Comments on: Interpolation of a Point on Quadratic Curve

By: Matt Rix

Matt Rix — Sat, 14 Feb 2009 17:39:25 +0000

Hey, thanks for this, it’s exactly what I was looking for. I know this is super old, but one note of caution: casting to Sprite on every graphics line is very very slow “Sprite(plotter_mc.parent).graphics”. It’s much better to assign the graphics object to a var, ie:

var g:Graphics = Sprite(plotter_mc.parent).graphics;

and then the rest of your lines would just be:

g.moveTo(0,0);
g.lineTo(10,10);

etc.

By: Keith H

Keith H — Sun, 01 Feb 2009 14:51:19 +0000

Kanu,

Watch out for the “>” and “<” characters. They are suppose to be “>” and “<“.
The codehighlighter accidentally converts them to html entities.

By: kanu kukreja

kanu kukreja — Sun, 01 Feb 2009 12:47:19 +0000

1084: Syntax error: expecting rightparen before semicolon.
1084: Syntax error: expecting semicolon before rightparen.
1084: Syntax error: expecting rightbrace before end of program.

getting these many errors.
Can you please share a sample file.
Thanks,
kanu

By: Keith H

Keith H — Thu, 20 Nov 2008 16:13:16 +0000

Hi dare2win,
Have you tried “Math.atan2″ method to detect angle between the points?
This returns in radians but you can multiply by “180 / Math.PI” for degree rotation.

function angleOfPoints(a:Point, b:Point):Number
{
var dx:Number = a.x-b.x;
var dy:Number = a.y-b.y;
var rad:Number = Math.atan2(dy, dx);
return rad;
}

By: dare2win

dare2win — Thu, 20 Nov 2008 15:55:03 +0000

I have an application in which I plot a graph(arbitarary graph, not fixed).While plotting the graph, I have an object on the graph which will show the direction of plotting. But while rotating at some point I am facing problem. can anyone help me out?