Set bitmap origin to movieclip origin

Hey guys,

I'm currently making a bitmap copy of a movieclip and adding it to the screen. The problem I am having is positioning the image the same as the movieclip.

What I mean is currently I have a character which is a movie clip. The origin of the movieclip is set to the bottom middle of the character. Now when ever you copy a movieclip to a bitmap the origin is now the top right corner of the image.

I could simply use bitmap.x -= width / 2; bitmap.y += height;. But here is the next problem.

I have attached bitmaps inside the movieclip and the new bitmap takes this into account even transparent pixels (i know how to ignore these). The character movie is positioned at the middle of its feet manually so this doesn't take into account the attached bitmaps on the character. So the character could be 60px wide but 40px to the left of the origin and 20px to the right and the feet would still be on the origin. So because of this bitmap.x -= width / 2; bitmap.y += height; wont put the feet in the middle but rather place the origin at the middle of the bitmap.

Now I could simply attach the movie clip instead but for performance reasons I need it to be a bitmap.

Is there anyway to translate the origin exactly/

Sorry if this doesn't make sense. I can try re explain if need be.

You could have just set the origin to top-left from the start, and avoided all these problems, or better yet, switch to spritesheet.

But well, you can try translating the bitmap using a matrix by the amount of difference of the width/height to the coordinates of the origin of the mc.

Yeah I know. It's just that having the orgin there seems to make more sense calcs wise in the game for collisions. As for the sprite sheet, that was always an option but animating the different items seems to be over kill for one person :)

I figured I would have to use the matrix. I still barely know how it works. I had to use it to copy the image in the first place but that was a fluke :)

I'll have a play around and see if I can get it working.

Thanks

OK I'm still stuck.

Here is the code I am using to copy the movie clip as a bitmap and add it to the stage.

PHP Code:

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var bounds:Rectangle = mc.getBounds(mc); //Never did understand why you had to pass itself as a parameter

var bitmapData:BitmapData = new BitmapData(bounds.width, bounds.height, true, 0x00000000);

bitmapData.draw(mc, new Matrix(1,0,0,1, -bounds.x, -bounds.y), null, null, null, ture);

var bitmap:Bitmap = new Bitmap(bitmapData);

addChild(bitmap); 


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As far as I can tell the matrix is only used to copy the mc and not its end position when placed inside the movieclip.

So are you saying to use another matrix on the copied bitmap? I'm not really sure how to do and work out the right points.

Doush, I am sorry but I can't help much here, but for one thing, if you use the matrix that way, it might compress your code, but it will in the end only confuse you. use the normal way:
var mat:Matrix = new Matrix();
mat.translate(0,-1);
mat.scale(.............. e.t.c


In my own game engine I am using a spritesheet and am using an external XML to parse it and deal with different sizes of the tiles(and coordinates), I haven't really thought of doing it how you are trying to do, so I have no idea about the actual solution in your case. I will play around with this later and try to figure something out......

Its all good bluemagica, thanks for trying. I would have done it the spritesheet way but animation each attached item would have taken me ages. So I decided on a simpler way for me.

I'll try work out a way to do it :) Thanks again for your help