how do I detect what element is touching
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I have a very simple (possibly naive) solution to checking particles touching a particle: if each particle can retrieve it's coordinates tuple (x,y), and a particle can be found at a position given by a similar tuple, you could probe the surrounding pixels of each particle of your detector particle and find the particles around it. For example, for each detector particle at (x,y), find particles (x+1, y), (x-1, y), (x,y+1) and (x,y-1) and change their types. If I am not mistaken, this is a Von Newman Cellular Automaton neighbourhood. This seems like a real lag machine if you ask me; is there a better implementation?
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http://boxmein.x10.mx/tptelements/lua-reference.html#simulation
See sim.partNeighbors (an alias of sim.partNeighbours, both are the same thing). You can iterate through a list of all nearby particles quickly. I have never seen anyone use it mostly because it's slightly more advanced and the function is undocumented ...
I think it's something like:
for i in sim.partNeighbors(x, y, 1 (maybe 2 or 3?)) do
i is the particle id, use it however
end
The "type" argument will limit it to only elements of a certain type and is optional. -
@jacob1 (View Post)
http://boxmein.x10.mx/tptelements/lua-reference.html#sim.partNeighbours (you can link to all sorts of things!) -
noooooooooooooo
use http://boxmein.x10.mx/tptelements/lua-reference.html#sim.neighboursEdited 2 times by mniip. Last: 28th Dec 2013 -
ok, found out this does sort of what I want; I'll just have to run it once per every direction; though that might get slow.
if sim.partProperty(sim.partID(x, y+1), sim.FIELD_TYPE)==elements.DEFAULT_PT_GLAS then
sim.partProperty(sim.partID(x, y+1), sim.FIELD_TYPE , elements.DEFAULT_PT_METL)
endEdited 2 times by zBuilder. Last: 28th Dec 2013 -
@mniip (View Post)
I guess I don't know the functions very well either, lol. The one you posted was the one I was thinking of.
@boxmein (View Post)
I tried that, but it didn't work because you used the "sim" shortcut instead of "simulation" which I was trying. http://boxmein.x10.mx/tptelements/lua-reference.html#simulation.partNeighbors didn't work.
@zBuilder (View Post)
if you can use sim.neighbors that would work a lot better and be less laggy.for i in sim.neighbors(x, y, 1, 1, tpt.el.glas.id) do
tpt.set_property("type", i, tpt.el.metl.id)
end
Also I prefer the old api since more people know it and it's much cleaner ... but really doesn't matter. Also I tried this and it doesn't completely work for some reason ... weird. It changed the ones on the corners though.Edited once by jacob1. Last: 28th Dec 2013 -
jacob1:
@mniip (View Post)
I guess I don't know the functions very well either, lol. The one you posted was the one I was thinking of.
@boxmein (View Post)
I tried that, but it didn't work because you used the "sim" shortcut instead of "simulation" which I was trying. http://boxmein.x10.mx/tptelements/lua-reference.html#simulation.partNeighbors didn't work.
@zBuilder (View Post)
if you can use sim.neighbors that would work a lot better and be less laggy.for i in sim.neighbors(x, y, 1, 1, tpt.el.glas.id) do
tpt.set_property("type", i, tpt.el.metl.id)
end
Also I prefer the old api since more people know it and it's much cleaner ... but really doesn't matter. Also I tried this and it doesn't completely work for some reason ... weird. It changed the ones on the corners though.when I use partneigbours it fails because it is "calling a table value", whatever that means. though your arguments look different then the last set I saw so I'll give it a shot! :)
edit: sorry, that one throws an error instead as well :(
Edited once by zBuilder. Last: 28th Dec 2013 -
@zBuilder (View Post)
I was wrong, it's just sim.neighbors, not sim.partNeighbors. One returns an iterator, the other just a table.
