Changes

== Known Bugs ==

== Known Bugs ==

* <s>No error checking on gradient check, so will get array underflow and overflow. Fix in pipelines. </s>

* <s>No error checking on gradient check, so will get array underflow and overflow. Fix in pipelines. </s>

* Gradient not calculated for AI players, despite cursor being vasible. Seems to think cursor in [0,0] position.

* Gradient not calculated for AI players, despite cursor being visable. Seems to think cursor in [0,0] position.

* New algorithm based on flood fill causes stack overflow. Might be able to overcome with mesh or different implimentation of same algorithm.

==Thanks to==

==Thanks to==