public static float interpolateAngle(float src, float dest, float delta) {
src = wrapAngle(src);
dest = wrapAngle(dest);
if (Math.abs(src - dest) > MathHelper.PI)
src += dest < src ? -MathHelper.TWO_PI : MathHelper.TWO_PI;
if (src < dest) src = Math.min(src + delta, dest);
else src = Math.max(src - delta, dest);
return MathHelper.wrapAngle(src);
}
private void updateColor() {
eventLayer.setBackgroundColor(0, 0, 0, MathHelper.clamp(current, 0, 1));
}