {
out << get_type() << ":";
if (_off_planes.empty()) {
if (_on_planes.empty()) {
if (_off_all_planes) {
out << "all off";
} else {
out << "identity";
}
} else {
if (_off_all_planes) {
out << "set";
} else {
out << "on";
}
}
} else {
out << "off";
Planes::const_iterator fi;
for (fi = _off_planes.begin(); fi != _off_planes.end(); ++fi) {
NodePath plane = (*fi);
out << " " << plane;
}
if (!_on_planes.empty()) {
out << " on";
}
}
Planes::const_iterator li;
for (li = _on_planes.begin(); li != _on_planes.end(); ++li) {
NodePath plane = (*li);
out << " " << plane;
}
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::compare_to_impl
// Access: Protected, Virtual
// Description: Intended to be overridden by derived ClipPlaneAttrib
// types to return a unique number indicating whether
// this ClipPlaneAttrib is equivalent to the other one.
//
// This should return 0 if the two ClipPlaneAttrib
// objects are equivalent, a number less than zero if
// this one should be sorted before the other one, and a
// number greater than zero otherwise.
//
// This will only be called with two ClipPlaneAttrib
// objects whose get_type() functions return the same.
////////////////////////////////////////////////////////////////////
int ClipPlaneAttrib::
compare_to_impl(const RenderAttrib *other) const {
const ClipPlaneAttrib *ta;
DCAST_INTO_R(ta, other, 0);
if (_off_all_planes != ta->_off_all_planes) {
return (int)_off_all_planes - (int)ta->_off_all_planes;
}
Planes::const_iterator li = _on_planes.begin();
Planes::const_iterator oli = ta->_on_planes.begin();
while (li != _on_planes.end() && oli != ta->_on_planes.end()) {
NodePath plane = (*li);
NodePath other_plane = (*oli);
int compare = plane.compare_to(other_plane);
if (compare != 0) {
return compare;
}
++li;
++oli;
}
if (li != _on_planes.end()) {
return 1;
}
if (oli != ta->_on_planes.end()) {
return -1;
}
Planes::const_iterator fi = _off_planes.begin();
Planes::const_iterator ofi = ta->_off_planes.begin();
while (fi != _off_planes.end() && ofi != ta->_off_planes.end()) {
NodePath plane = (*fi);
NodePath other_plane = (*ofi);
int compare = plane.compare_to(other_plane);
if (compare != 0) {
return compare;
}
++fi;
++ofi;
}
if (fi != _off_planes.end()) {
return 1;
}
if (ofi != ta->_off_planes.end()) {
return -1;
}
return 0;
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::compose_impl
// Access: Protected, Virtual
// Description: Intended to be overridden by derived RenderAttrib
// types to specify how two consecutive RenderAttrib
// objects of the same type interact.
//
// This should return the result of applying the other
// RenderAttrib to a node in the scene graph below this
// RenderAttrib, which was already applied. In most
// cases, the result is the same as the other
// RenderAttrib (that is, a subsequent RenderAttrib
// completely replaces the preceding one). On the other
// hand, some kinds of RenderAttrib (for instance,
// ColorTransformAttrib) might combine in meaningful
// ways.
////////////////////////////////////////////////////////////////////
CPT(RenderAttrib) ClipPlaneAttrib::
compose_impl(const RenderAttrib *other) const {
const ClipPlaneAttrib *ta;
DCAST_INTO_R(ta, other, 0);
if (ta->_off_all_planes) {
// If the other type turns off all planes, it doesn't matter what
// we are.
return ta;
}
// This is a three-way merge between ai, bi, and ci, except that bi
// and ci should have no intersection and therefore needn't be
// compared to each other.
Planes::const_iterator ai = _on_planes.begin();
Planes::const_iterator bi = ta->_on_planes.begin();
Planes::const_iterator ci = ta->_off_planes.begin();
// Create a new ClipPlaneAttrib that will hold the result.
ClipPlaneAttrib *new_attrib = new ClipPlaneAttrib;
back_insert_iterator<Planes> result =
back_inserter(new_attrib->_on_planes);
while (ai != _on_planes.end() &&
bi != ta->_on_planes.end() &&
ci != ta->_off_planes.end()) {
if ((*ai) < (*bi)) {
if ((*ai) < (*ci)) {
// Here is a plane that we have in the original, which is not
// present in the secondary.
*result = *ai;
++ai;
++result;
} else if ((*ci) < (*ai)) {
// Here is a plane that is disabled in the secondary, but
// was not present in the original.
++ci;
} else { // (*ci) == (*ai)
// Here is a plane that is disabled in the secondary, and
// was present in the original.
++ai;
++ci;
}
} else if ((*bi) < (*ai)) {
// Here is a new plane we have in the secondary, that was not
// present in the original.
*result = *bi;
++bi;
++result;
} else { // (*bi) == (*ai)
// Here is a plane we have in both.
*result = *bi;
++ai;
++bi;
++result;
}
}
while (ai != _on_planes.end() && bi != ta->_on_planes.end()) {
if ((*ai) < (*bi)) {
// Here is a plane that we have in the original, which is not
// present in the secondary.
*result = *ai;
++ai;
++result;
} else if ((*bi) < (*ai)) {
// Here is a new plane we have in the secondary, that was not
// present in the original.
*result = *bi;
++bi;
++result;
} else {
// Here is a plane we have in both.
*result = *bi;
++ai;
++bi;
++result;
}
}
while (ai != _on_planes.end() && ci != ta->_off_planes.end()) {
if ((*ai) < (*ci)) {
// Here is a plane that we have in the original, which is not
// present in the secondary.
*result = *ai;
++ai;
++result;
} else if ((*ci) < (*ai)) {
// Here is a plane that is disabled in the secondary, but
// was not present in the original.
