Editing the modelimporter to allow to create scene graphs

.vscode/settings.json

@@ -1,6 +0,0 @@
-{
-    "cmake.configureOnOpen": true,
-    "files.associations": {
-        "iosfwd": "cpp"
-    }
-}

BarinkEngine/Include/AssetManager/ModelImporter.h

@@ -10,17 +10,20 @@
 #include <assimp/postprocess.h> 
 #include <string>
 
+void ProcessVertices(aiMesh* mesh, std::vector<BarinkEngine::Vertex>& out_vertices);
+void ProcessIndices(aiMesh* mesh, std::vector<unsigned int>& out_indices);
+
+
 class ModelImporter {
+
+public:
+	std::vector<BarinkEngine::Mesh> Import(const std::string path);
+	
 private:
-	void ImportFBX(std::string path); 
-	void ImportBlend(std::string path);
-	void ImportGLTF(std::string path);
-	void ImportOBJ(std::string path);
+
 	static BarinkEngine::Mesh ModelImporter::processMesh(aiMesh* mesh, const aiScene* scene);
 	static std::vector<BarinkEngine::Mesh> ModelImporter::processNode(aiNode* node, const aiScene* scene);
 	
-public:
-	void Import(std::string path);
 
-	static std::vector<BarinkEngine::Mesh> Test();
+
 };

BarinkEngine/Include/Graphics/Buffer.h

@@ -1,6 +1,6 @@
 #pragma once
 #include <glad/glad.h>
-class Buffer {
+class GpuBuffer {
 private:
 	unsigned int id;
 public:

BarinkEngine/Include/Graphics/Mesh.h

@@ -1,10 +1,11 @@
 #pragma once
 #include <vector>
 #include <glm/glm.hpp>
+#include "VertexArray.h"
+#include "Buffer.h"
 
 namespace BarinkEngine{
 
-
 	struct Vertex {
 		glm::vec3 vertices;
 		glm::vec2 uv;
@@ -13,8 +14,13 @@ namespace BarinkEngine{
 	class Mesh {
 	public:
 		std::vector<Vertex> vertices;
-		std::vector<unsigned int > elements;
+		std::vector<unsigned int> elements;
 	
+	private:
+		GpuBuffer vertexBuffer;
+		GpuBuffer elementBuffer;
+		VertexArray VAO;
+		unsigned int UV_id;
 	};
 
 }

BarinkEngine/Include/Graphics/RenderSurface.h

@@ -20,8 +20,8 @@ private:
 	std::vector<unsigned int > indices;
 
 
-	Buffer vertexBuffer;
-	Buffer elementBuffer;
+	GpuBuffer vertexBuffer;
+	GpuBuffer elementBuffer;
 
 	VertexArray VAO;
 

BarinkEngine/Include/Graphics/Renderable.h

@@ -1,37 +1,23 @@
 #pragma once
 #include <vector>
 #include "Mesh.h"
-#include "Buffer.h"
+
 #include "Material.h"
 #include "Texture.h"
-#include "VertexArray.h"
+
 #include "Scene.h"
 
+namespace BarinkEngine {
 
-class Renderable  : public SceneNode {
-public:
-	/*
-	* NOTE: Should combine into a Mesh!!
-	*/
-	Buffer vertexBuffer;
-	Buffer elementBuffer;
-	//Buffer uv;
-	VertexArray VAO;
-
-
-	GLuint UV_id;
+	class Renderable {
+	public:
+		Mesh mesh;
 		Material* material;
 		Texture* texture;
 
-	
 		Shader* shader;
 
-	~Renderable();
-
-	static Renderable* Load();
-	void Draw();
-
-private:
-	std::vector<BarinkEngine::Mesh> meshes;
 		Renderable();
-};
+		~Renderable();
+	};
+}

