Here’s a minimal working example in C (GLUT/FreeGLUT):
To render text in , you must typically build your own system because the API lacks built-in font support. The most common approach is to use a Font Atlas , where character glyphs are pre-rendered into a single texture and then drawn as individual 2D quads . Core Approaches
While we are now in the era of , Vulkan , and DirectX 12 , OpenGL 2.0 remains the "baseline" for many applications.
// Create a program GLuint program = glCreateProgram(); glAttachShader(program, vertexShader); glAttachShader(program, fragmentShader); glLinkProgram(program); opengl 2
void display() glClear(GL_COLOR_BUFFER_BIT
To get started with OpenGL 2, you'll need to install the OpenGL 2 SDK and a compatible graphics driver.
Here is a simple example that creates a window and displays a triangle: Here’s a minimal working example in C (GLUT/FreeGLUT):
This turned simple points into textured images, making it much easier to render massive particle systems like smoke, fire, and rain. The Legacy of OpenGL 2
In OpenGL 2, a context is a container for OpenGL 2 state, and a window is a platform-specific window that displays OpenGL 2 content.
This code creates a window, sets up a vertex shader and fragment shader, and displays a triangle. // Create a program GLuint program = glCreateProgram();
glfwSwapBuffers(window); glfwPollEvents();
// Initialize GLEW if (glewInit() != GLEW_OK) glfwTerminate(); return -1;
// Clean up glDeleteVertexArrays(1, &vao); glDeleteBuffers(1, &vbo); glDeleteProgram(program); glDeleteShader(fragmentShader); glDeleteShader(vertexShader); glfwTerminate();