com.io7m.jtensors.core/src/main/java/com/io7m/jtensors/core/dotproducts/DotProductsDouble.java
public static double dotProduct4(
    final double x0,
    final double y0,
    final double z0,
    final double w0,
    final double x1,
    final double y1,
    final double z1,
    final double w1)
  {
    final double x = x0 * x1;
    final double y = y0 * y1;
    final double z = z0 * z1;
    final double w = w0 * w1;
    return x + y + z + w;
  }
public static double dotProduct4(
    final double x0,
    final double y0,
    final double z0,
    final double w0,
    final double x1,
    final double y1,
    final double z1,
    final double w1)
  {
    final double x = x0 * x1;
    final double y = y0 * y1;
    final double z = z0 * z1;
    final double w = w0 * w1;
    return x + y + z + w;
  }
Calculate the dot product of
{@code (x0, y0, z0, w0)} and {@code (x1, y1, z1, w1)}.

@param x0 The X component of the first vector
@param y0 The Y component of the first vector
@param z0 The Z component of the first vector
@param w0 The W component of the first vector
@param x1 The X component of the second vector
@param y1 The Y component of the second vector
@param z1 The Z component of the second vector
@param w1 The W component of the second vector

@return The dot product