mix method

void mix (Vector4 min, Vector4 max, double a, Vector4 result)

Interpolate between min and max with the amount of a using a linear interpolation and store the values in result.

Implementation 

static void mix(Vector4 min, Vector4 max, double a, Vector4 result) {
  result
    ..x = min.x + a * (max.x - min.x)
    ..y = min.y + a * (max.y - min.y)
    ..z = min.z + a * (max.z - min.z)
    ..w = min.w + a * (max.w - min.w);
}