If you've seen me on IRC you know about this. I'm having trouble with two elements, POST and NEGA.
POST is designed as a positive Metallic object, NEGA as a negative metallic object. While I was making electrolysis I realized that it'd be redundant to make HYDR (hydrogen) and O2 (Oxygen) with IRON if they'd just combine again. So, I remembered my school's electrolysis experiment:
Hydrogen came out of the tube with one type of current, oxygen the other.
So I made these two to allow for separate chambers to create both gasses. The problem is that when either two are sparked, the game freezes and wont move. I have put in PROP_CONDUCTS for both elements, it's just when spark touches it the game freezes. No idea why. I'm hoping more people see this than on IRC.

@PizzaPlatypus
Pardon me for not responding, but school and tennis take their toll.
Anyway, The spark isn't in there in my version.
if ((ptypes[t].properties&PROP_CONDUCTS) || t==PT_SPRK)
{
nx = x % CELL;
if (nx == 0)
nx = x/CELL - 1;
else if (nx == CELL-1)
nx = x/CELL + 1;
else
nx = x/CELL;
ny = y % CELL;
if (ny == 0)
ny = y/CELL - 1;
else if (ny == CELL-1)
ny = y/CELL + 1;
else
ny = y/CELL;
if (nx>=0 && ny>=0 && nx {
if (t!=PT_SPRK)
{
if (emap[ny][nx]==12 && !parts[i].life)
{
part_change_type(i,x,y,PT_SPRK);
parts[i].life = 4;
parts[i].ctype = t;
t = PT_SPRK;
}
}
It looks like PROP_CONDUCTS is in there.