[unsolved][1.7.2]How can i make a block that only emits light at night

[Jetfan16ladd]

Is there any way to make a block the only emits light at night and does not emit light during the day? please post ideas on how this can be done

[brandon3055]

I still have a lot to learn so i am sure there is an easier way but with what i know now this is how i would do it.

 

create two identical blocks one that emits light and one that dosn't.

 

in the randomDisplayTick() use world.getWorldTime();

 

in the block that dosnt emmit light

if it is night use world.setBlock("light emitting version")

 

in the block that dose emit light

if it is day use world.setBlock("non light emitting version")

 

This should work but im sure there is a better way out there

 

Note to get the "actual time" use

 

double days = world.getWorldTime() / 24000;
int time = (int)(world.getWorldTime() - days * 24000);

[brandon3055]

@diesieben07 i would have tryed that after my first attempt failed

 

[Jetfan16ladd]

randomDisplayTick is client-side only. You will need a TileEntity for proper ticking or constantly schedule Block updates.

 

im a noob so how can I do the TileEntity thingy or block updates

[kc9zda]

This example may work on 1.7.2, but I know it works on 1.6.2.  If you do not know how to use tile entities, please see the tutorial on the wiki. Now, on your updateEntity method, you should have something similar to:

 

public void updateEntity() {
   boolean isDay = this.worldObj.isDaytime();

   if (isDay && this.worldObj.getBlockId(this.posX, this.posY, this.posZ) == ModBlocks.litBlock.blockId) {
      this.worldObj.setBlock(this.posX, this.posY, this.posZ, ModBlocks.darkBlock.blockId);
   } else {
      if (!isDay && this.worldObj.getBlockId(this.posX, this.posY, this.posZ) == ModBlocks.darkBlock.blockId) {
         this.worldObj.setBlock(this.posX, this.posY, this.posZ, ModBlocks.litBlock.blockId);
      }
   }
}

 

This is a start, but there may be some unwanted happenings once the block changes, because Minecraft probably won't like the block changing, but not the tile entity. I also didn't include the server-client syncing code (to sync with the server).

[supercat765]

I have tried EVERYTHING and I cant get my block to emit during the day and be off at night

[shieldbug1]

Override

Block#getLightValue

and safely cast the block access to World.

 

Then you can try using

World#isDaytime

to return a different light value.

If that doesn't work, try

World#getWorldTime

- it has a value between 0 and 23,999 in ticks.

[TheGreyGhost]

Hi

 

You might gain some useful ideas (in addition to the ones above) by looking how BlockRedstoneLight works.  There are two instances of it;

Blocks.lit_redstone_lamp

and

Blocks.redstone_lamp

 

It switches between them based on whether it is getting redstone power or not.

If you look at BlockDaylightDetector, it shows you how you might tell whether it's daylight or not.

 

-TGG

[Draco18s]

There's actually no reason to switch block IDs, you can do it with metadata.