个回答

• 中午晚上吃啥

  2015-12-09 09:42:41

  
  var momObj = function(){
  
     this.x;
     this.y;
     this.angle;
     this.bigEye = new Image();
     this.bigBody = new Image();
     this.bigTail = new Image();
  }
  
  momObj.prototype.init = function(){
  
     this.x = canWidth*0.5;
     this.y = canHeight*0.5;
     this.angle = 0;
     this.bigEye.src = "./src/bigEye0.png";
     this.bigBody.src = "./src/bigSwim0.png";
     this.bigTail.src = "./src/bigTail0.png";
  }
  
  momObj.prototype.draw = function(){
  
     //lerp x,y
     this.x = lerpDistance(mx,this.x,0.98);
     this.y = lerpDistance(my,this.y,0.98);
  
     //delta angle
     //Math.atan2(y,x)
     var deltaY = my-this.y;
     var deltaX = mx-this.x;
     var beta = Math.atan2(deltaY,deltaX)+Math.PI;
  
     //lerp angle
     this.angle = lerpAngle(beta,this.angle,0.6);
  
     ctx1.save();
  
     ctx1.translate(this.x,this.y);
     ctx1.rotate(this.angle);
     ctx1.drawImage(this.bigTail,-this.bigTail.width*0.5+30,-this.bigTail.height*0.5);
     ctx1.drawImage(this.bigBody,-this.bigBody.width*0.5,-this.bigBody.height*0.5);
     ctx1.drawImage(this.bigEye,-this.bigEye.width*0.5,-this.bigEye.height*0.5);
     ctx1.restore();
  }

  0

• 慕莱坞9220042

  2015-12-08 11:54:00

  你好，把代码贴出来看看。

  0