BarinkEngine/Include/Graphics/Transform.h

@@ -0,0 +1,11 @@
+#pragma once
+#include <glm/glm.hpp>
+struct Transform {
+	glm::vec3 Position;
+	glm::vec3 Rotation;
+	glm::vec3 Scale;
+
+	glm::mat4 ModelMatrix;
+};
+
+

BarinkEngine/Include/Scene.h

@@ -2,46 +2,22 @@
 #include <string>
 #include <vector>
 
-#include "glm/glm.hpp"
-
+#include "Graphics/Transform.h"
+#include "Scene/Node.h"
 /*
 *	Scene should be a description of a game world 
 */
-
-struct Transform {
-	glm::vec3 Position;
-	glm::vec3 Rotation;
-	glm::vec3 Scale;
-
-	glm::mat4 ModelMatrix;
-};
-
-
-class SceneNode {
-public: 
-	std::string name;
-	Transform transform;
-	SceneNode* parent;
-	std::vector<SceneNode*> children;
-
-
-	void addChild(SceneNode& node);
-
-};
-
-
 class Scene {
 
 public:
-	SceneNode& GetSceneNode(std::string);
-	SceneNode& GetRoot();
+	Node& GetSceneNode(std::string);
+	Node& GetRoot();
 
 	Scene(std::string SceneName = "Default Scene");
 	~Scene();
 
-
 private:
-	SceneNode* root;
+	Node* root;
 		
 };
 

BarinkEngine/Include/Scene/Node.h

@@ -0,0 +1,21 @@
+#pragma once
+#include <string>
+#include <vector>
+#include "Graphics/Transform.h"
+
+class Node {
+	public:
+		std::string& name;
+		Node* parent;
+		std::vector<Node*> children;
+
+		void addChild(Node& node);
+
+};
+
+
+
+class Group : Node {
+	Transform& transform;
+
+};

BarinkEngine/Include/Scene/SceneBuilder.h

@@ -0,0 +1,14 @@
+#pragma once
+#include "Graphics/Renderable.h"
+#include "Scene/SceneNodeTypes.h"
+
+#include <glm/glm.hpp>
+/*
+* Define a helper class to more easily build a proper scene 
+*/
+static class SceneBuilder {
+
+	static Group* AddGroup(std::string name);
+	static SceneObject* AddVisual(std::string name, Renderable& object, glm::vec3 position );
+
+};

BarinkEngine/Include/Scene/SceneManager.h

@@ -0,0 +1,15 @@
+#pragma once
+#include <string>
+#include <map>
+#include "Scene.h"
+static class SceneManager {
+
+public:
+	static Scene* CreateScene();
+	static Scene& GetScene(std::string name);
+
+
+private:
+	static std::map<std::string , Scene*> 
+
+};

BarinkEngine/Include/Scene/SceneNodeTypes.h

@@ -0,0 +1,21 @@
+#pragma once
+#include "Graphics/Camera.h"
+#include "Graphics/Renderable.h"
+#include "Scene/Node.h"
+
+class SceneCamera : Group 
+{
+	Camera& camera;
+	 
+
+};
+
+
+class SceneObject : Group
+{
+	Renderable& renderable;
+
+
+
+};
+

BarinkEngine/Scene.cpp

@@ -1,12 +1,28 @@
 #include "Scene.h"
+void DeleteSubGraph(Node* tree);
+
+Scene::Scene(std::string sceneName)
+{
+	// Create a root node
+	root = new Node();
+	root->name = sceneName;
+
+}
+
+Scene::~Scene()
+{
+	// Delete all nodes in the graph.
+	DeleteSubGraph(root);
+
+}
 
 
-SceneNode* SearchInChildren(SceneNode* root, std::string name ) {
+Node* SearchInChildren(Node* root, std::string name ) {
 	
 	if (root->name == name)
 		return root;
 
-	SceneNode* found = nullptr;
+	Node* found = nullptr;
 	for (auto child : root->children) {
 		found = SearchInChildren(child, name);
 	}
@@ -14,39 +30,35 @@ SceneNode* SearchInChildren(SceneNode* root, std::string name ) {
 }
 
