// Tiny3D -- simple example of an "authoring tool" in Java
// using the VRML External Interface.

// Kenneth B. Russell (kbrussel@media.mit.edu)
// changes by Sylvere-Martin.Michiellot@tecfa.unige.ch

import java.applet.*;
import java.awt.*;
import java.util.*;
import vrml.external.field.*;
import vrml.external.exception.*;
import vrml.external.Node;
import vrml.external.Browser;
import TinyClump;
import VbRotation;
import VbVec3f;
import VRMLExtractor;

public class Tiny3D extends Applet {
  // One instance variable per slider, to tell what controls what
  Scrollbar transx;
  Scrollbar transy;
  Scrollbar transz;
  Scrollbar rotx;
  Scrollbar roty;
  Scrollbar rotz;
  Scrollbar scalex;
  Scrollbar scaley;
  Scrollbar scalez;
  Scrollbar colr;
  Scrollbar colg;
  Scrollbar colb;
  
  TextArea textarea;
  Label label0;
  Label label1;
  Label label2;
  Label label3;
  Label label4;
  Label label5;
  Label label6;
  Button buttonCube;
  Button buttonSphere;
  Button buttonCone;
  Button buttonCylinder;
  Button buttonVRML;

  // Browser we're using
  Browser browser;
  // Root of the scene graph (to which we add our clumps)
  Node root;

  // Array of the transform hierarchies we've added to the scene
  Vector clumps;
  int topIndex;
  
  // Current clump we're editing
  TinyClump curClump = null;

  static int transformRange = 40;

  public void start() {

    // Initialization of our instance variables
    clumps = new Vector();
    topIndex = -1;

    //
    // Initialize connection to Cosmo Player
    //

    browser = Browser.getBrowser(this);

    //
    // Get handle to root of the scene graph
    //
    
    try {
      root = browser.getNode("ROOT");
    }
    catch (InvalidNodeException e) {
      System.out.println("PROBLEMS!: " + e);
    }

    //
    // Build the user interface
    //
    super.start();
        
    setLayout(null);
    setBackground(new Color(0xbdb9a3));
    resize(515, 300);
    setFont(new Font("Helvetica", Font.PLAIN, 12));

    // Initialize textarea
    add(textarea = new java.awt.TextArea());
    textarea.setBackground(new Color(0xd3ceac));
    textarea.setForeground(new Color(0x000000));
    textarea.move(0, 200);
    textarea.resize(515, 100);
    textarea.show(true);

    // Initialize label0
    add(label0 = new java.awt.Label());
    label0.setText("Translation");
    label0.setBackground(new Color(0xbdb9a3));
    label0.setForeground(new Color(0x000000));
    label0.move(31, 86);
    label0.resize(70, 25);
    label0.show(true);

    // Initialize label1
    add(label1 = new java.awt.Label());
    label1.setText("Rotation");
    label1.setBackground(new Color(0xbdb9a3));
    label1.setForeground(new Color(0x000000));
    label1.move(31, 114);
    label1.resize(70, 25);
    label1.show(true);

    // Initialize label2
    add(label2 = new java.awt.Label());
    label2.setText("Scale");
    label2.setBackground(new Color(0xbdb9a3));
    label2.setForeground(new Color(0x000000));
    label2.move(31, 142);
    label2.resize(70, 25);
    label2.show(true);

    // Initialize label3
    add(label3 = new java.awt.Label());
    label3.setText("Color(R,G,B)");
    label3.setBackground(new Color(0xbdb9a3));
    label3.setForeground(new Color(0x000000));
    label3.move(31, 170);
    label3.resize(70, 25);
    label3.show(true);

    // Initialize label4
    add(label4 = new java.awt.Label());
    label4.setText("X");
    label4.setAlignment(1);
    label4.setBackground(new Color(0xbdb9a3));
    label4.setForeground(new Color(0x000000));
    label4.move(114, 61);
    label4.resize(88, 25);
    label4.show(true);

