- #1
dr.fea
- 1
- 0
When you are modelling elements like tubes, the local x-axis is defined along the tubes length.
If a unit vector for the z-axis is not applied, modelling softwares defaults to a coordinate system where the local zx-plane is parallel with the global zx-plane.
I'm not sure what that means exactly, since the zx planes obviously can't be literally parallel if the local and global x-axis isn't pointing in the same direction.
Could someone please explain? My goal is to make a transformation matrix from the default coordinate system to an arbitrary one, but since I don't see how the default one is found, I'm quite stuck..
If a unit vector for the z-axis is not applied, modelling softwares defaults to a coordinate system where the local zx-plane is parallel with the global zx-plane.
I'm not sure what that means exactly, since the zx planes obviously can't be literally parallel if the local and global x-axis isn't pointing in the same direction.
Could someone please explain? My goal is to make a transformation matrix from the default coordinate system to an arbitrary one, but since I don't see how the default one is found, I'm quite stuck..