Vec3 to Hpr? How to extract length, H and P?

Scripting Issues
4

The following code will give you the range, heading and pitch to the object:

	def GetTarget(self, tgt, base):
		"""Calculate the relative range, abs heading and abs pitch from base to target."""

		# Get the relative coordinates of the NodePath.
		t = tgt.model.getPos(base);
		x = t.getX();
		y = t.getY();
		z = t.getZ();

		# Heading to target.
		a = math.degrees( math.atan2(y, x) ) + 90;
		if (a < 0):
			a += 360;

		# Range to target.
		r = math.sqrt( (x * x ) + (y * y) );
		r = math.sqrt( (r * r ) + (z * z) );

		# Azimuth to target.
		b = math.degrees( math.atan2(r, z) ) - 90;
		if (b < 0):
			b += 360;

		return r, a, b;