voxel Questions
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Prologue:
This is Q&A to cover 3D triangle rasterization into voxel grid I was asked for in order to solve a different problem related to material erosion/removal during manufactoring process s...
Fabled asked 30/10, 2022 at 8:43
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I have a line-of-sight problem I need to solve by visiting all possible cells in a 3D voxel space between two (non-grid-aligned) points.
I have considered using a 3D Bresenham algorithm, but it wi...
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Imagine a volumetric cube of N³ resolution that is filled with occluding voxels. The cube could be completely filled, or contain curvy "tunnels", or walls - or just a few stray voxels; We now pick ...
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I have a voxel (np.array) with size 3x3x3, filled with some values, this setup is essential for me. I want to have rotation-invariant representation of it. For this case, I decided to try PCA repre...
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I'm trying to plot cuboids of different sizes using matplotlib, such that: after rotation the cuboids do not overlap visually in a non-physical way, the cubes have different colors and a box drawn ...
Refined asked 14/3, 2018 at 12:25
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Given a voxelization of the environment and a triangle with vertices A, B, and C, what would be the best way to determine which voxels that the triangle "occupies" or resides in? In other wor...
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I'm now building a Voxel game. In the beginning, I use a texture atlas that stores all voxel textures and it works fine. After that, I decided to use Greedy Meshing in my game, thus texture atlas i...
Daedalus asked 10/12, 2019 at 5:1
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Want to scale the voxel-dimensions with Matplotlib. How can I do this?
import numpy as np
import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import Axes3D
fig = plt.figure()
ax = fig.gca(p...
Wept asked 25/6, 2019 at 11:22
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I have 10 greyscale brain MRI scans from BrainWeb. They are stored as a 4d numpy array, brains, with shape (10, 181, 217, 181). Each of the 10 brains is made up of 181 slices along the z-plane (goi...
Tertias asked 10/3, 2018 at 14:17
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I have been reading various sources the past hours and couldn't understand how Dual Contouring works. My problem is that I don't know the meaning of "Hermite Data" and even Google and Wikipedia cou...
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In Python, given a N_1 x N_2 x N_3 matrix containing either 0s or 1s, I would be looking for a way to display the data in 3D as a N_1 x N_2 x N_3 volume with volumic pixels (voxels) at the location...
Sergeant asked 5/3, 2017 at 17:8
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I have a skeletonized voxel structure that looks like this:
The actual structure is significantly larger than this exampleIs there any way to find the closed rings in the structure?
I tried conv...
Milreis asked 26/4, 2017 at 12:11
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I am looking for an algorithm which can draw a nice looking 3D sphere on small resolution. I found Bresenham's circle algorithm but it's for 2D drawing. I just need spheres borders (I don't need it...
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Efficient method for rendering cubes with different textures on each side for a Minecraft-like game?
I'm trying to decide what the most efficient way to render a bunch of cubes with different textures in a Minecraft-like game is.
I discovered instanced rendering. What I've done is I've created a ...
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Having a 3D uniform grid, in order to save memory in large models the empty cells(those that don't overlap with any object) don't need to be saved. I am using Dictionary in c# for this purpose. Alt...
Octofoil asked 3/9, 2014 at 16:28
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What is the most efficient way of computing the gradient for fixed sized voxel data, such as the source code below. Note that I need the gradient at any point in space. The gradients will be used f...
Sclerometer asked 22/1, 2014 at 2:5
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Voxel engine (like Minecraft) optimization suggestions?
As a fun project (and to get my Minecraft-adict son excited for programming) I am building a 3D Minecraft-like voxel engine using C# .NET4.5...
Navicert asked 9/1, 2014 at 10:47
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I am doing some research into how feasible it is to use voxels to represent largish (256x256x256 voxels) battlegrounds with destructible terrain for server-hosted multiplayer games. Only one battle...
Reine asked 19/7, 2013 at 14:46
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I have recently implemented soft shadows using voxel cone tracing in OpenGL 4.3 by tracing a cone in the direction of the light and accumulating opacity values.
The key thing that I am trying to ...
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In my (Minecraft-like) 3D voxel world, I want to smooth the shapes for more natural visuals. Let's look at this example in 2D first.
Left is how the world looks without any smoothing. The terrai...
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I'm looking for a good ray-octree intersection algorithm, which gives me the leafs the ray passes through in an iterative way. I'm planning on implementing it on the CPU, since I do not want to div...
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I'm making a voxel engine in C++ and OpenGL (à la Minecraft) and can't get decent fps on my 3GHz with ATI X1600... I'm all out of ideas.
When I have about 12000 cubes on the screen it falls to und...
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Is there a way to loosely describe an object (via pattern matching finite automata, for example) in 3d voxel grid in the same way we can loosely describe patterns in one-dimensional string with reg...
Officious asked 21/9, 2011 at 20:22
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I've been searching on google, but cannot find anything basic. In it's most basic form, how is dual contouring (for a voxel terrain) implememted? I know what it does, and why, but cannot understand...
Minefield asked 26/6, 2011 at 18:31
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