Adding textures capabilities

* Added Texures to the two sample cubes
* Modified mesh structure
	- mesh now contains indices and vertices
	- Vertices contain vertices and uv's (later on they will also
	contain normals)

Solution definitely not perfect and needs improvement.

BarinkEngine/Include/BarinkEngine.h

@@ -2,9 +2,11 @@
 #include "glm/glm.hpp"
 #include "graphics/Shader.h"
 #include "graphics/Window.h"
+#include "graphics/Texture.h"
 #include "graphics/Camera.h"
 #include "graphics/Renderable.h"
 #include "Graphics/Material.h"
+
 #include "spdlog/spdlog.h"
 
 #include "Input/InputManager.h"

BarinkEngine/Include/Graphics/Mesh.h

@@ -4,10 +4,17 @@
 
 namespace BarinkEngine{
 
+
+	struct Vertex {
+		glm::vec3 vertices;
+		glm::vec2 uv;
+	};
+
 	class Mesh {
 	public:
-		std::vector<glm::vec3> vertices;
+		std::vector<Vertex> vertices;
 		std::vector<unsigned int > elements;
-		std::vector<glm::vec2> uv;
+	
 	};
+
 }

BarinkEngine/Include/Graphics/Renderable.h

@@ -3,6 +3,7 @@
 #include "Mesh.h"
 #include "Buffer.h"
 #include "Material.h"
+#include "Texture.h"
 #include "VertexArray.h"
 #include "Scene.h"
 
@@ -14,10 +15,13 @@ public:
 	*/
 	Buffer vertexBuffer;
 	Buffer elementBuffer;
+	//Buffer uv;
 	VertexArray VAO;
 
 
+	GLuint UV_id;
 	Material* material;
+	Texture* texture;
 
 	
 	Shader* shader;

BarinkEngine/Include/Graphics/Shader.h

@@ -10,7 +10,7 @@
 
 class Shader {
     private:
-        int id;
+        
         char* readFile (const char* filePath);
     public:
         Shader(const std::string vertexShaderPath, const std::string fragmentShaderPath);
@@ -22,5 +22,6 @@ class Shader {
         void setUniformFloat(std::string uniformName, float value)const;
         void setUniformInt(std::string uniformName, int value) const ;
 
+        int id;
 
 };

BarinkEngine/Include/Graphics/Texture.h

@@ -0,0 +1,18 @@
+#pragma once
+#include <spdlog/spdlog.h>
+#include <string>
+
+
+class Texture {
+public:
+	Texture(const std::string texturePath);
+	
+	void Bind();
+	void Unbind();
+
+
+private:
+
+	unsigned int Id;
+
+};

BarinkEngine/graphics/ModelImporter.cpp

@@ -82,16 +82,31 @@ std::vector<BarinkEngine::Mesh> ModelImporter::processNode(aiNode* node, const a
 }
 
 BarinkEngine::Mesh ModelImporter::processMesh(aiMesh* mesh, const aiScene* scene) {
-    std::vector<glm::vec3> vertices ; 
     std::vector<unsigned int> indices;
+    std::vector<BarinkEngine::Vertex> vertices;
 
     // Process vertices
     for (unsigned int i = 0; i < mesh->mNumVertices; i++) {
+        BarinkEngine::Vertex v{};
         glm::vec3 vector;
         vector.x = mesh->mVertices[i].x;
         vector.y = mesh->mVertices[i].y;
         vector.z = mesh->mVertices[i].z;
-        vertices.push_back(vector);
+        
+        v.vertices = vector;
+        
+        if (mesh->mTextureCoords[0]) {
+
+            glm::vec2 texCoord;
+
+            texCoord.x = mesh->mTextureCoords[0][i].x;
+            texCoord.y = mesh->mTextureCoords[0][i].y;
+
+            v.uv = texCoord;
+
+        }
+    
+        vertices.push_back(v);
     }
 
