orient mc to motion direction

Published by: mike 2009-01-08

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M C Forward Motion · Forward Motion Coaching Newsletter · Forward Motion Coaching Newsletter · Forward Motion Use Auto-Orient to simulate forward motion
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Hi all,
I'm using the code bellow to move a movie clip to the mouse coordinates, wich are read on mouse down. The movieclip is facing the motion; the problem is: when it stops, it changes the rotation to increments of 45 degrees, and I would like to preserve the rotation the movieclip has during the motion. I just can't figure it out...

A Generative Model For Dynamic Canvas Motion::
File Format: PDF/Adobe Acrobat - View as HTMLThe only change in Algorithm 2 is that we orient the. direction of the .. M. C., B. UCHANAN. J. W.: Computer-. generated graphite pencil rendering of 3D
http://www.cs.utah.edu/~kaplan/npr/dyncanv/DynCanvElec.pdfHOME

Please help me if you can. Thank you!

function compDist ( fromX, fromY, toX, toY ){

DOI: 10.1126/science.279.5347.57 , 57 (1998); 279 Science et al. T ::
Sep 9, 2008 Cresswell, G. H. Cross, D. Bloor, W. J. Feast, M. C.. Petty, Thin Solid Films 210/211, . onal to the relative plate motion direction
http://www.sciencemag.org/cgi/reprint/279/5347/57.pdfHOME

SC8800/SC8800E for Stepping Motor Systems::
File Format: PDF/Adobe Acrobat - View as HTMLStep and direction signal outputs are industry standard . ORIENTAL MOTOR GENERAL CATALOG 2003/2004. C-269. Specifications C-267. Dimensions C-269
http://www.orientalmotor.com/products/pdfs/C_VEXTA/StSc8.pdfHOME

distX = toX - fromX;
distY = toY - fromY;
ret = Array(
distX,
distY
);
return ret;
}

mc._x = 0;
mc._y = 0;
mc._rotation = 0;
mc.onMouseDown = function(){
toX = _root._xmouse;
toY = _root._ymouse;
}

Flash MX 2004 -- Tweening instances, groups, and type::
If you're using a motion path, select Orient to Path to orient the Select Auto to rotate the object once in the direction requiring the least motion.
http://livedocs.adobe.com/flash/mx2004/main_7_2/00000329.htmlHOME

The American and English Encyclopaedia of Law: Supplement to the - Google Books Result::
href=http://books.google.com/books?id=SdgUAAAAYAAJ&pg=PA321&lpg=PA321&dq=orient+mc+to+motion+direction&source=web&ots=oCbbQ4YKfT&sig=Ot-hoBQcy004nuARA_8j5pE0OCI&hl=en&sa=X&oi=book_result&resnum=88&ct=result class=l onmousedown=return clk(this.href,,,res,91,)>The American and English Encyclopaedia of Law: Supplement to the - Google Books Resultby David Shephard Garland, James Cockcroft - 1898 - Law15. the defendant's motion for a commission was resisted by the plaintiff on with directions that he cause the witness to appear, and, after hearing the
http://books.google.com/books?id=SdgUAAAAYAAJ&pg=PA321&lpg=PA321&dq=orient+mc+to+motion+direction&source=web&ots=oCbbQ4YKfT&sig=Ot-hoBQcy004nuARA_8j5pE0OCI&hl=en&sa=X&oi=book_result&resnum=88&ct=resultHOME

mc.onEnterFrame = function(){
distArr = compDist(this._x, this._y, toX, toY);
angleTo = Math.atan2(distArr[1], distArr[0]);
//trace (angleTo);
angleToDegs = angleTo * 180 / Math.PI;
angleToDegs -= this._rotation;
while (angleToDegs > 180) angleToDegs -= 360;
while (angleToDegs < -180) angleToDegs += 360;
this._rotation += angleToDegs/2;
moveX = distArr[0]/2;
moveY = distArr[1]/2;
this._x += moveX;
this._y += moveY;
}

what do you mean by preserve? you don't it to pause in between _rotation's

if so use setInterval

ouh, beer =)

I think I got it working :)

basically just use the distance between the coodinates and run a check to see if they get too close, that's when flash f*cks up ;)

Thanks Eilsoe! Great example.
I owe you a beer! ;)

Thanks bombsledder for your reply.
I'll try to explain better. Let's suppose my mc is in the center of the stage. If I click in the top-left corner, the mc will go to that point, and it's rotation will be let's say 45 degrees. When the mc stops, the rotation become 0 degrees (or 90, or -45... looks like it's almost a random value). I would like the rotation to remain 45 degrees. Where do you think the problem is?
Cheers,
emu