I wondered if anyone could help me with a way to get a structure spawn inside a hillside. I have tried making it not spawn if the block in fron of it isn't grass as well as not spawn if there isn't a grass | dirt | stone block above it, but it didn't work.

Then you are not doing it correctly

But we can't tell you anything unless you show us the code, so jump over to paste.minecraftforge.net and paste the code for us

 

Also, be sure to already have checked that the code is being run when debugging!

I did something like this:

 

public boolean LocationIsValidSpawn(World world, int x, int y, int z) {
	int checkID = world.getBlockId(x, y, z);

	if (checkID != (Block.grass.blockID)) {
		return false;
	}
	return true;
}

public boolean LocationIsValidSpawn2(World world, int x, int y, int z) {
	int checkID = world.getBlockId(x, y, z);

	if (checkID != (Block.grass.blockID | Block.dirt.blockID | Block.stone.blockID)) {
		return false;
	}
	return true;
}

public boolean generate(World world, Random rand, int i, int j, int k) {
	if (!LocationIsValidSpawn(world, i, j, k + 1)) {
                    if(!LocationIsValidSpawn2(world, i, j + 5, k + 1)) {
		return false;
                      }
	}

// All the generation of blocks here

return true;
}

Bump

or is not | it's ||

I have tried that out as well.

try doing it this way:

 

if (checkID != Block.grass.blockID || checkID != Block.dirt.blockID || checkID != Block.stone.blockID)
// do stuff

 

 

You also have to check is air there because. It could spawn in a cave.

Also you have to set the minimum worldhight of the spawn. i do not mean null.

I mean Spawnhight of the structure.

 

i hope that helps too.