source: trunk/packages/vizservers/nanovis/VelocityArrowsSlice.h @ 1522

#pragma once

#include <Cg/cg.h>
#include <Cg/cgGL.h>
#include <vector>

#define USE_NANOVIS_LIB

#ifdef USE_NANOVIS_LIB
#include "Texture2D.h"
#include "Vector3.h"
#else
#include <vr3d/vrTexture2D.h>

typedef vrTexture2D Texture2D;

class Vector3 {
public :
        float x, y, z;
        Vector3() : x(0.0f), y(0.0f), z(0.0f) {}
        Vector3(float x1, float y1, float z1) : x(x1), y(y1), z(z1) {}
        Vector3 operator*(float scale)
        {
                Vector3 vec;
                vec.x = x * scale;
                vec.y = y * scale;
                vec.z = z * scale;
                return vec;
        }
    Vector3 scale(const Vector3& scale)
    {
        Vector3 vec;
        vec.x = x * scale.x;
        vec.y = y * scale.y;
        vec.z = z * scale.z;
            return vec;
    }

        Vector3 operator*(const Vector3& scale)
        {
                Vector3 vec;
                vec.x = x * scale.x;
                vec.y = y * scale.y;
                vec.z = z * scale.z;
                return vec;

        }
        friend Vector3 operator+(const Vector3& value1, const Vector3& value2);

    void set(float x1, float y1, float z1)
    {
        x = x1; y = y1; z = z1;
    }
};

inline Vector3 operator+(const Vector3& value1, const Vector3& value2)
{
        return Vector3(value1.x + value2.x, value1.y + value2.y, value1.z + value2.z);
}

#endif


class VelocityArrowsSlice {
public :
        enum RenderMode {
                LINES,
                GLYPHES,
        };
private :
        unsigned int _vectorFieldGraphicsID;
        float _vfXscale;
        float _vfYscale;
        float _vfZscale;
        float _slicePos;
        int _axis;
        
        unsigned int _fbo;      
    unsigned int _tex;
        
        CGcontext _context;
        CGprogram _queryVelocityFP;
        CGparameter _qvVectorFieldParam;

        int _renderTargetWidth;
        int _renderTargetHeight;
        Vector3* _velocities;
        std::vector<Vector3> _samplingPositions;
        Vector3 _projectionVector;

        int _tickCountForMinSizeAxis;
        int _tickCountX;
        int _tickCountY;
        int _tickCountZ;
        
        int _pointCount;

        Vector3 _maxVelocityScale;
        Vector3 _arrowColor;

        bool _enabled;  
        bool _dirty;
        bool _dirtySamplingPosition;
        bool _dirtyRenderTarget;

        unsigned int _vertexBufferGraphicsID;

        CGprogram _particleVP;
        CGparameter _mvpParticleParam;
        CGparameter _mvParticleParam;
        CGparameter _mvTanHalfFOVParam;
        CGparameter _mvCurrentTimeParam;
        
        CGprogram _particleFP;
        CGparameter _vectorParticleParam;

        Texture2D* _arrowsTex;

        RenderMode _renderMode;
private :
        void createRenderTarget();
        void computeSamplingTicks();
public :
        VelocityArrowsSlice();
        ~VelocityArrowsSlice();

        void vectorField(unsigned int vfGraphicsID, float xScale, float yScale, float zScale);
        void axis(int axis);
        int axis() const;
        void slicePos(float pos);
        float slicePos() const;
        void queryVelocity();
        void render();
    void enabled(bool enabled) {
        _enabled = enabled;
    }
    bool enabled(void) const {
        return _enabled;
    }
    void tickCountForMinSizeAxis(int tickCount);
    int tickCountForMinSizeAxis() const;
    void arrowColor(const Vector3& color);
    void renderMode(RenderMode mode);
    RenderMode renderMode() const;
};

inline int VelocityArrowsSlice::axis() const
{
        return _axis;
}

inline float VelocityArrowsSlice::slicePos() const
{
        return _slicePos;
}


inline int VelocityArrowsSlice::tickCountForMinSizeAxis() const
{
        return _tickCountForMinSizeAxis;
}

inline void VelocityArrowsSlice::arrowColor(const Vector3& color)
{
    _arrowColor = color;
}

inline void VelocityArrowsSlice::renderMode(VelocityArrowsSlice::RenderMode mode)
{
        _renderMode = mode;
        _dirty = true;
}

inline VelocityArrowsSlice::RenderMode VelocityArrowsSlice::renderMode() const
{
        return _renderMode;
}