I am trying to do terrain generation in jMonkeyEnging, and have followed the tutorial (http://jmonkeyengine.org/wiki/doku.php/jme3:beginner:hello_terrain) but have run into a slight problem. At last chunck of code in the simpleInitApp method (the Level Of Detail), I am getting the errors:
1. Cannot Find Symbol: class list
2. Cannot Find Symbol: class camera
3. Cannot Find Symbol: class arrayList
when I delete the Level Of Detail coding, I get the error when running:
1. SEVERE: Uncaught exception thrown in Thread[LWJGL Renderer Thread,5,main]
java.lang.NullPointerException
at mygame.Main.simpleInitApp(Main.java:35)
at com.jme3.app.SimpleApplication.initialize(SimpleApplication.java:231)
at com.jme3.system.lwjgl.LwjglAbstractDisplay.initInThread(LwjglAbstractDisplay.java:129)
at com.jme3.system.lwjgl.LwjglAbstractDisplay.run(LwjglAbstractDisplay.java:205)
at java.lang.Thread.run(Thread.java:722)
What am I doing wrong, that's not in the tutorial(or my code, below)
package mygame;
import com.jme3.app.SimpleApplication;
import com.jme3.material.Material;
import com.jme3.terrain.geomipmap.TerrainLodControl;
import com.jme3.terrain.heightmap.AbstractHeightMap;
import com.jme3.terrain.geomipmap.TerrainQuad;
import com.jme3.terrain.geomipmap.lodcalc.DistanceLodCalculator;
import com.jme3.terrain.heightmap.HillHeightMap; // for exercise 2
import com.jme3.terrain.heightmap.ImageBasedHeightMap;
import com.jme3.texture.Texture;
import com.jme3.texture.Texture.WrapMode;
import jme3tools.converters.ImageToAwt;
/**
* test
* @author Me
*/
public class Main extends SimpleApplication {
public static void main(String[] args) {
Main app = new Main();
app.start();
}
private TerrainQuad terrain;
Material mat_terrain;
@Override
public void simpleInitApp() {
flyCam.setMoveSpeed(50);
//add grass to the mat_terrain
Texture grass = assetManager.loadTexture("Textures/grass.jpg");
mat_terrain.setTexture("tex1", grass);
mat_terrain.setFloat("tex1Scale", 64f);
//add dirt to the mat_terrain
Texture dirt = assetManager.loadTexture("Textures/dirt.jpg");
mat_terrain.setTexture("tex2", dirt);
mat_terrain.setFloat("tex2Scale", 32f);
//add roads to the mat_terrain
Texture road = assetManager.loadTexture("Textures/road.jpg");
mat_terrain.setTexture("tex2", road);
mat_terrain.setFloat("tex3Scale", 128f);
//deal with the generation
AbstractHeightMap heightMap = null;
HillHeightMap heightmap = null;
try {
heightmap = new HillHeightMap(513, 1000, 50, 100, (byte) 3);
} catch (Exception ex) {
ex.printStackTrace();
}
//create the world
int patchSize = 65;
terrain = new TerrainQuad("my terrain", patchSize, 513, heightmap.getHeightMap());
//material, position, scale
terrain.setMaterial(mat_terrain);
terrain.setLocalTranslation(0, -100, 0);
terrain.setLocalScale(2f, 1f, 2f);
rootNode.attachChild(terrain);
//LOD
List<Camera> cameras = new ArrayList<Camera>();
cameras.add(getCamera());
TerrainLodControl control = new TerrainLodControl(terrain, cameras);
terrain.addControl(control);
}
}