 
-SceneNode& Scene::GetSceneNode(std::string name)
+Node& Scene::GetSceneNode(std::string name)
 {
 	return *SearchInChildren(root, name);
 }
 
 
 
-SceneNode& Scene::GetRoot()
+Node& Scene::GetRoot()
 {
 	return *root;
 }
 
-Scene::Scene(std::string sceneName)
-{
-	// Create a root node
-	root = new SceneNode();
-	root->name = sceneName;
-	root->transform = Transform();
-
-	root->transform.Position	= glm::vec3(0);
-	root->transform.Rotation	= glm::vec3(0);
-	root->transform.Scale		= glm::vec3(0);
-
-	root->transform.ModelMatrix = glm::mat4(0);
-
-}
-
-Scene::~Scene()
-{	
-	// Destruct scene!
-}
-
-void SceneNode::addChild(SceneNode& node)
+void Node::addChild(Node& node)
 {
 	children.push_back(&node);
 }
+
+
+void DeleteSubGraph(Node* tree)
+{
+	if (tree->children.size() == 0) {
+		delete tree;
+		return;
+	}
+
+	for (auto child : tree->children) {
+		if (child->children.size() > 0) {
+			DeleteSubGraph(child);
+		}
+	}
+
+}

BarinkEngine/graphics/Buffer.cpp

@@ -1,15 +1,15 @@
 #include "Graphics/Buffer.h"
 
 
-int Buffer::getBufferID() {
+int GpuBuffer::getBufferID() {
 	return id;
 }
 
-void Buffer::createBuffer() {
+void GpuBuffer::createBuffer() {
 	glGenBuffers(1, (GLuint*) &id);
 }
 
-void Buffer::setBufferData(void* data, size_t dataSize, bool elementBuffer = false ) {
+void GpuBuffer::setBufferData(void* data, size_t dataSize, bool elementBuffer = false ) {
 	
 	if (elementBuffer) {
 		glBufferData(GL_ELEMENT_ARRAY_BUFFER, dataSize, data, GL_STATIC_DRAW);
@@ -21,7 +21,7 @@ void Buffer::setBufferData(void* data, size_t dataSize, bool elementBuffer = fal
 
 }
 
-void Buffer::Bind(bool elementBuffer = false ) {
+void GpuBuffer::Bind(bool elementBuffer = false ) {
 	if (elementBuffer) {
 		glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, id);
 
@@ -32,7 +32,7 @@ void Buffer::Bind(bool elementBuffer = false ) {
 	}
 }
 
-void Buffer::Unbind(bool elementBuffer = false) {
+void GpuBuffer::Unbind(bool elementBuffer = false) {
 	if (elementBuffer) {
 		glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
 	}
@@ -42,6 +42,6 @@ void Buffer::Unbind(bool elementBuffer = false) {
 	}
 }
 
-void Buffer::Delete() {
+void GpuBuffer::Delete() {
 	glDeleteBuffers(1, (GLuint*) &id);
 }

BarinkEngine/graphics/ModelImporter.cpp

@@ -1,70 +1,21 @@
 #include "AssetManager/ModelImporter.h"
 
