private static Flame morphFlames_fade(
Prefs pPrefs, Flame pFlame1, Flame pFlame2, int pFrame, int pFrames) {
if (pFrame < 1 || pFrames < 2) return pFlame1;
double fScl = (double) (pFrame - 1) / (pFrames - 1);
if (fScl <= MathLib.EPSILON) {
return pFlame1;
} else if (fScl >= 1.0 - MathLib.EPSILON) {
return pFlame2;
}
// fade out layerz of the source flame
Flame res = pFlame1.makeCopy();
morphFlameValues(pFlame1, pFlame2, fScl, res);
for (Layer layer : res.getLayers()) {
layer.setWeight(layer.getWeight() * (1.0 - fScl));
}
// add and fade in layerz of the dest flame
for (Layer layer : pFlame2.getLayers()) {
Layer copy = layer.makeCopy();
copy.setWeight(copy.getWeight() * fScl);
res.getLayers().add(copy);
}
return res;
}
