<?php 

// original code take from
// http://www.kirupa.com/developer/actionscript/rotation_center.htm
// see that tutorial for explanations of the actionscript

include("../functions/drawingfuncs.php");

ming_setScale(25.00000000);
ming_useswfversion(6);
$movie= new SWFMovie();
$movie->setDimension(400, 400);
$movie->setBackground(255, 255, 0);
$w = 400;
$h = 400;
include("../functions/mytrace.php");

$s = drawSquare(0, 0, 10, 10, .1, 0, 0, 0);

$a = new SWFSprite();
$a -> add($s);
$a -> nextframe();

$movie->addExport($a, 'redballoon');

$movie->add(new SWFAction(
"
_root.createEmptyMovieClip('theScene', 1);
theScene._x = 150;
theScene._y = 200;

focalLength = 300;

// creates a 3d point
make3DPoint = function(x,y,z){
	var point = new Object();
	point.x = x;
	point.y = y;
	point.z = z;
	return point;
};
make2DPoint = function(x, y){
	var point = new Object();
	point.x = x;
	point.y = y;
	return point;
};

Transform3DPointsTo2DPoints = function(points, axisRotations){
	var TransformedPointsArray = [];
	var sx = Math.sin(axisRotations.x);
	var cx = Math.cos(axisRotations.x);
	var sy = Math.sin(axisRotations.y);
	var cy = Math.cos(axisRotations.y);
	var sz = Math.sin(axisRotations.z);
	var cz = Math.cos(axisRotations.z);
	var x,y,z, xy,xz, yx,yz, zx,zy, scaleFactor;

	var i = points.length;
	while (i--){
		x = points[i].x;
		y = points[i].y;
		z = points[i].z;

		// rotation around x
		xy = cx*y - sx*z;
		xz = sx*y + cx*z;
		// rotation around y
		yz = cy*xz - sy*x;
		yx = sy*xz + cy*x;
		// rotation around z
		zx = cz*yx - sz*xy;
		zy = sz*yx + cz*xy;
		
		scaleFactor = focalLength/(focalLength + yz);
		x = zx*scaleFactor;
		y = zy*scaleFactor;
		z = yz;

		TransformedPointsArray[i] = make2DPoint(x, y, -z, scaleFactor);
	}
	return TransformedPointsArray;
};

function makePointsArray(i){

pointsArray = [
	make3DPoint(-i,-i,-i),
	make3DPoint(i,-i,-i),
	make3DPoint(i,-i,i),
	make3DPoint(-i,-i,i),
	make3DPoint(-i,i,-i),
	make3DPoint(i,i,-i),
	make3DPoint(i,i,i),
	make3DPoint(-i,i,i)
];
return pointsArray;
};

pointsArray = makePointsArray(75);

x_init = 0;
y_init = 0;
num_moves = 10;
half_rotation = 1.57;
speed = half_rotation/num_moves;


function reset(){
	_root.detected = false;
	cube_rotation = make3DPoint(x_init,y_init,0);
	delete _root.onEnterFrame;
};
	
function moveRight(){
	cube_rotation.y-=speed;
	if(cube_rotation.y <= (_root.ysave-half_rotation)){
		reset();
	}
};
function moveLeft(){
	cube_rotation.y+=speed;
	if(cube_rotation.y >= (_root.ysave+half_rotation)){
		reset();
	}
};
function moveDown(){
	cube_rotation.x+=speed;
	if(cube_rotation.x >= (_root.xsave+half_rotation)){
		reset();
	}
};
function moveUp(){
	cube_rotation.x-=speed;
	if(cube_rotation.x <= (_root.xsave-half_rotation)){
		reset();
	}
};

function detectKeys() {
  if (Key.isDown(Key.RIGHT)) {
	  _root.detected = true;
	  _root.ysave = cube_rotation.y;
	  _root.onEnterFrame=moveRight;
  } else if (Key.isDown(Key.LEFT)) {
	  _root.detected = true;
	  _root.ysave = cube_rotation.y;
	  _root.onEnterFrame=moveLeft;
  } else if (Key.isDown(Key.DOWN)) {
	  _root.detected = true;
	  _root.xsave = cube_rotation.x;
	  _root.onEnterFrame=moveDown;
  } else if (Key.isDown(Key.UP)) {
	  _root.detected = true;
	  _root.xsave = cube_rotation.x;
	  _root.onEnterFrame=moveUp;
  }
};

_root.detected = false;
cube_rotation = make3DPoint(x_init,y_init,0);
rotateCube = function(){
	if(!_root.detected){
	    detectKeys();
	}
	
	screenPoints= Transform3DPointsTo2DPoints(pointsArray, cube_rotation);
	
	this.clear();
	this.lineStyle(2,0x0000ff,75);
	draw3d(screenPoints, this);
};
	function draw3d(screenPoints, this){
	// top
	this.moveTo(screenPoints[0].x, screenPoints[0].y);
	this.lineTo(screenPoints[1].x, screenPoints[1].y);
	this.lineTo(screenPoints[2].x, screenPoints[2].y);
	this.lineTo(screenPoints[3].x, screenPoints[3].y);
	this.lineTo(screenPoints[0].x, screenPoints[0].y);
	// bottom
	this.moveTo(screenPoints[4].x, screenPoints[4].y);
	this.lineTo(screenPoints[5].x, screenPoints[5].y);
	this.lineTo(screenPoints[6].x, screenPoints[6].y);
	this.lineTo(screenPoints[7].x, screenPoints[7].y);
	this.lineTo(screenPoints[4].x, screenPoints[4].y);
	// connecting bottom and top
	this.moveTo(screenPoints[0].x, screenPoints[0].y);
	this.lineTo(screenPoints[4].x, screenPoints[4].y);
	this.moveTo(screenPoints[1].x, screenPoints[1].y);
	this.lineTo(screenPoints[5].x, screenPoints[5].y);
	this.moveTo(screenPoints[2].x, screenPoints[2].y);
	this.lineTo(screenPoints[6].x, screenPoints[6].y);
	this.moveTo(screenPoints[3].x, screenPoints[3].y);
	this.lineTo(screenPoints[7].x, screenPoints[7].y);
	};
theScene.onEnterFrame = rotateCube;
_root.onLoad=function(){ _root.log = ' use the arrow keys to rotate the cube '; };
"));
$movie->save("3d_keys.swf", 9);

echo "<br><a href='3d_keys.swf' target='_blank'>ahhhhhhhhh</a>";
?>