import java.applet.Applet;
import java.awt.*;
import java.util.*;
import java.awt.geom.*;
import com.sun.j3d.utils.geometry.ColorCube;
import com.sun.j3d.utils.universe.SimpleUniverse;
import com.sun.j3d.utils.behaviors.keyboard.*;
import com.sun.j3d.utils.image.*;

import javax.media.j3d.*;
import javax.vecmath.*;

public class Seinad extends Applet {
  LinkedList seinad=new LinkedList();
  public Seinad() {
	setLayout(new BorderLayout());
	Canvas3D c = new Canvas3D(SimpleUniverse.getPreferredConfiguration());
	add(c, BorderLayout.CENTER);

	BranchGroup juur = new BranchGroup();
   juur.addChild(looSein(2, -10, -2, -10, "taust.gif"));  //x1, z1, x2, z2
   juur.addChild(looSein(3, -7, 3, -12));
   juur.addChild(looSein(-5, 0, -5, -8, Color.blue));

	AmbientLight taustavalgus=new AmbientLight();
	taustavalgus.setInfluencingBounds(new BoundingSphere(new Point3d(), 100));
	juur.addChild(taustavalgus);
  

	SimpleUniverse u = new SimpleUniverse(c);
        u.getViewingPlatform().setNominalViewingTransform();

 
   TransformGroup tg=u.getViewingPlatform().getViewPlatformTransform();
   Klahviliikur k=new Klahviliikur(tg);
   k.setSchedulingBounds(new BoundingSphere(new Point3d(), 1000));
   juur.addChild(k);
      
	u.addBranchGraph(juur);
  }
  
  Shape3D looSein(double x1, double z1, double x2, double z2){
     return looSein(x1, z1, x2, z2, null, Color.green);
  }
  Shape3D looSein(double x1, double z1, double x2, double z2, String pilt){
     return looSein(x1, z1, x2, z2, pilt, null);
  }
  Shape3D looSein(double x1, double z1, double x2, double z2, Color varv){
     return looSein(x1, z1, x2, z2, null, varv);
  }
  Shape3D looSein(double x1, double z1, double x2, double z2, String pilt, Color varv){
    QuadArray nurgad=new QuadArray(4, GeometryArray.COORDINATES | GeometryArray.COLOR_3 | GeometryArray.NORMALS
             | GeometryArray.TEXTURE_COORDINATE_2);
	nurgad.setCoordinate(0, new Point3d( x1, 0, z1));
	nurgad.setCoordinate(1, new Point3d( x1, 5, z1));
	nurgad.setCoordinate(2, new Point3d( x2, 5, z2));
	nurgad.setCoordinate(3, new Point3d( x2, 0, z2));
    seinad.add(new Line2D.Float((float)x1, (float)z1, (float)x2, (float)z2));
    Appearance a=new Appearance();
    if(pilt!=null){
     try{
        nurgad.setTextureCoordinate(0, 0, new TexCoord2f(1, 0));
        nurgad.setTextureCoordinate(0, 1, new TexCoord2f(1, 1));
        nurgad.setTextureCoordinate(0, 2, new TexCoord2f(0, 1));
        nurgad.setTextureCoordinate(0, 3, new TexCoord2f(0, 0));
        TextureLoader mustrilugeja=new TextureLoader("taust1.gif", this);
        ImageComponent2D mustripilt=mustrilugeja.getImage();
        Texture2D muster = new Texture2D(Texture.BASE_LEVEL, Texture.RGBA,
                                mustripilt.getWidth(), mustripilt.getHeight());
        muster.setImage(0, mustripilt);
        a.setTexture(muster);
     }catch(Exception viga){
       System.out.println("Probleem mustriga: "+viga);
     }
    } else {
       if(varv==null){varv=Color.green;}
       Material materjal=new Material(
         new Color3f(Color.black),  //hajuvalgus
         new Color3f(varv),  //eralduv
         new Color3f(varv),    //peegelduv valgus
         new Color3f(Color.black),  1 //läige
       );
       a.setMaterial(materjal);
   }
   PolygonAttributes pind=new PolygonAttributes();
   pind.setCullFace(PolygonAttributes.CULL_NONE);  //et ka teine pool näha oleks
   a.setPolygonAttributes(pind);
 

    Shape3D kujund=new Shape3D();
    kujund.setGeometry(nurgad);
    kujund.setAppearance(a);  
	return kujund;
  }
   

  class Klahviliikur extends KeyNavigatorBehavior{
    TransformGroup siht;
    Transform3D t=new Transform3D();
    Matrix3f m=new Matrix3f();
    Vector3f v=new Vector3f();
    Transform3D vanatr=new Transform3D();
    Vector3f vana=new Vector3f();
    Transform3D uustr=new Transform3D();
    Vector3f uus=new Vector3f();
    double kaugus=1;
    
    public Klahviliikur(TransformGroup tg1){
      super(tg1);
      siht=tg1;
    }
    public void processStimulus(Enumeration e){
      siht.getTransform(vanatr);
      vanatr.get(vana);
      super.processStimulus(e);
      siht.getTransform(uustr);
      uustr.get(uus);
     if(!vana.equals(uus)){
      //System.out.println("Kohad: "+vana.x+" "+vana.z+"  "+uus.x+" "+uus.z);
      boolean teeVaba=true;
      for(int i=0;i<seinad.size(); i++){
        Line2D.Float sein=(Line2D.Float)seinad.get(i);
//        System.out.println("Sein: "+sein.x1+" "+sein.y1+" "+sein.x2+" "+sein.y2);
        if(
          sein.intersectsLine(vana.x, vana.z, uus.x, uus.z) ||
          sein.ptSegDist(uus.x, uus.z)<kaugus
         ){
          teeVaba=false;
        }
      }
      if(!teeVaba){
        siht.setTransform(vanatr);
        Toolkit.getDefaultToolkit().beep();
      }
      //System.out.println(teeVaba);
     }
      
    }
  }


    public static void main(String[] args) {
      Frame f=new Frame("Seinad");
      f.add(new Seinad());
      f.setSize(300, 300);
      f.setVisible(true);
    }
}