227 lines
9.1 KiB
C++
227 lines
9.1 KiB
C++
// Filename: drawMaskAttrib.cxx
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// Created by: drose (28Sep05)
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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) Carnegie Mellon University. All rights reserved.
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//
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// All use of this software is subject to the terms of the revised BSD
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// license. You should have received a copy of this license along
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// with this source code in a file named "LICENSE."
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//
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////////////////////////////////////////////////////////////////////
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#include "drawMaskAttrib.h"
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#include "dcast.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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#include "cullTraverser.h"
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#include "config_pgraph.h"
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TypeHandle DrawMaskAttrib::_type_handle;
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////////////////////////////////////////////////////////////////////
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// Function: DrawMaskAttrib::make
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// Access: Published, Static
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// Description: Constructs a new DrawMaskAttrib that changes the
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// bits_to_change bits in the current DrawMask to the
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// values of the corresponding bits in new_mask. Only
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// those bits in common with bits_to_change are
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// affected.
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////////////////////////////////////////////////////////////////////
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CPT(RenderAttrib) DrawMaskAttrib::
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make(DrawMask new_mask, DrawMask bits_to_change) {
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DrawMaskAttrib *attrib = new DrawMaskAttrib(new_mask, bits_to_change);
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return return_new(attrib);
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}
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////////////////////////////////////////////////////////////////////
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// Function: DrawMaskAttrib::output
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// Access: Public, Virtual
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// Description:
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////////////////////////////////////////////////////////////////////
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void DrawMaskAttrib::
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output(ostream &out) const {
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out << get_type() << ":" << get_new_mask() << "/" << get_bits_to_change();
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}
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////////////////////////////////////////////////////////////////////
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// Function: DrawMaskAttrib::compare_to_impl
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// Access: Protected, Virtual
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// Description: Intended to be overridden by derived DrawMaskAttrib
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// types to return a unique number indicating whether
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// this DrawMaskAttrib is equivalent to the other one.
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//
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// This should return 0 if the two DrawMaskAttrib 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 DrawMaskAttrib
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// objects whose get_type() functions return the same.
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////////////////////////////////////////////////////////////////////
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int DrawMaskAttrib::
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compare_to_impl(const RenderAttrib *other) const {
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const DrawMaskAttrib *ta;
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DCAST_INTO_R(ta, other, 0);
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int compare = get_new_mask().compare_to(ta->get_new_mask());
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if (compare != 0) {
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return compare;
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}
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compare = get_bits_to_change().compare_to(ta->get_bits_to_change());
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return compare;
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}
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////////////////////////////////////////////////////////////////////
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// Function: DrawMaskAttrib::compose_impl
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// Access: Protected, Virtual
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// Description: Intended to be overridden by derived RenderAttrib
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// types to specify how two consecutive RenderAttrib
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// objects of the same type interact.
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//
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// This should return the result of applying the other
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// RenderAttrib to a node in the scene graph below this
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// RenderAttrib, which was already applied. In most
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// cases, the result is the same as the other
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// RenderAttrib (that is, a subsequent RenderAttrib
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// completely replaces the preceding one). On the other
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// hand, some kinds of RenderAttrib (for instance,
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// ColorTransformAttrib) might combine in meaningful
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// ways.
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////////////////////////////////////////////////////////////////////
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CPT(RenderAttrib) DrawMaskAttrib::
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compose_impl(const RenderAttrib *other) const {
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const DrawMaskAttrib *ta;
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DCAST_INTO_R(ta, other, 0);
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DrawMask mask = get_new_mask();
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mask = (mask & ~ta->get_bits_to_change()) | ta->get_new_mask();
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DrawMaskAttrib *attrib = new DrawMaskAttrib(mask, DrawMask::all_on());
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return return_new(attrib);
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}
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////////////////////////////////////////////////////////////////////
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// Function: DrawMaskAttrib::make_default_impl
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// Access: Protected, Virtual
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// Description: Intended to be overridden by derived DrawMaskAttrib
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// types to specify what the default property for a
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// DrawMaskAttrib of this type should be.
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//
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// This should return a newly-allocated DrawMaskAttrib of
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// the same type that corresponds to whatever the
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// standard default for this kind of DrawMaskAttrib is.
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////////////////////////////////////////////////////////////////////
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RenderAttrib *DrawMaskAttrib::
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make_default_impl() const {
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return new DrawMaskAttrib(DrawMask::all_on(), DrawMask::all_on());
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}
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////////////////////////////////////////////////////////////////////
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// Function: DrawMaskAttrib::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 DrawMaskAttrib::
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store_into_slot(AttribSlots *) const {
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// There's no need to store a DrawMaskAttrib at the moment, since it
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// doesn't actually change any rendering state.
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}
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////////////////////////////////////////////////////////////////////
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// Function: DrawMaskAttrib::has_cull_callback
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// Access: Public, Virtual
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// Description: Should be overridden by derived classes to return
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// true if cull_callback() has been defined. Otherwise,
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// returns false to indicate cull_callback() does not
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// need to be called for this node during the cull
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// traversal.
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////////////////////////////////////////////////////////////////////
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bool DrawMaskAttrib::
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has_cull_callback() const {
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return (_new_mask != DrawMask::all_on());
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}
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////////////////////////////////////////////////////////////////////
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// Function: DrawMaskAttrib::cull_callback
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// Access: Public, Virtual
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// Description: If has_cull_callback() returns true, this function
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// will be called during the cull traversal to perform
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// any additional operations that should be performed at
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// cull time.
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//
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// This is called each time the RenderAttrib is
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// discovered applied to a Geom in the traversal. It
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// should return true if the Geom is visible, false if
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// it should be omitted.
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////////////////////////////////////////////////////////////////////
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bool DrawMaskAttrib::
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cull_callback(CullTraverser *trav, const CullTraverserData &) const {
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return (trav->get_camera_mask() & _new_mask) != 0;
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}
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////////////////////////////////////////////////////////////////////
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// Function: DrawMaskAttrib::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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// DrawMaskAttrib.
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////////////////////////////////////////////////////////////////////
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void DrawMaskAttrib::
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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: DrawMaskAttrib::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 DrawMaskAttrib::
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write_datagram(BamWriter *manager, Datagram &dg) {
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RenderAttrib::write_datagram(manager, dg);
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dg.add_uint32(_new_mask.get_word());
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dg.add_uint32(_bits_to_change.get_word());
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}
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////////////////////////////////////////////////////////////////////
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// Function: DrawMaskAttrib::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 DrawMaskAttrib is encountered
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// in the Bam file. It should create the DrawMaskAttrib
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// and extract its information from the file.
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////////////////////////////////////////////////////////////////////
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TypedWritable *DrawMaskAttrib::
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make_from_bam(const FactoryParams ¶ms) {
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DrawMaskAttrib *attrib = new DrawMaskAttrib(0, 0);
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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: DrawMaskAttrib::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 DrawMaskAttrib.
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////////////////////////////////////////////////////////////////////
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void DrawMaskAttrib::
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fillin(DatagramIterator &scan, BamReader *manager) {
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RenderAttrib::fillin(scan, manager);
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_new_mask.set_word(scan.get_uint32());
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_bits_to_change.set_word(scan.get_uint32());
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}
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