[Help] Help with this collision

[Cajujoe]

Hello guys,

I'm making a game where if a dog player is in the same tile as a dog enemy, he "dies"and the level restart. When the player moves, the enemy moves horizontaly. This is the rule:

late [ Player  enemies ] -> [ Player enemies ] sfx1 restart

But in certain start positions, it's impossible for the player to be in the same tile as the enemy, so they cross paths and nothing happens. Somebody could help me with this problem? Here is the simplified code with only one level. It happens with the first enemy dog, but not with the second and the third. Thanks!

[Chris Pickel]

You can detect crossing movement in a non-late rule, like this:

[> Player | < Enemies] -> [Player | Enemies] sfx1 restart

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[Cajujoe]

Hello Chris, thank you very much for your answer.

Unfortunately the problem persists, the Player continues to cross freely in the horizontal line with some enemies depending on the start position.

[Chris Pickel]

I see. You want to player to lose if they enter a tile as an enemy is either entering or exiting it? In that case you would drop the <:

[> Player | Enemies] -> sfx1 restart

(you actually don’t need the right-hand side if the result is to restart)

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[Sandro Massarani]

Thanks Chris!! 

I only want the collision to happen if the enemy is entering a tile, not if he is exiting. So, I changed the rule to:

[> Player | < Enemies] -> sfx1 restart

and now works!!

Thank you very much!

[Chris Pickel]

Oh, I see the mistake I made.

Your game sets “require_player_movement”. The original rule I wrote stopped the movement. I thought that was irrelevant, because the result of the turn shouldn’t matter if the game restarts. Actually, PuzzleScript detects the lack of movement, and cancels the whole turn, including the restart. Removing the right side restores the movement, allowing the game to restart.

This is surprising to me, maybe a bug? I thought that “restart” would count as an outcome as far as require_player_movement goes. I reduced a demonstration down to https://www.puzzlescript.net/editor.html?hack=72649bfb7b72f42306261e6211841b57

[Stephen Lavelle]

It's a weird edge case, but I'm going to make a call and say that it's not a bug ^^. (Thanks for assembling a demo version).

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