[SOLVED] Help with collisions

[wannabeuk]

Hi all,

I'm trying to create a block that is 2x1 (like a door) which has only three sides, allowing the player to walk inside it (like a booth). But I simply can't get my head around how to do the collisions. I've found a good example from a old mod (1.7) but i can't seem to work out how you would do this in 1.12. Does anyone know any uptodate examples or is willing to give me some pointers?

 

Thanks.

Edited December 2, 2018 by wannabeuk
spelling

[Animefan8888]

3 hours ago, wannabeuk said:

I'm trying to create a block that is 2x1 (like a door)

A door is actually too blocks(states). 

 

Also we cant help you if you dont post your code, preferably on git or some other code sharing site.

[wannabeuk]

Thanks for the reply, I was aware it was two blocks it's just so much has changed since I last started modding that i was completely lost.

I've managed to get my block to place correctly so it's two high. Now i'm trying to work on collisions.

 

This is what i have :

 

static double AXIS_MIN_MIN = 0, AXIS_MIN_MAX = 0.1, AXIS_MAX_MIN = 0.9, AXIS_MAX_MAX = 1, AXIS_FLOOR_MIN = -0.01, AXIS_FLOOR_MAX = 0;

@Override
    public void addCollisionBoxToList(IBlockState state, World worldIn, BlockPos pos, AxisAlignedBB entityBox, List<AxisAlignedBB> collidingBoxes, Entity entityIn, boolean isActualState) 
    {
        if(entityIn == null)
        {
            return;
        }
        
        List<AxisAlignedBB> axis = new ArrayList<AxisAlignedBB>();
        
        EnumFacing facing = worldIn.getBlockState(pos).getValue(FACING);
        
        int x = pos.getX();
        int y = pos.getY();
        int z = pos.getZ();
        
        //TODO : Work out how to do upper / lower block
        if(facing == EnumFacing.NORTH)
        {
            axis.add(new AxisAlignedBB(new BlockPos(x, y, z + AXIS_MAX_MIN), new BlockPos(x + 1, y + 1, z + AXIS_MAX_MAX))); // south
            axis.add(new AxisAlignedBB(new BlockPos(x + AXIS_MAX_MIN, y, z), new BlockPos(x + AXIS_MAX_MAX, y + 1, z + 1))); // east
            axis.add(new AxisAlignedBB(new BlockPos(x + AXIS_MIN_MIN, y, z), new BlockPos(x + AXIS_MIN_MAX, y + 1, z + 1))); // west
            
        }
        else if (facing == EnumFacing.SOUTH)
        {
            axis.add(new AxisAlignedBB(new BlockPos(x, y, z + AXIS_MIN_MIN), new BlockPos(x + 1, y + 1, z + AXIS_MIN_MAX))); // north
            axis.add(new AxisAlignedBB(new BlockPos(x + AXIS_MAX_MIN, y, z), new BlockPos(x + AXIS_MAX_MAX, y + 1, z + 1))); // east
            axis.add(new AxisAlignedBB(new BlockPos(x + AXIS_MIN_MIN, y, z), new BlockPos(x + AXIS_MIN_MAX, y + 1, z + 1))); // west
        }
        else if (facing == EnumFacing.EAST)
        {
            axis.add(new AxisAlignedBB(new BlockPos(x + AXIS_MIN_MIN, y, z), new BlockPos(x + AXIS_MIN_MAX, y + 1, z + 1))); // west
            axis.add(new AxisAlignedBB(new BlockPos(x, y, z + AXIS_MIN_MIN), new BlockPos(x + 1, y + 1, z + AXIS_MIN_MAX))); // north
            axis.add(new AxisAlignedBB(new BlockPos(x, y, z + AXIS_MAX_MIN), new BlockPos(x + 1, y + 1, z + AXIS_MAX_MAX))); // south
        }
        else if (facing == EnumFacing.WEST)
        {
            axis.add(new AxisAlignedBB(new BlockPos(x + AXIS_MAX_MIN, y, z), new BlockPos(x + AXIS_MAX_MAX, y + 1, z + 1))); // east
            axis.add(new AxisAlignedBB(new BlockPos(x, y, z + AXIS_MIN_MIN), new BlockPos(x + 1, y + 1, z + AXIS_MIN_MAX))); // north
            axis.add(new AxisAlignedBB(new BlockPos(x, y, z + AXIS_MAX_MIN), new BlockPos(x + 1, y + 1, z + AXIS_MAX_MAX))); // south
        }

        for(AxisAlignedBB a : axis)
        {
            if(a != null && entityBox.intersects(a))
            {
                collidingBoxes.add(a);
            }
        }
    }

 

it seems to have no effect on the collisions so i'm not sure if my code is just wrong. or if i'm missing something

[V0idWa1k3r]

43 minutes ago, wannabeuk said:

            axis.add(new AxisAlignedBB(new BlockPos(x, y, z + AXIS_MAX_MIN), new BlockPos(x + 1, y + 1, z + AXIS_MAX_MAX))); // south

Don't offset the boxes by the blockpos provided to you, the game will do that for you later. Apart from that your code should work, but here is an example of mine.

[wannabeuk]

Thanks voidwalker that worked perfectly.