7.2.3 冷凝器图纸输出

Talk is cheap, show me the code:

for(var i=0,len=tubeArray.length,x,y;i<len;i++){  for(var j=0;j<tubeArray[i]/2;j++){    x=x0+(isEven(tubeArray[i])/2+j)*d_tubes;    y=y0+i*d_tubes*Math.sqrt(3)/2;    y=myCanvas.height-y-50;    d.drawCircle(x, y, dt/2);  }}
var b = new Blob([d.toDxfString()], {type: 'application/dxf'});document.getElementById('dxf').href = URL.createObjectURL(b);