130 lines
3.5 KiB
C++
130 lines
3.5 KiB
C++
/**
|
|
* PANDA 3D SOFTWARE
|
|
* Copyright (c) Carnegie Mellon University. All rights reserved.
|
|
*
|
|
* All use of this software is subject to the terms of the revised BSD
|
|
* license. You should have received a copy of this license along
|
|
* with this source code in a file named "LICENSE."
|
|
*
|
|
* @file depthTestAttrib.cxx
|
|
* @author drose
|
|
* @date 2002-03-04
|
|
*/
|
|
|
|
#include "depthTestAttrib.h"
|
|
#include "graphicsStateGuardianBase.h"
|
|
#include "dcast.h"
|
|
#include "bamReader.h"
|
|
#include "bamWriter.h"
|
|
#include "datagram.h"
|
|
#include "datagramIterator.h"
|
|
|
|
TypeHandle DepthTestAttrib::_type_handle;
|
|
int DepthTestAttrib::_attrib_slot;
|
|
|
|
/**
|
|
* Constructs a new DepthTestAttrib object.
|
|
*/
|
|
CPT(RenderAttrib) DepthTestAttrib::
|
|
make(DepthTestAttrib::PandaCompareFunc mode) {
|
|
DepthTestAttrib *attrib = new DepthTestAttrib(mode);
|
|
return return_new(attrib);
|
|
}
|
|
|
|
/**
|
|
* Returns a RenderAttrib that corresponds to whatever the standard default
|
|
* properties for render attributes of this type ought to be.
|
|
*/
|
|
CPT(RenderAttrib) DepthTestAttrib::
|
|
make_default() {
|
|
return return_new(new DepthTestAttrib);
|
|
}
|
|
|
|
/**
|
|
*
|
|
*/
|
|
void DepthTestAttrib::
|
|
output(std::ostream &out) const {
|
|
out << get_type() << ":";
|
|
output_comparefunc(out,_mode);
|
|
}
|
|
|
|
/**
|
|
* Intended to be overridden by derived DepthTestAttrib types to return a
|
|
* unique number indicating whether this DepthTestAttrib is equivalent to the
|
|
* other one.
|
|
*
|
|
* This should return 0 if the two DepthTestAttrib 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 DepthTestAttrib objects whose get_type()
|
|
* functions return the same.
|
|
*/
|
|
int DepthTestAttrib::
|
|
compare_to_impl(const RenderAttrib *other) const {
|
|
const DepthTestAttrib *ta = (const DepthTestAttrib *)other;
|
|
|
|
return (int)_mode - (int)ta->_mode;
|
|
}
|
|
|
|
/**
|
|
* Intended to be overridden by derived RenderAttrib types to return a unique
|
|
* hash for these particular properties. RenderAttribs that compare the same
|
|
* with compare_to_impl(), above, should return the same hash; RenderAttribs
|
|
* that compare differently should return a different hash.
|
|
*/
|
|
size_t DepthTestAttrib::
|
|
get_hash_impl() const {
|
|
size_t hash = 0;
|
|
hash = int_hash::add_hash(hash, (int)_mode);
|
|
return hash;
|
|
}
|
|
|
|
/**
|
|
* Tells the BamReader how to create objects of type DepthTestAttrib.
|
|
*/
|
|
void DepthTestAttrib::
|
|
register_with_read_factory() {
|
|
BamReader::get_factory()->register_factory(get_class_type(), make_from_bam);
|
|
}
|
|
|
|
/**
|
|
* Writes the contents of this object to the datagram for shipping out to a
|
|
* Bam file.
|
|
*/
|
|
void DepthTestAttrib::
|
|
write_datagram(BamWriter *manager, Datagram &dg) {
|
|
RenderAttrib::write_datagram(manager, dg);
|
|
|
|
dg.add_int8(_mode);
|
|
}
|
|
|
|
/**
|
|
* This function is called by the BamReader's factory when a new object of
|
|
* type DepthTestAttrib is encountered in the Bam file. It should create the
|
|
* DepthTestAttrib and extract its information from the file.
|
|
*/
|
|
TypedWritable *DepthTestAttrib::
|
|
make_from_bam(const FactoryParams ¶ms) {
|
|
DepthTestAttrib *attrib = new DepthTestAttrib;
|
|
DatagramIterator scan;
|
|
BamReader *manager;
|
|
|
|
parse_params(params, scan, manager);
|
|
attrib->fillin(scan, manager);
|
|
|
|
return attrib;
|
|
}
|
|
|
|
/**
|
|
* This internal function is called by make_from_bam to read in all of the
|
|
* relevant data from the BamFile for the new DepthTestAttrib.
|
|
*/
|
|
void DepthTestAttrib::
|
|
fillin(DatagramIterator &scan, BamReader *manager) {
|
|
RenderAttrib::fillin(scan, manager);
|
|
|
|
_mode = (PandaCompareFunc)scan.get_int8();
|
|
}
|