Tips from Tutorial 3 + shadowing tutorial

-extrude

-pocket: click the skecth -> up to next -> making hole no matter how

-chamfer: set up diameters for chamfer
-shell

products

-parts - geometrical set ( for sketches and surfaces)

- body (for sketches, surfaces and solids)

- as long as things are in same body they are all unioned.
- be careful about labeling files : mark your date

- parameter : solar azimuth/ solar elevation

- ways to construct shadow lines

: line definition -> point and direction -> set up direction by using parameters

- ways to make surface : fill and join together

- way to make solid: make closed surface