 
-void ModelImporter::ImportFBX(std::string path)
+std::vector<BarinkEngine::Mesh> ModelImporter::Import(const std::string path)
 {
-    //spdlog::warn("ImportFBX not implemented!");
-}
-
-void ModelImporter::ImportBlend(std::string path)
-{
-    //spdlog::warn("ImportBlend not implemented!");
-}
-
-void ModelImporter::ImportGLTF(std::string path)
-{
-    //spdlog::warn("ImportGLTF not implemented!");
-}
-
-void ModelImporter::ImportOBJ(std::string path)
-{
-    //spdlog::warn("ImportOBJ not implemented!");
-}
-
-void ModelImporter::Import(std::string path)
-{
-    //spdlog::warn("Import not implemented!");
-}
-
-std::vector<BarinkEngine::Mesh> ModelImporter::Test() {
-   
-    /*
-    spdlog::info("====== Tiny GLTF ======");
-    tinygltf::Model loadedModel;
-    tinygltf::TinyGLTF loader;
-    std::string error;
-    std::string warn;
-    bool ret = loader.LoadASCIIFromFile(&loadedModel, &error, &warn, "./Build/SandboxApplication/Debug/sponza.gltf");
-
-    if (!warn.empty())
-        spdlog::warn("TinyGLTF Warning: {}", warn);
-    if (!error.empty())
-        spdlog::error("TinyGLTF Error: {}", error);
-    if (!ret) {
-        spdlog::error("TinyGLTF Error: Failed to parse glTF");
-        exit(-1);
-    }
-
-    spdlog::info("Meshes in model: {}", loadedModel.meshes.size());
-    spdlog::info("Primitives in mesh: {}", loadedModel.meshes[0].primitives.size());
-
-    */
-    
-   
-    //spdlog::info("======= Assimp ======");
-
     Assimp::Importer importer;
-    const aiScene* scene = importer.ReadFile("build/SandboxApplication/Debug/Models/Cube.obj", aiProcess_Triangulate | aiProcess_FlipUVs);
+    const aiScene* scene = importer.ReadFile(path, aiProcess_Triangulate | aiProcess_FlipUVs);
 
     aiNode* currentNode = scene->mRootNode;
 
     return processNode(currentNode, scene);
-
-
 }
 
-std::vector<BarinkEngine::Mesh> ModelImporter::processNode(aiNode* node, const aiScene* scene) {
+std::vector<BarinkEngine::Mesh> ModelImporter::processNode(aiNode* node, const aiScene* scene) 
+{
+
     std::vector<BarinkEngine::Mesh> meshes;
+
     for (unsigned int i = 0; i < node->mNumMeshes; i++) {
         aiMesh* mesh = scene->mMeshes[node->mMeshes[i]];
         meshes.push_back(processMesh(mesh, scene));
@@ -85,6 +36,20 @@ BarinkEngine::Mesh ModelImporter::processMesh(aiMesh* mesh, const aiScene* scene
     std::vector<unsigned int> indices;
     std::vector<BarinkEngine::Vertex> vertices;
 
+    ProcessVertices(mesh, vertices);
+    
+    ProcessIndices(mesh, indices);
+
+    BarinkEngine::Mesh result;
+    result.vertices = vertices;
+    result.elements = indices;
+
+
+    return result;
+
+}
+
+void ProcessVertices(aiMesh* mesh, std::vector<BarinkEngine::Vertex>& out_vertices) {
     // Process vertices
     for (unsigned int i = 0; i < mesh->mNumVertices; i++) {
         BarinkEngine::Vertex v{};
@@ -106,28 +71,18 @@ BarinkEngine::Mesh ModelImporter::processMesh(aiMesh* mesh, const aiScene* scene
 
         }
 
-        vertices.push_back(v);
+        out_vertices.push_back(v);
     }
+}
 
+void ProcessIndices(aiMesh* mesh, std::vector<unsigned int>& out_indices) {
     // Process Indices
     for (unsigned int i = 0; i < mesh->mNumFaces; i++) {
         aiFace face = mesh->mFaces[i];
         if (face.mNumIndices < 3)
             continue;
         for (unsigned int j = 0; j < face.mNumIndices; j++) {
-            indices.push_back(face.mIndices[j]);
+            out_indices.push_back(face.mIndices[j]);
         }
     }
-
-    
-
-    BarinkEngine::Mesh result;
-    
-
-    result.vertices = vertices;
-    result.elements = indices;
-
-
-    return result;
-
 }

BarinkEngine/graphics/Renderable.cpp

@@ -3,18 +3,9 @@
 #include "PerfCounter.h"
 
