1

我试图让 Box2D PointLight 在屏幕上渲染，但在渲染时，它会引发异常。我已经修改了 API 和 Box2D 用户手册，并观看了有关该主题的视频，但还没有找到解决问题的方法。这是我的代码和错误。

package com.mygdx.test;

import box2dLight.PointLight;
import box2dLight.RayHandler;

import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.physics.box2d.World;

public class Test extends ApplicationAdapter {
    /** the camera **/
    OrthographicCamera camera;
    RayHandler rayHandler;
    World world;

    @Override
    public void create() {
        camera = new OrthographicCamera(48, 32);
        camera.update();
        world = new World(new Vector2(0, -10), true);
        rayHandler = new RayHandler(world);
        new PointLight(rayHandler, 32);
    }

    @Override
    public void render() {
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
        world.step(Gdx.graphics.getDeltaTime(), 8, 3);
        rayHandler.setCombinedMatrix(camera.combined);
        rayHandler.updateAndRender();
    }

和错误：

Exception in thread "LWJGL Application" com.badlogic.gdx.utils.GdxRuntimeException: java.lang.NoSuchMethodError: com.badlogic.gdx.graphics.glutils.FrameBuffer.getColorBufferTexture()Lcom/badlogic/gdx/graphics/Texture;
at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:127)
Caused by: java.lang.NoSuchMethodError: com.badlogic.gdx.graphics.glutils.FrameBuffer.getColorBufferTexture()Lcom/badlogic/gdx/graphics/Texture;
at box2dLight.LightMap.gaussianBlur(LightMap.java:76)
at box2dLight.LightMap.render(LightMap.java:37)
at box2dLight.RayHandler.render(RayHandler.java:328)
at box2dLight.RayHandler.updateAndRender(RayHandler.java:262)
at com.mygdx.test.Test.render(Test.java:33)
at com.badlogic.gdx.backends.lwjgl.LwjglApplication.mainLoop(LwjglApplication.java:215)
at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:120)
4

2 回答 2

2

我在新生成的 libgdx 项目中遇到了同样的问题，但是将 box2dlights 版本从 1.3 更新到 1.4 为我解决了这个错误。

于 2015-07-09T19:37:57.037 回答
0

您是否尝试过使用这种方法？

new PointLight(rayHandler, RAYS_NUM, new Color(1,1,1,1), lightDistance, x, y);

我也注意到了，你应该这样做

world.step();

在render()方法的末尾。可能不会解决问题，但我只是注意到

于 2015-07-02T17:25:49.357 回答