Can't seem to understand particle flags
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I don't understand what's wrong with this line of code in my new element:int photf = pmap[posx-1][posy].flags;This was the message:C:\Program Files\SmartGit 2.1\bin\The-Powder-Toy\src\elements\solar.c82error: request for member 'flags' in something not a structure or unionIn the code line, posx and posy were int variables for the position of the current particle.Could someone please tell me what's wrong?
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pmap does not actually contain the particle data, it just tells you which particle is in each position. pmap is a 2D array of unsigned integers, and each element of it stores the type and index of the particle in that position (if any).
If the pmap value is r, then r&0xFF is the type of the particle, and r>>8 is the index in the parts array.
An example:unsigned r = pmap[posx-1][posy]; //Get the pmap value
if (r&0xFF) //if there's a particle there
{
//Do stuff
int photf = parts[r>>8].flags;
} -
Thanks! Also, do you think that there would be a way to automatically run a script at startup?
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@mniip (View Post)
@humanoidbob (View Post)
Mniip means that if you make a text file in TPTs archive, paste code in and change format to .lua it will be automatically run by TPT in startup. -
@jenn4 (View Post)
No, he means the file actually has to be named "autorun.lua", not bleh.lua, that won't be ran on startup. -
Thanks! I think that this will work!How do you exit the program from inside this file? I want to make a password so my brother can't get in.
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You can exit a program using os.exit(), and make the password like this:
thepassword = "thepowdertoy"
local pass = tpt.input("password", "Enter the password or \"quit\" to quit")
while pass ~= thepassword do
if pass == "quit" then os.exit() end
pass = tpt.input("password", "Wrong password, try again or \"quit\" to quit")
end
It does give you unlimited tries, and the password isn't secret at all, but it still should work good with a good password
