Java Game Tutorial: Sprite/Object rotation

Channel:

Almas Baim (AlmasB)

Subscribers:

9,540

Published on January 15, 2015 2:28:07 PM ● Video Link: https://www.youtube.com/watch?v=ypFIoPaTwJQ

Category:

Tutorial

Duration: 12:34

2,465 views

15

Here's a good vectors tutorial
http://www.mathsisfun.com/algebra/vectors.html

Note: javafx coordinate space starts at top-left, so we have to take that into account when working with Y values

Note: angle that we calculate is NOT the positive angle between bullet vector and X axis, it's negative because javafx rotate transform is applied clockwise and we want counterclockwise

Note: it is also possible to calculate the angle with atan2 as follows:
double angle = Math.toDegrees(Math.atan2(vector.y, vector.x));