个回答

• 慕仔8415870

  2020-04-27 08:53:50

  halo.JS

  haloObj.prototype.born=function(x,y)

  {

  for(var i=0;i<this.num;i++)

  {

  if(!this.alive[i])

  {

  this.x[i]=x;

  this.y[i]=y;

  this.r[i]=10;

  this.alive[i]=true;

  
  

  }

  }

  }

  代码遗落了一个        “ ！”字符

  if(!this.alive[i])           加上就好了“ ！”字符

  0

• vanish_

  2017-01-26 11:56:26

  已解决，忘记改成初始化this.alive[i] == true

  0

• vanish_

  2017-01-26 11:52:06

  var haloObj = function()

  {

  this.x = [];

  this.y = [];

  this.alive = [];

  this.r = [];

  }

  haloObj.prototype.num = 5;

  haloObj.prototype.init = function()

  {

  for (var i = 0; i < this.num; i++)

  {

  this.x[i] = 0;

  this.y[i] = 0;

  this.alive[i] = false;

  this.r[i] = 0;

  }

  }

  haloObj.prototype.draw = function()

  {

  ctx1.save();

  ctx1.lineWidth = 2;

  ctx1.shadowBlur = 10;

  ctx1.shadowColor = "rgba(123,123,123,1)";

  for (var i = 0; i < this.num ;i++)

  {

  if (this.alive[i])

  {

  alert("123");

  this.r[i] += deltaTime * 0.05;

  if (this.r[i] > 100)

  {

  this.alive[i] = false;

  break;

  }

  var alpha = 1 - this.r[i] / 100;

  
  

  ctx1.beginPath();

  ctx1.arc(this.x[i], this.y[i], this.r[i], 0 , Math.PI *2);

  ctx1.closePath();

  ctx1.strokeStyle = "rgba(123,123,123,"+ alpha +")";

  ctx1.stroke();

  }

  }

  ctx1.restore();

  }

  haloObj.prototype.born = function(x, y)

  {

  for (var i = 0; i < this.num; i++)

  {

  if (this.alive[i])

  {

  this.x[i] = x;

  this.y[i] = y;

  this.r[i] = 10;

  this.alive[i] = true; 

  return;

  }

  }

  }

  
  

  0

• 尐调_

  2016-07-04 22:13:00

  这位同学，能把代码贴出来看一下吗？  

  0