Recent content by domls

No, that is the bottom coordinate of the pipe. I can easily compute the RP (radius point) or center of the pipe given the inclination and azimuth. Thanks.

Thanks for your help. I do know how to work with matrices. Over the years, as a registered professional land surveyor and programmer since 1983, I have developed many subroutines that are used to multiply, add, subtract, transpose, etc, matrices. I have developed least squares subroutines...

Yes, I agree. However the formula is the question. What formulas would you use to perform the rotation? domls

Thanks for your reply! I'm not sure about my formulas for the rotation. One website had the rotation about the z axis as being x'=x cos q - y sin q, y'= x sin q + y cos q, and z'=z. But I question that z'=z. I also found a web solution that talks about the general case of rotation about an...

Hello to all...first post here! I need to compute 3D (x,y,z) points around the surface of a pipe. By pipe I mean something like an underground pipeline. Let's say I'm given the bottom point of the pipe in x,y,z coordinates, the diameter of the pipe (say 12 feet), and the inclination or...