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15 | 15 | */ |
16 | 16 |
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17 | 17 | #include "GLTFViewer.h" |
| 18 | + |
| 19 | +#include <filamentapp/Config.h> |
| 20 | +#include <filamentapp/FilamentApp.h> |
| 21 | +#include <filamentapp/IBL.h> |
| 22 | + |
| 23 | +#include <filament/Camera.h> |
| 24 | +#include <filament/Engine.h> |
| 25 | +#include <filament/IndexBuffer.h> |
| 26 | +#include <filament/Material.h> |
| 27 | +#include <filament/MaterialInstance.h> |
| 28 | +#include <filament/RenderableManager.h> |
| 29 | +#include <filament/Scene.h> |
| 30 | +#include <filament/Skybox.h> |
| 31 | +#include <filament/TransformManager.h> |
| 32 | +#include <filament/VertexBuffer.h> |
| 33 | +#include <filament/View.h> |
| 34 | + |
| 35 | +#include <utils/EntityManager.h> |
| 36 | +#include <utils/NameComponentManager.h> |
| 37 | + |
| 38 | +#include <gltfio/TextureProvider.h> |
| 39 | + |
| 40 | +//#include "generated/resources/gltf.h" |
| 41 | +#include "materials/uberarchive.h" |
| 42 | + |
| 43 | +#include <iostream> |
| 44 | +#include <fstream> |
| 45 | + |
| 46 | +using namespace filament; |
| 47 | +using utils::Entity; |
| 48 | +using utils::EntityManager; |
| 49 | + |
| 50 | + |
| 51 | +void GLTFViewer::runApp(std::function<void(filament::Engine*, filament::View*, filament::Scene*, |
| 52 | + filament::Renderer*)> postRender) { |
| 53 | + FilamentApp::get().animate( |
| 54 | + [this](Engine* engine, View* view, double now) { animate(engine, view, now); }); |
| 55 | + |
| 56 | + // TODO: Remove |
| 57 | + mApp.config.backend = filament::Engine::Backend::METAL; |
| 58 | + |
| 59 | + FilamentApp::get().run( |
| 60 | + mApp.config, |
| 61 | + [this](Engine* engine, View* view, Scene* scene) { setup(engine, view, scene); }, |
| 62 | + [this](Engine* engine, View* view, Scene* scene) { cleanup(engine, view, scene); }, |
| 63 | + FilamentApp::ImGuiCallback(), FilamentApp::PreRenderCallback(), std::move(postRender)); |
| 64 | +} |
| 65 | + |
| 66 | +void GLTFViewer::setup(Engine* engine, filament::View* view, filament::Scene* scene) { |
| 67 | + if (mApp.enableMSAA) { |
| 68 | + // TODO Investigate why |
| 69 | + // Enabling MSAA fixes the "transmission" sample but breaks the others |
| 70 | + view->setMultiSampleAntiAliasingOptions({ .enabled = true}); |
| 71 | + } |
| 72 | + mApp.engine = engine; |
| 73 | + mApp.names = new utils::NameComponentManager(EntityManager::get()); |
| 74 | + mApp.viewer = new viewer::ViewerGui(engine, scene, view); |
| 75 | + |
| 76 | + // TODO: Support JIT |
| 77 | + mApp.materials = //(mApp.materialSource == JITSHADER) |
| 78 | + //? createJitShaderProvider(engine, false /* optimize */, |
| 79 | + // samples::getJitMaterialVariantFilter(mApp.config.backend)) |
| 80 | + //: |
| 81 | + filament::gltfio::createUbershaderProvider(engine, UBERARCHIVE_DEFAULT_DATA, |
| 82 | + UBERARCHIVE_DEFAULT_SIZE); |
| 83 | + |
| 84 | + mApp.loader = gltfio::AssetLoader::create({ engine, mApp.materials, mApp.names }); |
| 85 | + |
| 86 | + loadAsset(mFilename); |
| 87 | + loadResources(mFilename); |
| 88 | + mApp.viewer->setAsset(mApp.asset, mApp.instance); |
| 89 | +} |
| 90 | + |
| 91 | +void GLTFViewer::cleanup(Engine* engine, filament::View* view, filament::Scene* scene) { |
| 92 | + mApp.loader->destroyAsset(mApp.asset); |
| 93 | + mApp.materials->destroyMaterials(); |
| 94 | + |
| 95 | + delete mApp.materials; |
| 96 | + delete mApp.names; |
