[AS功能代码教程06] AS绘图总结及补充

本次课程，对之前学过的画线方法给予总结，同时再加以补充

总结：

圆：

_root.createEmptyMovieClip("MC",1);
MC._x = 200;
MC._y = 150;
var R = 60;
MC.moveTo(R*Math.cos(0),R*Math.sin(0));
MC.lineStyle(2);
for (n=1; n < 360; n++) {
　var angle = n*Math.PI/180;
　var tox = R*Math.cos(angle);
　var toy = R*Math.sin(angle);
　MC.lineTo(tox,toy);
}

椭圆：

_root.createEmptyMovieClip("MC",1);
MC._x = 200;
MC._y = 150;
var W = 50;
var H = 30;
MC.moveTo(W*Math.cos(0),H*Math.sin(0));
MC.lineStyle(2);
for (n=1; n < 360; n++) {
　var angle = n*Math.PI/180;
　var tox = W*Math.cos(angle);
　var toy = H*Math.sin(angle);
　MC.lineTo(tox,toy);
}

螺旋线：

_root.createEmptyMovieClip("MC",1);
MC._x = 200;
MC._y = 150;
var R = 10;
var A = 3;
MC.moveTo(0,0);
MC.lineStyle(2);
for (n=1; n < 360; n++) {
　var angle = A*n*Math.PI/180;
　var tox = angle*R*Math.cos(angle);
　var toy = angle*R*Math.sin(angle);
　MC.lineTo(tox,toy);
}

多边型：

_root.createEmptyMovieClip("MC",1);
MC._x = 200;
MC._y = 150;
var R = 50;
var sides = 5;
var angle = (360*Math.PI/180)/sides;
var MA:Array = new Array();
for (i=0; i <= sides; i++) {
　MA[i] = i*angle;
}
MC.moveTo(R*Math.cos(MA[0]),R*Math.sin(MA[0]));
MC.lineStyle(2);
for (n=1; n <= sides; n++) {
　var tox = R*Math.cos(MA[n]);
　var toy = R*Math.sin(MA[n]);
　MC.lineTo(tox,toy);
}