Stamp Placement Alignment

[nyalloc]

LDtk current supports stamps by allowing tiles to be selected using the X modulo and Y modulo modifiers, each letting the user apply the rule every N tiles.

Because of this, automatically applied stamps, like those in the LDtk samples, have the appearance of being aligned to a grid.

A level may want to apply stamps in such a way that they are not aligned to this implicit grid. For example:

Using the X modulo and Y modulo modifiers to apply this 2x2 stamp, attempting the above design will result in the following result.

Stamps are are only applied when the start tile is on an even X and an even Y. If the start tile is on an odd X or Y coordinate, it does not apply the stamp.

I think we should investigate how we can achieve a more generalised form of automatic stamping in LDtk.

[deepnight]

Actually, after some testing, it seems that such a change would have lots of complicated implications:

• this change would break lots of existing content
• painting on one specific coordinate has cascading consequences on tiles very far away in the level (like the full level), creating some potential big performance issues
• evaluating rectangle of tiles instead of single tiles has a big impact on performances for all existing rules
• in some cases (eg. a "Tree" stamp), discarding would not be a desired effect

So I'll move this issue to the backlog and see if that could be done after a potential rework/optimization of the current Rule system.