| 97 | + delete mApp.viewer; |
| 98 | + delete mApp.resourceLoader; |
| 99 | + delete mApp.stbDecoder; |
| 100 | + delete mApp.ktxDecoder; |
| 101 | + |
| 102 | + gltfio::AssetLoader::destroy(&mApp.loader); |
| 103 | +} |
| 104 | + |
| 105 | +void GLTFViewer::animate(filament::Engine* engine, filament::View* view, double now) { |
| 106 | + mApp.resourceLoader->asyncUpdateLoad(); |
| 107 | + |
| 108 | + mApp.viewer->updateRootTransform(); |
| 109 | + mApp.viewer->populateScene(); |
| 110 | + |
| 111 | + mApp.viewer->applyAnimation(now, mApp.instance); |
| 112 | +} |
| 113 | + |
| 114 | +void GLTFViewer::setFilename(std::string filename) { |
| 115 | + mFilename = std::move(filename); |
| 116 | +} |
| 117 | + |
| 118 | +static std::ifstream::pos_type getFileSize(const char* filename) { |
| 119 | + std::ifstream in(filename, std::ifstream::ate | std::ifstream::binary); |
| 120 | + return in.tellg(); |
| 121 | +} |
| 122 | + |
| 123 | +void GLTFViewer::loadAsset(utils::Path filename) { |
| 124 | + // Peek at the file size to allow pre-allocation. |
| 125 | + long contentSize = static_cast<long>(getFileSize(filename.c_str())); |
| 126 | + if (contentSize <= 0) { |
| 127 | + std::cerr << "Unable to open " << filename << std::endl; |
| 128 | + exit(1); |
| 129 | + } |
| 130 | + |
| 131 | + // Consume the glTF file. |
| 132 | + std::ifstream in(filename.c_str(), std::ifstream::binary | std::ifstream::in); |
| 133 | + std::vector<uint8_t> buffer(static_cast<unsigned long>(contentSize)); |
| 134 | + if (!in.read((char*) buffer.data(), contentSize)) { |
| 135 | + std::cerr << "Unable to read " << filename << std::endl; |
| 136 | + exit(1); |
| 137 | + } |
| 138 | + |
| 139 | + // Parse the glTF file and create Filament entities. |
| 140 | + mApp.asset = mApp.loader->createInstancedAsset(buffer.data(), buffer.size(), |
| 141 | + &(mApp.instance), 1); |
| 142 | + buffer.clear(); |
| 143 | + buffer.shrink_to_fit(); |
| 144 | + |
| 145 | + if (!mApp.asset) { |
| 146 | + std::cerr << "Unable to parse " << filename << std::endl; |
| 147 | + exit(1); |
| 148 | + } |
| 149 | +} |
| 150 | + |
| 151 | +void GLTFViewer::loadResources(utils::Path filename) { |
| 152 | + // Load external textures and buffers. |
| 153 | + std::string gltfPath = filename.getAbsolutePath(); |
| 154 | + gltfio::ResourceConfiguration configuration; |
| 155 | + configuration.engine = mApp.engine; |
| 156 | + configuration.gltfPath = gltfPath.c_str(); |
| 157 | + configuration.normalizeSkinningWeights = true; |
| 158 | + if (!mApp.resourceLoader) { |
| 159 | + mApp.resourceLoader = new gltfio::ResourceLoader(configuration); |
| 160 | + mApp.stbDecoder = gltfio::createStbProvider(mApp.engine); |
| 161 | + mApp.ktxDecoder = gltfio::createKtx2Provider(mApp.engine); |
| 162 | + mApp.resourceLoader->addTextureProvider("image/png", mApp.stbDecoder); |
| 163 | + mApp.resourceLoader->addTextureProvider("image/jpeg", mApp.stbDecoder); |
| 164 | + mApp.resourceLoader->addTextureProvider("image/ktx2", mApp.ktxDecoder); |
| 165 | + } |
| 166 | + |
| 167 | + if (!mApp.resourceLoader->asyncBeginLoad(mApp.asset)) { |
| 168 | + std::cerr << "Unable to start loading resources for " << filename << std::endl; |
| 169 | + exit(1); |
| 170 | + } |
| 171 | + |
| 172 | + auto ibl = FilamentApp::get().getIBL(); |
| 173 | + if (ibl) { |
| 174 | + mApp.viewer->setIndirectLight(ibl->getIndirectLight(), ibl->getSphericalHarmonics()); |
| 175 | + } |
| 176 | +} |
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