 
-Renderable* Renderable::Load()
+BarinkEngine::Renderable::Renderable()
 {
-    return new Renderable();
-}
-
-Renderable::Renderable()
-{
-    meshes = ModelImporter::Test();
-
-    transform.Scale = glm::vec3(1.0f);
-    transform.Rotation = glm::vec3(0.0f, 0.0f, 0.0f);
-    transform.Position = glm::vec3(0.0f, 0.0f, 0.0f);
+    /*
     
         VAO.Create();
         VAO.Bind();
@@ -33,20 +24,20 @@ Renderable::Renderable()
         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(BarinkEngine::Vertex),(void* )offsetof(BarinkEngine::Vertex, vertices));
         glEnableVertexAttribArray(1);
     
-   vertexBuffer.Unbind(false);
+        //vertexBuffer.Unbind(false);
   
         VAO.Unbind();
-
+    */
 
 }
 
-Renderable::~Renderable()
+BarinkEngine::Renderable::~Renderable()
 {
-    glDeleteBuffers(1, &UV_id);
+   // glDeleteBuffers(1, &UV_id);
 }
 
-void Renderable::Draw()
-{
+// Draw call Example !!
+/*
         VAO.Bind();
         elementBuffer.Bind(true);
 
@@ -58,5 +49,5 @@ void Renderable::Draw()
         ES->DC++;
         glDrawElements(GL_TRIANGLES, static_cast<unsigned int>(meshes[0].elements.size()), GL_UNSIGNED_INT, NULL);
         VAO.Unbind();
+    */
     
-}

SandboxApplication/Sandbox.cpp

@@ -11,11 +11,11 @@ Camera* cam;
 
 Shader* shader;
 
-Renderable* Cube;
+BarinkEngine::Renderable* Cube;
 Material* matCube;
 Texture* textureCube;
 
-Renderable* Cube2;
+BarinkEngine::Renderable* Cube2;
 Material* matCube2;
 
 char* code = new char[254];
@@ -26,35 +26,15 @@ const std::string fragmentShaderSource = "build/SandboxApplication/Debug/test.fs
 
 
 
+
 /*
 * Runs once at startup 
 * - USe to initialize the game/sandbox/demo
 */
 void Start() {
 
-    /*
-        Building a very basic scene graph
-    */
-    SceneNode MyCube = SceneNode();
-    MyCube.name = "MyCube";
-
-    SceneNode MyBaby = SceneNode();
-    MyBaby.name = "Baby";
-
-    SceneNode MySecondCube = SceneNode();
-    MySecondCube.name = "MySecondCube";
-
-
-    MyCube.addChild(MyBaby);
-
-    
-    Scene scene = Scene("My awesome Game Scene");
-    scene.GetRoot().addChild(MyCube);
-    scene.GetRoot().addChild(MySecondCube);
-
-
-   // Walk scene graph
-    PrintSceneTree(scene.GetRoot(),0);
+// Walk scene graph
+//PrintSceneTree(scene.GetRoot(),0);
 
     shader = new Shader(vertexShaderSource, fragmentShaderSource);
 
@@ -69,7 +49,7 @@ void Start() {
     /*
     * load meshes 
     */
-    Cube = Renderable::Load();
+    Cube = 
     Cube2 = Renderable::Load();
     Cube->addChild(*Cube2);
 

SandboxApplication/Util.cpp

@@ -1,6 +1,6 @@
 #include "Util.h"
 
-void PrintSceneTree(SceneNode& node, int depth) {
+void PrintSceneTree(Node& node, int depth) {
     // Indent name based on depth
     std::cout << " ";
     for (int i = 0; i < depth; i++) {

SandboxApplication/Util.h

@@ -1,6 +1,6 @@
 #pragma once
 #include "BarinkEngine.h"
 
-void PrintSceneTree(SceneNode& node, int depth);
+void PrintSceneTree(Node& node, int depth);
 
 glm::mat4 CalculateModelMat(Transform& transform);