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slight speed improvement, fixed indentation

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Damian Schneider 2025-05-10 09:11:07 +02:00
parent 5fe766399b
commit 608aff1e17
1 changed files with 17 additions and 13 deletions
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30
wled00/FX.cpp
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@ -9004,30 +9004,34 @@ uint16_t mode_particlegalaxy(void) {
PartSys->particleMoveUpdate(PartSys->sources[0].source, PartSys->sources[0].sourceFlags, &sourcesettings);
// move alive particles in a spiral motion (or almost straight in fast starfield mode)
int32_t centerx = PartSys->maxX >> 1; // center of matrix in subpixel coordinates
int32_t centery = PartSys->maxY >> 1;
if (SEGMENT.check2) { // starfield mode
PartSys->setKillOutOfBounds(true);
PartSys->sources[0].var = 7; // emiting variation
PartSys->sources[0].source.x = centerx; // set emitter to center
PartSys->sources[0].source.y = centery;
}
else {
PartSys->setKillOutOfBounds(false);
PartSys->sources[0].var = 1; // emiting variation
}
for (uint32_t i = 0; i < PartSys->usedParticles; i++) { //check all particles
if (PartSys->particles[i].ttl == 0) continue; //skip dead particles
int32_t centerx = PartSys->maxX >> 1; // center of matrix in subpixel coordinates
int32_t centery = PartSys->maxY >> 1;
// (dx/dy): vector pointing from particle to center
int32_t dx = centerx - PartSys->particles[i].x;
int32_t dy = centery - PartSys->particles[i].y;
int32_t dx = centerx - PartSys->particles[i].x;
int32_t dy = centery - PartSys->particles[i].y;
//speed towards center:
int32_t distance = sqrt32_bw(dx * dx + dy * dy); // absolute distance to center
int32_t distance = sqrt32_bw(dx * dx + dy * dy); // absolute distance to center
if (distance < 20) distance = 20; // avoid division by zero, keep a minimum
int32_t speedfactor;
int32_t speedfactor;
if (SEGMENT.check2) { // starfield mode
PartSys->setKillOutOfBounds(true);
PartSys->sources[0].var = 7; // emiting variation
PartSys->sources[0].source.x = PartSys->maxX >> 1; // set emitter to center
PartSys->sources[0].source.y = PartSys->maxY >> 1;
speedfactor = 1 + (1 + (SEGMENT.speed >> 1)) * distance; // speed increases towards edge
//apply velocity
PartSys->particles[i].x += (-speedfactor * dx) / 400000 - (dy >> 6);
PartSys->particles[i].y += (-speedfactor * dy) / 400000 + (dx >> 6);
}
else {
PartSys->setKillOutOfBounds(false);
PartSys->sources[0].var = 1; // emiting variation
speedfactor = 2 + (((50 + SEGMENT.speed) << 6) / distance); // speed increases towards center
// rotate clockwise
int32_t tempVx = (-speedfactor * dy); // speed is orthogonal to center vector