Rotation and movement in AS3 [closed] - actionscript-3

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I want to make a minigame where the background (maze) is always rotating around the same point, an immovable playerMC that's in the middle of the stage. To get the rotation I am using two MCs, one parent, that I rotate, and one nested maze that I would like to move according to mouse/keyboard movement
Unfortunately, the x and y axes on the maze are moved so at 90deg any movement 'up' will change to 'right'.
I do realise sin and cos or translation matrix should do the trick, but for some reason I can't get it right.
Here is a short gif summarising my problem: http://blackdragonschronicles.strefa.pl/Public/Vertigo.gif
I would greatly appreciate any help in the matter

Answer 1

You could use a Matrix which solves this pretty nicely.
In my small example I have an movieclip called box sitting on the stage. Its pivot is in the top left corner (0,0). If I want to rotate the cube from the center I would first translate the matrix by half of its width and height. I then rotate it by some arbitrary angle, and finally apply the matrix transformation to my box.
var angle:Number = Math.PI/64;
var m:Matrix = new Matrix();
m.translate(-box.width >> 1, -box.height >> 1);
stage.addEventListener(Event.ENTER_FRAME, loop);
function loop(e:Event):void {
m.rotate(angle);
box.transform.matrix = m;
}
In the same spirit you could translate a matrix with your current world position. And rotate around that point.
m.translate(position.x, position.y);
You can learn more about Matrices in AS3 here.

Answer 2

Thanks to the link you provided, Iggy, I've managed to understand what and how I want to do it. I used an additional method that was made for situations like this. Here's the code
import flash.events.Event;
import flash.geom.Matrix;
import fl.motion.MatrixTransformer;
addEventListener(Event.ENTER_FRAME,eF);
//Set rotation pivot
var RotationAt:Point = new Point(player.x,player.y);
//Center the MC at the player/pivot
mc.x = player.x
mc.y = player.y
function eF(e:Event){
var my_matrix = mc.transform.matrix;//needs to be refreshed all the time
MatrixTransformer.rotateAroundExternalPoint(my_matrix,player.x,player.y,1);
mc.transform.matrix = my_matrix; // changes the rotation
}
Later I just needed to add code for ading/subtracting x and y with the mouse current position.
Thank you!