kevinawalsh
commented
4 years ago Nice catch. This is almost certainly a fault with the "fast path grid" in CircuitState. State for any point within 2000 units of the origin is handled using a dense 2d array. This makes most simulation faster, at the cost of increased memory usage. Anything further away uses a slow path hashtable, trading off speed for reduced memory usage. That code was a quick hack to improve performance, and there must be a regression in the drawing code where the slow path is failing.
usually all components have gray pins when not connected and when using the poke tool you can look at the state of a wire...
well after a certain distance from the top left of the circuit this kinda stops working.
components get black/blue pins (black if pin is wider than 1 bit) and using the poke tool doesn't seem to work anymore. even when the wire is showing a high or low state the poke tool still only shows "X"s but only after a split point in a wire (the split points are always blue on single bit wires)
it's hard to explain, so here a few screenshots. how it's supposed to be:
how it looks if far enough away:
both right next to eachother.
no idea why this is happening, i also tried it on a completely new file and it still happens. so this should be easy to reproduce.
lastly, this is purely visual, the circuits still work as expected.