PalmOS plasma

[Brandon Smith]

I have run numerous plasmas on my m505, one from Aaron Ardiri, and some others from his mobilewizardry site. I need to write my own plasma for a paint program I am working on. So far I came up with the following, which runs okay on the emulator or simulator, but is really slow on my m505. cos_fx and Addfx are macros. What is making this loop run so slowly? And is there some other way to write a sin/cos based plasma that is better?

Brandon

for (curY=0; curY < ySize; curY++) {
destPtr = rowStart;
for (curX=0; curX < xSize; curX++) {
curPhaseX = curX + offsets[flowPos[0]] + offsets[flowPos[1]];
curPhaseY = curY + offsets[flowPos[2]] + offsets[flowPos[3]];
result = Addfx(cos_fx(curPhaseX), cos_fx(curPhaseY));
curPhaseX = curX + offsets[flowPos[4]] + offsets[flowPos[5]];
curPhaseY = curY + offsets[flowPos[6]] + offsets[flowPos[7]];
result += Addfx(cos_fx(curPhaseX), cos_fx(curPhaseY));
result <<= 8;
*destPtr++ = palette[fxtoi(result) & 0xff];
}
rowStart += 160;
}

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