用Flash AS实现画图的详细讲解

createEmptyMovieClip("line", n);
with (line) {
  for (n=1; n<400; n++) {
    a = 50*Math.cos(n*Math.PI/180);
    b = 50*Math.sin(n*Math.PI/180);
    c = 50*Math.cos((n+1)*Math.PI/180);
    d = 50*Math.sin((n+1)*Math.PI/180);
    lineStyle(0.01, 0x000000, 50);
    moveTo(a+50, b+50);
    lineTo(c+50, d+50);
    }
    line._visible = 0;
}
_root.onMouseDown = function() {
  qidian_x = _root._xmouse;
  qidian_y = _root._ymouse;
  with (line) {
  _x = qidian_x;
  _y = qidian_y;
  _xscale = 0;
  _yscale = 0;
  _visible = 1;
  }
};
_root.onMouseMove = function() {
  endX = _root._xmouse;
  endY = _root._ymouse;
  if (_root.line != "_root.line" && key.isdown(16)){
    if (Math.abs(endX-qidian_x)>Math.abs(endY-qidian_y)){
      setProperty(_root.line,_xscale, endX-qidian_x);
      setProperty(_root.line,_yscale, endX-qidian_x);
    } else {
       setProperty(_root.line,_xscale, endY-qidian_y);
      setProperty(_root.line,_yscale, endY-qidian_y);
    }
  } else {
      setProperty(_root.line, _xscale,endX-qidian_x);
      setProperty(_root.line, _yscale, endY-qidian_y);
    }
};
_root.onMouseUp = function() {
  if (_root._xmouse-qidian_x != 0) {
    i++;
    Objectx = "Copy" add i;
    duplicateMovieClip(_root.line,Objectx, i);
    setProperty(Objectx, _x, qidian_x);
    setProperty(Objectx, _y, qidian_y);
    _root.i = i;
    }
  setProperty(_root.line, _visible, 0);
};

两定点画虚线

代码：

MovieClip.
prototype.dashTo = function(startPoint,
 destPoint, dashLength, spaceLength) {
  var x = destPoint.x-startPoint.x; 
  var y = destPoint.y-startPoint.y;         
  var hyp = Math.sqrt((x)*(x)+(y)*(y)); 
  var units = hyp/(dashLength+spaceLength);              
  var dashSpaceRatio = dashLength/
(dashLength+spaceLength); 
  var dashX = (x/units)*dashSpaceRatio; 
  var spaceX = (x/units)-dashX; 
  var dashY = (y/units)*dashSpaceRatio; 
  var spaceY = (y/units)-dashY; 
  this.moveTo(startPoint.x, startPoint.y); 
  while (hyp>0) { 
    startPoint.x += dashX; 
    startPoint.y += dashY; 
    hyp -= dashLength; 
    if (hyp<0) { 
      startPoint.x = destPoint.x; 
      startPoint.y = destPoint.y; 
      } 
  this.lineTo(startPoint.x,startPoint.y); 
  startPoint.x += spaceX; 
  startPoint.y += spaceY; 
  this.moveTo(startPoint.x,startPoint.y); 
  hyp -= spaceLength; 
  } 
  this.moveTo(destPoint.x, destPoint.y); 
}; 
createEmptyMovieClip("DrawingSpace", 1); 
with (DrawingSpace) { 
  lineStyle(0, 0x000000, 100); 
  dashTo({x:300, y:0}, {x:0, y:400}, 3, 10); 
}

从一点到另一点画虚线

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