setFromAxis method

Quat setFromAxis(
  1. Vec3 axis,
  2. double rad
)

Set Quant from this axis and angle in radians

Implementation

Quat setFromAxis(Vec3 axis, double rad) {
  axis.normalize();
  rad = rad * 0.5;
  double s = math.sin( rad );
  x = s * axis.x;
  y = s * axis.y;
  z = s * axis.z;
  w = math.cos( rad );
  return this;
}