> I don't see what good using another table would do, since the
> vectors are changing with each iteration of the plasma.
i am not sure i uploaded the source code to my plasma, but, i know
daniel morais did a decent one as well :) if your doing a sinus table,
you pretty much should be doing:
pix = (a + b + c + d) / 4;
write pix to screen
it has been a while since i looked at it (i wrote the plasma demo a
*long* time ago). i know for sure, the sinus tables are not modified
in the main loop :) to get the 'wave' effect, you can modify the
*offset's* (hint)
i got bored :) - so, here is the source:
---
t1=p1;
t2=p2;
for (y=40; y--; )
{
t3=p3; t4=p4;
for (x=40; x--; )
{
color =
(cosinus[t1] + cosinus[t2] +
cosinus[t3] + cosinus[t4]) & 0xff;
if (color == 0) color = 1;
color |= color << 8;
color |= color << 16;
color |= color << 24;
*ptr1++ = color; *ptr2++ = color;
*ptr3++ = color; *ptr4++ = color;
t3+=2; t4+=(t3&3)-1;
}
ptr1 += 120; ptr2 += 120;
ptr3 += 120; ptr4 += 120;
t1-=2; t2+=1;
}
p1+=1; p2-=3; p3+=4; p4+=2;
---
so, nothing complex there really :) the [] references could probably
be sped up a bit :) might compile better with this code:
color =
(*(cosinus+t1) + *(cosinus+t2) +
*(cosinus+t3) + *(cosinus+t4)) & 0xff;
might make it a bit faster :)
---
Aaron Ardiri [EMAIL PROTECTED]
CEO - CTO +46 70 656 1143
Mobile Wizardry http://www.mobilewizardry.com/
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