用Flash AS编写蝌蚪摆尾特效动画

本文中我们用Flash 的 AS代码来编写一个蝌蚪自由摆尾游动的动画。

场景里代码:

Object.environment = this;

Math.prototype.degrees = function (r)

{

return (r * 180 / 3.141593E+000);

};

maxtents = 3;

this.onEnterFrame = function ()

{

if (!random(30) && tents < maxtents)

{

var nombre = "tent" + String(depth++);

var neo = this.attachMovie("tentacle", nombre, depth);

neo._x = random(600);

neo._y = 370;

neo.theta = 270;

++tents;

} // end if

};

stop ()

MC里的代码:

#initclip 1

function TentacleClass()

{

this.numNodes = 27;

this.head = 2 + random(4);

this.girth = 8 + random(12);

this.speedCoefficient = 9.000000E-002 + random(10) / 50;

this.friction = 9.000000E-001 + random(10) / 100;

this.muscleRange = 20 + random(50);

this.muscleFreq = 1.000000E-001 + random(100) / 250;

this.generateNodes();

this.onEnterFrame = this.move;

} // End of the function

TentacleClass.prototype = new MovieClip();

TentacleClass.prototype.generateNodes = function ()

{

this.node = new Array();

var n = 0;

while (n < this.numNodes)

{

var point = {x: 0, y: 0};

this.node.push(point);

++n;

} // end while

};

TentacleClass.prototype.move = function ()

{

this.tv = this.tv + 5.000000E-001 * (Math.random() - Math.random());

this.theta = this.theta + this.tv;

this.tv = this.tv * this.friction;

this.node[0].x = this.head * Math.cos(1.745329E-002 * this.theta);

this.node[0].y = this.head * Math.sin(1.745329E-002 * this.theta);

this.count = this.count + this.muscleFreq;

this.thetaMuscle = this.muscleRange * Math.sin(this.count);

this.node[1].x = -this.head * Math.cos(1.745329E-002 * (this.theta + this.thetaMuscle));

this.node[1].y = -this.head * Math.sin(1.745329E-002 * (this.theta + this.thetaMuscle));

var i = 2;

while (i < this.numNodes)

{

var dx = this.node.x - this.node[i - 2].x;

var dy = this.node.y - this.node[i - 2].y;

var d = Math.sqrt(dx * dx + dy * dy);

this.node.x = this.node[i - 1].x + dx * this.girth / d;

this.node.y = this.node[i - 1].y + dy * this.girth / d;

if (i == 2)

{

this._x = this._x - dx * this.speedCoefficient;

this._y = this._y - dy * this.speedCoefficient;

if (this._x + this._width < 0 || this._x - this._width > 600 || this._y + this._height < 0 || this._y - this._height > 400)

{

--Object.environment.tents;

this.removeMovieClip();

} // end if

++i;

} // end while

this.clear();

this.moveTo(this.node[1].x, this.node[1].y);

var i = 2;

while (i < this.numNodes)

{

this.lineStyle(int(this.numNodes - i) * (this.numNodes - i) / 20, 16777215, 100);

this.lineTo(this.node.x, this.node.y);

++i;

} // end while

};

Object.registerClass("tentacle", TentacleClass);

#endinitclip