diag45_V1

def diag45(pict,x,y,c):
#@param pict: Picture
#@param x: int
#@param y: int
#@param c: color

  w,h = getWidth(pict)-1, getHeight(pict)-1
  if x<0 or x>=w or y<0 or y>=h:
    return

  else:
    diffx = w-x
    diffy = h-y
    x1 = w
    y1 = h
    if diffy>diffx:
      y1 -= (diffy-diffx)

    elif diffx>diffy:
      x1 -= (diffx-diffy)

    else:
      pass


  addLine(pict,x,y,x1,y1,c)