Groovy gave me piles

If you haven’t already, make sure to read Bob’s (@Transentia) massive improvement on the code from my last post. He made a lightly veiled piece of Java code really swing to a Groovy tune! He may also have gotten a little soiled playing with my piles!

Well, using Bob’s improvements with a little touch up (for densities and angles of repose), here’s a way to find out just how hard it would be to shift the mound of building material dropped on the end of your drive! Or, at least you can say how heavy it is and get someone else to shift it :-) .

enum Material {
  CEMENT(131.0F, 45.0F),
  DRYSAND(90.0F, 41.0F),
  WETSAND(118.0F, 26.0F),
  LOOSEGRAVEL(93.0F, 50.0F),
  PACKEDGRAVEL(100.0F, 45.0F),
  CLAY(120.0F, 43.0F)

  Material(D, theta) {
    this.D = D
    this.theta = theta
  }

  def D
  def theta
}

class ConicalPile {
  def m
  def h

  def getWeightPounds() {
    def cT = Math.cos(Math.toRadians(m.theta))
    (Math.PI * h ** 3 * m.D) / (3 * (cT ** 2))
  }

  def getWeightTons() {
    getWeightPounds() / 2000.0F
  }

  @Override
  public String toString() {
    """$m
  Weight(pounds): ${String.format("%.0f", getWeightPounds())}
  Weight(tons): ${String.format("%.3f", getWeightTons())}"""
  }
}

def testHt = 10.0F
println "At pile height of "+testHt+" foot"
for (Material m : Material.values())
  println new ConicalPile(m: m, h: testHt)

which when run gives us something that looks quite reasonable

At pile height of 10.0 foot
CEMENT
  Weight(pounds): 274366
  Weight(tons): 137.183
DRYSAND
  Weight(pounds): 165467
  Weight(tons): 82.734
WETSAND
  Weight(pounds): 152964
  Weight(tons): 76.482
LOOSEGRAVEL
  Weight(pounds): 235709
  Weight(tons): 117.855
PACKEDGRAVEL
  Weight(pounds): 209440
  Weight(tons): 104.720
CLAY
  Weight(pounds): 234939
  Weight(tons): 117.469