Wk02_0917

• Why do we rely on triangles instead of quads (squares) in 3D graphics?

Because 3 points decide a surface and that's a triangle.

• What’s the difference between Painter’s Algorithm vs Z-Buffer?

Painter's Algo cost more time but save memory

Z-buffer cost memory but save time

Also Painter's Algo can't deal with intersecting planes while Z-Buffer can.

• What is the surface normal of the floor in Vector3 notation? What is the surface normal of your face?

floor: Vector3.up

face: countless vectors pointing at the direction that is roughly at the front of me.

• Pick a part of the video where you thought either "wow that makes so much sense" or "wtf is that, why would you do that?"

The GPU having multiple parallel processors part is really cool, but I hope AAA PC games could be more friendly to people without a fancy GPU like me.