The basic concept of a wallhack is to render objects (in this case, players or other entities) regardless of whether they are behind walls or not. This typically involves:
// Game loop while (!glfwWindowShouldClose(window)) glClearColor(0.2f, 0.3f, 0.3f, 1.0f); glClear(GL_COLOR_BUFFER_BIT); opengl wallhack cs 1.6