initial commit-moved from vulkan_guide

src/scene/vk_loader.h

@@ -0,0 +1,72 @@
+// vulkan_engine.h : Include file for standard system include files,
+// or project specific include files.
+
+#pragma once
+
+#include <core/vk_types.h>
+
+#include "core/vk_descriptors.h"
+#include <unordered_map>
+#include <filesystem>
+
+class VulkanEngine;
+
+struct Bounds
+{
+    glm::vec3 origin;
+    float sphereRadius;
+    glm::vec3 extents;
+};
+
+struct GLTFMaterial
+{
+    MaterialInstance data;
+};
+
+struct GeoSurface
+{
+    uint32_t startIndex;
+    uint32_t count;
+    Bounds bounds;
+    std::shared_ptr<GLTFMaterial> material;
+};
+
+struct MeshAsset
+{
+    std::string name;
+
+
+    std::vector<GeoSurface> surfaces;
+    GPUMeshBuffers meshBuffers;
+};
+
+struct LoadedGLTF : public IRenderable
+{
+    // storage for all the data on a given gltf file
+    std::unordered_map<std::string, std::shared_ptr<MeshAsset> > meshes;
+    std::unordered_map<std::string, std::shared_ptr<Node> > nodes;
+    std::unordered_map<std::string, AllocatedImage> images;
+    std::unordered_map<std::string, std::shared_ptr<GLTFMaterial> > materials;
+
+    // nodes that dont have a parent, for iterating through the file in tree order
+    std::vector<std::shared_ptr<Node> > topNodes;
+
+    std::vector<VkSampler> samplers;
+
+    DescriptorAllocatorGrowable descriptorPool;
+
+    AllocatedBuffer materialDataBuffer;
+
+    VulkanEngine *creator;
+
+    ~LoadedGLTF() { clearAll(); };
+
+    void clearMeshes(){ clearAll(); };
+
+    virtual void Draw(const glm::mat4 &topMatrix, DrawContext &ctx);
+
+private:
+    void clearAll();
+};
+
+std::optional<std::shared_ptr<LoadedGLTF> > loadGltf(VulkanEngine *engine, std::string_view filePath);