mitkEncodedGradientShader.h

/*=========================================================================

  Program:   3DMed
  Date:      $Date: 2014-02-25 18:30:00 +0800 $
  Version:   $Version: 4.6.0 $
  Copyright: MIPG, Institute of Automation, Chinese Academy of Sciences

=========================================================================*/


#ifndef __mitkEncodedGradientShader_h
#define __mitkEncodedGradientShader_h

#include "mitkObject.h"
#include "mitkVisualizationIncludes.h"

#define MITK_MAX_SHADING_TABLES   100

class mitkVolumeModel;
class mitkScene;
class mitkEncodedGradientEstimator;

class MITK_VISUALIZATION_API mitkEncodedGradientShader : public mitkObject
{
public:
    //operations
    MITK_TYPE(mitkEncodedGradientShader,mitkObject)
        
    mitkEncodedGradientShader();    
    
    virtual void  SetZeroNormalDiffuseIntensity(float fZDiffuseIntensity);
    virtual float GetZeroNormalDiffuseIntensityMinValue(){return 0.0f;}
    virtual float GetZeroNormalDiffuseIntensityMaxValue(){return 1.0f;}
    virtual float GetZeroNormalDiffuseIntensity(){return m_ZeroNormalDiffuseIntensity;}
    
    virtual void  SetZeroNormalSpecularIntensity(float fZSpecularIntensity);
    virtual float GetZeroNormalSpecularIntensityMinValue(){return 0.0f;}
    virtual float GetZeroNormalSpecularIntensityMaxValue(){return 1.0f;}    
    virtual float GetZeroNormalSpecularIntensity(){return m_ZeroNormalSpecularIntensity;}   
    
    
    void UpdateShadingTable(mitkScene *scene, mitkVolumeModel *vol, mitkEncodedGradientEstimator *gradest);
    
    
    float *GetRedDiffuseShadingTable(    mitkVolumeModel *vol );
    float *GetGreenDiffuseShadingTable(  mitkVolumeModel *vol );
    float *GetBlueDiffuseShadingTable(   mitkVolumeModel *vol );
    float *GetRedSpecularShadingTable(   mitkVolumeModel *vol );
    float *GetGreenSpecularShadingTable( mitkVolumeModel *vol );
    float *GetBlueSpecularShadingTable(  mitkVolumeModel *vol );
    
    
    
protected:
    virtual ~mitkEncodedGradientShader();

    //operations:    
    // Description:
    // Build a shading table for a light with the specified direction,
    // and color for an object of the specified material properties.
    // material[0] = ambient, material[1] = diffuse, material[2] = specular
    // and material[3] = specular exponent.  If the ambient flag is 1, 
    // then ambient illumination is added. If not, then this means we 
    // are calculating the "other side" of two sided lighting, so no 
    // ambient intensity is added in. If the update flag is 0,
    // the shading table is overwritten with these new shading values.
    // If the updateFlag is 1, then the computed light contribution is
    // added to the current shading table values. There is one shading
    // table per volume, and the index value indicated which index table
    // should be used. It is computed in the UpdateShadingTable method.
    void _buildShadingTable(int index, float lightDirection[3], float lightColor[3], float lightIntensity, float viewDirection[3],
                            float material[4], mitkEncodedGradientEstimator *gradest);

    // Attributes
    // The six shading tables (r diffuse ,g diffuse ,b diffuse, 
    // r specular, g specular, b specular ) - with an entry for each
    // encoded normal plus one entry at the end for the zero normal
    // There is one shading table per volume listed in the ShadingTableVolume
    // array. A null entry indicates an available slot.
    float                        *m_ShadingTable[MITK_MAX_SHADING_TABLES][6];
    mitkVolumeModel              *m_ShadingTableVolume[MITK_MAX_SHADING_TABLES];
    int                          m_ShadingTableSize[MITK_MAX_SHADING_TABLES];
    
    // The intensity of light used for the zero normals, since it
    // can not be computed from the normal angles. Defaults to 0.0.
    float    m_ZeroNormalDiffuseIntensity;
    float    m_ZeroNormalSpecularIntensity;
    
    
private:    
    mitkEncodedGradientShader(const mitkEncodedGradientShader&);
    void operator=(const mitkEncodedGradientShader&);
};


//#define DEFINED_mitkEncodedGradientShader
 


#endif

/*=========================================================================

  Program:   Visualization Toolkit
  Module:    $RCSfile$
  Language:  C++
  Date:      $Date: 2006-04-28 10:35:09 +0800 (ÐÇÆÚÎå, 28 ËÄÔÂ 2006) $
  Version:   $Revision: 2 $


Copyright (c) 1993-2002 Ken Martin, Will Schroeder, Bill Lorensen 
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.

 * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

 * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
   of any contributors may be used to endorse or promote products derived
   from this software without specific prior written permission.

 * Modified source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

=========================================================================*/ 

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