[1.14.4] [Solved] Bounding Box

[BudRunBun 0]

I have a block with shape of right triangular prism. How do I create BB for it(I saw only voxel shapes which are cubes and I don't know how to make a side which is rotated)?

Edited July 23, 2020 by BudRunBun

[BudRunBun 0]

I know that it is in fact possible to construct a triangle out of infinitely many rectangles but I believe that there is a more convenient way to do this.

Edited July 21, 2020 by BudRunBun

[matt1999rd 3]

for voxelshape it is impossible to make diagonal shape unfortunately. But what you can do is make cuboid that match your form correctly but I don't know if it is what you want..

[BudRunBun 0]

I just want BB that will match my texture

[BudRunBun 0]

1 hour ago, matt1999rd said:

for voxelshape it is impossible to make diagonal shape unfortunately. But what you can do is make cuboid that match your form correctly but I don't know if it is what you want..

How do I do that?

[matt1999rd 3]

you can use blockbench to visualised your bounding boxes and then add them with block.makecuboidShape to get one box and then VoxelShapes.or to make a shape that is the sum of multiple voxelshapes.

[BudRunBun 0]

This works but it looks like an overkill solution

//number of partitions
private static final int n = 150;
private static VoxelShape shape = VoxelShapes.empty();

static {
    //creating triangular shape of rectangles
    for (int p = 0; p < n; p++) {
        shape = VoxelShapes.or(shape, VoxelShapes.create((double) p / n, 0.0D, 0.0D, (double) (p + 1) / n, (double) (p + 1) / n,  1.0D));
    }
}

[BudRunBun 0]

Now I have 2 problems:

1)When I break it it produces ton of particles

2)It has a very unpleasant shade from rotated side(Don't pay attention to the texture, it is only for testing)

Edited July 21, 2020 by BudRunBun

[Draco18s 2401]

Don't use such small slices.

[BudRunBun 0]

But how do I make a triangle then?

[Draco18s 2401]

You can't. And the reason it goes "sorta gray" is because you have 150 edges there.

Vanilla only uses three for the lecturn!

[poopoodice 109]

You can't afaik. For example lectern's bounding boxes is a combination of  +-4 cubes, and even entities' bounding boxes they can't and they don't rotate.

[BudRunBun 0]

Okay, I will lower the number of partitions. Is there any way not to display BB? It looks bizarre.

Edited July 22, 2020 by BudRunBun

[vemerion 56]

5 hours ago, BudRunBun said:

Is there any way not to display BB

You could cancel the HighlightBlock event to hide the bounding box.

Edited July 22, 2020 by vemerion
Corrected event name

[BudRunBun 0]

Is it in theory possible to make a BB via custom algorithm(convex hull) or things are hard-coded with voxelshapes?

Edited July 23, 2020 by BudRunBun

[vemerion 56]

3 hours ago, BudRunBun said:

Is it in theory possible to make a BB via custom algorithm(convex hull) or things are hard-coded with voxelshapes?

As far as I know, voxelshapes are the way to go.

[Draco18s 2401]

6 hours ago, BudRunBun said:

Is it in theory possible to make a BB via custom algorithm(convex hull) or things are hard-coded with voxelshapes?

Here's a hint: Axis Aligned Bounding Boxes are:

(1) Axis aligned. This means no rotation.

(2) Boxes. This means they are cuboids.

 

VoxelShape is just a wrapper around a list of AABBs providing various helper methods.

[BudRunBun 0]

Yes but getShape() method in Block class return VoxelShape and I can't make it return sth else

[Draco18s 2401]

You can't just go around changing the return type. That's not how programming works.