Package net.paulem.arcana.math

Class ACosTable

java.lang.Object
net.paulem.arcana.math.ACosTable
public class ACosTable extends Object
A precomputed lookup table for Math.acos(double), used to approximate the arc cosine faster than calling Math.acos directly. Values are cached at a resolution of 0.001 over the [-1.0, 1.0] domain, so results are approximate rather than exact.

  • Method Details

    • getAcos

      public double getAcos(double x)
      Returns the approximate arc cosine of the given value, read from the precomputed table. The input is clamped to the [-1.0, 1.0] range before being rounded to the nearest cached step of 0.001.
      Parameters:
      x - the value whose arc cosine is sought; values outside [-1.0, 1.0] are clamped
      Returns:
      the approximate arc cosine of x, in radians