BasicShapeRenderer.h

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#ifndef BASICSHAPERENDERER_H
#define BASICSHAPERENDERER_H

#include <string>

#include "BasicShape.h"
#include "ShaderIF.h"

typedef void (*FacePrepFcn)(void* caller, int faceIndex);

class BasicShapeRenderer
{
public:
    BasicShapeRenderer(ShaderIF* sIF, BasicShape* shapeIn);

    virtual ~BasicShapeRenderer();

    void getMCBoundingBox(double* xyzLimits) const;

    void renderShape(FacePrepFcn prepareForFace = nullptr, void* caller = nullptr);

    static void setGLSLVariableNames(
        const std::string& mcPositionNameIn, // Must be a GLSL vec3
        const std::string& mcNormalNameIn,   // Must be a GLSL vec3
        const std::string& texCoordsNameIn); // Must be a GLSL vec2

    void setTexCoordsForBlock(int faceIndex,
        float sMin=0.0, float sMax=1.0, float tMin=0.0, float tMax=1.0);

    static void setUseEBOs(bool b) { useEBOs = b; }

private:
    void defineGeometry();

    ShaderIF* shaderIF;
    BasicShape* theShape;
    GLuint vao, vertexBuffer, normalBuffer, textureCoordBuffer, *ebo;
    GLuint texCoordBufferForBlock;
    int nEBOs;

    static std::string mcPositionName; // Default: "mcPosition"
    static std::string mcNormalName;   // Default: "mcNormal"
    static std::string texCoordsName;  // Default: "texCoords"
    // Use element buffer instead of local index arrays?
    static bool useEBOs;

    // To support setTexCoordsForBlock:
    static float texCoordsForBlock[8][2];
};

#endif