MeshRenderer.h

Go to the documentation of this file.

/*
 * 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_MESH_RENDERER_H
#define META_OCEAN_TRACKING_MAPTEXTURING_MESH_RENDERER_H
 
#include "ocean/tracking/maptexturing/MapTexturing.h"
#include "ocean/tracking/maptexturing/HashableTriangle.h"
#include "ocean/tracking/maptexturing/TextureAtlas.h"
 
#include "ocean/base/Frame.h"
 
#include "ocean/math/HomogenousMatrix4.h"
 
#include "ocean/rendering/FrameTexture2D.h"
#include "ocean/rendering/Engine.h"
#include "ocean/rendering/ShaderProgram.h"
#include "ocean/rendering/TextureFramebuffer.h"
#include "ocean/rendering/TriangleFace.h"
#include "ocean/rendering/Triangles.h"
#include "ocean/rendering/VertexSet.h"
 
namespace Ocean
{
 
namespace Tracking
{
 
namespace MapTexturing
{
 
/**
 * This class implements a renderer for the entire mesh.
 * @ingroup trackingmaptexturing
 */
class OCEAN_TRACKING_MAPTEXTURING_EXPORT MeshRenderer
{
    protected:
 
        /**
         * Definition of an unordered map mapping mesh ids to texture framebuffers.
         */
        typedef std::unordered_map<Index32, Rendering::TextureFramebufferRef> TextureFramebufferMap;
 
    public:
 
        /**
         * Destructs this renderer and releases all resources.
         */
        ~MeshRenderer();
 
        /**
         * Initializes this renderer.
         * @param engine The rendering engine to be used
         * @return True, if succeeded
         */
        bool initialize(const Rendering::Engine& engine);
 
        /**
         * Renders textured triangles into a texture atlas.
         * @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 [0, infinity)
         * @param anyCamera The camera profile to be used when rendering, must be valid
         * @param world_T_camera The transformation between camera and world, must be valid
         * @param textureFramebufferMap The map of mesh ID to texture, used for rendering associated triangles with the textures.
         * @param trianglesStateFramebuffer The framebuffer holding the states of the individual triangles, must be valid
         * @param textureAtlas The texture atlas defining the layout
         * @param renderedFrame The optionally resulting frame to which the rendered frame is copied, will be ignored if set to `nullptr`.
         * @return True, if succeeded
         */
        bool render(const Rendering::Engine& engine, const Rendering::VertexSetRef& vertexSet, const Rendering::TrianglesRef& triangles, const unsigned int numberTriangles, const AnyCamera& anyCamera, const HomogenousMatrix4& world_T_camera, const TextureFramebufferMap& textureFramebufferMap, const Rendering::TextureFramebufferRef& trianglesStateFramebuffer, const TextureAtlas& textureAtlas, Frame* renderedFrame = nullptr);
 
        /**
         * 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 rendering individual triangles with individual color ids.
        Rendering::ShaderProgramRef shaderProgram_;
 
        /// The texture framebuffer holding the states of the individual triangles.
        Rendering::TextureFramebufferRef textureFramebuffer_;
 
        /// The platform-specific shader part.
        static const char* partPlatform_;
 
        /// The shader part for the texture atlas.
        static const char* partTextureAtlas_;
 
        /// The vertex shader part.
        static const char* programVertexShader_;
 
        /// The fragment shader part.
        static const char* programFragmentShader_;
};
 
inline const Rendering::TextureFramebufferRef& MeshRenderer::textureFramebuffer() const
{
    return textureFramebuffer_;
}
 
}
 
}
 
}
 
#endif // META_OCEAN_TRACKING_MAPTEXTURING_MESH_RENDERER_H