* `set_acceleration(acc)`
* `acc` is a vector
* `get_acceleration()`: returns the acceleration, a vector
+* `set_rotation(rot)`
+ * `rot` is a vector (radians)
+* `get_rotation()` : returns the rotation, a vector (radians)
* `set_yaw(radians)`
* `get_yaw()`: returns number in radians
* `set_texture_mod(mod)`