330 lines
13 KiB
Plaintext
330 lines
13 KiB
Plaintext
// Filename: textureAttrib.I
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// Created by: drose (21Feb02)
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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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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::Constructor
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// Access: Protected
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// Description: Use TextureAttrib::make() to construct a new
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// TextureAttrib object.
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////////////////////////////////////////////////////////////////////
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INLINE TextureAttrib::
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TextureAttrib() {
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_next_implicit_sort = 0;
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_off_all_stages = false;
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_sort_seq = UpdateSeq::old();
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_filtered_seq = UpdateSeq::old();
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}
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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::Copy Constructor
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// Access: Protected
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// Description: Use TextureAttrib::make() to construct a new
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// TextureAttrib object. The copy constructor is only
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// defined to facilitate methods like add_on_stage().
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////////////////////////////////////////////////////////////////////
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INLINE TextureAttrib::
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TextureAttrib(const TextureAttrib ©) :
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_on_stages(copy._on_stages),
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_render_stages(copy._render_stages),
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_render_ff_stages(copy._render_ff_stages),
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_next_implicit_sort(copy._next_implicit_sort),
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_off_stages(copy._off_stages),
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_off_all_stages(copy._off_all_stages),
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_sort_seq(copy._sort_seq),
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_filtered_seq(UpdateSeq::old())
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{
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}
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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::is_off
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// Access: Published
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// Description: Returns true if the TextureAttrib is an 'off'
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// TextureAttrib, indicating that it should disable
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// texturing.
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//
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// If multitexture is in effect, a TextureAttrib may not
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// be strictly "on" or "off"; therefore, to get a more
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// precise answer to this question, you should consider
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// using has_all_off() or get_num_off_stages() or
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// has_off_stage() instead.
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////////////////////////////////////////////////////////////////////
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INLINE bool TextureAttrib::
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is_off() const {
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return (_on_stages.empty());
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}
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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::get_texture
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// Access: Published
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// Description: If the TextureAttrib is not an 'off' TextureAttrib,
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// returns the base-level texture that is associated.
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// Otherwise, return NULL.
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////////////////////////////////////////////////////////////////////
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INLINE Texture *TextureAttrib::
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get_texture() const {
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if (_on_stages.empty()) {
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return NULL;
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}
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check_sorted();
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return get_on_texture(filter_to_max(1)->get_on_stage(0));
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}
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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::get_num_on_stages
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// Access: Published
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// Description: Returns the number of stages that are turned on by
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// the attribute.
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////////////////////////////////////////////////////////////////////
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INLINE int TextureAttrib::
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get_num_on_stages() const {
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check_sorted();
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return _render_stages.size();
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}
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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::get_on_stage
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// Access: Published
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// Description: Returns the nth stage turned on by the attribute,
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// sorted in render order.
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////////////////////////////////////////////////////////////////////
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INLINE TextureStage *TextureAttrib::
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get_on_stage(int n) const {
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nassertr(n >= 0 && n < (int)_render_stages.size(), (TextureStage *)NULL);
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return _render_stages[n]->_stage;
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}
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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::get_num_on_ff_stages
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// Access: Published
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// Description: Returns the number of on-stages that are relevant
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// to the classic fixed function pipeline. This excludes
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// texture stages such as normal maps.
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////////////////////////////////////////////////////////////////////
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INLINE int TextureAttrib::
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get_num_on_ff_stages() const {
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check_sorted();
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return _render_ff_stages.size();
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}
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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::get_render_ff_stage
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// Access: Published
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// Description: Returns the nth stage turned on by the attribute,
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// sorted in render order, including only those relevant
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// to the classic fixed function pipeline. This excludes
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// texture stages such as normal maps.
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////////////////////////////////////////////////////////////////////
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INLINE TextureStage *TextureAttrib::
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get_on_ff_stage(int n) const {
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nassertr(n >= 0 && n < (int)_render_ff_stages.size(), (TextureStage *)NULL);
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return _render_ff_stages[n]->_stage;
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}
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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::get_ff_tc_index
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// Access: Published
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// Description: For each TextureStage listed in get_on_ff_stage(),
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// this returns a unique index number for the texture
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// coordinate name used by that TextureStage. It is
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// guaranteed to remain the same index number for each
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// texcoord name (for a given set of TextureStages),
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// even if the texture render order changes.
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////////////////////////////////////////////////////////////////////
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INLINE int TextureAttrib::
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get_ff_tc_index(int n) const {
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nassertr(n >= 0 && n < (int)_render_ff_stages.size(), -1);
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return _render_ff_stages[n]->_ff_tc_index;
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}
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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::has_on_stage
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// Access: Published
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// Description: Returns true if the indicated stage is turned on by
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// the attrib, false otherwise.
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////////////////////////////////////////////////////////////////////
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INLINE bool TextureAttrib::
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has_on_stage(TextureStage *stage) const {
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return _on_stages.find(StageNode(stage)) != _on_stages.end();
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}
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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::get_on_texture
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// Access: Published
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// Description: Returns the texture associated with the indicated
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// stage, or NULL if no texture is associated.
