Heightfield.h

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//
//  Heightfield.h
//  GlobeEngine
//
//  Created by Mathias Thöny on 27.12.11.
//  Copyright (c) 2011 University of Zurich. All rights reserved.
//

#ifndef GlobeEngine_Heightfield_h
#define GlobeEngine_Heightfield_h

#include <string>
#include "OpenGL_Includes.h"
#include "DrawableComponent.h"
#include "VBOVertex.h"
#include "ColorisationTable.h"

namespace geData {
    class Heightfield : public ge::DrawableComponent
    {
    public:
        Heightfield() {clear(); }
        ~Heightfield() {destroy(); }
        
        void clear();
        void destroy();
        void create();
        void create(int _verticesPerRow, int _verticesPerColumn, float _distBetweenVertices, float* &_heights);
        void create(int _verticesPerRow, int _verticesPerColumn, float _distBetweenVertices, float* &_heights, ColorisationTable* _colortable);
        
    public:
        void draw(std::shared_ptr<ge::Camera> _cam, GLuint _texHandle);
        void update();
        float getMaxHeight();
        float getMinHeight();
        float getMinMaxHeight();
        
    private:
        void createRenderingStructures();
        void createBounds();
        void createVAO();
        void createDiscretizedColorMap(GLfloat* &colorBuffer, int indexInBuffer, int discretizationLevels, vmml::Vector3f* &colors, GLfloat maxValue, GLfloat minValue);
        void assignColorFromMap();
        
    private:
        float rowLength;
        float columnLength;
        int verticesPerRow;
        int verticesPerColumn;
        float dist;
        int trianglesPerRow;
        float alpha;
        int numberOfTriangleStrip;


        int indexCountperStrip;
        
        float* heights;
        float maxHeight;
        float minHeight;
        float diffHeight;
        ge::Vertex3f* vertices;
        ge::Vertex3f* normals;
        GLuint* indices;
        GLfloat* texCoord1D;
        
        GLuint vboVertexObject;
        GLuint vboIndexObject;
        GLuint vboNormalObject;
        GLuint vboTexCoordObject;
        ge::VBOVertex3f* vboVertices;
        ge::VBOVertex3f* vboNormals;
        GLuint* vboIndices;
        bool geometryIsReady;
        // Texture handle
        ColorisationTable* colortable;
        
        
        
    };
}
#endif