Extrude Function Having Strange Behavior

EFish

Hi, while working on a shaft FeatureScript, some interesting behavior came up when using the extrude function (I do wish I could use the hole function). Where in certain inputs the extrude to apply the values work, but other times it doesn't. Some help would be greatly appreciated.

Document link:
TMM Featurescripts

Alex_Kempen

I see you're building a shaft generator for FRC. It might not be a bad idea to take a look at Julia's Shaft FeatureScript, which can be found here.

Since you've been pretty vague with everything, I'll stick to giving you some general advice about troubleshooting your own problems. I would start looking for problems by adding some relevant print and debug statements before any extrudes which you think are acting up. For example:

// Print some stuff!
println("roundExtrude");
debug(context, qSketchRegion(id + "startSketch"));<br>println(length);

extrude(context, id + "roundExtrude", {
                "entities" : qSketchRegion(id + "startSketch"),
                "endBound" : BoundingType.BLIND,
                "depth" : length
            });

Generic print statements (like println("roundExtrude")) can also be used to quickly check what sections of code are running. If you see one thing printed in the console when you're expecting something else, then you've found your issue.

P.S. You should consider using opExtrude and opBoolean instead of the Onshape extrude feature. They'll perform better and be easier to understand. They're also documented better.

EvanReese

Happy to help, but I think I'll need a more specific question or an example of what you mean by "interesting behavior". Maybe manually model what you want to happen, and show what's happening instead?

EFish

While using the feature, it seems to only do a through extrusion in some configurations, while only doing blind extrusions in others. But there is no errors or anything, just nothing happens, and this has really puzzled me.

Alex_Kempen

I see you're building a shaft generator for FRC. It might not be a bad idea to take a look at Julia's Shaft FeatureScript, which can be found here.

Since you've been pretty vague with everything, I'll stick to giving you some general advice about troubleshooting your own problems. I would start looking for problems by adding some relevant print and debug statements before any extrudes which you think are acting up. For example:

// Print some stuff!
println("roundExtrude");
debug(context, qSketchRegion(id + "startSketch"));<br>println(length);

extrude(context, id + "roundExtrude", {
                "entities" : qSketchRegion(id + "startSketch"),
                "endBound" : BoundingType.BLIND,
                "depth" : length
            });

Generic print statements (like println("roundExtrude")) can also be used to quickly check what sections of code are running. If you see one thing printed in the console when you're expecting something else, then you've found your issue.

P.S. You should consider using opExtrude and opBoolean instead of the Onshape extrude feature. They'll perform better and be easier to understand. They're also documented better.

EFish

Thanks for your input! I've only started using FeatureScript about 2 weeks ago so I'm still learning a lot! I'll use Julia's Shaft FeatureScript as a reference more. I've been staying away from that a little bit just cause I'd like to learn how to build the Feature myself so that I'm not copying and pasting very much.