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。效果查看:
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 } // 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 |