    // Initialize label5
    add(label5 = new java.awt.Label());
    label5.setText("Y");
    label5.setAlignment(1);
    label5.setBackground(new Color(0xbdb9a3));
    label5.setForeground(new Color(0x000000));
    label5.move(228, 61);
    label5.resize(88, 25);
    label5.show(true);

    // Initialize label6
    add(label6 = new java.awt.Label());
    label6.setText("Z");
    label6.setAlignment(1);
    label6.setBackground(new Color(0xbdb9a3));
    label6.setForeground(new Color(0x000000));
    label6.move(344, 61);
    label6.resize(88, 25);
    label6.show(true);

    // Initialize transx
    add(transx = new java.awt.Scrollbar(Scrollbar.HORIZONTAL, transformRange / 2, 1, 0, 40));
    transx.move(114, 88);
    transx.resize(88, 20);
    transx.show(true);

    // Initialize transy
    add(transy = new java.awt.Scrollbar(Scrollbar.HORIZONTAL, transformRange / 2, 1, 0, 40));
    transy.move(228, 88);
    transy.resize(88, 20);
    transy.show(true);

    // Initialize transz
    add(transz = new java.awt.Scrollbar(Scrollbar.HORIZONTAL, transformRange / 2, 1, 0, 40));
    transz.move(344, 88);
    transz.resize(88, 20);
    transz.show(true);

    // Initialize rotx
    add(rotx = new java.awt.Scrollbar(Scrollbar.HORIZONTAL, 0, 1, 0, 360));
    rotx.move(114, 116);
    rotx.resize(88, 20);
    rotx.show(true);

    // Initialize roty
    add(roty = new java.awt.Scrollbar(Scrollbar.HORIZONTAL, 0, 1, 0, 360));
    roty.move(228, 116);
    roty.resize(88, 20);
    roty.show(true);

    // Initialize rotz
    add(rotz = new java.awt.Scrollbar(Scrollbar.HORIZONTAL, 0, 1, 0, 360));
    rotz.move(344, 116);
    rotz.resize(88, 20);
    rotz.show(true);

    // Initialize scalex
    add(scalex = new java.awt.Scrollbar(Scrollbar.HORIZONTAL, 10, 1, 1, 100));
    scalex.move(114, 144);
    scalex.resize(88, 20);
    scalex.show(true);

    // Initialize scaley
    add(scaley = new java.awt.Scrollbar(Scrollbar.HORIZONTAL, 10, 1, 1, 100));
    scaley.move(228, 144);
    scaley.resize(88, 20);
    scaley.show(true);

    // Initialize scalez
    add(scalez = new java.awt.Scrollbar(Scrollbar.HORIZONTAL, 10, 1, 1, 100));
    scalez.move(344, 144);
    scalez.resize(88, 20);
    scalez.show(true);

    // Initialize colr
    add(colr = new java.awt.Scrollbar(Scrollbar.HORIZONTAL, 0, 1, 0, 255));
    colr.move(114, 172);
    colr.resize(88, 20);
    colr.show(true);

    // Initialize colg
    add(colg = new java.awt.Scrollbar(Scrollbar.HORIZONTAL, 0, 1, 0, 255));
    colg.move(228, 172);
    colg.resize(88, 20);
    colg.show(true);

    // Initialize colb
    add(colb= new java.awt.Scrollbar(Scrollbar.HORIZONTAL, 0, 1, 0, 255));
    colb.move(344, 172);
    colb.resize(88, 20);
    colb.show(true);

    // Initialize buttonCube
    add(buttonCube = new java.awt.Button());
    buttonCube.setLabel("New Cube");
    buttonCube.setBackground(new Color(0xd3ceac));
    buttonCube.setForeground(new Color(0x000000));
    buttonCube.move(3, 1);
    buttonCube.resize(100, 50);
    buttonCube.show(true);

