java - jMonkey 中使用 TerrainGrid 的无尽地形

Question

我已经开始学习使用jMonkey引擎进行游戏开发。我能够使用 TerrainQuad 创建单个地形图 block ，但下一步我坚持使其无限。我已经浏览了 wiki 并想使用 TerrainGrid 类，但我的代码似乎不起作用。我在网上浏览并搜索了其他论坛，但找不到任何其他代码示例来提供帮助。

我相信下面的代码，ImageTileLoader 返回一个图像，它是该图 block 的高度图。我已经修改它以每次返回相同的图像。但我看到的只是一扇黑色的 window 。Namer 方法甚至没有被调用。如果有人可以帮助提供一些网上的示例或教程，我们将不胜感激。

terrain = new TerrainGrid("terrain", patchSize, 513, new ImageTileLoader(assetManager, new Namer() {
        public String getName(int x, int y) {
            //return "Scenes/TerrainMountains/terrain_" + x + "_" + y + ".png";
            System.out.println("X = " + x + ", Y = " + y);
            return "Textures/heightmap.png";
        }
    }));

这些是我的来源: jMonkeyEngine 3 Tutorial (10) - Hello Terrain , TerrainGridTest.java , ImageTileLoader

这是我使用 TerrainQuad 时的结果

我的完整代码，

// Sample 10 - How to create fast-rendering terrains from heightmaps, and how to
// use texture splatting to make the terrain look good.
public class HelloTerrain extends SimpleApplication {

    private TerrainQuad terrain;
    Material mat_terrain;
    private float grassScale = 64;
    private float dirtScale = 32;
    private float rockScale = 64;

    public static void main(String[] args) {
        HelloTerrain app = new HelloTerrain();
        app.start();
    }
    private FractalSum base;
    private PerturbFilter perturb;
    private OptimizedErode therm;
    private SmoothFilter smooth;
    private IterativeFilter iterate;

    @Override
    public void simpleInitApp() {
        flyCam.setMoveSpeed(200);

        initMaterial();

        AbstractHeightMap heightmap = null;
        Texture heightMapImage = assetManager.loadTexture("Textures/heightmap.png");
        heightmap = new ImageBasedHeightMap(heightMapImage.getImage());
        heightmap.load();


        int patchSize = 65;
        //terrain = new TerrainQuad("my terrain", patchSize, 513, heightmap.getHeightMap()); // * This Works but below doesnt work*

        terrain = new TerrainGrid("terrain", patchSize, 513, new ImageTileLoader(assetManager, new Namer() {
            public String getName(int x, int y) {
                //return "Scenes/TerrainMountains/terrain_" + x + "_" + y + ".png";
                System.out.println("X = " + x + ", Y = " + y);
                return "Textures/heightmap.png";
                // set to return the sme hieghtmap image.
            }
        }));



        terrain.setMaterial(mat_terrain);
        terrain.setLocalTranslation(0,-100, 0);
        terrain.setLocalScale(2f, 1f, 2f);
        rootNode.attachChild(terrain);


        TerrainLodControl control = new TerrainLodControl(terrain, getCamera());
        terrain.addControl(control);
    }

    public void initMaterial() {
        // TERRAIN TEXTURE material
        this.mat_terrain = new Material(this.assetManager, "Common/MatDefs/Terrain/HeightBasedTerrain.j3md");


        // GRASS texture
        Texture grass = this.assetManager.loadTexture("Textures/white.png");
        grass.setWrap(WrapMode.Repeat);
        this.mat_terrain.setTexture("region1ColorMap", grass);
        this.mat_terrain.setVector3("region1", new Vector3f(-10, 0, this.grassScale));

        // DIRT texture
        Texture dirt = this.assetManager.loadTexture("Textures/white.png");
        dirt.setWrap(WrapMode.Repeat);
        this.mat_terrain.setTexture("region2ColorMap", dirt);
        this.mat_terrain.setVector3("region2", new Vector3f(0, 900, this.dirtScale));