     // Process Indices
@@ -104,12 +119,15 @@ BarinkEngine::Mesh ModelImporter::processMesh(aiMesh* mesh, const aiScene* scene
         }
     }
 
+    
+
     BarinkEngine::Mesh result;
     
 
     result.vertices = vertices;
     result.elements = indices;
 
+
     return result;
 
 }

BarinkEngine/graphics/Renderable.cpp

@@ -10,13 +10,11 @@ Renderable* Renderable::Load()
 
 Renderable::Renderable()
 {
-
     meshes = ModelImporter::Test();
 
     transform.Scale = glm::vec3(1.0f);
-    transform.Rotation = glm::vec3(0.0f, 90.0f, 0.0f);
-    transform.Position = glm::vec3(0.0f, 0.0f, -10.0f);
-
+    transform.Rotation = glm::vec3(0.0f, 0.0f, 0.0f);
+    transform.Position = glm::vec3(0.0f, 0.0f, 0.0f);
 
     VAO.Create();
     VAO.Bind();
@@ -24,29 +22,38 @@ Renderable::Renderable()
 
     vertexBuffer.createBuffer();
     vertexBuffer.Bind(false);
-    vertexBuffer.setBufferData(&meshes[0].vertices[0], meshes[0].vertices.size() * sizeof(glm::vec3), false);
-
+    vertexBuffer.setBufferData(&meshes[0].vertices[0], meshes[0].vertices.size() * sizeof(BarinkEngine::Vertex), false);   
 
     elementBuffer.createBuffer();
     elementBuffer.Bind(true);
     elementBuffer.setBufferData(&meshes[0].elements[0], meshes[0].elements.size() * sizeof(unsigned int), true);
 
-    VAO.AttachAttribute(0, 3, 0);
+    VAO.AttachAttribute(0, 3, sizeof(BarinkEngine::Vertex));
 
-    vertexBuffer.Unbind(false);
-    VAO.Unbind();
+   glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(BarinkEngine::Vertex),(void*) offsetof(BarinkEngine::Vertex, vertices));
+   glEnableVertexAttribArray(1);
+    
+   vertexBuffer.Unbind(false);
+  
+   VAO.Unbind();
 
 
 }
 
 Renderable::~Renderable()
 {
+    glDeleteBuffers(1, &UV_id);
 }
 
 void Renderable::Draw()
 {
     VAO.Bind();
     elementBuffer.Bind(true);
+
+    glActiveTexture(GL_TEXTURE0);
+    glUniform1i(glGetUniformLocation(shader->id, "Texture"), GL_TEXTURE0);
+    texture->Bind();
+
     ES->verts = meshes[0].vertices.size();
     ES->DC++;
     glDrawElements(GL_TRIANGLES, static_cast<unsigned int>(meshes[0].elements.size()), GL_UNSIGNED_INT, NULL);

BarinkEngine/graphics/Texture.cpp

@@ -0,0 +1,40 @@
+#include "../Include/Graphics/Texture.h"
+#include <glad/glad.h>
+#include <GLFW/glfw3.h>
+#define STB_IMAGE_IMPLEMENTATION
+#include "Graphics/stb_image.h"
+#include <iostream>
+
+Texture::Texture(const std::string texturePath) {
+
+	int width, height, channels;
+	unsigned char* data = stbi_load(texturePath.c_str(), &width, &height, &channels, 0);
+	std::cout << channels << std::endl;
+
+	if (data) {
+		glGenTextures(1, &Id);
+
+		glBindTexture(GL_TEXTURE_2D, Id);
+		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);
+		glGenerateMipmap(GL_TEXTURE_2D);
+
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+	}
+	else {
+		spdlog::error("Failed to load image (%s)", texturePath );
+	}
+	stbi_image_free(data);
+
+}
+
+void Texture::Bind() {
+	glBindTexture(GL_TEXTURE_2D, Id);
+}
+
+void Texture::Unbind() {
+	glBindTexture(GL_TEXTURE_2D, 0);
+}

