voxels | Build stuff from simple voxels | Graphics library

I would like to voxelise a .stl file and write it into an np.array. The resolution of the voxels should be adjustable. Here is my code for this:

I'm trying to generate a .vox represantation of my Prison Architect save file. I'm using a library called voxelfuse to generate the voxels and for some reason the union() method gives me a can only concatenate str (not "int") to str Here's my code:

Is there any good way to downsample voxels grid in OpenVDB?

For example I have grid 8x8x8 with voxel size - 1.0, and I want to get grid 4x4x4 with voxel size - 2.0: each voxel of new grid is some interpolation of original voxels, e. g. [0,0,0] voxel of new grid is average value of [0,0,0]-[1,1,1] (8 voxels) of original grid)

P.S. There is way to do it manually but I bet openvdb has its own implementation

I am trying to implement marching cubes into my game, and so far I have set up a system for drawing triangles with four points in world space. I have got the system working where I set the points, but then when I draw the two triangles to make it a mesh, it only draws one, but I set up a print() statement, and it shows that 2 triangles are drawn each time, so that is normal. I can't figure out what I need to do. Here is my code, and comment on this post if you need any more pics/code:

I have a stack of 1000 images with more than 120k objects. After running a Connected Component Algorithm in a third party software, I obtained a coloured image, in which each connected object has a label, a color and an ID value assigned.

I need to extract the list of the voxels coordinates that make up each of the objects.

I have written a Python code to extract this information but it is extremely slow since it processes ~30 labels/min. Therefore, it would take more than 2 days to process the entire scan in the best scenario.

After converting the stack into a 3D Numpy array (img_stack_numpy), here is the main part of the code:

I am working with volume data in raw format. I think that it is basically a 3D matrix of voxels that I want to load into a 3D array. I have no experience with this, and I’m unable to find much information on how it is done. My main problem is that I don’t really understand what the data represents.

So what I’m asking really if anybody can help me to understand the data and load it into a 3D array with Java.

I'm trying to build a voxel engine, and to do this I have to create hundreds of thousands of voxels, and I was hoping I could use instanced rendering. However, on rendering, the shape is completely disfigured, and not the expected cube shape:

And with several voxels:

This is what my code looks like:

chunk.hpp

I'm trying to build a voxel engine, and to do this I have to create hundreds of thousands of voxels, and I was hoping I could use instanced rendering. However, the drawing is very unexpected. I'm primarily following the LearnOpenGL guide.

When rendering each voxel individually, the program works fine:

However, when using instanced rendering...

Another angle...

I'm trying to render the voxels in a big chunk, so this is what my code looks like:

voxel.hpp

I am trying to have a gameobject in unity react with sound if another object is inside it. I want the gameobject to use the entering objects location to then see what voxel is closest and then play audio based on the voxel intensity/colour. Does anyone have any ideas? I am working with a dataset that is 512x256x512 voxels. I want it to work if the object is resized as well. Any help is much appreciated :).

The dataset I'm working with is a 3d .mhd medical scan of a body. Here is how the texture is added to the renderer on start: