A question about Project/Intersect for a sketch

[RogerInHawaii]

I've created the main body of a rocket. The overall height of the rocket is specified by a User Parameter. That lets my change its height very easily.

I then create a sketch that I'm going to use to add some details to the rocket. One of the first things I do in the sketch is use the Project/Intersect feature to transfer the outline of the rocket in to my sketch. It does that just fine. And then I add some more lines and things for the additional items I want to add. In particular here I'm adding a cockpit to the upper left-hand side of the rocket. All well and good. The sketch looks fine, shown here with the main body of the rocket hidden., but its outline in green.

But then I decide that I want the rocket to actually be shorter, not so tall. In fact for this example I want it to be half its original height, and I make that change to the RocketOverallHeight user parameter. It does a fine job of rebuilding the rocket Body. BUT the recent sketch I had created isn't updated to that new height. In fact, it's unchanged. The outline of the rocket, which was created using the Project/Intersect operation when I was originally making the sketch, is the same outline as when I created it. I EXPECT that the Sketch should reference the NEWLY sized body of the rocket and generate the sketch accordingly. But it doesn't. It's as if what it saved was just the lines of the outline of the rocket and FORGOT that it acquired it from the specified Body.

And really, really ODD, it seems to sometime work and sometimes not.

Is there a way to FORCE the sketch to update, to again reference the rocket Body in the SIZE that it now exists, so that it gets the new outline of the rocket Body?

Or does the Sketch just not hold on to that information?

You can also see that a whole lot of the dimensions are now shown in red. I have no clue what it's indicating by that.

[davebYYPCU]

Without the file,

Best guess is that the green sketch lines are locked and not following the scale change.

Red Dimensions are broken.  So Fusion wants to change them, but can't.

A proviso - if the sketch plane is also tied to the parameter you are changing, then black or blue sketch lines are likely to update.  Nothing to do with Project Intersect, as it just can't see the body anymore.

Might help....

[RogerInHawaii]

I did nothing explicitly to "lock" those green sketch lines, the ones that resulted from the intersection of the plane with the Body of the rocket.

I have no idea what I might have done to lock them, or how to un-lock them now that they're locked.

The sketch plane is unchanged, not associated with the change in the user parameter that specifies the height of the rocket. The Body is still  there, available to re-do the intersection operation.

[jeff_strater]

@davebYYPCU is correct - green means "fixed" sketch geometry.  One way that can happen is if you used Redefine Sketch Plane.  This command turns Projected (or Intersected) geometry into Fixed geometry.  I'm surprised, though, that Fusion let you dimension fixed geometry - it should have turned that into "driven" dimensions.  But, as @davebYYPCU says, without the design, that's just a guess.  Normal "Projected" geometry should be purple, and will update when the source of the Project/Intersect changes.  If that geometry is fixed, it means it no longer has an association to the source geometry.

[davebYYPCU]

I have no idea what I might have done 

With out the file,

how do you reckon any responder can assist? If you can't describe how it happened, 

Locked is also known as Fixed / Unfix,

Edit Sketch > select articles > then the Padlock Constraint. Toggles on or off.

Redefine Sketch Plane? is about the only thing that would do it to you.

From the pics / text so far, I presume the rocket body was existing and the green sketch is not the sketch that created the body. 

Why?

Need the timeline and browser, with Edit Feature on your data.

Might help....