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• 0.9.2
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• Divide.scala

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geotrellis.raster.op.local.Divide.scala Maven / Gradle / Ivy

package geotrellis.raster.op.local

import geotrellis._
import geotrellis.source._

/**
 * Divides values.
 * 
 * @note        NoData values will cause the results of this operation
 *              to be NODATA or Double.NaN.
 */
object Divide extends LocalRasterBinaryOp {
  def combine(z1:Int,z2:Int) =
    if (isNoData(z1) || isNoData(z2)) NODATA
    else if (z2 == 0) NODATA
    else z1 / z2

  def combine(z1:Double,z2:Double) =
    if (z2 == 0) Double.NaN
    else z1 / z2
}

trait DivideOpMethods[+Repr <: RasterSource] { self: Repr =>
  /** Divide each value of the raster by a constant value.*/
  def localDivide(i: Int) = self.mapOp(Divide(_, i))
  /** Divide each value of the raster by a constant value.*/
  def /(i:Int) = localDivide(i)
  /** Divide a constant value by each cell value.*/
  def localDivideValue(i:Int) = self.mapOp(Divide(i,_))
  /** Divide a constant value by each cell value.*/
  def /:(i:Int) = localDivideValue(i)
  /** Divide each value of a raster by a double constant value.*/
  def localDivide(d: Double) = self.mapOp(Divide(_, d))
  /** Divide each value of a raster by a double constant value.*/
  def /(d:Double) = localDivide(d)
  /** Divide a double constant value by each cell value.*/
  def localDivideValue(d:Double) = self.mapOp(Divide(d,_))
  /** Divide a double constant value by each cell value.*/
  def /:(d:Double) = localDivideValue(d)
  /** Divide the values of each cell in each raster. */
  def localDivide(rs:RasterSource) = self.combineOp(rs)(Divide(_,_))
  /** Divide the values of each cell in each raster. */
  def /(rs:RasterSource) = localDivide(rs)
  /** Divide the values of each cell in each raster. */
  def localDivide(rss:Seq[RasterSource]) = self.combineOp(rss)(Divide(_))
  /** Divide the values of each cell in each raster. */
  def /(rss:Seq[RasterSource]) = localDivide(rss)
}