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You need to design a library that will help determine if rockets can land on a platform. Whenever rocket is getting back from the orbit, it needs to check every now and then if it's on a correct trajectory to safely land on a platform. Whole landing area (area that contains landing platform and surroundings) consists of multiple squares that set a perimeter/dimensions that can be described with coordinates (say x and y). Assuming that landing area has size of square 100x100 and landing platform has a size of a square 10x10 and it's top left corner starts at a position 5,5 (please assume that position 0,0 is located at the top left corner of landing area and all positions are relative to it), library should work as follows:
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if rocket asks for position 5,5 it replies
ok for landing -
if rocket asks for position 16,15, it replies
out of platform -
if the rocket asks for a position that has previously been checked by another rocket (only last check counts), it replies with
clash -
if the rocket asks for a position that is located next to a position that has previously been checked by another rocket (say, previous rocket asked for position 7,7 and the rocket asks for 7,8 or 6,7 or 6,6), it replies with
clash.
• rocket can query it to see if it's on a good trajectory to land at any moment
• library can return one of the following values: 'out of platform', 'clash', 'ok for landing'
• more than one rocket can land on the same platform at the same time and rockets need to have at least one unit separation between their landing positions
• platform size can vary and should be configurable