What is the shape of the object that rotates? Is it rotating at a quick rate or a slow rate? If at a quck rate or close to round-shaped, then maybe the 'inRange' intersection method would be sufficient if used in the rotating objects class.

the thing is davmac, I have to use greenfoot for my code for a project, but I'm stumped as to how to check for collision without using the in-built methods. danpost the object when done will be a rhomboid or some form, but I'm going to place an invisible circle of the same radius in the same position as the rhomboid, so although it will LOOK like the snowman(my character) is colliding with the rhomboid, Its colliding with the circle. I just have absolutely no idea how to code this without the methods as I've been using the built-in methods all year :/ any help would be appreciated.

Just put the collision detection between the rhomboid and the snowman in the rhomboid class and use the getObjectInRange method (which will basically treat the rhomboid as a circle for the collision). This way you will not need to add that invisible circle of the same radius in the same position as the rhomboid.

Sounds like you need to take the long route, using the World class method 'getObjects' and the Actor class methods 'getX', 'getY', 'getImage', and the GreenfootImage class methods 'getWidth' and 'getHeight' to determine what is where and where your actor can and cannot go. For your rhomboid, you will need to use 'Math.cos' and 'Math.sin' to determine if any actors intersect it.

The thing is danpost, my tutor has told me to do it using physics formulae (:S) But I've no idea how to go about that. Would it be possible for you to post up a sample of the code?