InstancedSolidTorus.h

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/* Copyright (c) 2012-2017, ARM Limited and Contributors
 *
 * SPDX-License-Identifier: MIT
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 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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#ifndef INSTANCED_SOLID_TORUS_H
#define INSTANCED_SOLID_TORUS_H

#include "Torus.h"

class InstancedSolidTorus : public Torus
{
private:
    static const unsigned int patchDimension = 4;
    static const unsigned int controlPointsInPatchCount = patchDimension * patchDimension;
    static const unsigned int quadsInPatchCount = (patchDimension - 1) * (patchDimension - 1);
    static const unsigned int controlPointsIndicesCount = controlPointsInPatchCount * torusVerticesCount / quadsInPatchCount;
    static const unsigned int patchInstancesCount = controlPointsIndicesCount / controlPointsInPatchCount;
    static const unsigned int patchDensity = 16;
    static const unsigned int patchVerticesCount = patchDensity * patchDensity;
    static const unsigned int patchComponentsCount = patchVerticesCount * 2;
    static const unsigned int patchTriangleIndicesCount = (patchDensity - 1) * (patchDensity - 1) * 6;

    GLuint controlIndicesBufferID;
    GLuint controlVerticesBufferID;
    GLuint patchIndicesBufferID;
    GLuint patchVertexBufferID;

    bool initializeControlUniformBuffers(void);

    bool initializeVertexAttribs(void);

    void setLightParameters(void);

public:

    InstancedSolidTorus(float torusRadius, float circleRadius);

    ~InstancedSolidTorus(void);

    void draw(float* rotationVector);
};

#endif /* INSTANCED_SOLID_TORUS_H. */