Discussions

@Jeph, I am quite sure there is a problem with this line: <Code Omitted>Also, not only will your loop add a rock at all location at one time, but the if condition will most probably be true for many act cycles in a row -- meaning rocks will be added in an abundance. Again, I urge that the adding of rocks dependent on the score be done in the MyWorld class act method. The "dying" of the world should be implemented there also. Without knowledge of the number of rocks initially in the world and if any are ever removed, it would be difficult to

Move line 12 to be line 35. At line 12, it is assigned a value only once (when the world is created). At line 35, it (as a new variable each time) will be assigned a (new) value each time you are creating a new BottomPipe object. Also, to get a number between 20 and 200, inclusive, use: <Code Omitted>

You got the 4th direction in; but, you still need to reset steps to zero when turning. There is also now a problem that getRotation returns a value between 0, inclusive, and 360, exclusive. It will never be -90, as your new condition compares it to.

This really did not answer my question. Nor, did it provide all of what I was trying to understand. I was hoping to get an answer to this, as well: If not, then you need a single field for the "facing" direction (not two). Otherwise, the rotation of the player can be used, instead. If using a field, its values could be equi

<Code Omitted>

Thank you ! I figure it out.

Thanks works great, thank you for the help.

You really need to be more specific. Show the two classes involved and point to what you are trying to access and from where. Non-static methods are always called on an object created from the class the method is in. If no object is explicitly given, then the method is being called from within the class (or from a subclass) and the object is the same as that which the calling method was executing on and can be referenced by the keyword 'this'. Calling on a object created by a different class, you must explicitly g

oh Wow thanks, I did not notice that

Vielen Dank für eure Hilfen, hat mir sehr geholfen.

You were right i overlooked this. field Rotation was initialized in my constructor and given a random value which was than assigned to setRotation(). I could have actually used setRotation(Greenfoot.getRandomNumber(...)); When they collide it would set the rotation field from Actor to the new value but not rotation in my class which was used to calculate the new rotation. So it appeared as it was being ignored but it actually just set it to the same amount every time. Thanks for changing my point of view, was clueless here for a while.

Line 19 should add a cherry -- not a blueberry.

The demo was geared toward the movement -- not really anything else. However, the shooting code is in the Invader class. The last line in its act method partly controls when a shot is fired by having each invader shoot randomly, but on an average of once every 200 act cycles. In the shoot method, shooting is further limited to only if the invader is the lowest one in its column. For some unkno

The / is just division. Actually, in this case, it is integer division where any fractional remainder is discarded (only because we are working with integer values). The % is the modulus operator. It returns the remainder after division So, as the iterator, i, progresses from 0 to 31, i/8 will be 0 until i=8, then 1 until i=16, etc., while i%8 will repeatedly go from 0 to 7. One complete cycle from 0 to 7 will occur for each "increment" of i/8 (which will go from 0 to 3).

You might like to have a look at this video . The score counter starts at about 5:45.