Lecture 2

Question 1

What is the dot product of a vector?

Answer 1

|a||b|cos(theta)

Question 2

What is the cross product of a vector?

Answer 2

|a||b|sin(theta)n

where n = the unit vector perpendicular to the plane containing a and b

Question 3

What is the dot product used for?

Answer 3

Determine the angle between two vectors

Question 4

What is the cross product used for?

Answer 4

To determine the normal of a plane

To determine the vector to rotate around for torque eg. a tank turret

Question 5

Pitch is rotation around the ___ axis

Yaw is rotation around the ___ axis

Roll is rotation around the ___ axis

Answer 5

X
Y
Z

Question 6

What does Quaternion.identity represent?

Answer 6

No rotation, perfectly aligned with world axes

Question 7

Why is GetButton used instead of GetKey usually?

Answer 7

Because it allows the user to remap controls

Question 8

What does GetAxis return?

Answer 8

float between -1 and 1 depending on the position of the control