Method isActive

src/main/java/net/optifine/CustomSkyLayer.java:487–522

(World world, int timeOfDay)

    }

    public boolean isActive(World world, int timeOfDay)
    {
        if (world != this.lastWorld)
        {
            this.lastWorld = world;
            this.smoothPositionBrightness = null;
        }

        if (this.timeBetween(timeOfDay, this.endFadeOut, this.startFadeIn))
        {
            return false;
        }
        else
        {
            if (this.days != null)
            {
                long i = world.getWorldTime();
                long j;

                for (j = i - (long)this.startFadeIn; j < 0L; j += (long)(24000 * this.daysLoop))
                {
                    ;
                }

                int k = (int)(j / 24000L);
                int l = k % this.daysLoop;

                if (!this.days.isInRange(l))
                {
                    return false;
                }
            }

            return true;
        }
    }

    private boolean timeBetween(int timeOfDay, int timeStart, int timeEnd)
    {