[Flightgear-devel] Re: Plea for help: geometry/trigonometry problem

2004-11-03 Thread David Megginson
I've thought of a simpler way to approach this problem. Let's say that I have a plane and the three Euler angles of rotation, phi, theta, and psi (roll, pitch, and yaw). Given those three angles, I'd like to determine which direction around the z axis is most directly uphill and how steep the

Re: [Flightgear-devel] Re: Plea for help: geometry/trigonometry problem

2004-11-03 Thread Curtis L. Olson
David Megginson wrote: I've thought of a simpler way to approach this problem. Let's say that I have a plane and the three Euler angles of rotation, phi, theta, and psi (roll, pitch, and yaw). Given those three angles, I'd like to determine which direction around the z axis is most directly

Re: [Flightgear-devel] Re: Plea for help: geometry/trigonometry problem

2004-11-03 Thread Jon S Berndt
On Wed, 3 Nov 2004 14:05:59 -0500 David Megginson [EMAIL PROTECTED] wrote: I've thought of a simpler way to approach this problem. Let's say that I have a plane and the three Euler angles of rotation, phi, theta, and psi (roll, pitch, and yaw). Given those three angles, I'd like to determine

Re: [Flightgear-devel] Re: Plea for help: geometry/trigonometry problem

2004-11-03 Thread Curtis L. Olson
David Megginson wrote: I've thought of a simpler way to approach this problem. Let's say that I have a plane and the three Euler angles of rotation, phi, theta, and psi (roll, pitch, and yaw). Given those three angles, I'd like to determine which direction around the z axis is most directly

Re: [Flightgear-devel] Re: Plea for help: geometry/trigonometry problem

2004-11-03 Thread Jon S Berndt
On Wed, 03 Nov 2004 15:28:26 -0600 Curtis L. Olson [EMAIL PROTECTED] wrote: I think you're on the right track. I think you want to determine the orientation of the aircraft body Z axis w.r.t. the local vertical axis. That can tell you both the magnitude and direction of the most vertical

RE: [Flightgear-devel] Re: Plea for help: geometry/trigonometry problem

2004-11-03 Thread Norman Vine
David Megginson writes: I've thought of a simpler way to approach this problem. Let's say that I have a plane and the three Euler angles of rotation, phi, theta, and psi (roll, pitch, and yaw). Given those three angles, I'd like to determine which direction around the z axis is most