In Drawing - Hatch Selected Surfaces

For those who don't know, you can hatch a surface, pick the surface and RMB>Hatch/Fill.  However, this is only available for planar surfaces.  Is this idea wanting to extend the concept to non-planar surfaces, and if so, what sort of algorithm are you requesting when the surface is curved, in particular, if the xhatching is done in projection, is it important that it follow the curves of the surface so that you could apply 'HLR for hatching' if desired?

The lines should project to the drawing view, regardless of orientation. It the hatching appeared curve with the surface, it wouldn't match the table like the image below. We want to communicate to the manufacturer a particular treatment in those areas. If multiple treatments are needed, we will use several different hatch patterns. If the lines curve with the part they may be confusing to the manufacturer.  HLR is important for drawing clarity.

Thanks for the followup!  Projected (as if the contour of the surface were flat) is certainly more reasonable math as well.  However, it does conflict with the HLR part.  I'm not sure if I was clear, this is not referring to the HLR of the view geometry itself, but rather of the hatching -- is it important to be able to hatch the patches on the 'back side' of the model, having the view in Hidden Line,and see those hatches as grey?  Or is it important to have the hatched areas on the ball as shown above, but have the ball in an assembly where another part obscures half of it, and the HLR algorithm removes those patches?  To be able to do that while having the hatching not in the model's space but in a projection is ... not sure if it would be possible.  Certainly tricky.

Thanks. Yes I was a little confused over the HLR.

In these views, the rectangle is an object in the foreground.

View A hides the hatching. This is probably the best and is how we do it now, manually. This is probably a similar algorithm to hiding patches on the back side.

View B shows the hatches as hidden lines. This is not needed, and probably difficult to do.

View C shows patch through foreground object. This is not preferred and may also cause issues with the patches on the back side showing through.

I have very little programming knowledge, but it seems A would be simpler. The hatching would be calculated after the HLR is done, and added to the exposed perimeters

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With Creo4 new *.pat Hatches are possible. This is great for drawings and very useful functionnality.

But it should be greater  if it was possible in 3D models.

& of course, even better with all surfaces, not only planar surfaces....

Thanks

Fabrice

Perhaps it should be possible for Michael to change the title of this idea: suppress In Drawing....

Thanks

agree with comment here before: add this functionality in the model (part AND assembly), so that the location of the surface treatment can we shown in the model (for instance a partial paint location on a part of of a surface of an extrude feature).