    // Initialize buttonSphere
    add(buttonSphere = new java.awt.Button());
    buttonSphere.setLabel("New Sphere");
    buttonSphere.setBackground(new Color(0xd3ceac));
    buttonSphere.setForeground(new Color(0x000000));
    buttonSphere.move(148, 1);
    buttonSphere.resize(100, 50);
    buttonSphere.show(true);

    // Initialize buttonCone
    add(buttonCone = new java.awt.Button());
    buttonCone.setLabel("New Cone");
    buttonCone.setBackground(new Color(0xd3ceac));
    buttonCone.setForeground(new Color(0x000000));
    buttonCone.move(293, 1);
    buttonCone.resize(100, 50);
    buttonCone.show(true);

    // Initialize buttonCylinder
    add(buttonSphere = new java.awt.Button());
    buttonSphere.setLabel("New Cylinder");
    buttonSphere.setBackground(new Color(0xd3ceac));
    buttonSphere.setForeground(new Color(0x000000));
    buttonSphere.move(438, 1);
    buttonSphere.resize(100, 50);
    buttonSphere.show(true);

    // Initialize buttonVRML
    add(buttonCone = new java.awt.Button());
    buttonCone.setLabel("VRML code");
    buttonCone.setBackground(new Color(0xd3ceac));
    buttonCone.setForeground(new Color(0x000000));
    buttonCone.move(496, 100);
    buttonCone.resize(100, 50);
    buttonCone.show(true);

  }

  public Browser getBrowser() {
    return browser;
  }

  public boolean handleEvent(Event event) {
    if (event.target instanceof Scrollbar)
      {
	if (curClump == null)
	  return true;

	// Depends on which scrollbar changed.
	Scrollbar bar = (Scrollbar) event.target;

	if ((bar == transx) ||
	    (bar == transy) ||
	    (bar == transz))
	  {
	    float[] val = new float[3];
	    // Center about origin
	    val[0] = (float) transx.getValue() - (float) transformRange / 2.0f;
	    val[1] = (float) transy.getValue() - (float) transformRange / 2.0f;
	    val[2] = (float) transz.getValue() - (float) transformRange / 2.0f;
          textarea.setText(textarea.getText() + "Set translation for current object x:"+val[0]+", y:"+val[1]+", z:"+val[2]+"\n");
	    curClump.set_translation.setValue(val);
	  }

	if ((bar == scalex) ||
	    (bar == scaley) ||
	    (bar == scalez))
	  {
	    float[] val = new float[3];
	    // Center about origin
	    val[0] = ((float) scalex.getValue()) / 10.0f;
	    val[1] = ((float) scaley.getValue()) / 10.0f;
	    val[2] = ((float) scalez.getValue()) / 10.0f;
          textarea.setText(textarea.getText() + "Set scale for current object x:"+val[0]+", y:"+val[1]+", z:"+val[2]+"\n");
	    curClump.set_scale.setValue(val);
	  }

	if ((bar == colr) ||
	    (bar == colg) ||
	    (bar == colb))
	  {
	    float[] val = new float[3];
	    // Center about origin
	    val[0] = (float) colr.getValue() / 255.0f;
	    val[1] = (float) colg.getValue() / 255.0f;
	    val[2] = (float) colb.getValue() / 255.0f;
          textarea.setText(textarea.getText() + "Set color for current object x (or Red):"+val[0]+", y (or Green):"+val[1]+", z (or Blue):"+val[2]+"\n");
	    curClump.set_diffuseColor.setValue(val);
	  }

	if ((bar == rotx) ||
	    (bar == roty) ||
	    (bar == rotz))
	  {
	    curClump.xang = rotx.getValue();
	    curClump.yang = roty.getValue();
	    curClump.zang = rotz.getValue();