BarinkEngine/graphics/shaders/fragment.shader

@@ -2,8 +2,13 @@
 
 out vec4 FragColor;
 
-uniform vec3 MatColour;
+uniform vec3 Color;
+
+in vec2 TexCoord;
+
+uniform sampler2D Texture;
+
 
 void main(){
-	FragColor = vec4(MatColour, 1.0f);
+	FragColor = mix ( texture(Texture, TexCoord), vec4(Color, 1.0f));
 }

BarinkEngine/graphics/shaders/vertex.shader

@@ -1,10 +1,15 @@
 #version 440 core
 in layout(location=0) vec3 aPos;
+in layout(location=1) vec2 uv;
+
 uniform mat4 M;
 uniform mat4 V;
 uniform mat4 P;
 
+out vec2 TexCoord;
+
 
 void main() {
+    TexCoord = uv;
     gl_Position = P * V * M * vec4(aPos.x, aPos.y, aPos.z, 1.0);
 }

BarinkEngine/premake5.lua

@@ -16,7 +16,7 @@ project "BarinkEngine"
     "../libs/assimp/include",
     "../libs/glad/include",
     "../libs/glfw/include",
-    "../libs/tinygltf",
+   -- "../libs/tinygltf",
     "../libs/glew/include",
     "../libs/glm",
     "../libs/ImGui",

SandboxApplication/GUI.cpp

@@ -33,3 +33,9 @@ void transformWindow(Transform& transform, std::string PanelName) {
     ImGui::End();
 
 }
+
+void materialWindow(Material& material, std::string PanelName) {
+    ImGui::Begin(PanelName.c_str());
+    ImGui::ColorPicker3("Color:", &material.Color[0]);
+    ImGui::End();
+}

SandboxApplication/GUI.h

@@ -5,3 +5,4 @@
 void CameraTool(Camera* camera);
 void ScriptingTool(char* code);
 void transformWindow(Transform& transform, std::string PanelName);
+void materialWindow(Material& material, std::string PanelName);

SandboxApplication/Sandbox.cpp

@@ -7,11 +7,15 @@
 * Define globals
 */
 Camera* cam;
-Renderable* Cube;
-Renderable* Cube2;
+
 
 Shader* shader;
+
+Renderable* Cube;
 Material* matCube;
+Texture* textureCube;
+
+Renderable* Cube2;
 Material* matCube2;
 
 char* code = new char[254];
@@ -54,6 +58,8 @@ void Start() {
 
     shader = new Shader(vertexShaderSource, fragmentShaderSource);
 
+    textureCube = new Texture("build/SandboxApplication/Debug/die.jpg");
+
     matCube = new Material(*shader);
     matCube->Color = glm::vec3(1.0, 0.0, 0.0);
 
@@ -67,7 +73,17 @@ void Start() {
     Cube2 = Renderable::Load();
     Cube->addChild(*Cube2);
 
-    cam = new Camera(glm::vec3(0.0f, 1.5f, -10.0f), glm::vec3(0.0f, 0.0f, 0.0f), 90.0f);
+    Cube->shader = shader;
+    Cube2->shader = shader;
+
+    Cube->texture = textureCube;
+    Cube2->texture = textureCube;
+
+    Cube2->transform.Position = glm::vec3(-9.0f, 0.0f, 0.0f);
+
+    Cube->transform.Position = glm::vec3(-8.0f, 0.0f, -2.0f);
+
+    cam = new Camera(glm::vec3(0.0f, 1.5f, 0.0f), glm::vec3(0.0f, 0.0f, 0.0f), 90.0f);
 
     memset(code, '\0', 254);
 
@@ -98,6 +114,9 @@ void ImmediateGraphicsDraw() {
 
     transformWindow(Cube2->transform, "Transform (Cube2)");
 
+    materialWindow(*matCube, "Material Cube");
+    materialWindow(*matCube2, "Material Cube2");
+
 
 
 }