个回答

• qq_陌末_0

  2016-05-15 05:12:40

  momObj.prototype.draw = function()

  {

  //console.log(this.x);

  this.x = lerpDistance(mx,this.x,0.9);

  this.y = lerpDistance(my,this.y,0.9);

  //delta angle

  var deltaY = my - this.y;

  var deltaX = mx - this.x;

  var beta = Math.atan2(deltaY,deltaX) + Math.PI;

  
  

  this.angle = lerpAngle(beta,this.angle,0.9) ;

  
  

  ctx1.save();

  ctx1.translate(this.x,this.y);

  ctx1.rotate(this.angle);

  ctx1.drawImage(this.eye,-this.eye.width*0.5,-this.eye.height*0.5);

  ctx1.drawImage(this.tail,-this.tail.width*0.5+30,-this.tail.height*0.5);

  ctx1.drawImage(this.body,-this.body.width*0.5,-this.body.height*0.5);

  ctx1.restore();

  }

  
  

  注意画大鱼眼睛，身体，尾巴的坐标，因为这个时候已经用了translate换了坐标

  0

• chanchan6666

  2016-03-06 15:44:10

  我的也是，而且鱼和鼠标还越来越远了

  0

• hoenybee

  2016-01-26 17:23:16

  beta加一个PI把角度反过来
  

  0