I had to make with a lighthouse-like beam of light, and this is what I came up with.
http://www.humblevoice.com/AlcabyBee/lighthouse
One thing I’d like to do - use lineGradientStyle instead of just lineStyle to make the individual rays fade from 100% to 0% opacity. When I tried to do it I just got lost in the matricies, interpolationMethods, and focalPointRatios. I couldn’t get it to do what I wanted. So if there are any lineGradientStyle gurus out there, feel free to modify this accordingly.
[FONT=Courier New][LEFT][AS]Stage.scaleMode = “noScale”;
//
import flash.filters.BlurFilter;
var blurX:Number = 8;
var blurY:Number = 8;
var quality:Number = 1;
var filter:BlurFilter = new BlurFilter(blurX, blurY, quality);
var filterArray:Array = new Array();
filterArray.push(filter);
//
import flash.filters.GlowFilter;
//
var color:Number = 0xFFFFFF;
var alpha:Number = .8;
var blurX:Number = 16;
var blurY:Number = 16;
var strength:Number = 2;
var quality:Number = 2;
var inner:Boolean = false;
var knockout:Boolean = false;
var filter:GlowFilter = new GlowFilter(color, alpha, blurX, blurY, strength, quality, inner, knockout);
//
filterArray.push(filter);
node.filters = filterArray;
// TESTING VARIABLES
_root.createEmptyMovieClip(“node”, 1);
node.filters = filterArray;
node._x = Stage.width/2;
node._y = Stage.height/2;
RAD_DEG = Math.PI/180;
main_theta = 0;
// Functions
function createBeams(tgt, r, range, spokes) {
k = 0;
for (i=0; i<360; i += 360/spokes) {
// Draw initial spokes in a circle
clip = tgt.createEmptyMovieClip(“point”+k, k);
clip._x = Math.cos(iRAD_DEG)r;
clip._y = Math.sin(iRAD_DEG)r;
tgt.lineStyle(1, 0xFFFFFF);
tgt.moveTo(0, 0);
tgt.lineTo(clip._x, clip._y);
// Assign a theta value to each clip
clip.theta = Math.asin(clip._x/range)/RAD_DEG;
k++;
}
beamInt = setInterval(beamMotion, 10, tgt, range, spokes);
}
function beamMotion(tgt, range, spokes) {
tgt.clear();
// Scale the entire spotlight
// to approximate perspective
main_theta++;
factor = Math.cos(main_thetaRAD_DEG);
tgt._xscale = tgt._yscale = 60 + (30factor);
// Move individual rays
for (i=0; i<spokes; i++) {
clip = tgt[“point”+i];
clip.theta += 1;
if (clip.theta>360) {
clip.theta -= 360;
}
clip._x = Math.sin(clip.theta*RAD_DEG)*range;
tgt.lineStyle(1,0xFFFFFF);
tgt.moveTo(0, 0);
tgt.lineTo(clip._x, clip._y);
}
updateAfterEvent();
}
createBeams(node, 40, 400, 30);
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