Heres the deal. I have been trying out some old-school graphics programming using TinyPTC (
Check it out here). I am trying to just get some basic stuff working, right now I am trying to get wu particles working (as well as my initials spelled with dots waving in a sine wave). Information on this is hard to find, I am using
this site pretty much. I am using the algorithm directly with less than optimal results.
The exe can be found here
zipped
It is actually supposed to be my initials, though it just looks like a moving mass of dots. Anyway, the top half looks great, but the bottom dots looks pretty messed up and I have no idea why.
void plotwu(float wx, float wy, int wb)
{
int x, y;
float fx, fy;
int btl, btr, bbl, bbr;
x = int(wx);
y = int(wy);
fx = wx - x;
fy = wy - y;
btl = (1-fx) * (1-fy) * wb;
btr = (fx) * (1-fy) * wb;
bbl = (1-fx) * (fy) * wb;
bbr = (fx) * (fy) * wb;
plot(x, y ,rgb(btl,btl,btl));
plot(x+1, y ,rgb(btr,btr,btr));
plot(x, y+1,rgb(bbl,bbl,bbl));
plot(x+1, y+1,rgb(bbr,bbr,bbr));
}
This is the function, and if you want me to post more code, feel free. (I'm sure this is a stupid mistake, but I will never be able to find it)
