BlockDaylightDetector.java 文件源码

public void updatePower(World worldIn, BlockPos pos)
{
    if (!worldIn.provider.getHasNoSky())
    {
        IBlockState iblockstate = worldIn.getBlockState(pos);
        int i = worldIn.getLightFor(EnumSkyBlock.SKY, pos) - worldIn.getSkylightSubtracted();
        float f = worldIn.getCelestialAngleRadians(1.0F);
        float f1 = f < (float)Math.PI ? 0.0F : ((float)Math.PI * 2F);
        f = f + (f1 - f) * 0.2F;
        i = Math.round((float)i * MathHelper.cos(f));
        i = MathHelper.clamp_int(i, 0, 15);

        if (this.inverted)
        {
            i = 15 - i;
        }

        if (((Integer)iblockstate.getValue(POWER)).intValue() != i)
        {
            worldIn.setBlockState(pos, iblockstate.withProperty(POWER, Integer.valueOf(i)), 3);
        }
    }
}