// SlideObject
BOOL SLIDE_OBJECT(Object object, float toX, float toY, float toZ, float speedX, float speedY, float speedZ, BOOL collision);
Returns true if the object has finished moving.
If false, moves the object towards the specified X, Y and Z coordinates with the specified X, Y and Z speed.
See also: https://gtagmodding.com/opcode-database/opcode/034E/
Has to be looped until it returns true.