source: trunk/vizservers/nanovis/HeightMap.h @ 916

#ifndef _HEIGHT_MAP_H_
#define _HEIGHT_MAP_H_

#include <Cg/cgGL.h>
#include <Cg/cg.h>
#include <R2/graphics/R2Geometry.h>
#include "TransferFunction.h"
#include "NvShader.h"
#include "Vector3.h"
#include <RenderContext.h>

namespace graphics {
class RenderContext;
};

/**
 *@class HeightMap
 *@brief Create a surface from height map and line contour of the generated surface
 */
class HeightMap {
    unsigned int _vertexBufferObjectID;
    unsigned int _textureBufferObjectID;
    
    int _vertexCount;
    CGparameter _tf;
    R2Geometry* _contour;
    TransferFunction* _colorMap;
    NvShader* _shader;
    int* _indexBuffer;
    int _indexCount;
    Vector3 _contourColor;
    
    bool _contourVisible;
    bool _visible;
    
    Vector3 _scale;
    Vector3 _centerPoint;

    double _vmin;               // minimum (unscaled) value in data
    double _vmax;               // maximum (unscaled) value in data


public :
    /**
     *@brief Constructor
     */
        HeightMap();
    /**
     *@brief Destructor
     */
        ~HeightMap();

private :
        void createIndexBuffer(int xCount, int zCount, int*& indexBuffer, int& indexCount, float* heights);
        Vector3* createHeightVertices(float startX, float startY, float endX, float endY, int xCount, int yCount, float* height);
        void reset();
public :
        void render(graphics::RenderContext* renderContext);
    /**
     *@brief Create a height map with heigh values
     *@param startX a x position of the first height value
     *@param startY a y position of the first height value
     *@param endX a x position of the last height value
     *@param endY a y position of the last height value
     *@param xCount the number of columns of height values
     *@param yCount the number of rows of height values
     *@param height a pointer value adrressing xCount * yCount values of heights
     */
        void setHeight(float startX, float startY, float endX, float endY, int xCount, int yCount, float* height);

    /**
     *@brief Create a height map with a set of points
     *@param xCount the number of columns of height values
     *@param yCount the number of rows of height values
     */
        void setHeight(int xCount, int yCount, Vector3* heights);

    /**
     *@brief Define a color map for color shading of heightmap
     */
        void setColorMap(TransferFunction* colorMap);

    /**
     *@brief Get the color map defined for shading of this heightmap
     */
    TransferFunction *getColorMap(void);

    /**
     *@brief Set the visibility of the height map
     */
        void setVisible(bool visible);

    /**
     *@brief Return the status of the visibility
     */
        bool isVisible() const;

    /**
     *@brief Set the visibility of the line contour
     */
        void setLineContourVisible(bool visible);

    /**
     *@brief Defind the color of the line contour
     */
    void setLineContourColor(float *rgb);

    double range_min(void);
    double range_max(void);
};

inline void HeightMap::setVisible(bool visible)
{
        _visible = visible;
}

inline bool HeightMap::isVisible() const
{
        return _visible;
}

inline void HeightMap::setLineContourVisible(bool visible)
{
        _contourVisible = visible;
}

inline void HeightMap::setLineContourColor(float rgb[])
{
    _contourColor.x = rgb[0];
    _contourColor.y = rgb[1];
    _contourColor.z = rgb[2];
}

inline TransferFunction *
HeightMap::getColorMap()
{
    return _colorMap;
}

inline double
HeightMap::range_min()
{
    return _vmin;
}

inline double
HeightMap::range_max()
{
    return _vmax;
}
#endif