Merge pull request #1 from E-Almqvist/refactor

Renderer Refactor

headers/renderer.hpp

@@ -1,7 +1,9 @@
 #pragma once
 
 #include <glm/fwd.hpp>
+#include <glm/glm.hpp>
 #include <vector>
+
 #include "shaders.hpp"
 #include "textures.hpp"
 
@@ -12,37 +14,49 @@
 #define VERT_SHADER_SRC_FILE "shaders/vertex.glsl"
 #define FRAG_SHADER_SRC_FILE "shaders/fragment.glsl"
 
-#define RUSTY_METAL_TEXTURE "assets/textures/rusty_metal.jpg"
+#define DEFAULT_FOV 45.0f
+#define NEAR_PLANE 0.1f
+#define FAR_PLANE 100.0f
 
 namespace Renderer {
-	class RenderObject {};
+	class RenderObject {
+		public:
+			RenderObject(std::vector<float> verts, std::vector<unsigned int> indices);
+			void render(GLFWwindow* win, glm::mat4 cameraTransform, glm::mat4 projectionTransform);
+			void transform(glm::mat4 T);
+			void preRenderHook();
+		private:
+			Shaders::Shader shader;
+			unsigned int EBO;
+			unsigned int VBO;
+			unsigned int VAO;
+			std::vector<float> vertsVec;
+			std::vector<unsigned int> indicesVec;
+	};
 
 	class Renderer3D {
 		public:
-			Renderer3D();
-			Renderer3D(std::vector<RenderObject> ROs);
+			Renderer3D(GLFWwindow* win);
+			Renderer3D(GLFWwindow* win, std::vector<RenderObject> ROs);
 
 			void setCamera(glm::vec3 pos);
 			void setFOV(float deg);
-			void render(GLFWwindow* win);
+			void spawnObject(RenderObject ro);
+			void render();
 		private:
-			std::vector<RenderObject> RenderObjects;
+			std::vector<RenderObject> renderObjects = std::vector<RenderObject>();
+			GLFWwindow* window;
+			glm::mat4 cameraTransform = glm::mat4(1.0f);
+			glm::mat4 projectionTransform = glm::mat4(1.0f);
 	};
 
-	class Obj2D {
+	class Obj2D : public RenderObject {
 		public:
-			Shaders::Shader shader;
-			Textures::Texture2D texture;
-
-			Obj2D(unsigned int indices[], unsigned int icount, float verts[], unsigned int vcount);
-
+			using RenderObject::RenderObject;
 			void setTexture(const char* t_src);
-			void transform(glm::mat4 T);
-			void render(GLFWwindow* win);
+			void preRenderHook();
 		private:
+			Textures::Texture2D texture;
 			void bind_texture(Textures::Texture2D texture);
-			unsigned int EBO;
-			unsigned int VBO;
-			unsigned int VAO;
 	};
 }

shaders/fragment.glsl

@@ -6,11 +6,8 @@ in vec4 VertexColor;
 in vec2 TexCoord;
 
 uniform sampler2D inpTexture;
-
-uniform float r;
-uniform float g;
-uniform float b;
+uniform vec3 rgbOffset = vec3(0.0, 0.0, 0.0);
 
 void main() {
-	FragColor = texture(inpTexture, TexCoord) * (VertexColor + vec4(r, g, b, 1.0f));
+	FragColor = texture(inpTexture, TexCoord) * (VertexColor + vec4(rgbOffset, 1.0));
 } 

shaders/vertex.glsl

@@ -6,9 +6,9 @@ layout (location = 2) in vec2 aTexCoord;
 out vec4 VertexColor;
 out vec2 TexCoord;
 
-uniform mat4 model = mat4(1.0f);
-uniform mat4 view = mat4(1.0f);
-uniform mat4 projection = mat4(1.0f);
+uniform mat4 model = mat4(1.0);
+uniform mat4 view = mat4(1.0);
+uniform mat4 projection = mat4(1.0);
 
 void main() {
 	gl_Position = projection * view * model * vec4(aPos, 1.0);

src/main.cpp

@@ -49,6 +49,8 @@ int main() {
 		return 1;
 	}
 
+	Renderer::Renderer3D renderer(win);
+
 	glfwMakeContextCurrent(win);
 
 	if ( !gladLoadGLLoader((GLADloadproc)glfwGetProcAddress) ) {
@@ -56,18 +58,18 @@ int main() {
 		return 1;
 	}
 
