[1.12] Setting fire to the side of blocks [Solved]

[nil]

I used

            if (this.world.isAirBlock(blockpos) && this.element == SpellElement.FIRE)
            {
                this.world.setBlockState(blockpos, Blocks.FIRE.getDefaultState());
            }

to set fire to blocks, however this doesn't set fire to the block if it's hit from the side. How do i do that?
 

Edited December 17, 2019 by nil

[nil]

The issue is that if the block is hit from the side it will spawn a fire block which will then instantly disappear if there is no block beneath the air block which was set to fire, instead of setting the fire to be on the blocks side.

Edited December 17, 2019 by nil

[nil]

It always sets the air block to "vertical" fire. Not sure why, that's my question.

[nil]

For some reason i had in memory that all blocks could be set on fire like flammable blocks can. Everything is fine.