直线绘制方法之“线随鼠动”

// 功能：在给定影片上，根据起止点坐标画直线
function drawLine(drawingTable_mc:MovieClip, startPointX:Number, startPointY:Number, endPointX:Number, endPointY:Number, lineStyle_array:Array) {
with (drawingTable_mc) {
// 设置线型
lineStyle(lineStyle_array[0], lineStyle_array[1], lineStyle_array[2]);
// 设置起点、终点
moveTo(startPointX, startPointY);
lineTo(endPointX, endPointY);
}
}
//
// 舞台中心点坐标
var centerPointX:Number = Stage.width / 2;
var centerPointY:Number = Stage.height / 2;
// 设置基层，相对于_root而言，0-9作为预留层
var BASE_LAYER:Number = 10;
// 创建绘图板
var temporary_mc:MovieClip = _root.createEmptyMovieClip("drawingTable", BASE_LAYER);
// 初始化计数器
var counter:Number = 0;
// 设置自动绘制的线条总数
var LINE_TOTAL:Number = 10;
// 初始化起点坐标数组
var startPointX_array:Array = new Array();
var startPointY_array:Array = new Array();
// 初始化线形数组
var lineStyle_array:Array = new Array();
// 自动画线
temporary_mc.onEnterFrame = function() {
// 将各个线段的起点坐标、线型参数保存至相应的数组中
var lineNumber:Number = startPointX_array.push(random(Stage.width));
startPointY_array.push(random(Stage.height));
//:NOTE: 这里是数组嵌套
lineStyle_array.push([random(10), random(0xffffff), random(50) + 51]);
// 调用画线函数，并传入相应参数
drawLine(temporary_mc, centerPointX, centerPointY, startPointX_array[lineNumber - 1], startPointY_array[lineNumber - 1], lineStyle_array[lineNumber - 1]);
counter++;
if (counter == LINE_TOTAL) {
//trace(startPointX_array.length);
delete this.onEnterFrame;
}
};
// 创建鼠标侦听器
mouseListener = new Object();
// 设置侦听事件及其处理函数
mouseListener.onMouseMove = function() {
temporary_mc.clear();
for (var i = 0; i <= LINE_TOTAL; i++) {
drawLine(temporary_mc, _root._xmouse, _root._ymouse, startPointX_array[i], startPointY_array[i], lineStyle_array[i]);
}
updateAfterEvent();
};
// 为鼠标添加侦听器
Mouse.addListener(mouseListener);