-	float verts[] = {
+	std::vector<float> verts({
 		 0.5f,  0.5f, 0.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 
 		 0.5f, -0.5f, 0.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f,
 		-0.5f, -0.5f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f,
 		-0.5f,  0.5f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f
-	};
+	});
 	// Vert struc: x y z  r g b  tx ty
 
-	unsigned int indices[] = {  
+	std::vector<unsigned int> indices({  
 		0, 1, 3, 
 		1, 2, 3	
-	};  
+	});  
 
 	glViewport(0, 0, WINDOW_WIDTH, WINDOW_HEIGHT);
 	glfwSetFramebufferSizeCallback(win, framebuffer_size_callback);
@@ -75,7 +77,9 @@ int main() {
 	float borderColor[] = {1.0f, 1.0f, 1.0f, 1.0f};
 	glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, borderColor);
 
-	Renderer::Obj2D ro(indices, sizeof(indices), verts, sizeof(verts));
+	Renderer::Obj2D ro(verts, indices);
+	renderer.spawnObject(ro);
+	renderer.setCamera(glm::vec3(0.0f, 0.0f, -8.0f));
 	ro.setTexture(RUSTY_METAL_TEXTURE);
 
 	// Window width & height
@@ -88,7 +92,8 @@ int main() {
 
 		/* OBJECT RENDERING */
 		float time = glfwGetTime();
-		float gVal = (sin(time) / 1.5f) + 0.5f;
+		float gVal = sin(time) / 10.5f;
+		renderer.setCamera(glm::vec3(0.0f, 0.0f, -gVal));
 
 		// Transformation
 		float rotang = time;
@@ -97,7 +102,8 @@ int main() {
 		T = glm::rotate(T, rotang, glm::vec3(1.0, 0.0, 1.0));
 		T = glm::scale(T, glm::vec3(0.5, 0.5, 0.5));
 		ro.transform(T);
-		ro.render(win);
+
+		renderer.render();
 
 		// glfw
 		glfwSwapBuffers(win);

src/renderer.cpp

@@ -2,70 +2,71 @@
 #include <glm/glm.hpp>
 #include <glm/gtc/matrix_transform.hpp>
 
+#include "GLFW/glfw3.h"
 #include "renderer.hpp"
 #include "shaders.hpp"
 
 namespace Renderer {
 
-	Renderer3D::Renderer3D() {
-		// TODO: Make more OOP
-	}
+	// Renderer3D
+	Renderer3D::Renderer3D(GLFWwindow* win) {
+		window = win;	
 
-	Renderer3D::Renderer3D(std::vector<RenderObject> ROs) : Renderer3D() {
-		RenderObjects = ROs;
+		setFOV(DEFAULT_FOV);
 	}
 
-	void Obj2D::transform(glm::mat4 T) {
-		shader.setMat4("model", T);
+	Renderer3D::Renderer3D(GLFWwindow* win, std::vector<RenderObject> ROs) : Renderer3D(win) {
+		renderObjects = ROs;
 	}
 
-	void Obj2D::setTexture(const char* t_src) {
-		texture.texture_src = t_src;
-		texture.load();
+	void Renderer3D::spawnObject(RenderObject ro) {
+		renderObjects.push_back(ro);
 	}
 
-	void Obj2D::render(GLFWwindow* win) {
+	void Renderer3D::setFOV(float fov) {
 		int width, height;
+		glfwGetWindowSize(window, &width, &height);
+		projectionTransform = glm::perspective(glm::radians(fov), (float)width / (float)height, NEAR_PLANE, FAR_PLANE);
+	}
 
-		// Camera 
-		glm::mat4 view = glm::mat4(1.0f);
-		view = glm::translate(view, glm::vec3(0.0f, 0.0f, -8.0f)); // Camera position
-		shader.setMat4("view", view);
-
-		glfwGetWindowSize(win, &width, &height);
-		glm::mat4 projection = glm::perspective(glm::radians(45.0f), (float)width / (float)height, 0.1f, 100.0f);
-		shader.setMat4("projection", projection);
-
-		// Use the shader etc
-		shader.use();
-
-		if (texture.loaded)
-			texture.bind();
+	void Renderer3D::setCamera(glm::vec3 pos) {
+		cameraTransform = glm::translate(cameraTransform, pos); 
+	}
 
-		glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
-		glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
+	void Renderer3D::render() {
+		for ( RenderObject ro: renderObjects ) 
+			ro.render(window, cameraTransform, projectionTransform);
 	}
 
-	Obj2D::Obj2D(unsigned int indices[], unsigned int icount, float verts[], unsigned int vcount) 
+	// RenderObject
+	RenderObject::RenderObject(std::vector<float> verts, std::vector<unsigned int> indices) 
 		: shader(VERT_SHADER_SRC_FILE, FRAG_SHADER_SRC_FILE) {
+		vertsVec = verts;
+		indicesVec = indices;
 
