What steps need to take a real leg, to do something in 3D. In other words , I want to make a piece to fit on one leg , but for that I have to create the object in 3D. How can I make a leg 3D only with specific measures ? Type , perimeters , widths , heights, etc.
I would go look for existing models that can be tweaked to a specific person. I know there are body models for a program called poser. I'm sure there are many starting file out there. The real trick is dealing with how it moves and changes. You will likly need 2 to 20 different states depending on required accuracy/flexibility
If you end up modeling from scratch, SE is not the best Nurbs package that is the most fitting control geometry to the human body and a simple computer model. Rhino would be a better fit to you're ends. Then export from Rhino to SE to make the "Add-on" to the existing leg.
Nurbs=non-uniform rational B spline. or a curve that fits point with specific ordered controls.
As they [Shin Guards] are a maluable item anyway, I wouldnt' get caught up in the intricate details of a limb.....just gather a few sectional type profiles at appropriate spacings to capture the "simplest form" you can, then recreate them into Solid Edge as sketches, surface loft those, trim to a boundary profile, and thicken the result to have a solid model of the part.
Are you going to make custom shin guards?
If so, you'll have to start with scanning the leg(s) and turning the point cloud data into usable mesh or surfaces. You'll need a 3rd part app for that because it is not something that Solid Edge can currently do.
Once you have the surface, then you can bring it into Solid Edge and use it as construction geometry to reference when creating your actual parts.
I have a 3D scanner, but was wondering if the distance and through some points / leg measures could create a mold similar to the actual measurements . Measure the width of the leg, or perimeter , you can not make a mold?