	    VbRotation xrot = new VbRotation(new VbVec3f(1.0f, 0.0f, 0.0f),
					     (float) curClump.xang *
					     (float) (Math.PI / 180.0));
	    VbRotation yrot = new VbRotation(new VbVec3f(0.0f, 1.0f, 0.0f),
					     (float) curClump.yang *
					     (float) (Math.PI / 180.0));
	    VbRotation zrot = new VbRotation(new VbVec3f(0.0f, 0.0f, 1.0f),
					     (float) curClump.zang *
					     (float) (Math.PI / 180.0));

	    VbRotation r1 = xrot.times(yrot);
	    VbRotation r2 = r1.times(zrot);

	    VbVec3f axis = new VbVec3f();
	    float angle = r2.getValue(axis);
	    float[] val = new float[4];
	    float[] axisVal = axis.getValue();
	    val[0] = axisVal[0];
	    val[1] = axisVal[1];
	    val[2] = axisVal[2];
	    val[3] = angle;
          textarea.setText(textarea.getText() + "Set rotation for current object x:"+val[0]+", y:"+val[1]+", z:"+val[2]+"\n");
	    curClump.set_rotation.setValue(val);
	  }

	return true;
      }
    return super.handleEvent(event);
  }    

  public boolean action(Event event, Object what) {
    if (event.target instanceof Button)
      {
	TinyClump newClump = null;

	Button b = (Button) event.target;
	if (b.getLabel() == "New Cube") {
	  newClump = new TinyClump(this, TinyClump.CUBE);
        textarea.setText(textarea.getText() + "Create a new Cube\n");
	}

	if (b.getLabel() == "New Sphere") {
	  newClump = new TinyClump(this, TinyClump.SPHERE);
        textarea.setText(textarea.getText() + "Create a new Sphere\n");
	}

	if (b.getLabel() == "New Cone") {
	  newClump = new TinyClump(this, TinyClump.CONE);
        textarea.setText(textarea.getText() + "Create a new Cone\n");
	}

	if (b.getLabel() == "New Cylinder") {
	  newClump = new TinyClump(this, TinyClump.CYLINDER);
        textarea.setText(textarea.getText() + "Create a new Cylinder\n");
	}

	if (b.getLabel() == "VRML code") {
        if (curClump != null) {
          textarea.setText(textarea.getText() + new VRMLExtractor(this.browser).toString());
        }
      }

	// Add this clump to the end of the vector.
	// We really only do this to protect our clumps
	// from Java's garbage collector
	clumps.addElement(newClump);
	// Increment the index of the high element
	topIndex++;

	// Initialize slider's values from this clump
	curClump = newClump;
	initSlidersFromClump();

	// Add clump to the scene graph
	try {
	  EventInMFNode addChildren = 
	    (EventInMFNode) root.getEventIn("addChildren");
	  addChildren.setValue(curClump.transArray);
	}
	catch (InvalidEventInException e) {
	  System.out.println("PROBLEMS!: " + e);
	}
      }
   
    // All other actions ignored.
    return true;
  }

  // Make a given clump the one we're editing
  public void makeCurrent(TinyClump which) {
    curClump = which;
    initSlidersFromClump();
  }

  void initSlidersFromClump() {
    float[] val = curClump.scale_changed.getValue();
    scalex.setValue((int) (val[0] * 10.0f));
    scaley.setValue((int) (val[1] * 10.0f));
    scalez.setValue((int) (val[2] * 10.0f));

    val = curClump.translation_changed.getValue();
    transx.setValue((int) val[0] + (transformRange / 2));
    transy.setValue((int) val[1] + (transformRange / 2));
    transz.setValue((int) val[2] + (transformRange / 2));

    val = curClump.diffuseColor_changed.getValue();
    colr.setValue((int) (val[0] * 255.0f));
    colg.setValue((int) (val[1] * 255.0f));
    colb.setValue((int) (val[2] * 255.0f));

    rotx.setValue(curClump.xang);
    roty.setValue(curClump.yang);
    rotz.setValue(curClump.zang);
  }
}