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【适中】AS编写的雪景

本主题由猪宝宝⌒＿⌒ 于 2008-9-24 01:07 移动

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1^F 大中小发表于 2007-9-17 16:58 只看该作者

【适中】AS编写的雪景

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AS编写的雪景

贡献一段纯AS编写的雪景代码，不需在场景中建任何实例，只需将以下代码添加到新建的Flash的时间线第1帧中就ok。如有不妥，敬请指正。

免费内容:

var sceneWidth =550;//画布宽
var sceneHeight=300;//画布高
var sideDisWidth = Stage.width/2-sceneWidth/2;
var sideDisHeight = Stage.height/2-sceneHeight/2;
var snowNum = 80; //雪花数量80，这里可以随意调
var snowSpace:MovieClip = _root.createEmptyMovieClip("room", 1);
function addMasker(){
_root.createEmptyMovieClip("masker", -2);
with (masker) {
lineStyle(1, 0xcccccc, 100);
beginFill(0x000000, 70);
moveTo(sideDisWidth, sideDisHeight);
lineTo(sideDisWidth+sceneWidth, sideDisHeight);
lineTo(sideDisWidth+sceneWidth, sideDisHeight+sceneHeight);
lineTo(sideDisWidth, sideDisHeight+sceneHeight);
lineTo(sideDisWidth, sideDisHeight);
endFill();
}
createSnow();
}

function createSnow() {
var n = 0;
while (n<snowNum) {
var snow:MovieClip = snowSpace.createEmptyMovieClip("s"+n, n);
var radius:Number = Math.random()*3;
drawSnow(snow, radius);
n++;
}
}

function drawSnow(snow:MovieClip, radius:Number) {
var p = radius*.9;
with (snow) {
colors = [0xCCCCCC, 0xFFFFFF];
alphas = [100, 100];
ratios = [0, 255];
matrix = {matrixType:"box", x:-Math.random()*2*radius, y:-Math.random()*2*radius, w : 2*radius, h:2*radius, r: (90/180)*Math.PI};
beginGradientFill("radial", colors, alphas, ratios, matrix);
curveTo(p, -p, radius, 0);
curveTo(p, p, 0, radius);
curveTo(-p, p, -radius, 0);
curveTo(-p, -p, 0, -radius);
endFill();
}
snowProperty(snow, sceneWidth, sceneHeight);
}
function snowProperty(snow, w, h) {
snow._x = sideDisWidth+Math.random()*w;
snow._y = sideDisHeight+Math.random()*h;
snow._rotation = Math.random()*120+30;
snow.stepX = Math.cos((snow._rotation*Math.PI)/180);
snow.stepY = Math.random()*2+1;
setInterval(snowFall, 30, snow);
}

function snowFall(snow) {
snow._x += snow.stepX;
snow._y += snow.stepY;
if (snow._x<sideDisWidth) {
snow._x = sideDisWidth+sceneWidth;
}
if (snow._x>sideDisWidth+sceneWidth) {
snow._x = sideDisWidth;
}
if (snow._y>sideDisHeight+sceneHeight) {
snow._y = sideDisHeight;
}
}
addMasker();