++ci;
} else { // (*ci) == (*ai)
// Here is a plane that is disabled in the secondary, and
// was present in the original.
++ai;
++ci;
}
}
while (ai != _on_planes.end()) {
*result = *ai;
++ai;
++result;
}
while (bi != ta->_on_planes.end()) {
*result = *bi;
++bi;
++result;
}
return return_new(new_attrib);
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::invert_compose_impl
// Access: Protected, Virtual
// Description: Intended to be overridden by derived RenderAttrib
// types to specify how two consecutive RenderAttrib
// objects of the same type interact.
//
// See invert_compose() and compose_impl().
////////////////////////////////////////////////////////////////////
CPT(RenderAttrib) ClipPlaneAttrib::
invert_compose_impl(const RenderAttrib *other) const {
// I think in this case the other attrib always wins. Maybe this
// needs a bit more thought. It's hard to imagine that it's even
// important to compute this properly.
return other;
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::make_default_impl
// Access: Protected, Virtual
// Description: Intended to be overridden by derived ClipPlaneAttrib
// types to specify what the default property for a
// ClipPlaneAttrib of this type should be.
//
// This should return a newly-allocated ClipPlaneAttrib of
// the same type that corresponds to whatever the
// standard default for this kind of ClipPlaneAttrib is.
////////////////////////////////////////////////////////////////////
RenderAttrib *ClipPlaneAttrib::
make_default_impl() const {
return new ClipPlaneAttrib;
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::register_with_read_factory
// Access: Public, Static
// Description: Tells the BamReader how to create objects of type
// ClipPlaneAttrib.
////////////////////////////////////////////////////////////////////
void ClipPlaneAttrib::
register_with_read_factory() {
BamReader::get_factory()->register_factory(get_class_type(), make_from_bam);
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::write_datagram
// Access: Public, Virtual
// Description: Writes the contents of this object to the datagram
// for shipping out to a Bam file.
////////////////////////////////////////////////////////////////////
void ClipPlaneAttrib::
write_datagram(BamWriter *manager, Datagram &dg) {
RenderAttrib::write_datagram(manager, dg);
dg.add_bool(_off_all_planes);
// write the number of off_planes
dg.add_uint16(get_num_off_planes());
// write the off planes pointers if any
Planes::const_iterator fi;
for (fi = _off_planes.begin(); fi != _off_planes.end(); ++fi) {
NodePath plane = (*fi);
// Whoops, we don't have a way to write out a NodePath right now.
manager->write_pointer(dg, plane.node());
}
// write the number of on planes
dg.add_uint16(get_num_on_planes());
// write the on planes pointers if any
Planes::const_iterator nti;
for (nti = _on_planes.begin(); nti != _on_planes.end(); ++nti) {
NodePath plane = (*nti);
manager->write_pointer(dg, plane.node());
}
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::complete_pointers
// Access: Public, Virtual
// Description: Receives an array of pointers, one for each time
// manager->read_pointer() was called in fillin().
// Returns the number of pointers processed.
////////////////////////////////////////////////////////////////////
int ClipPlaneAttrib::
complete_pointers(TypedWritable **p_list, BamReader *manager) {
int pi = RenderAttrib::complete_pointers(p_list, manager);
Planes::iterator ci = _off_planes.begin();
while (ci != _off_planes.end()) {
PandaNode *node;
DCAST_INTO_R(node, p_list[pi++], pi);
NodePath np(node);
(*ci) = np;
++ci;
}
ci = _on_planes.begin();
while (ci != _on_planes.end()) {
PandaNode *node;
DCAST_INTO_R(node, p_list[pi++], pi);
NodePath np(node);
(*ci) = np;
++ci;
}
return pi;
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::make_from_bam
// Access: Protected, Static
// Description: This function is called by the BamReader's factory
// when a new object of type ClipPlaneAttrib is encountered
// in the Bam file. It should create the ClipPlaneAttrib
// and extract its information from the file.
////////////////////////////////////////////////////////////////////
TypedWritable *ClipPlaneAttrib::
make_from_bam(const FactoryParams &params) {
ClipPlaneAttrib *attrib = new ClipPlaneAttrib;
DatagramIterator scan;
BamReader *manager;
parse_params(params, scan, manager);
attrib->fillin(scan, manager);
return attrib;
}
////////////////////////////////////////////////////////////////////
// Function: ClipPlaneAttrib::fillin
// Access: Protected
// Description: This internal function is called by make_from_bam to
// read in all of the relevant data from the BamFile for
// the new ClipPlaneAttrib.
////////////////////////////////////////////////////////////////////
void ClipPlaneAttrib::
fillin(DatagramIterator &scan, BamReader *manager) {
RenderAttrib::fillin(scan, manager);
// We cheat a little bit here. In the middle of bam version 4.10,
// we completely redefined the bam storage definition for
// ClipPlaneAttribs, without bothering to up the bam version or even to
// attempt to read the old definition. We get away with this,
// knowing that the egg loader doesn't create ClipPlaneAttribs, and
// hence no old bam files have the old definition for ClipPlaneAttrib
// within them.
_off_all_planes = scan.get_bool();
int num_off_planes = scan.get_uint16();
// Push back a NULL pointer for each off Plane for now, until
// we get the actual list of pointers later in complete_pointers().
_off_planes.reserve(num_off_planes);
int i;
for (i = 0; i < num_off_planes; i++) {
manager->read_pointer(scan);
_off_planes.push_back(NULL);
}
int num_on_planes = scan.get_uint16();
_on_planes.reserve(num_on_planes);
for (i = 0; i < num_on_planes; i++) {
manager->read_pointer(scan);
_on_planes.push_back(NULL);
}
}
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