The Powder Toy

The-Con

@dnerd
I don't think so. When i need the X,Y coordinates, I do it the painful way. And to find how many there are, I also do it a semi-painful way.

HeyJD

@dnerd
There is a way:

for(i=0; i<NPART; i++)
{
	if(parts[i].type == TypeYouWantHere)
	{
		Thing you want to do here;
	}
}

So an example could be,:


for(i=0; i<NPART; i++)
{
	if(parts[i].type == PT_METL)
	{
		parts[i].life = 9999;
	}
}

That code would change all metl life to 9999.

dnerd

@HeyJD
so in the "thing you want to do here;"
i could type "parts[i]. (here something in C which says to save the Y coordinates of those particles)"

and it would do that?

also, is there a command which sets a variable to the number of particles of a certain type?

for example

A=(this command:dust)

sets a as the number of particles of dust?

Pilihp64

the location is automatically gotten for particles inside the update_particles_i function, it looks something like this


	for (i=0 ; i<NPART); i+=1)
		if (parts[i].type)
		{
		        x = (int)(parts[i].x+0.5f);
			y = (int)(parts[i].y+0.5f);
                        *stuff with coords x,y here*
                }

the +0.5 is for rounding, then it is turned into an int for general usage (but it is still stored as float)

dnerd

cracker64:

inside the update_particles_i function

so would that be inside some file?

P.S. thanks everyone for helping a noob through the complexities of coding!

Pilihp64

yes that function is in powder.c, which has all the general reactions and properties of particles, specific element code is now in a separate *.c file.

edit: yay 1000th post, i'm not noobish enough to create a topic for it like some OTHER people on this forum

dnerd

@cracker64
great, thanks alot, ill use this, but you can lock it since my question has been answered.

X and Y coordinates, particle count.