151 lines
4.3 KiB
C++
151 lines
4.3 KiB
C++
// Filename: light.h
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// Created by: mike (09Jan97)
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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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#ifndef LIGHT_H
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#define LIGHT_H
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#include "pandabase.h"
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#include "referenceCount.h"
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#include "luse.h"
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#include "cycleData.h"
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#include "cycleDataReader.h"
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#include "cycleDataLockedReader.h"
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#include "cycleDataWriter.h"
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#include "pipelineCycler.h"
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#include "updateSeq.h"
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#include "geomNode.h"
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class NodePath;
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class PandaNode;
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class GraphicsStateGuardianBase;
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////////////////////////////////////////////////////////////////////
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// Class : Light
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// Description : The abstract interface to all kinds of lights. The
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// actual light objects also inherit from PandaNode, and
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// can therefore be added to the scene graph at some
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// arbitrary point to define the coordinate system of
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// effect.
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////////////////////////////////////////////////////////////////////
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class EXPCL_PANDA_PGRAPH Light {
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PUBLISHED:
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INLINE Light();
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INLINE Light(const Light ©);
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virtual ~Light();
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virtual PandaNode *as_node()=0;
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virtual bool is_ambient_light() const;
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INLINE const LColor &get_color() const;
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INLINE void set_color(const LColor &color);
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virtual PN_stdfloat get_exponent() const;
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virtual const LColor &get_specular_color() const;
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virtual const LVecBase3 &get_attenuation() const;
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INLINE void set_priority(int priority);
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INLINE int get_priority() const;
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virtual int get_class_priority() const=0;
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public:
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virtual void output(ostream &out) const=0;
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virtual void write(ostream &out, int indent_level) const=0;
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virtual void bind(GraphicsStateGuardianBase *gsg, const NodePath &light,
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int light_id)=0;
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virtual bool get_vector_to_light(LVector3 &result,
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const LPoint3 &from_object_point,
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const LMatrix4 &to_object_space);
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GeomNode *get_viz();
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INLINE static UpdateSeq get_sort_seq();
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protected:
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virtual void fill_viz_geom(GeomNode *viz_geom);
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INLINE void mark_viz_stale();
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// This enumerated class defines the relative class priority of
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// different kinds of lights. This hierarchy is only used to
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// resolve multiple lights of the same priority specified by
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// set_priority(). In general, the first items in this list have a
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// lesser priority than later items.
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enum ClassPriority {
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CP_ambient_priority,
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CP_point_priority,
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CP_directional_priority,
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CP_spot_priority,
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};
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private:
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// The priority is not cycled, because there's no real reason to do
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// so, and cycling it makes it difficult to synchronize with the
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// LightAttribs.
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int _priority;
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static UpdateSeq _sort_seq;
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// This is the data that must be cycled between pipeline stages.
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class EXPCL_PANDA_PGRAPH CData : public CycleData {
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public:
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INLINE CData();
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INLINE CData(const CData ©);
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virtual CycleData *make_copy() const;
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virtual void write_datagram(BamWriter *manager, Datagram &dg) const;
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virtual void fillin(DatagramIterator &scan, BamReader *manager);
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virtual TypeHandle get_parent_type() const {
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return Light::get_class_type();
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}
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LColor _color;
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PT(GeomNode) _viz_geom;
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bool _viz_geom_stale;
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};
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PipelineCycler<CData> _cycler;
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typedef CycleDataReader<CData> CDReader;
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typedef CycleDataLockedReader<CData> CDLockedReader;
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typedef CycleDataWriter<CData> CDWriter;
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protected:
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void write_datagram(BamWriter *manager, Datagram &dg);
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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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ReferenceCount::init_type();
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register_type(_type_handle, "Light",
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ReferenceCount::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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private:
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static TypeHandle _type_handle;
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};
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INLINE ostream &operator << (ostream &out, const Light &light) {
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light.output(out);
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return out;
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}
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#include "light.I"
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#endif
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