GLESTriangleFans.h

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/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */
 
#ifndef META_OCEAN_RENDERING_GLES_TRIANGLE_FANS_H
#define META_OCEAN_RENDERING_GLES_TRIANGLE_FANS_H
 
#include "ocean/rendering/glescenegraph/GLESceneGraph.h"
#include "ocean/rendering/glescenegraph/GLESStripPrimitive.h"
 
#include "ocean/rendering/TriangleFans.h"
 
namespace Ocean
{
 
namespace Rendering
{
 
namespace GLESceneGraph
{
 
/**
 * This class implements a GLESceneGraph triangle fans object.
 * @ingroup renderinggles
 */
class OCEAN_RENDERING_GLES_EXPORT GLESTriangleFans :
    virtual public GLESStripPrimitive,
    virtual public TriangleFans
{
    friend class GLESFactory;
 
    protected:
 
        /**
         * Definition of a pair holding a vertex buffer object and the number of indices.
         */
        typedef std::pair<GLuint, unsigned int> VertexBufferPair;
 
        /**
         * Definition of a vector holding vertex buffer objects.
         */
        typedef std::vector<VertexBufferPair> VertexBufferPairs;
 
    public:
 
        /**
         * Returns the strips of this primitive object.
         * @see StripPrimitive::strips().
         */
        VertexIndexGroups strips() const override;
 
        /**
         * Returns the number of triangle strips defined in this primitive.
         * @see StripPrimitive::numberStrips().
         */
        unsigned int numberStrips() const override;
 
        /**
         * Sets the strips of this primitive object.
         * @see StripPtrimitive::setStrips().
         */
        void setStrips(const VertexIndexGroups& strips) override;
 
        /**
         * Renders the triangles defined by the associated vertex set and the defined triangle faces.
         * @see Renderable::render().
         */
        void render(const GLESFramebuffer& framebuffer, const SquareMatrix4& projectionMatrix, const HomogenousMatrix4& camera_T_object, const HomogenousMatrix4& camera_T_world, const SquareMatrix3& normalMatrix, GLESAttributeSet& attributeSet, const Lights& lights) override;
 
        /**
         * Renders the triangles defined by the associated vertex set and the defined triangle faces.
         * @see Renderable::render().
         */
        void render(const SquareMatrix4& projectionMatrix, const HomogenousMatrix4& camera_T_object, const HomogenousMatrix4& camera_T_world, const SquareMatrix3& normalMatrix, GLESShaderProgram& shaderProgram) override;
 
    protected:
 
        /**
         * Creates a new GLESceneGraph triangle fans object.
         */
        GLESTriangleFans();
 
        /**
         * Destructs a GLESceneGraph triangle fans object.
         */
        ~GLESTriangleFans() override;
 
        /**
         * Releases the internal vertex buffer object containing the triangle strips indices.
         */
        void release();
 
        /**
         * Updates the bounding box of this primitive.
         * @see GLESPrimitive::updateBoundingBox().
         */
        void updateBoundingBox() override;
 
    protected:
 
        /// Vertex buffer pairs holding the indices of the fans.
        VertexBufferPairs vertexBufferPairs_;
 
        /// The strips of the fans.
        VertexIndexGroups strips_;
};
 
}
 
}
 
}
 
#endif // META_OCEAN_RENDERING_GLES_TRIANGLE_FANS_H