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////////////////////////////////////////////////////////////////////
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INLINE Texture *TextureAttrib::
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get_on_texture(TextureStage *stage) const {
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Stages::const_iterator si;
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si = _on_stages.find(StageNode(stage));
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if (si != _on_stages.end()) {
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return (*si)._texture;
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}
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return NULL;
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}
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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::get_on_stage_override
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// Access: Published
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// Description: Returns the override value associated with the
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// indicated stage.
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////////////////////////////////////////////////////////////////////
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INLINE int TextureAttrib::
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get_on_stage_override(TextureStage *stage) const {
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Stages::const_iterator si;
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si = _on_stages.find(StageNode(stage));
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if (si != _on_stages.end()) {
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return (*si)._override;
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}
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nassert_raise("Specified TextureStage not included in attrib");
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return 0;
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}
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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::get_num_off_stages
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// Access: Published
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// Description: Returns the number of stages that are turned off by
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// the attribute.
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////////////////////////////////////////////////////////////////////
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INLINE int TextureAttrib::
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get_num_off_stages() const {
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return _off_stages.size();
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}
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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::get_off_stage
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// Access: Published
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// Description: Returns the nth stage turned off by the attribute,
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// sorted in arbitrary (pointer) order.
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////////////////////////////////////////////////////////////////////
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INLINE TextureStage *TextureAttrib::
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get_off_stage(int n) const {
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nassertr(n >= 0 && n < (int)_off_stages.size(), (TextureStage *)NULL);
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return _off_stages[n]._stage;
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}
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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::has_off_stage
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// Access: Published
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// Description: Returns true if the indicated stage is turned off by
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// the attrib, false otherwise.
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////////////////////////////////////////////////////////////////////
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INLINE bool TextureAttrib::
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has_off_stage(TextureStage *stage) const {
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return _off_stages.find(StageNode(stage)) != _off_stages.end() ||
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(_off_all_stages && !has_on_stage(stage));
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}
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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::has_all_off
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// Access: Published
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// Description: Returns true if this attrib turns off all stages
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// (although it may also turn some on).
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////////////////////////////////////////////////////////////////////
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INLINE bool TextureAttrib::
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has_all_off() const {
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return _off_all_stages;
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}
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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::is_identity
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// Access: Published
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// Description: Returns true if this is an identity attrib: it does
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// not change the set of stages in use.
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////////////////////////////////////////////////////////////////////
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INLINE bool TextureAttrib::
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is_identity() const {
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return _on_stages.empty() && _off_stages.empty() && !_off_all_stages;
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}
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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::check_sorted
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// Access: Private
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// Description: Confirms whether the _on_stages list is still sorted.
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// It will become unsorted if someone calls
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// TextureStage::set_sort().
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//
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// If the list requires sorting, transparently sorts it
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// before returning.
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////////////////////////////////////////////////////////////////////
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INLINE void TextureAttrib::
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check_sorted() const {
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if (_sort_seq != TextureStage::get_sort_seq()) {
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((TextureAttrib *)this)->sort_on_stages();
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}
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}
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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::StageNode::Constructor
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// Access: Public
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// Description:
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////////////////////////////////////////////////////////////////////
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INLINE TextureAttrib::StageNode::
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StageNode(const TextureStage *stage, unsigned int implicit_sort, int override) :
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// Yeah, we cast away the constness here. Just too much trouble to
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// deal with it properly.
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_stage((TextureStage *)stage),
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_implicit_sort(implicit_sort),
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_override(override)
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{
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}
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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::CompareTextureStagePriorities::operator ()
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// Access: Public
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// Description: This STL function object is used to sort a list of
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// texture stages in reverse order by priority, and
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// within priority, within order by sort.
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////////////////////////////////////////////////////////////////////
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INLINE bool TextureAttrib::CompareTextureStagePriorities::
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operator () (const TextureAttrib::StageNode *a,
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const TextureAttrib::StageNode *b) const {
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if (a->_stage->get_priority() != b->_stage->get_priority()) {
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return a->_stage->get_priority() > b->_stage->get_priority();
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}
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if (a->_stage->get_sort() != b->_stage->get_sort()) {
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return a->_stage->get_sort() < b->_stage->get_sort();
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}
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return a->_implicit_sort < b->_implicit_sort;
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}
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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::CompareTextureStageSort::operator ()
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// Access: Public
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// Description: This STL function object is used to sort a list of
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// texture stages in order by sort.
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////////////////////////////////////////////////////////////////////
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INLINE bool TextureAttrib::CompareTextureStageSort::
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operator () (const TextureAttrib::StageNode *a,
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const TextureAttrib::StageNode *b) const {
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if (a->_stage->get_sort() != b->_stage->get_sort()) {
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return a->_stage->get_sort() < b->_stage->get_sort();
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}
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return a->_implicit_sort < b->_implicit_sort;
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}
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////////////////////////////////////////////////////////////////////
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// Function: TextureAttrib::CompareTextureStagePointer::operator ()
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// Access: Public
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// Description: This STL function object is used to sort a list of
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// texture stages in order by pointer.
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////////////////////////////////////////////////////////////////////
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INLINE bool TextureAttrib::CompareTextureStagePointer::
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operator () (const TextureAttrib::StageNode &a,
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const TextureAttrib::StageNode &b) const {
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return a._stage < b._stage;
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}
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