Inconsistencies between part files for similar primitives

[Travis Cobbs]

There's a bunch of different types of inconsistencies I've found - I won't go into all the details unless there's some positive value to the community, but as a single example the control points for the conditional lines on the ends of part "p/1-4cyli.dat" look like the green lines in this screenshot and they appear to work as intended when the model is rotated (Note: I've attached the screenshots as well in case the Imgur posts get deleted):



but the control points for the conditional lines at the ends of "p/2-4cyli.dat" look like this and don't really show the conditional outline on the end edges correctly when the model is rotated:

Neither of your images is correct, so your conclusions are also not correct. I'm not sure where you got the two endpoints for your conditional lines, but they do not match the data in the files.

The conditional lines on the edges of the n-fcyli files are set up to be tangent to the cylinder. That way if two cylinders are put next to each other, each will show its conditional line half the time. If a cylinder is placed against a plane that is tangent to the cylinder, the conditional line will appear as expected, and (more importantly), not appear when it shouldn't.

In LDView, enable conditional lines and then select "Show all" and "Show control points" to see the actual geometry.