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103 lines
3.1 KiB
C++
103 lines
3.1 KiB
C++
// Filename: lightRampAttrib.h
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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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#ifndef LIGHTRAMPATTRIB_H
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#define LIGHTRAMPATTRIB_H
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#include "pandabase.h"
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#include "renderAttrib.h"
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class FactoryParams;
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////////////////////////////////////////////////////////////////////
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// Class : LightRampAttrib
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// Description : The LightRampAttrib alters the light level reaching
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// the surface of the model by applying a "ramp" function.
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// Typically, this is used for cartoon lighting, in which
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// case the ramp is a step-function.
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//
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// LightRampAttrib is relevant only when lighting and
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// shader generation are both enabled. Otherwise, it has
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// no effect. The light ramp only affects the diffuse
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// contribution. Ambient light is not ramped.
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//
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////////////////////////////////////////////////////////////////////
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class EXPCL_PANDA_PGRAPH LightRampAttrib : public RenderAttrib {
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private:
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INLINE LightRampAttrib();
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PUBLISHED:
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enum LightRampMode {
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LRT_identity,
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LRT_single_threshold,
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LRT_double_threshold,
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};
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static CPT(RenderAttrib) make_identity();
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static CPT(RenderAttrib) make_single_threshold(float thresh0, float lev0);
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static CPT(RenderAttrib) make_double_threshold(float thresh0, float lev0, float thresh1, float lev1);
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INLINE LightRampMode get_mode() const;
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INLINE float get_level(int n) const;
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INLINE float get_threshold(int n) const;
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public:
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virtual void output(ostream &out) const;
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virtual void store_into_slot(AttribSlots *slots) const;
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protected:
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virtual int compare_to_impl(const RenderAttrib *other) const;
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virtual RenderAttrib *make_default_impl() const;
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private:
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LightRampMode _mode;
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float _level[2];
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float _threshold[2];
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static CPT(RenderAttrib) LightRampAttrib::_identity;
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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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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, "LightRampAttrib",
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RenderAttrib::get_class_type());
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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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};
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#include "lightRampAttrib.I"
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#endif
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