LWJGL Getting Started HelloWorld code java exec窗口未打开

Question

我在MacOS上使用IntelliJ。我对编程比较陌生，并遵循LWJGL网站上的这个教程。我遵循了所有的指示，并将-XstartOnFirstThread添加到我的VM选项中。然而，每当我在IntelliJ中运行程序(HelloWorld.java)时，我都会在dock中看到java执行窗口，并获得"Hello LWJGL 3.2.3 build 13!"在控制台，但是窗户打不开，我根本看不到窗户。

我也试过从终端运行程序，但遇到"包____不存在"每个导入的错误。我不明白为什么会这样。

我的代码如下:

"

import org.lwjgl.*;
import org.lwjgl.glfw.*;
import org.lwjgl.opengl.*;
import org.lwjgl.system.*;
import java.nio.*;
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 HelloWorld {
// The window handle
private long window;
public void run() {
System.out.println("Hello LWJGL " + Version.getVersion() + "!");
init();
loop();
// Free the window callbacks and destroy the window
glfwFreeCallbacks(window);
glfwDestroyWindow(window);
// Terminate GLFW and free the error callback
glfwTerminate();
glfwSetErrorCallback(null).free();
}
private void init() {
// Setup an error callback. The default implementation
// will print the error message in System.err.
GLFWErrorCallback.createPrint(System.err).set();
// Initialize GLFW. Most GLFW functions will not work before doing this.
if ( !glfwInit() )
throw new IllegalStateException("Unable to initialize GLFW");
// Configure GLFW
glfwDefaultWindowHints(); // optional, the current window hints are already 
the default
glfwWindowHint(GLFW_VISIBLE, GLFW_FALSE); // the window will stay hidden 
after creation
glfwWindowHint(GLFW_RESIZABLE, GLFW_TRUE); // the window will be resizable
// Create the window
window = glfwCreateWindow(300, 300, "Hello World!", NULL, NULL);
if ( window == NULL )
throw new RuntimeException("Failed to create the GLFW window");
// Setup a key callback. It will be called every time a key is pressed, 
repeated or released.
glfwSetKeyCallback(window, (window, key, scancode, action, mods) -> {
if ( key == GLFW_KEY_ESCAPE && action == GLFW_RELEASE )
glfwSetWindowShouldClose(window, true); // We will detect this in the 
rendering loop
});
// Get the thread stack and push a new frame
try ( MemoryStack stack = stackPush() ) {
IntBuffer pWidth = stack.mallocInt(1); // int*
IntBuffer pHeight = stack.mallocInt(1); // int*
// Get the window size passed to glfwCreateWindow
glfwGetWindowSize(window, pWidth, pHeight);
// Get the resolution of the primary monitor
GLFWVidMode vidmode = glfwGetVideoMode(glfwGetPrimaryMonitor());
// Center the window
glfwSetWindowPos(
window,
(vidmode.width() - pWidth.get(0)) / 2,
(vidmode.height() - pHeight.get(0)) / 2
);
} // the stack frame is popped automatically
// Make the OpenGL context current
glfwMakeContextCurrent(window);
// Enable v-sync
glfwSwapInterval(1);
// Make the window visible
glfwShowWindow(window);
}
private void loop() {
// This line is critical for LWJGL's interoperation with GLFW's
// OpenGL context, or any context that is managed externally.
// LWJGL detects the context that is current in the current thread,
// creates the GLCapabilities instance and makes the OpenGL
// bindings available for use.
GL.createCapabilities();
// Set the clear color
glClearColor(1.0f, 0.0f, 0.0f, 0.0f);
// Run the rendering loop until the user has attempted to close
// the window or has pressed the ESCAPE key.
while ( !glfwWindowShouldClose(window) ) {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // clear the 
framebuffer
glfwSwapBuffers(window); // swap the color buffers
// Poll for window events. The key callback above will only be
// invoked during this call.
glfwPollEvents();
}
}
public static void main(String[] args) {
new HelloWorld().run();
}
}

"

编辑:

我算出这行

window = glfwCreateWindow(300, 300, "Hello World!", NULL, NULL);

init()中的导致了这个问题。当程序运行时，它永远不会超过这一行，我不知道为什么或如何完成它。

Answer 1

您需要将Mac OS上的前向兼容性设置为true。在init()中调用:

glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);

另外，你可能需要设置OpenGL版本。

glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
// This means you are setting the OpenGL version to be 3.3 (version_major.version_minor)