Fully constrained ?

[Anonymous]

I have preferences, preview, sketch checked.

My understanding is that fully constrained sketch entities will change from blue to black in a sketch. Is this true ?

In the attached file, I specified the location and diameter of one of the circles and it indeed turned from blue to black and I cannot change location by dragging center point.

But, the horizontal and vertical lines starting at the origin are also black - I thought that meant fully constrained.

I can still change the length of these lines by moving the endpoints !

Will someone please explain to me what I am missing ?

Thank you.

[SaeedHamza]

Hi,

The black dimensions means that it's defined, in other words your black circle is fully constrained with 2 sides and that's why you can't move it

kind regards, Saeed

[Anonymous]

Saeed, thank you for replying.

I think I understand why I cannot move the circle by dragging (although it is black on my computer not blue as in your screenshot). In the videos I watched on youtube they talked about the entities (circle, line etc.) changing from blue to black, not the dimensions.

Be that as it may, my question is why the horizontal and vertical lines are black (not blue) indicating fully constrained.

Yet, I can still change the length of the lines by dragging the end points.

Thanks again for the reply.

[daniel_lyall]

Hi @SaeedHamza me again.

@Anonymous this is my reasoning.

One line is constrained vertically to the origin, the other one is constrained horizontal to the origin.

The reasion you can move them in their constrained direction is the lines they are attached to are not constrained and their length is not constrained by a diamention or constraint.

If you constrain their end points by putting a diamention from the origin to the end point or just on the line on one of the black lines the whole thing becomes constrained.

If you just draw a line from the origin out at a angle and put an aligned diamention on it you will be able to rotate it around the origin and that's all unless you edit the lines aligned diamention , if you add a horizontal or vertical diamention to it, the line becomes fully constrained as its lock in two directions as in a 2D line, A 3D line is a different storey.

[HughesTooling]

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@Anonymous wrote:

But, the horizontal and vertical lines starting at the origin are also black - I thought that meant fully constrained.

I can still change the length of these lines by moving the endpoints !

Will someone please explain to me what I am missing ?

Thank you.

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The problem is they are only using 2 colours so you have to infer from the other lines\points when a horizontal\vertical line is fully constrained. You'll find the line connected to the vertical will not change to black until you add a dimension to the vertical line.

In the image below the 40mm lines are fixed length and orientation but their posisions are free, you'd need to fix the length of the lines they're connected to to make them fully constrained.

There's a thread here asking for feedback on the status colouring you might want to look through.

[HughesTooling]

Sorry forgot the link in the post above.

https://forums.autodesk.com/t5/design-validate-document/notice-feedback-request-sketch-constraint-st...

[FrankCao]

Hi pasg59,

Thanks for posting this question. Actually in Fusion 360. when we say a line is fully constrained, we only means its direction is fixed. This also applies to arc. The curves will turn black when their directions are fixed. For points, they need be fixed in position to be thought as fully constrained.

Regards,

Frank

[Anonymous]

Thank you for the link.