RetiredTrianglesRenderer.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_TRACKING_MAPTEXTURING_RETIRED_TRIANGLES_RENDERER_H
#define META_OCEAN_TRACKING_MAPTEXTURING_RETIRED_TRIANGLES_RENDERER_H
 
#include "ocean/tracking/maptexturing/MapTexturing.h"
 
#include "ocean/base/Frame.h"
 
#include "ocean/math/HomogenousMatrix4.h"
 
#include "ocean/rendering/Engine.h"
#include "ocean/rendering/ShaderProgram.h"
#include "ocean/rendering/TextureFramebuffer.h"
#include "ocean/rendering/Triangles.h"
#include "ocean/rendering/VertexSet.h"
 
namespace Ocean
{
 
namespace Tracking
{
 
namespace MapTexturing
{
 
/**
 * This class implements a renderer for retired triangle allowing to determine whether they can be deleted.
 * @ingroup trackingmaptexturing
 */
class OCEAN_TRACKING_MAPTEXTURING_EXPORT RetiredTrianglesRenderer
{
    public:
 
        /**
         * Destructs this renderer and releases all resources.
         */
        ~RetiredTrianglesRenderer();
 
        /**
         * Renders all retired triangles to determine whether they can be deleted.
         * @param engine The rendering engine to be used
         * @param vertexSet The vertex set containing all triangle vertices, must be valid
         * @param triangles The triangles to render, must be valid
         * @param numberTriangles The number of triangles to render, with range [1, infinity)
         * @param projectionMatrix The projection matrix to be used, must be valid
         * @param world_T_camera The transformation between camera and world, must be valid
         * @param trianglesStateFramebuffer The framebuffer holding the states of the individual triangles, must be valid
         * @param downsampledDepthFramebuffer The down-sampled and filtered texture framebuffer holding the depth image, must be valid
         * @param nearDistance The view's near distance, with range (0, infinity)
         * @param farDistance the view's far distance, with range (nearDistance, infinity)
         * @param deletedTriangleIds The resulting ids of all triangles which's states have changed from retired to deleted
         * @return True, if succeeded
         */
        bool render(const Rendering::Engine& engine, const Rendering::VertexSetRef& vertexSet, const Rendering::TrianglesRef& triangles, const unsigned int numberTriangles, const SquareMatrix4& projectionMatrix, const HomogenousMatrix4& world_T_camera, const Rendering::TextureFramebufferRef& trianglesStateFramebuffer, const Rendering::TextureFramebufferRef& downsampledDepthFramebuffer, const Scalar nearDistance, const Scalar farDistance, Indices32& deletedTriangleIds);
 
        /**
         * Returns the current texture framebuffer of this renderer.
         * @return The renderer's texture framebuffer
         */
        inline const Rendering::TextureFramebufferRef& textureFramebuffer() const;
 
        /**
         * Explicitly releases this renderer and releases all resources.
         */
        void release();
 
        /**
         * Returns whether this renderer has been initialized successfully.
         * @return True, if succeeded
         */
        inline bool isValid() const;
 
    protected:
 
        /// The shader program to render the retired triangles.
        Rendering::ShaderProgramRef shaderProgramRetiredTriangles_;
 
        /// The texture framebuffer in which the triangles will be rendered.
        Rendering::TextureFramebufferRef textureFramebuffer_;
 
        /// The intermediate state frame.
        Frame stateFrame_;
 
        /// The platform-specific shader part.
        static const char* partPlatform_;
 
        /// The vertex shader part.
        static const char* programVertexShaderRetiredTriangles_;
 
        /// The fragment shader part.
        static const char* programFragmentShaderRetiredTriangles_;
};
 
inline const Rendering::TextureFramebufferRef& RetiredTrianglesRenderer::textureFramebuffer() const
{
    return textureFramebuffer_;
}
 
}
 
}
 
}
 
#endif // META_OCEAN_TRACKING_MAPTEXTURING_RETIRED_TRIANGLES_RENDERER_H