I have started to learn game development using jMonkey engine. I am able to create single tile of terrain using TerrainQuad but as the next step I'm stuck at making it infinite. I have gone through the wiki and want to use the TerrainGrid class but my code does not seem to work. I have looked around on the web and searched other forums but cannot find any other code example to help.

I believe in the below code, ImageTileLoader returns an image which is the heightmap for that tile. I have modified it to return the same image every time. But all I see is a black window. The Namer method is not even called.

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";
        }
    }));

These are my sources:

• jMonkeyEngine 3 Tutorial (10) - Hello Terrain
• TerrainGridTest.java
• ImageTileLoader

This is the result when i use TerrainQuad: ,

My full code:

// 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);
    }
}