Texturing

src/main.c

@@ -3,6 +3,8 @@
 #include <math.h>
 #include <stdbool.h>
 
+#include "stb_image.h"
+
 #include "Renderer.h"
 #include "Input.h"
 
@@ -14,47 +16,69 @@ int main() {
 	glfwSetKeyCallback(window, &key_pressed);
 
 	float vertices[] = {
-		-0.3f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f,
-	 	 0.8f, -0.5f, 0.0f, 0.0f, 1.0f, 0.0f,
-		 0.3f,  0.5f, 0.0f, 0.0f, 0.0f, 1.0f
+		//pos					// ColorIndecies     //Texture coordnites
+		-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,	1.0f, 0.0f,
+		 0.0f,  0.5f, 0.0f, 	1.0f, 1.0f, 1.0f,	0.5f, 1.0f
 	};
-	float vertices2[] = {
-		-0.8f, -0.5f, 0.0f,
-		-0.3f, -0.5f, 0.0f,
-		-0.5f,  0.5f, 0.0f
-	};
-
-	char* vertex1 = "../shaders/vertex1.glsl\0";
-	char* fragment1 = "../shaders/fragment1.glsl\0";
-	char* vertex2 = "../shaders/vertex2.glsl\0";
-	char* fragment2 = "../shaders/fragment2.glsl\0";
-
-	unsigned int shader1, shader2;
-	printf("Compiling shader1\n");
+	// Compile Shader
+	char* vertex1 = "../assets/shaders/vertex3.glsl\0";
+	char* fragment1 = "../assets/shaders/fragment3.glsl\0";
+	unsigned int shader1;
 	shader1 = loadCompileShader(vertex1, fragment1);
-	printf("Compiling shader2\n");
-	shader2 = loadCompileShader(vertex2, fragment2);
 
-	unsigned int VAOs[2], VBOs[2];
-	glGenVertexArrays(2, VAOs);
-	glGenBuffers(2, VBOs);
+	// Initialise VBO and VAO
+	unsigned int VAO, VBO;
+	glGenVertexArrays(1, &VAO);
+	glGenBuffers(1, &VBO);
 	//unsigned int EBO;
 	//glGenBuffers(1, &EBO);
 
-	glBindVertexArray(VAOs[0]);
-
-	glBindBuffer(GL_ARRAY_BUFFER, VBOs[0]);
+	glBindVertexArray(VAO);
+	glBindBuffer(GL_ARRAY_BUFFER, VBO);
 	glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
-	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)0 );
+	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)0 );
 	glEnableVertexAttribArray(0);
-	glVertexAttribPointer(1, 3,GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)(3*sizeof(float)));
+	glVertexAttribPointer(1, 3,GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(3*sizeof(float)));
 	glEnableVertexAttribArray(1);
+	glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(6 * sizeof(float)));
+	glEnableVertexAttribArray(2);
+
+	// Set texture parametes
+	
+	float borderColor[] = { 1.0f, 1.0f, 0.0f, 1.0f };
+	glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, borderColor);
+
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+
+
+	// Generate Texture
+	unsigned int texture;
+	glGenTextures(1, &texture);
+	glBindTexture(GL_TEXTURE_2D, texture);
+
+	//Set Texture Parametes
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_MIRRORED_REPEAT);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_MIRRORED_REPEAT);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); 
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 
+
+	// Load Texture image
+	int width, height, channels;
+	unsigned char *data = stbi_load("../assets/textures/wall.jpg", &width, &height, &channels, 0);
+
+	if(data) {
+		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);
+		glGenerateMipmap(GL_TEXTURE_2D);
+	} else {
+		printf("failed to load texture\n");
+	}
+	
+	stbi_image_free(data);
+
 	
-	glBindVertexArray(VAOs[1]);
-	glBindBuffer(GL_ARRAY_BUFFER, VBOs[1]);
-	glBufferData(GL_ARRAY_BUFFER, sizeof(vertices2), vertices2, GL_STATIC_DRAW);
-	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0 );
-	glEnableVertexAttribArray(0);
 
 	while(!glfwWindowShouldClose(window)) {
 
@@ -62,24 +86,17 @@ int main() {
 		glClear(GL_COLOR_BUFFER_BIT);
 
 		glUseProgram(shader1);
-		glBindVertexArray(VAOs[0]);
+		glActiveTexture(GL_TEXTURE0);
+		glBindTexture(GL_TEXTURE_2D, texture);
+		glBindVertexArray(VAO);
 		glDrawArrays(GL_TRIANGLES, 0, 3);
 		
-		float time = glfwGetTime();
-		float green = (sin(time) / 2.0f) + 0.5f;
-
-		int vertexColorLocation = glGetUniformLocation(shader2, "Color");
-		glUseProgram(shader2);
-		glUniform4f(vertexColorLocation, 0.0f, green, 0.0f, 1.0f);
-
-		glBindVertexArray(VAOs[1]);
-		glDrawArrays(GL_TRIANGLES, 0, 3);
-		
-
 		glfwSwapBuffers(window);
 		glfwPollEvents();
 	}
 	
+	glDeleteVertexArrays(1, &VAO);
+	glDeleteBuffers(1, &VBO);
 	glfwTerminate();
 	return 0;
 }

src/stb_image.c

@@ -0,0 +1,2 @@
+#define STB_IMAGE_IMPLEMENTATION
+#include <stb_image.h>