-		// Vertex buffer object
-		glGenBuffers(1, &VBO);
+		float vertsArray[vertsVec.size()];
+		std::copy(vertsVec.begin(), vertsVec.end(), vertsArray);
+
+		unsigned int indicesArray[indicesVec.size()];
+		std::copy(indicesVec.begin(), indicesVec.end(), indicesArray);
 
 		// Vertex Array Object
 		glGenVertexArrays(1, &VAO); // gen the VAO
 		glBindVertexArray(VAO); // bind it
 
-		// Copy verts into buffer
+		// Copy the verts into the buffer
+		glGenBuffers(1, &VBO);
 		glBindBuffer(GL_ARRAY_BUFFER, VBO);
-		glBufferData(GL_ARRAY_BUFFER, vcount, verts, GL_DYNAMIC_DRAW); // for moving stuff
-		//glBufferData(GL_ARRAY_BUFFER, sizeof(verts), verts, GL_STATIC_DRAW);
+		glBufferData(GL_ARRAY_BUFFER, vertsVec.size() * sizeof(vertsVec[0]), vertsArray, GL_DYNAMIC_DRAW); // for moving stuff
+		// printf("%u\n", sizeof(vertsVec[0]) * vertsVec.size());
 
+		// Copy the indices for the verts into another buffer
 		glGenBuffers(1, &EBO);
-
 		glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
-		glBufferData(GL_ELEMENT_ARRAY_BUFFER, icount, indices, GL_STATIC_DRAW);
+		glBufferData(GL_ELEMENT_ARRAY_BUFFER, indicesVec.size() * sizeof(indicesVec[0]), indicesArray, GL_STATIC_DRAW);
+		// printf("%u\n",indicesVec.size() * sizeof(indicesVec[0]));
 
+		// Shader stuff
 		// Pos
 		glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, VERTEX_ATTRIB_PTR_SIZE, (void*)0);
 		glEnableVertexAttribArray(0);
@@ -79,6 +80,36 @@ namespace Renderer {
 		glEnableVertexAttribArray(2);
 	}
 
+	void RenderObject::preRenderHook() {}
+
+	void RenderObject::render(GLFWwindow* win, glm::mat4 cameraTransform, glm::mat4 projectionTransform) {
+		shader.setMat4("view", cameraTransform);
+		shader.setMat4("projection", projectionTransform);
+
+		shader.use();
+
+		preRenderHook();
+
+		glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
+		glDrawElements(GL_TRIANGLES, indicesVec.size(), GL_UNSIGNED_INT, 0);
+	}
+
+	void RenderObject::transform(glm::mat4 T) {
+		shader.setMat4("model", T);
+	}
+
+	// Obj2D
+	void Obj2D::setTexture(const char* t_src) {
+		texture.texture_src = t_src;
+		texture.load();
+	}
+
+	void Obj2D::preRenderHook() {
+		printf("OBJ2D was here!\n");
+		if (texture.loaded)
+			texture.bind();
+	}
+
 	// Private stuff
 	void Obj2D::bind_texture(Textures::Texture2D new_texture) {
 		texture = new_texture;

src/shaders.cpp

@@ -81,10 +81,10 @@ namespace Shaders {
 	Shader::Shader(const char* vertPath, const char* fragPath) {
 		unsigned int vertShader = compileFromFile(GL_VERTEX_SHADER, vertPath);
 		unsigned int fragShader = compileFromFile(GL_FRAGMENT_SHADER, fragPath);
-		unsigned int shaders[2] = {vertShader, fragShader};
+		std::vector<unsigned int> shaders({vertShader, fragShader});
 
 		// Shader program ID
-		id = Shaders::createProgram( std::vector<unsigned int> (std::begin(shaders), std::end(shaders)) );
+		id = Shaders::createProgram(shaders);
 	}
 
 	void Shader::use() { glUseProgram(id); }

src/textures.cpp

@@ -29,13 +29,11 @@ namespace Textures {
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 
-		printf("[%i] \"%s\" - ", id, texture_src);
 		unsigned char* data = stbi_load(texture_src, &width, &height, &nrChannels, 0);
 		
 		if (data) {
 			glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);
 			glGenerateMipmap(GL_TEXTURE_2D);
-			printf("Loaded!\n");
 			loaded = true;
 		} else {
 			printf("[ERROR] Failed to load texture \"%s\"\n", texture_src);