150 lines
4.5 KiB
C++
150 lines
4.5 KiB
C++
/**
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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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* @file texGenAttrib.h
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* @author masad
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* @date 2004-06-21
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*/
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#ifndef TEXGENATTRIB_H
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#define TEXGENATTRIB_H
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#include "pandabase.h"
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#include "geom.h"
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#include "renderAttrib.h"
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#include "textureStage.h"
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#include "texture.h"
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#include "pointerTo.h"
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#include "nodePath.h"
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/**
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* Computes texture coordinates for geometry automatically based on vertex
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* position and/or normal. This can be used to implement reflection and/or
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* refraction maps, for instance to make shiny surfaces, as well as other
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* special effects such as projective texturing.
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*/
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class EXPCL_PANDA_PGRAPH TexGenAttrib : public RenderAttrib {
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PUBLISHED:
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// We inherit the definition of our Mode enumerated type from RenderAttrib.
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// Normally, Mode would be defined here, but we define it in the base class
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// instead as a hack to avoid a problem with circular includes.
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typedef RenderAttrib::TexGenMode Mode;
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protected:
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INLINE TexGenAttrib();
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INLINE TexGenAttrib(const TexGenAttrib ©);
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public:
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virtual ~TexGenAttrib();
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PUBLISHED:
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static CPT(RenderAttrib) make();
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static CPT(RenderAttrib) make(TextureStage *stage, Mode mode);
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static CPT(RenderAttrib) make_default();
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CPT(RenderAttrib) add_stage(TextureStage *stage, Mode mode) const;
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CPT(RenderAttrib) add_stage(TextureStage *stage, Mode mode, const LTexCoord3 &constant_value) const;
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CPT(RenderAttrib) remove_stage(TextureStage *stage) const;
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bool is_empty() const;
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bool has_stage(TextureStage *stage) const;
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Mode get_mode(TextureStage *stage) const;
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bool has_gen_texcoord_stage(TextureStage *stage) const;
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const LTexCoord3 &get_constant_value(TextureStage *stage) const;
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INLINE int get_geom_rendering(int geom_rendering) const;
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public:
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virtual void output(std::ostream &out) const;
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protected:
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virtual int compare_to_impl(const RenderAttrib *other) const;
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virtual size_t get_hash_impl() const;
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virtual CPT(RenderAttrib) compose_impl(const RenderAttrib *other) const;
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virtual CPT(RenderAttrib) invert_compose_impl(const RenderAttrib *other) const;
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private:
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class ModeDef;
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void filled_stages();
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void record_stage(TextureStage *stage, ModeDef &mode_def);
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class ModeDef {
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public:
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INLINE ModeDef();
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INLINE int compare_to(const ModeDef &other) const;
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Mode _mode;
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std::string _source_name;
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NodePath _light;
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LTexCoord3 _constant_value;
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};
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typedef pmap<PT(TextureStage), ModeDef> Stages;
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Stages _stages;
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// This is a set of TextureStage pointers for which texture coordinates will
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// not be needed from the Geom. It's redundant; it's almost the same set
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// that is listed in _stages, above. It's just here as an optimization
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// during rendering.
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typedef pset<TextureStage *> NoTexCoordStages;
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NoTexCoordStages _no_texcoords;
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// This element is only used during reading from a bam file. It has no
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// meaningful value any other time.
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pvector<Mode> _read_modes;
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int _num_point_sprites;
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// _point_geom_rendering is the GeomRendering bits that are added by the
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// TexGenAttrib if there are any points in the Geom. _geom_rendering is the
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// GeomRendering bits that are added regardless of the kind of Geom it is.
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int _point_geom_rendering;
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int _geom_rendering;
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static CPT(RenderAttrib) _empty_attrib;
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PUBLISHED:
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static int get_class_slot() {
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return _attrib_slot;
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}
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virtual int get_slot() const {
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return get_class_slot();
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}
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MAKE_PROPERTY(class_slot, get_class_slot);
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public:
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static void register_with_read_factory();
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virtual void write_datagram(BamWriter *manager, Datagram &dg);
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virtual int complete_pointers(TypedWritable **plist, BamReader *manager);
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protected:
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static TypedWritable *make_from_bam(const FactoryParams ¶ms);
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void fillin(DatagramIterator &scan, BamReader *manager);
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public:
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static TypeHandle get_class_type() {
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return _type_handle;
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}
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static void init_type() {
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RenderAttrib::init_type();
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register_type(_type_handle, "TexGenAttrib",
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RenderAttrib::get_class_type());
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_attrib_slot = register_slot(_type_handle, 100, new TexGenAttrib);
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}
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virtual TypeHandle get_type() const {
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return get_class_type();
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}
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virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
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private:
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static TypeHandle _type_handle;
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static int _attrib_slot;
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};
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#include "texGenAttrib.I"
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#endif
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