GSoC Week 3 recap

Kurt Kremitzki

2017-06-22 11:15

Howdy! I wasn't sure of the best way to represent my progress thus far, but I figure a table is an alright way to summarize.

tool category	initial, current test count	status	notes
datum tools	0, 0	hold	waiting on attachment editor work in phase 2
add. & sub. features/primitives	3, 11	blocked	basic Pipe not working; when fixed, all tools in this category (but not all their options) will have test coverage
transformations	0, 3	ready	Mirrored added, still need Linear and PolarPattern
dressup features	0, 0	ready
boolean operation	0, 0	ready	Previously seemed to misbehave but recent changes to containers may have fixed this

I got my Pad & Pocket tests added, so right now the total Δtests is 11. Next up is Loft and Pipe. However, Pipe has a bit of a blocking bug right now. My test scenario involves a simple circle centered at the origin in an XY-attached sketch, serving as the base Profile, and a simple line on the Z axis in an XZ-attached sketch. The test construction is illustrated in figure 1.

This should result in a cylinder, as the preview indicates in figure 2. For some reason, when clicking OK, an external reference warning is being generated, and this is blocking any test constructions for PartDesign Pipe.

Figure 1. PartDesign Pipe Profile and Spine sketches which should form a simple cylinder.

Figure 2. PartDesign Pipe erroneously warning about external references.

I also ran into a bug in PartDesign Revolve, which, as bugs are wont to do, ended up being two bugs. The construction case to see them is depicted in figure 3.

Figure 3. Simple sketches attached to the three base planes.

I attached a simple circle sketch to each of the three base planes, and offset them so they wouldn't be symmetric with respect to the origin or any base axes. When attempting to add a Revolution with these sketches, they behave as expected, until one attempts to revolve them about the axis which is normal to the sketch's plane. For the XY- and YZ-attached sketches, the following error appears:

Unhandled Base::Exception caught in GUIApplication::notify. The error message is: Rotation axis must not be perpendicular with the sketch plane

However, if one tries to revolve the XZ-attached circle, FreeCAD gives it the ol' college try, but ends up with an awfully thin "solid":

Figure 4. An "error-free" PartDesign Revolution.

I'll also be looking into these bugs this week.

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