TreeEngine.java

import java.io.*;
import java.util.*;
import com.threed.jpct.*;
import com.threed.jpct.util.*;

public class TreeEngine
{
    private Vector<Object3D> trees;

    public TreeEngine(World world, Object3D ground)
    {
        char c = File.separatorChar;

        Object3D tree = Loader.load3DS("res" + c + "tree.3ds", 3f)[0];
        tree.rotateX((float) (-Math.PI / 2));
        tree.setSpecularLighting(true);
        tree.setShadingMode(Object3D.SHADING_GOURAUD);
        tree.setCollisionMode(Object3D.COLLISION_CHECK_SELF);
        tree.setCollisionOptimization(Object3D.COLLISION_DETECTION_OPTIMIZED);

        trees = new Vector<Object3D>();
        for (int i = 0; i < 25; i++)
        {
            trees.add(tree.cloneObject());
            trees.get(i).rotateY((float) (-Math.PI / Math.random() * 2));
            trees.get(i).setCenter(ground.getTransformedCenter());
            trees.get(i).translate(new SimpleVector(Math.random() * 800f - 400f, -200f, Math.random() * 800f - 400f));
            trees.get(i).build();
            world.addObject(trees.get(i));

            SimpleVector dir = new SimpleVector(0f, 400f, 0f);
            dir = trees.get(i).checkForCollisionEllipsoid(dir, new SimpleVector(1, 1, 1), 1);
            trees.get(i).translate(dir);
        }
    }

    public void setShadows(ShadowHelper sh)
    {
        for (int i = 0; i < trees.size(); i++)
        {
            sh.addCaster(trees.get(i));
        }
    }
}