New Constraint - Pressure

[PrzemoF]

I'm working on Constraint Pressure using CalculiX DLOAD - preview below. The code is almost ready, but I need to fix arrows (direction, shape and location) for that constraint, before I ask for help with testing.

[DeepSOIC]

Beautiful!!

[sgrogan]

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crushacan2.FCStd

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[PrzemoF]

Arrows ready

FreeCAD_ConstraintPressure_Tank_arrows_section.jpg (353.48 KiB) Viewed 3106 times

[sgrogan]

I was going to ask about changing the color as a visual cue. It's brilliant. I will test this evening my time.
Did you change arrow color in the icon as well?

[sgrogan]

Oh, I see. The arrow color is controlled by the face color property. So I re-phrase. What to you guys think about different default colors for the different constraint types?

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crushacan3.FCStd

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[PrzemoF]

I'll change the icon colour - thanks for suggesting it! I was going to change constraints colours or add a colour picker to FEM Preferences. I'm OK with red for force, dark blue for pressure, some shade of dark grey for fixed constraint.
Edit: Also a selected constraint should change colour - right now there is no way of telling what is what.

P.S. Actually adding a colour picker to the dialog window used to define constraints should be easy as well.

Edit2: We only have to decide on the default colours - the normal way of changing colours works fine for constraints.

[bernd]

... Edit2: We only have to decide on the default colours - the normal way of changing colours works fine for constraints.

The default colours for each constraint would be best in preference not in each constraint gui.

[sgrogan]

I think fix can stay red the arrows have a base already to distinguish it from a force. How about:
red=node constraint
blue=element face constraint
green=element volume constraint

Some sort of selection indicator is another great idea.

[PrzemoF]

I think fix can stay red the arrows have a base already to distinguish it from a force. How about:
red=node constraint
blue=element face constraint
green=element volume constraint

Some sort of selection indicator is another great idea.

Sounds good, but I won't be implementing that in fixed/force constraints now. The code it too complicated for me, so for now ConstraintPressue (faces only) will be use short, blue arrows, but the rest will stay red. The next step will be to implement force input field (currently only pressure value can be specified) and a text field showing information about area of the selected face to allow selecting force or pressure and auto calculate the other value using the area.

The Pressure constraint is ready for testing: https://github.com/PrzemoF/FreeCAD_sf_m ... ressure_v2