RR in 2D with moving chipsource

Thie page present an unexplained shape that is obtained with the following algorithm:

- use the UDLR up down left right algorithm with the extension which consist in initializing an empty cell with the value art the beginning of the chip insertion.

We Know that we get a circle with no moiré pattern anymore.

-make a second modification in this algorithm : When the chip crosses the location where the chip has been emitted, move the chip source location .

the chipsource is moved in the opposite direction of the rotor when the chip passes at the location where the source is.

if(grid[agentCurrentPositionx][agentCurrentPositiony]== 3)

{

agentCurrentPositiony++;

if( agentCurrentPositionx==centerx && agentCurrentPositiony==centery ){centery--;}

The obtained figure is pretty strange .