From 1df02dd268685da10032974ecfdc3f229dc166a3 Mon Sep 17 00:00:00 2001
From: visil <workregor@mail.ru>
Date: Mon, 9 Oct 2023 10:48:43 +0300
Subject: =?UTF-8?q?=D0=9D=D0=B0=D1=87=D0=B0=D0=BB=D1=8C=D0=BD=D1=8B=D0=B9?=
 =?UTF-8?q?=20=D0=BA=D0=BE=D0=BC=D0=BC=D0=B8=D1=82;=20=D1=80=D0=B0=D0=B1?=
 =?UTF-8?q?=D0=BE=D1=82=D0=B0=D0=B5=D0=BC=20=D1=81=20=D1=88=D0=B5=D0=B9?=
 =?UTF-8?q?=D0=B4=D0=B5=D1=80=D0=B0=D0=BC=D0=B8?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 lesson01/main.cpp | 175 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 175 insertions(+)
 create mode 100644 lesson01/main.cpp

(limited to 'lesson01/main.cpp')

diff --git a/lesson01/main.cpp b/lesson01/main.cpp
new file mode 100644
index 0000000..9182d58
--- /dev/null
+++ b/lesson01/main.cpp
@@ -0,0 +1,175 @@
+#include <glad/glad.h>
+#include <iostream>
+#include <GLFW/glfw3.h>
+
+const char *vertexShaderSource = "#version 330 core\n"
+    "layout (location = 0) in vec3 aPos;\n"
+    "void main()\n"
+    "{\n"
+    "   gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n"
+    "}\0";
+
+const char *fragmentShaderSource = "#version 330 core\n"
+    "out vec4 FragColor;\n"
+    "\n"
+    "void main()\n"
+    "{\n"
+    "    FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);\n"
+    "}\0";
+
+void framebuffer_size_callback(GLFWwindow* window, int width, int height);
+
+void processInput(GLFWwindow *window);
+
+int main()
+{
+	glfwInit();
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+	
+	GLFWwindow* window = glfwCreateWindow(
+						800, 
+						600, 
+						"My OpenGL project", 
+						NULL, 
+						NULL
+					     );
+	if (window == NULL) {
+		std::cout << "Failed to create GLFW window" << std::endl;
+		glfwTerminate();
+		return -1;
+	}
+	glfwMakeContextCurrent(window);
+
+	if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
+		std::cout << "Failed to initialize GLAD" << std::endl;
+		return -1;
+	}    
+
+	glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
+	
+	// вершины фигуры
+	float vertices[] = {
+    		-0.5f, -0.5f, 0.0f,
+    		 0.5f, -0.5f, 0.0f,
+    		 0.5f,  0.5f, 0.0f,
+		-0.5f,  0.5f, 0.0f
+	};  
+	unsigned int indices[] = {
+		0, 1, 2, // первый треугольник
+		2, 3, 0  // второй треугольник
+	};
+
+
+	// ШЕЙДЕРЫ
+	unsigned int vertexShader;
+	vertexShader = glCreateShader(GL_VERTEX_SHADER);
+	glShaderSource(vertexShader, 1, &vertexShaderSource, NULL);
+	glCompileShader(vertexShader);
+
+	unsigned int fragmentShader;
+	fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
+	glShaderSource(fragmentShader, 1, &fragmentShaderSource, NULL);
+	glCompileShader(fragmentShader);
+	
+	int  success, success_vertex, success_fragment;
+	char infoLog[512];
+	glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &success_vertex);
+	glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &success_fragment);
+
+	// проверка компиляции шейдеров
+	if (!success_vertex) {
+		glGetShaderInfoLog(vertexShader, 512, NULL, infoLog);
+		std::cout << "ERROR::SHADER::VERTEX::COMPILATION_FAILED\n" 
+			  << infoLog << std::endl;
+	} else if (!success_fragment) {
+		glGetShaderInfoLog(fragmentShader, 512, NULL, infoLog);
+		std::cout << "ERROR::SHADER::FRAGMENT::COMPILATION_FAILED\n" 
+			  << infoLog << std::endl;
+	}
+
+	// линкуем шейдеры к программному объекту
+	unsigned int shaderProgram;
+	shaderProgram = glCreateProgram();
+
+	glAttachShader(shaderProgram, vertexShader);
+	glAttachShader(shaderProgram, fragmentShader);
+	glLinkProgram(shaderProgram);
+
+	glGetProgramiv(shaderProgram, GL_LINK_STATUS, &success);
+	if (!success) {
+		glGetProgramInfoLog(shaderProgram, 512, NULL, infoLog);
+		std::cout << "ERROR::PROGRAM::LINKING_FAILED\n" << infoLog 
+			  << std::endl;
+	}
+
+	glDeleteShader(vertexShader);
+	glDeleteShader(fragmentShader);
+
+	
+	// ИНИЦИАЛИЗАЦИЯ VAO
+	unsigned int VBO, VAO, EBO;
+	glGenVertexArrays(1, &VAO);
+	glGenBuffers(1, &VBO);
+	glGenBuffers(1, &EBO);
+	glBindVertexArray(VAO);
+
+	glBindBuffer(GL_ARRAY_BUFFER, VBO);
+	glBufferData(
+			GL_ARRAY_BUFFER, 
+			sizeof(vertices), 
+			vertices, 
+			GL_STATIC_DRAW
+		    );
+
+	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
+	glBufferData(
+			GL_ELEMENT_ARRAY_BUFFER, 
+			sizeof(indices), 
+			indices,
+			GL_STATIC_DRAW
+		    );
+
+	glVertexAttribPointer(
+				0, 
+				3, 
+				GL_FLOAT, 
+				GL_FALSE, 
+				3 * sizeof(float), 
+				(void*)0
+			     );
+	glEnableVertexAttribArray(0);
+
+	glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
+	while (!glfwWindowShouldClose(window)) {
+		processInput(window);
+
+		glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+		glClear(GL_COLOR_BUFFER_BIT);
+		
+		glUseProgram(shaderProgram);
+		glBindVertexArray(VAO);
+		/* glDrawArrays(GL_TRIANGLES, 0, 3); */
+		glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
+		/* glBindVertexArray(0); */
+
+		glfwSwapBuffers(window);
+		glfwPollEvents();
+	}
+
+	glfwTerminate();
+
+	return 0;
+}
+
+void framebuffer_size_callback(GLFWwindow* window, int width, int height)
+{
+    glViewport(0, 0, width, height);
+}
+
+void processInput(GLFWwindow *window)
+{
+	if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
+		glfwSetWindowShouldClose(window, true);
+}
-- 
cgit v1.2.3