GLESPoints.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_POINTS_H
#define META_OCEAN_RENDERING_GLES_POINTS_H
 
#include "ocean/rendering/glescenegraph/GLESceneGraph.h"
#include "ocean/rendering/glescenegraph/GLESIndependentPrimitive.h"
 
#include "ocean/rendering/Points.h"
 
namespace Ocean
{
 
namespace Rendering
{
 
namespace GLESceneGraph
{
 
/**
 * This class implements a GLESceneGraph points object.
 * @ingroup renderinggles
 */
class OCEAN_RENDERING_GLES_EXPORT GLESPoints :
    virtual public GLESIndependentPrimitive,
    virtual public Points
{
    friend class GLESFactory;
 
    public:
 
        /**
         * Returns the indices of the used vertex points.
         * @see Points::indices().
         */
        VertexIndices indices() const override;
 
        /**
         * Returns the number of point indices defined in this primitive.
         * @see Points::numberIndices().
         */
        unsigned int numberIndices() const override;
 
        /**
         * Returns the size in pixels at which all points will be rendered.
         * @see Points::pointSize().
         */
        Scalar pointSize() const override;
 
        /**
         * Sets the indices of the used vertex points.
         * @see Points::setIndices().
         */
        void setIndices(const VertexIndices& indices) override;
 
        /**
         * Sets the indices of the used vertex points.
         * @see Points::setIndices().
         */
        void setIndices(const unsigned int numberImplicitPoints) override;
 
        /**
         * Sets the size in pixels at which all points will be rendered.
         * @see Points::setPointSize().
         */
        void setPointSize(const Scalar size) override;
 
        /**
         * Renders the points defined by the associated vertex set and the defined indices.
         * @see GLESRenderable::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;
 
        /**
         * Draws all points with the currently bound shader program.
         */
        void drawPoints();
 
    protected:
 
        /**
         * Creates a new GLESceneGraph points object.
         */
        GLESPoints();
 
        /**
         * Destructs a GLESceneGraph points object.
         */
        ~GLESPoints() override;
 
        /**
         * Releases the internal vertex buffer object containing the point indices.
         */
        void release();
 
        /**
         * Updates the bounding box of this primitive.
         * @see GLESPrimitive::updateBoundingBox().
         */
        void updateBoundingBox() override;
 
    protected:
 
        /// Vertex buffer object for point indices.
        GLuint vboIndices_ = 0u;
 
        /// The point indices, in case points are defined via explicit point indices.
        VertexIndices explicitPointIndices_;
 
        /// Number of points, in case points are defined implicitly based on points with consecutive indices.
        unsigned int numberImplicitPoints_ = 0u;
 
        /// The size of all points (the diameter), in pixels, with range (0, infinity).
        Scalar pointSize_ = Scalar(1);
};
 
}
 
}
 
}
 
#endif // META_OCEAN_RENDERING_GLES_POINTS_H