The Following is how to make a cap drawing with Google SketcUp
1. Make a horizontal circle as a diameter of a cap
2. Perpendicular with above, make a circle as a height of a cap, and also make a more small circle depend on a thickness of a cap.
3. build a line of a height and diameter a purpose as a slice or trim of drawing.
4. delete or trim drawing until a rest a circle of diameter of a cap and quarterly of vertical circle as below,
5. After Drawing as a rest of below click button of a "follow me" on SketchUp.
6. Click the quarter circle model around the horizontal circle (diameter of a cap).
7. Done, we get cap model as per picture below
you can get my drawing template of Cap above in SketchUp file
download
Autodesk Sketchbook Pro 2011
