Method checkLightFor

src/main/java/net/minecraft/world/World.java:2843–2977

(EnumSkyBlock lightType, BlockPos pos)

    }

    public boolean checkLightFor(EnumSkyBlock lightType, BlockPos pos)
    {
        if (!this.isAreaLoaded(pos, 17, false))
        {
            return false;
        }
        else
        {
            int i = 0;
            int j = 0;
            this.theProfiler.startSection("getBrightness");
            int k = this.getLightFor(lightType, pos);
            int l = this.getRawLight(pos, lightType);
            int i1 = pos.getX();
            int j1 = pos.getY();
            int k1 = pos.getZ();

            if (l > k)
            {
                this.lightUpdateBlockList[j++] = 133152;
            }
            else if (l < k)
            {
                this.lightUpdateBlockList[j++] = 133152 | k << 18;

                while (i < j)
                {
                    int l1 = this.lightUpdateBlockList[i++];
                    int i2 = (l1 & 63) - 32 + i1;
                    int j2 = (l1 >> 6 & 63) - 32 + j1;
                    int k2 = (l1 >> 12 & 63) - 32 + k1;
                    int l2 = l1 >> 18 & 15;
                    BlockPos blockpos = new BlockPos(i2, j2, k2);
                    int i3 = this.getLightFor(lightType, blockpos);

                    if (i3 == l2)
                    {
                        this.setLightFor(lightType, blockpos, 0);

                        if (l2 > 0)
                        {
                            int j3 = MathHelper.abs_int(i2 - i1);
                            int k3 = MathHelper.abs_int(j2 - j1);
                            int l3 = MathHelper.abs_int(k2 - k1);

                            if (j3 + k3 + l3 < 17)
                            {
                                BlockPos.MutableBlockPos blockpos$mutableblockpos = new BlockPos.MutableBlockPos();

                                for (EnumFacing enumfacing : EnumFacing.values())
                                {
                                    int i4 = i2 + enumfacing.getFrontOffsetX();
                                    int j4 = j2 + enumfacing.getFrontOffsetY();
                                    int k4 = k2 + enumfacing.getFrontOffsetZ();
                                    blockpos$mutableblockpos.func_181079_c(i4, j4, k4);
                                    int l4 = Math.max(1, this.getBlockState(blockpos$mutableblockpos).getBlock().getLightOpacity());
                                    i3 = this.getLightFor(lightType, blockpos$mutableblockpos);