Lwjgl 3,如何在当前线程中获取OpenGL上下文当前？

Question

我在LWJGL 3中使用OpenGL,我得到以下错误;

Exception in thread "main" java.lang.IllegalStateException: There is no OpenGL context current in the current thread. at org.lwjgl.opengl.GL.getCapabilities(GL.java:157) at org.lwjgl.opengl.GL11.getInstance(GL11.java:1390) at org.lwjgl.opengl.GL11.glClearColor(GL11.java:1842) at com.base.engine.RenderUtil.initGraphics(RenderUtil.java:13) at com.base.engine.Main.<init>(Main.java:14) at com.base.engine.Main.main(Main.java:24)

这是RenderUtil类,其中从我的主类的构造函数中调用initGraphics.在使用GLFW创建窗口后,我也尝试调用initGraphics,它也生成了类似的错误消息.

package com.base.engine;

import static org.lwjgl.opengl.GL11.*;
import static org.lwjgl.opengl.GL30.*;

public class RenderUtil {

    public static void clearScreen() {
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    }

    public static void initGraphics() {
        glClearColor(0.0f, 0.0f, 0.0f, 0.0f);

        glFrontFace(GL_CW);
        glCullFace(GL_BACK);
        glEnable(GL_CULL_FACE);
        glEnable(GL_DEPTH_TEST);

        glEnable(GL_FRAMEBUFFER_SRGB);
    }
}

另外,我不使用多线程.要创建一个窗口,我Window.createWindow(1366, 768, "Test");从main方法中调用该方法.

    private static Long window;

    public static String createWindow(int width, int height, String title) {
        if (GLFW.glfwInit() == 0) {
            return "GLFW failed to initialise.";
        }

        GLFW.glfwWindowHint(GLFW.GLFW_SAMPLES, 4);
        window = GLFW.glfwCreateWindow(width, height, title,
                GLFW.glfwGetPrimaryMonitor(), 0);

        if (window == null) {
            GLFW.glfwTerminate();
            return "Failed to create window.";
        }

        GLFW.glfwMakeContextCurrent(window);
        return "GLFW has established a window.";
    }

我尝试RenderUtil.initGraphics();在我的main方法中放置两个不同的位置,都导致错误.

    private boolean isRunning = false;
    private Game game;


    // This is the constructor
    public Main() {
        // Pos 1 - RenderUtil.initGraphics();
        isRunning = false;
        game = new Game();
    }

    public static void main(String[] args) {
        System.out.println(Window.createWindow(1366, 768, "Test"));
        // Pos 2 - RenderUtil.initGraphics();
        Main game = new Main();
        game.start();
    }

Answer 1

GLContext.createFromCurrent()在createWindow方法的末尾添加一个调用.

需要此方法来设置LWJGL GL**类使用的上下文.

编辑:

自从最新的每晚(3.0.0b#11)以来,这已不再适用,因为该GLContext课程不再存在.而是GL.createCapabilities()在createWindow方法的最后添加.