light.H

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/*
 * This file is part of the "Archon" framework.
 * (http://files3d.sourceforge.net)
 *
 * Copyright © 2002 by Kristian Spangsege and Brian Kristiansen.
 *
 * Permission to use, copy, modify, and distribute this software and
 * its documentation under the terms of the GNU General Public License is
 * hereby granted. No representations are made about the suitability of
 * this software for any purpose. It is provided "as is" without express
 * or implied warranty. See the GNU General Public License
 * (http://www.gnu.org/copyleft/gpl.html) for more details.
 *
 * The characters in this file are ISO8859-1 encoded.
 *
 * The documentation in this file is in "Doxygen" style
 * (http://www.doxygen.org).
 */

#ifndef ARCHON_X3D_LIGHT_H
#define ARCHON_X3D_LIGHT_H

#include <archon/math/vector.H>

#include <archon/x3d/server/core.H>
#include <archon/x3d/server/scene.H>

namespace Archon
{
  namespace X3D
  {
    using namespace Math;


    struct LightNode: virtual ChildNode
    {
      static const NodeType *type;

      double getAmbientIntensity() const { return ambientIntensity; }
      const Vector3 &getColor()    const { return color; }
      double getIntensity()        const { return intensity; }
      bool getOn()                 const { return on; }

    protected:
      LightNode():
        ambientIntensity(0), color(1, 1, 1),
        intensity(1), on(true) {}

    private:
      friend void initializeLightComponent();

      double  ambientIntensity;
      Vector3 color;
      double  intensity;
      bool    on;

      EventSource ambientIntensityChanged;
      EventSource colorChanged;
      EventSource intensityChanged;
      EventSource onChanged;

      Time ambientIntensityStamp;
      Time colorStamp;
      Time intensityStamp;
      Time onStamp;
    };


    struct DirectionalLight: LightNode
    {
      static Ref<NodeBase> instantiate(BackRef<ExecutionContext> c)
      {
        return new DirectionalLight(c);
      }

      static const NodeType *type;
      const NodeType *getType() const { return type; }

      DirectionalLight(BackRef<ExecutionContext> c):
        NodeBase(c),
        direction(0, 0, -1) {}

      const Vector3 &getDirection() const { return direction; }

    private:
      friend void initializeLightComponent();

      Vector3 direction;

      EventSource directionChanged;

      Time directionStamp;
    };


    struct PointLight: LightNode
    {
      static Ref<NodeBase> instantiate(BackRef<ExecutionContext> c)
      {
        return new PointLight(c);
      }

      static const NodeType *type;
      const NodeType *getType() const { return type; }

      PointLight(BackRef<ExecutionContext> c):
        NodeBase(c),
        attenuation(1, 0, 0),
        location(0, 0, 0),
        radius(100) {}

      const Vector3 &getAttenuation() const { return attenuation; }
      const Vector3 &getLocation()    const { return location; }
      double getRadius()              const { return radius; }

    private:
      friend void initializeLightComponent();

      Vector3 attenuation;
      Vector3 location;
      double  radius;

      EventSource attenuationChanged;
      EventSource locationChanged;
      EventSource radiusChanged;

      Time attenuationStamp;
      Time locationStamp;
      Time radiusStamp;
    };


    struct SpotLight: LightNode
    {
      static Ref<NodeBase> instantiate(BackRef<ExecutionContext> c)
      {
        return new SpotLight(c);
      }

      static const NodeType *type;
      const NodeType *getType() const { return type; }

      SpotLight(BackRef<ExecutionContext> c):
        NodeBase(c),
        attenuation(1, 0, 0),
        beamWidth(1.570796),
        cutOffAngle(0.785398),
        direction(0, 0, -1),
        location(0, 0, 0),
        radius(100) {}

      const  Vector3 &getAttenuation() const { return attenuation; }
      double getBeamWidth()            const { return beamWidth; }
      double getCutOffAngle()          const { return cutOffAngle; }
      const  Vector3 &getDirection()   const { return direction; }
      const  Vector3 &getLocation()    const { return location; }
      double getRadius()               const { return radius; }

    private:
      friend void initializeLightComponent();

      Vector3 attenuation;
      double  beamWidth;
      double  cutOffAngle;
      Vector3 direction;
      Vector3 location;
      double  radius;

      EventSource attenuationChanged;
      EventSource beamWidthChanged;
      EventSource cutOffAngleChanged;
      EventSource directionChanged;
      EventSource locationChanged;
      EventSource radiusChanged;

      Time attenuationStamp;
      Time beamWidthStamp;
      Time cutOffAngleStamp;
      Time directionStamp;
      Time locationStamp;
      Time radiusStamp;
    };
  }
}

#endif // ARCHON_X3D_LIGHT_H

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