202 lines
7.5 KiB
C++
202 lines
7.5 KiB
C++
// Filename: materialAttrib.cxx
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// Created by: drose (04Mar02)
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//
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////////////////////////////////////////////////////////////////////
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//
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// PANDA 3D SOFTWARE
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// Copyright (c) 2001 - 2004, Disney Enterprises, Inc. All rights reserved
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//
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// All use of this software is subject to the terms of the Panda 3d
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// Software license. You should have received a copy of this license
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// along with this source code; you will also find a current copy of
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// the license at http://etc.cmu.edu/panda3d/docs/license/ .
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//
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// To contact the maintainers of this program write to
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// panda3d-general@lists.sourceforge.net .
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//
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////////////////////////////////////////////////////////////////////
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#include "materialAttrib.h"
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#include "attribSlots.h"
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#include "graphicsStateGuardianBase.h"
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#include "bamReader.h"
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#include "bamWriter.h"
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#include "datagram.h"
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#include "datagramIterator.h"
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TypeHandle MaterialAttrib::_type_handle;
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////////////////////////////////////////////////////////////////////
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// Function: MaterialAttrib::make
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// Access: Published, Static
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// Description: Constructs a new MaterialAttrib object suitable for
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// rendering the indicated material onto geometry.
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////////////////////////////////////////////////////////////////////
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CPT(RenderAttrib) MaterialAttrib::
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make(Material *material) {
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MaterialAttrib *attrib = new MaterialAttrib;
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attrib->_material = material;
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return return_new(attrib);
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}
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////////////////////////////////////////////////////////////////////
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// Function: MaterialAttrib::make_off
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// Access: Published, Static
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// Description: Constructs a new MaterialAttrib object suitable for
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// rendering unmateriald geometry.
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////////////////////////////////////////////////////////////////////
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CPT(RenderAttrib) MaterialAttrib::
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make_off() {
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MaterialAttrib *attrib = new MaterialAttrib;
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return return_new(attrib);
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}
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////////////////////////////////////////////////////////////////////
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// Function: MaterialAttrib::output
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// Access: Public, Virtual
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// Description:
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////////////////////////////////////////////////////////////////////
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void MaterialAttrib::
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output(ostream &out) const {
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out << get_type() << ":";
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if (is_off()) {
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out << "(off)";
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} else {
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out << *_material;
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}
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}
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////////////////////////////////////////////////////////////////////
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// Function: MaterialAttrib::compare_to_impl
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// Access: Protected, Virtual
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// Description: Intended to be overridden by derived MaterialAttrib
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// types to return a unique number indicating whether
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// this MaterialAttrib is equivalent to the other one.
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//
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// This should return 0 if the two MaterialAttrib objects
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// are equivalent, a number less than zero if this one
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// should be sorted before the other one, and a number
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// greater than zero otherwise.
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//
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// This will only be called with two MaterialAttrib
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// objects whose get_type() functions return the same.
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////////////////////////////////////////////////////////////////////
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int MaterialAttrib::
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compare_to_impl(const RenderAttrib *other) const {
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const MaterialAttrib *ta;
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DCAST_INTO_R(ta, other, 0);
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// Comparing pointers by subtraction is problematic. Instead of
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// doing this, we'll just depend on the built-in != and < operators
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// for comparing pointers.
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if (_material != ta->_material) {
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return _material < ta->_material ? -1 : 1;
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}
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return 0;
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}
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////////////////////////////////////////////////////////////////////
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// Function: MaterialAttrib::make_default_impl
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// Access: Protected, Virtual
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// Description: Intended to be overridden by derived MaterialAttrib
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// types to specify what the default property for a
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// MaterialAttrib of this type should be.
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//
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// This should return a newly-allocated MaterialAttrib of
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// the same type that corresponds to whatever the
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// standard default for this kind of MaterialAttrib is.
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////////////////////////////////////////////////////////////////////
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RenderAttrib *MaterialAttrib::
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make_default_impl() const {
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return new MaterialAttrib;
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}
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////////////////////////////////////////////////////////////////////
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// Function: MaterialAttrib::store_into_slot
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// Access: Public, Virtual
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// Description: Stores this attrib into the appropriate slot of
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// an object of class AttribSlots.
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////////////////////////////////////////////////////////////////////
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void MaterialAttrib::
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store_into_slot(AttribSlots *slots) const {
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slots->_material = this;
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}
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////////////////////////////////////////////////////////////////////
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// Function: MaterialAttrib::register_with_read_factory
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// Access: Public, Static
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// Description: Tells the BamReader how to create objects of type
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// MaterialAttrib.
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////////////////////////////////////////////////////////////////////
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void MaterialAttrib::
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register_with_read_factory() {
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BamReader::get_factory()->register_factory(get_class_type(), make_from_bam);
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}
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////////////////////////////////////////////////////////////////////
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// Function: MaterialAttrib::write_datagram
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// Access: Public, Virtual
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// Description: Writes the contents of this object to the datagram
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// for shipping out to a Bam file.
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////////////////////////////////////////////////////////////////////
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void MaterialAttrib::
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write_datagram(BamWriter *manager, Datagram &dg) {
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RenderAttrib::write_datagram(manager, dg);
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manager->write_pointer(dg, _material);
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}
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////////////////////////////////////////////////////////////////////
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// Function: MaterialAttrib::complete_pointers
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// Access: Public, Virtual
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// Description: Receives an array of pointers, one for each time
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// manager->read_pointer() was called in fillin().
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// Returns the number of pointers processed.
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////////////////////////////////////////////////////////////////////
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int MaterialAttrib::
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complete_pointers(TypedWritable **p_list, BamReader *manager) {
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int pi = RenderAttrib::complete_pointers(p_list, manager);
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TypedWritable *material = p_list[pi++];
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if (material != (TypedWritable *)NULL) {
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_material = DCAST(Material, material);
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}
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return pi;
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}
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////////////////////////////////////////////////////////////////////
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// Function: MaterialAttrib::make_from_bam
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// Access: Protected, Static
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// Description: This function is called by the BamReader's factory
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// when a new object of type MaterialAttrib is encountered
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// in the Bam file. It should create the MaterialAttrib
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// and extract its information from the file.
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////////////////////////////////////////////////////////////////////
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TypedWritable *MaterialAttrib::
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make_from_bam(const FactoryParams ¶ms) {
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MaterialAttrib *attrib = new MaterialAttrib;
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DatagramIterator scan;
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BamReader *manager;
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parse_params(params, scan, manager);
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attrib->fillin(scan, manager);
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return attrib;
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}
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////////////////////////////////////////////////////////////////////
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// Function: MaterialAttrib::fillin
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// Access: Protected
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// Description: This internal function is called by make_from_bam to
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// read in all of the relevant data from the BamFile for
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// the new MaterialAttrib.
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////////////////////////////////////////////////////////////////////
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void MaterialAttrib::
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fillin(DatagramIterator &scan, BamReader *manager) {
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RenderAttrib::fillin(scan, manager);
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// Read the _material pointer.
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manager->read_pointer(scan);
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}
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