SoQuadAreaLight.h

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 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.),            ***
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 ***                   COPYRIGHT (C) 1996-2025 BY FEI S.A.S,                        ***
 ***                        BORDEAUX, FRANCE                                        ***
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 **=======================================================================*/
 
#pragma once
 
#include <Inventor/nodes/SoLight.h>
#include <Inventor/nodes/SoSeparator.h>
#include <Inventor/nodes/SoTexture3.h>
 
#include <Inventor/fields/SoSFVec3f.h>
#include <Inventor/fields/SoSFRotation.h>
#include <Inventor/fields/SoSFFloat.h>
#include <Inventor/fields/SoSFBool.h>
 
class SoTextureUnit;
class SoShaderParameter1i;
class SoIndexedTriangleSet;
class SoSwitch;
class SoGLRenderAction;
class SoGetBoundingBoxAction;
class SoMaterial;

class  SoQuadAreaLight : public SoLight
{
  SO_NODE_HEADER(SoQuadAreaLight);
 
public:
  SoSFVec3f location;

  SoSFRotation orientation;

  SoSFFloat width;

  SoSFFloat height;

  SoSFBool twoSided;

  SoQuadAreaLight();
 
private:
  void GLRender(SoGLRenderAction* action) override;
  void getBoundingBox(SoGetBoundingBoxAction* action) override;
 
private:
  static void initClass();
  static void exitClass();

  SoSFBool display;
 
  void getCameras(SoState* state, SoPath* scene, float visibilityLength, SoNodeList& lightCams) override;
 
  static SoTexture3* getLTCTexture();
 
private:
  virtual ~SoQuadAreaLight();
 
private:
  void getUpAndRightVectors(SbVec3f& upVector, SbVec3f& rightVector) const;
  SoSeparator* getShapeSep();
 
  static SoRef<SoTexture3> s_ltcTexture;
  SoRef<SoSeparator> m_shapeSep;
  SoIndexedTriangleSet* m_shape;
  SoSwitch* m_displaySwitch;
  SoMaterial* m_shapeFrontMaterial;
  SoMaterial* m_shapeBackMaterial;
};