You're a great teacher Matt, you should work for SolidWorks writing tutorials, and they should pay you mad money to do it!
I was getting very frusterated, and I started re-reading what you have told me and suddenly after repeated trial and error started having absolute success, and understand what was occuring within the relations. Mainly it was the Wrap that was messing me up.
Using the Offset Entities I figured out a way to even bring out the edge I was having problems with on the goggle Wrap Feature. Got it onto a 2d plane, and it is still fully defined, and seperated from the goggles as its own sketch!
Rev A Offset front view 2.jpg
I started a 3d sketch, and holding shift selected the 3d profile ( of the goggles, then applied the offset at 0.9in, and since I was doing this in the front view, as you said, it plotted onto a 2d plane. Works perfectly how I planned it, now the upper midpoint of my new offset profile is level with the construction line relating it to my right view profile for the 'brow'.
So, to record what I did to get this:
1) I need to use a 2D profile to wrap which is much wider than the goggles. When wrapped this profile was tailored to fit the way I needed. It stayed fully defined when I wrapped it to the extruded surface representing the 'top down' curvature. Under the surfaces tab I used Delete Face to delete the rest of the extruded surface around the 3D goggle surface. (Note I did a reverse thicken on the lens, maintianing my surface as the exterior one, the backface is just ignored...)
2) I selected the tangency 'loop' of the 3d profile all at once and converted the entities so then I had the original wrap and a sketch of the 3d profile. When I went into 3d sketch and double click this new sketch, the lines are still black, and fully defined!
3) I then applied the Offset surface, got the 2D profile with a 0.9 offset, still fully defined! I can now do a reverse offset at the same distance as before to create a new sketch of the wrap profile in 2D.
Note: Visible in these screens is the original 2D profile I used for the goggles in blue.
Rev A Offset front view.jpg
Rev A Offset.jpg
So that is how to get a spline out of a wrap! Mission accomplished!
Getting everything else fully defined tonight, and surfaced tomarrow!
~"Because if you don't make it, its your own damn vault!".... .. .
- Best regards,