#aiscene
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zyntaks.ca
Cleaned up the loading into something that actually makes sense, instead of a bunch of crap in main(). :D
ProcessedSceneData ProcessScene() { const struct aiScene *scene = aiImportFile("../models/cube.fbx", aiProcess_Triangulate | aiProcess_OptimizeMeshes | aiProcess_GlobalScale | aiProcess_ImproveCacheLocality | aiProcess_ValidateDataStructure | aiProcess_FindInstances | aiProcess_FlipUVs | aiProcess_RemoveRedundantMaterials); const auto models = model_set_Build(scene->mMeshes, scene->mNumMeshes); const auto nodes = FlattenSceneToNodeList(scene); const auto draw_entries = BuildDrawEntries(&nodes, &models); const auto materials = BuildMaterialsFromScene(scene); const auto colliders = BuildCollisionTriangles(&nodes, scene); const auto gpu_mesh = GPUMesh_Build(models); const auto sphere_info = GetSphereInfo(&nodes); ArrayList_SceneNode_Destroy(&nodes); model_set_Destroy(&models); aiReleaseImport(scene); return (ProcessedSceneData){ .draw_entries = draw_entries, .materials = materials, .colliders = colliders, .gpu_mesh = gpu_mesh, .sphere_info = sphere_info, }; }
April 22, 2025 at 2:20 PM
zyntaks.ca
The process of loading a static scene in my little WIP engine so far...

1) Let Assimp do all the hard work.
2) Who needs multiple VAOs and buffers? Slap everything in a single VAO+VBO+EBO.
3) Scene "hierarchy"? Embrace scene anarchy! Build a big, flat 'draw list' instead.
unsigned lightmap_texture = texture_set_Load("../models/Lightmap.png"); ArrayList materials = arraylist_Build(sizeof(Material)); ArrayList draw_entries = arraylist_Build(sizeof(DrawEntry)); const struct aiScene *scene = aiImportFile("../models/cube.fbx", aiProcess_Triangulate | aiProcess_OptimizeMeshes | // aiProcess_OptimizeGraph | - breaks custom properties :( aiProcess_GlobalScale | aiProcess_ImproveCacheLocality | aiProcess_ValidateDataStructure | aiProcess_FindInstances | aiProcess_FlipUVs | aiProcess_RemoveRedundantMaterials); // Process all meshes into a single binary blob. const ModelSet models = model_set_Build(scene->mMeshes, scene->mNumMeshes); BuildMaterialsFromScene(whiteTexture, scene, &materials); // List of all meshes to be drawn and their world-space transforms. BuildDrawEntriesFromScene(scene, &draw_entries, &models); aiReleaseImport(scene); // Done with the scene file! // Copy that binary blob to various GPU buffers. const GPUMesh gpu_mesh = UploadMeshesToGPU(models); // Done with model set since we've copied all info to gpu and the draw list. model_set_Destroy(&models);
April 20, 2025 at 2:24 AM