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/*=========================================================================
Program: ParaView
Module: vtkPVLightingHelper.h
Copyright (c) Kitware, Inc.
All rights reserved.
See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// .NAME vtkPVLightingHelper - helper to assist in simulating lighting similar
// to default OpenGL pipeline.
// .SECTION Description
// vtkPVLightingHelper is an helper to assist in simulating lighting similar
// to default OpenGL pipeline. Look at vtkPVLightingHelper_s for available
// GLSL functions.
#ifndef vtkPVLightingHelper_h
#define vtkPVLightingHelper_h
#include "vtkObject.h"
#include "vtkShader2.h" // for vtkShader2Type
class vtkShaderProgram2;
class VTK_EXPORT vtkPVLightingHelper : public vtkObject
{
public:
static vtkPVLightingHelper* New();
vtkTypeMacro(vtkPVLightingHelper, vtkObject);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Get/Set the shader program to which we want to add the lighting kernels.
// mode = VTK_SHADER_TYPE_VERTEX or VTK_SHADER_TYPE_FRAGMENT
// depending on whether the vertex lighting or fragment lighting is to be
// used.
void Initialize(vtkShaderProgram2* shader, vtkShader2Type mode);
vtkGetObjectMacro(Shader, vtkShaderProgram2);
// Description:
// Updates any lighting specific information needed.
// This must be called before the shader program is bound.
void PrepareForRendering();
protected:
vtkPVLightingHelper();
~vtkPVLightingHelper();
void SetShader(vtkShaderProgram2* shader);
vtkShaderProgram2* Shader;
private:
vtkPVLightingHelper(const vtkPVLightingHelper&) VTK_DELETE_FUNCTION;
void operator=(const vtkPVLightingHelper&) VTK_DELETE_FUNCTION;
};
#endif
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