        Texture building = this.assetManager.loadTexture("Textures/building.png");
        building.setWrap(WrapMode.Repeat);


        this.mat_terrain.setTexture("slopeColorMap", building);
        this.mat_terrain.setFloat("slopeTileFactor", 32);

        this.mat_terrain.setFloat("terrainSize", 513);
    }
}

Answer 1

因此，我进一步解决了我的问题，并实现了我想要的目标。但我仍然无法理解我的第一个代码的错误是什么。下面是我通过修改 here 中的 TerrainGrid 示例获得的最终代码。下面是最终代码，供遇到同样情况的人使用。这不是最终的事情，但确实回答了我上面的问题。

public class TerrainGridTest extends SimpleApplication {

    private Material mat_terrain;
    private TerrainGrid terrain;
    private float grassScale = 64;
    private float dirtScale = 16;

    public static void main(final String[] args) {
        TerrainGridTest app = new TerrainGridTest();
        app.start();
    }

    @Override
    public void simpleInitApp() {
        this.flyCam.setMoveSpeed(100f);
        initMaterial();
        initTerrain();
        this.getCamera().setLocation(new Vector3f(0, 200, 0));
        this.getCamera().lookAt(new Vector3f(0,0,0), Vector3f.UNIT_Y);
        this.viewPort.setBackgroundColor(new ColorRGBA(0.7f, 0.8f, 1f, 1f));
        initLight();
    }

    @Override
    public void simpleUpdate(final float tpf) {

    }

    public void initMaterial() {
        // TERRAIN TEXTURE material
        this.mat_terrain = new Material(this.assetManager, "Common/MatDefs/Terrain/HeightBasedTerrain.j3md");


        // GRASS texture
        Texture grass = this.assetManager.loadTexture("Textures/white.png");
        grass.setWrap(WrapMode.Repeat);
        this.mat_terrain.setTexture("region1ColorMap", grass);
        this.mat_terrain.setVector3("region1", new Vector3f(-10, 0, this.grassScale));

        // DIRT texture
        Texture dirt = this.assetManager.loadTexture("Textures/white.png");
        dirt.setWrap(WrapMode.Repeat);
        this.mat_terrain.setTexture("region2ColorMap", dirt);
        this.mat_terrain.setVector3("region2", new Vector3f(0, 900, this.dirtScale));

        // ROCK texture
        //Texture rock = this.assetManager.loadTexture("Textures/Terrain/Rock2/rock.jpg");
        Texture building = this.assetManager.loadTexture("Textures/building.png");
        building.setWrap(WrapMode.Repeat);


        this.mat_terrain.setTexture("slopeColorMap", building);
        this.mat_terrain.setFloat("slopeTileFactor", 32);

        this.mat_terrain.setFloat("terrainSize", 513);
    }

    private void initLight() {
        DirectionalLight light = new DirectionalLight();
        light.setDirection((new Vector3f(-0.5f, -1f, -0.5f)).normalize());
        rootNode.addLight(light);
    }

    private void initTerrain() {
        this.terrain = new TerrainGrid("terrain", 65, 257, new ImageTileLoader(assetManager, new Namer() {

            public String getName(int x, int y) {
               //return "Interface/Scenes/TerrainMountains/terrain_" + x + "_" + y + ".png";
                return "Textures/heightmap.png";
            }
        }));

        this.terrain.setMaterial(mat_terrain);
        this.terrain.setLocalTranslation(0, 0, 0);
        this.terrain.setLocalScale(3f, 1.5f, 3f);
        this.rootNode.attachChild(this.terrain);

        TerrainLodControl control = new TerrainGridLodControl(this.terrain, getCamera());
        control.setLodCalculator( new DistanceLodCalculator(65, 2.7f) ); // patch size, and a multiplier
        this.terrain.addControl(control);
    }
}