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import org.lwjgl.*;
import org.lwjgl.glfw.*;
import org.lwjgl.opengl.*;
import org.lwjgl.system.*;
import java.nio.*;
import java.util.Objects;
import static org.lwjgl.glfw.Callbacks.*;
import static org.lwjgl.glfw.GLFW.*;
import static org.lwjgl.opengl.GL11.*;
import static org.lwjgl.system.MemoryStack.*;
import static org.lwjgl.system.MemoryUtil.*;
public class Main {
private long window;
public void run() {
System.out.println("Hello LWJGL " + Version.getVersion() + "!");
init();
loop();
glfwFreeCallbacks(window);
glfwDestroyWindow(window);
glfwTerminate();
Objects.requireNonNull(glfwSetErrorCallback(null)).free();
}
private void init() {
GLFWErrorCallback.createPrint(System.err).set();
if ( !glfwInit() )
throw new IllegalStateException("Unable to initialize GLFW");
glfwDefaultWindowHints();
glfwWindowHint(GLFW_VISIBLE, GLFW_TRUE);
glfwWindowHint(GLFW_RESIZABLE, GLFW_TRUE);
window = glfwCreateWindow(800, 600, "Demo!", NULL, NULL);
if ( window == NULL )
throw new RuntimeException("Failed to create the GLFW window");
glfwSetKeyCallback(window, (window, key, scancode, action, mods) -> {
if ( key == GLFW_KEY_ESCAPE && action == GLFW_RELEASE )
glfwSetWindowShouldClose(window, true);
});
try ( MemoryStack stack = stackPush() ) {
IntBuffer pWidth = stack.mallocInt(1);
IntBuffer pHeight = stack.mallocInt(1);
glfwGetWindowSize(window, pWidth, pHeight);
GLFWVidMode glfwVidMode = glfwGetVideoMode(glfwGetPrimaryMonitor());
if (glfwVidMode != null) {
glfwSetWindowPos(
window,
(glfwVidMode.width() - pWidth.get(0)) / 2,
(glfwVidMode.height() - pHeight.get(0)) / 2
);
}
}
glfwMakeContextCurrent(window);
glfwSwapInterval(1);
glfwShowWindow(window);
}
private void loop() {
GL.createCapabilities();
glClearColor(1.0f, 0.0f, 0.0f, 0.0f);
while ( !glfwWindowShouldClose(window) ) {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glfwSwapBuffers(window);
glfwPollEvents();
}
}
public static void main(String[] args) {
new Main().run();
}
}
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