[编程语言] 空气动力学原理,as2.0运用

空气动力学, 原理

相信未来几年内,as代会是富技术的领航``
贴一段as2.0的空气动力气源码给大家感受一个as的强大.

将下面代码粘到flash的第一帧,运行看看就看到效果了.

//******
//core graph studio
//http://spaces.msn.com/coreg
//CG 2006/3/5
//******
import flash.geom.Point;
function initBones(r:Array):Array {
var bones:Array = new Array();
for (var i = 0; i<r.length; i++) {
bones[i] = new Object();
bones[i].s_point = new Point(0, 0);
bones[i].e_point = new Point(0, r[i]);
}
return bones;
}
function setBones() {
var n = bones.length-1;
if (F.length>r[r.length-1]*2) {
F.normalize(r[r.length-1]*2);
}
var len = F.length;
while (n>=0) {
var F_angle:Number = Math.atan2(F.y, F.x);
var bone_angle:Number = Math.atan2(bones[n].e_point.y, bones[n].e_point.x);
var d_angle:Number = F_angle-bone_angle;
var f = Point.polar(F.length*Math.sin(d_angle), Math.PI/2+bone_angle);
f.x *= 0.4;
f.y *= 0.4;
var new_point = bones[n].e_point.add(f);
new_point.normalize(bones[n].e_point.length);
bones[n].e_point = new_point.clone();
//trace(n+" "+bones[n].e_point+" "+bones[n].e_point.length);
F = Point.polar(F.length*Math.cos(d_angle)*f_xishu, bone_angle);
if (F.length>r[n]*4) {
F.normalize(r[n]*4);
}
n--;
}
for (var i = 1; i<bones.length; i++) {
bones[i].s_point = bones[i-1].s_point.add(bones[i-1].e_point);
//trace(bones[i].e_point)
}
clear();
lineStyle(w[0], 0x4462EF, 50);
moveTo(bones[0].s_point.x, bones[0].s_point.y);
lineTo(bones[0].e_point.x, bones[0].e_point.y);
for (var i = 1; i<bones.length; i++) {
lineStyle(w[i], 0x4462EF, 50);
lineTo(bones[i].s_point.x+bones[i].e_point.x, bones[i].s_point.y+bones[i].e_point.y);
}
}
f_xishu = 0.95;
r = [40, 100, 80, 60, 20, 40, 50];
w = [100, 20, 25, 40, 80, 10, 5];
bones = initBones(r);
this.onEnterFrame = function() {
F = new Point(_xmouse-bones[bones.length-1].s_point.x-bones[bones.length-1].e_point.x, _ymouse-bones[bones.length-1].s_point.y-bones[bones.length-1].e_point.y);
setBones();
};
//------