Hi stormrage!
Thank you for your informations about your plugin!
In your sample-code, there is the line “grassArea = new GrassArea(terrain, 8, assetManager, 75);” As far as I understood, the “terrain”-variable is an instance of TerrainQuad. So I would have to “give in” a TerrainQuad, where the grass should appear. I hope I got this right, but maybe I’m completely wrong. That was why I wanted to obtain a specific TerrainQuad out of my terrain. I thought there would be a function like: terrainNode.getTerrainQuadAt(x,y), where the result can be given to your sample-code, which leads to “growing” grass on this particular TerrainQuad.
Possible, but I don’t think that it is your fault! My english isn’t the best. Sorry for that.
That won’t be a problem on my side. At least not for now. My goal would be reached, when I press play and there appears grass in the scene. I’m not in the state of developing something, I just tinker around an want to understand the different solutions. In this case, I think, I’m on the wrong way. Maybe I’m thinking too simple.
I thought, that I have to give in the terrain (or part(s) of it) to your plugin, so it can figure out which position the grass could be placed. That’s the reason why I wanted to obtain a TerrainQuad from the terrain.
I think the greatest problem now is my lack of english-knowledge. 
Maybe it would be easier to paste my actual code here, so someone could say: “You are an idiot! Trys this and you are fine.”
Here the stripped down and not working code:
package mygame.appstates;
import com.Stomrage.grassybanana.GrassArea.GrassArea;
import com.Stomrage.grassybanana.GrassArea.GrassArea.ColorChannel;
import com.Stomrage.grassybanana.GrassArea.GrassArea.DensityMap;
import com.Stomrage.grassybanana.GrassArea.GrassAreaControl;
import com.jme3.app.Application;
import com.jme3.app.SimpleApplication;
import com.jme3.app.state.AbstractAppState;
import com.jme3.app.state.AppStateManager;
import com.jme3.asset.AssetManager;
import com.jme3.bullet.BulletAppState;
import com.jme3.bullet.control.RigidBodyControl;
import com.jme3.renderer.Camera;
import com.jme3.renderer.queue.RenderQueue;
import com.jme3.scene.Node;
import com.jme3.scene.Spatial;
import java.util.logging.Level;
import java.util.logging.Logger;
import mygame.Main;
public class Terrain extends AbstractAppState {
private SimpleApplication app;
private Node rootNode;
private AssetManager assetManager;
private BulletAppState bulletAppState;
@Override
public void initialize(AppStateManager stateManager, Application application) {
super.initialize(stateManager, application);
app = (SimpleApplication) application;
rootNode = app.getRootNode();
assetManager = app.getAssetManager();
bulletAppState = Main.getBulletAppState();
init();
grassInit();
}
@Override
public void update(float tpf) {
}
Spatial terrain;
private void init() {
terrain = assetManager.loadModel("Scenes/CarDemo.j3o");
RigidBodyControl terrainControl = new RigidBodyControl(0.0f);
terrain.addControl(terrainControl);
terrain.setShadowMode(RenderQueue.ShadowMode.Receive);
rootNode.attachChild(terrain);
bulletAppState.getPhysicsSpace().add(terrainControl);
}
private void grassInit() {
Camera cam = app.getCamera();
GrassArea grassArea =null;
try {
//Your TerrainQuad where you want your grass to grow, The minimum holder size, and the Grass draw distance
grassArea = new GrassArea(terrain, 8, assetManager, 75);
//A x-tiled atlas texture
grassArea.setColorTexture(assetManager.loadTexture("Textures/tile_1.png"));
//A dissolve texture, (a perlin noise is one of the best choice)
grassArea.setDissolveTexture(assetManager.loadTexture("Textures/noise.png"));
//A density map for the grass planting
grassArea.addDensityMap(assetManager.loadTexture("Textures/noise_2.png"));
//A layer of grass linked to a density map
grassArea.addLayer(0f, 0.5f, 2f, ColorChannel.RED_CHANNEL, DensityMap.DENSITY_MAP_1, 2f, 3f);
grassArea.generate();
} catch (Exception ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
}
GrassAreaControl grassAreaControl = new GrassAreaControl(cam);
grassArea.addControl(grassAreaControl);
rootNode.attachChild(grassArea);
}
}
I got stuck on this line: grassArea = new GrassArea(terrain, 8, assetManager, 75); Cause I’m not able to set the “terrain”-variable correct.
Thank you for investing time in such noob-questions!