code improvement

shaders/shader.fs

@@ -1,7 +1,6 @@
 #version 330 core
 out vec4 FragColor;
 
-in vec3 ourColor;
 in vec2 TexCoord;
 
 uniform sampler2D ourTexture;

shaders/shader.vs

@@ -1,14 +1,11 @@
 #version 330 core
 layout (location = 0) in vec3 aPos;
-layout (location = 1) in vec3 aColor;
+layout (location = 1) in vec2 aTexCoord;
-layout (location = 2) in vec2 aTexCoord;
 
-out vec3 ourColor;
 out vec2 TexCoord;
 
 void main()
 {
     gl_Position = vec4(aPos, 1.0);
-    ourColor = aColor;
     TexCoord = aTexCoord;
 }

src/main.cpp

@@ -3,6 +3,9 @@
 #include <GLFW/glfw3.h>
 #include <shaders/shader.hpp>
 #include <textures/texture.hpp>
+#include <glm/glm.hpp>
+#include <glm/gtc/matrix_transform.hpp>
+#include <glm/gtc/type_ptr.hpp>
 
 void framebuffer_size_callback(GLFWwindow* window, int width, int height);
 void processInput(GLFWwindow *window);
@@ -35,11 +38,10 @@ int main()
 	glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
 
 	float vertices[] = {
-	    // positions          // colors           // texture coords
+	     0.5f,  0.5f, 0.0f,  1.0f, 1.0f,
-	     0.5f,  0.5f, 0.0f,   1.0f, 0.0f, 0.0f,   1.0f, 0.0f,   // top right
+	     0.5f, -0.5f, 0.0f,  1.0f, 0.0f,
-	     0.5f, -0.5f, 0.0f,   0.0f, 1.0f, 0.0f,   1.0f, 1.0f,   // bottom right
+	    -0.5f, -0.5f, 0.0f,  0.0f, 0.0f,
-	    -0.5f, -0.5f, 0.0f,   0.0f, 0.0f, 1.0f,   0.0f, 1.0f,   // bottom left
+	    -0.5f,  0.5f, 0.0f,  0.0f, 1.0f 
-	    -0.5f,  0.5f, 0.0f,   1.0f, 1.0f, 0.0f,   0.0f, 0.0f    // top left 
 	};
 
 	unsigned int indices[] = {
@@ -47,31 +49,26 @@ int main()
 	    2, 3, 0
 	};
 
+	unsigned int VAO;
+	glGenVertexArrays(1, &VAO);
+	glBindVertexArray(VAO);
+
 	unsigned int VBO;
 	glGenBuffers(1, &VBO);
 	glBindBuffer(GL_ARRAY_BUFFER, VBO);
 	glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
 
-	unsigned int VAO;
-	glGenVertexArrays(1, &VAO);
-	glBindVertexArray(VAO);
-
 	unsigned int EBO;
 	glGenBuffers(1, &EBO);
 	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
 	glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
-	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
-	glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
 
-	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)0);
+	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void*)0);
 	glEnableVertexAttribArray(0);
 
-	glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(3* sizeof(float)));
+	glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void*)(3* sizeof(float)));
 	glEnableVertexAttribArray(1);
 
-	glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(6 * sizeof(float)));
-	glEnableVertexAttribArray(2);  
-
 	Shader ourShader("shaders/shader.vs", "shaders/shader.fs");
 	Texture sataaAndagii("textures/saataa_andagii.png");
 	Texture ohMyGah("textures/oh_my_gah.png");

src/texture.cpp

@@ -16,6 +16,7 @@ Texture::Texture(const char* texturePath)
 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 	// load and generate the texture
 	int width, height, nrChannels;
+	stbi_set_flip_vertically_on_load(true);
 	unsigned char *data = stbi_load(texturePath, &width, &height, &nrChannels, 0);
 	if (data)
 	{