Question

我已经开始使用jMonkey引擎学习游戏开发。我可以使用TerrainQuad创建单一的地形图块，但是下一步我坚持使它无限。我已经浏览了wiki并希望使用TerrainGrid类，但我的代码似乎不起作用。我在网上浏览过并搜索过其他论坛但找不到任何其他代码示例来帮助。

我相信下面的代码，ImageTileLoader返回一个图像，该图像是该图块的高度图。我已修改它以每次返回相同的图像。但我所看到的只是一扇黑色的窗户。甚至没有调用Namer方法。感谢是否有人可以在网上提供一些示例或教程。

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 enter image description here

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

所以，我进一步研究了我的问题并且能够实现我想要的目标。但我仍然无法理解我的第一个代码上的错误是什么。下面是我通过修改here中的TerrainGrid示例获得的最终代码。以下是任何陷入相同情况的人的最终代码。这不是最后的事情，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);
    }
}

使用TerrainGrid的jMonkey中的无尽地形

1 个答案: