Questions tagged [3d]
For challenges involving either three-dimensional graphics, three-dimensional geometry or spatial data structures in three dimensions (e.g. octrees).
22
questions
21
votes
18answers
4k views
Convince me Gabriel's Horn is possible
From Wikipedia, Gabriel's Horn is a particular geometric figure that has infinite surface area but finite volume. I discovered this definition in this Vsauce's video (starting at 0:22) where I took ...
36
votes
20answers
7k views
I give you ascii-art, you make it pseudo-3d
Do you know the optical effect of a tridimensional hand painted whit horizontal lines?
Examples
This challenge consists of making something like that effect with ascii, and transforming one 2d input ...
21
votes
26answers
3k views
Print a 3D shape
Write a program or a function to print the following cube (if you allow me to call it so) in different sizes:
...
11
votes
5answers
617 views
Ellipsoid surface area
Related: Ellipse circumference
Introduction
An ellipsoid (Wikipedia / MathWorld) is a 3D object analogous to an ellipse on 2D. Its shape is defined by three principal semi-axes \$a,b,c\$:
$$ \frac{x^2}...
16
votes
7answers
1k views
Counting painted sides of cubic shapes
Sandbox
Many of us have seen math problems where a shape made of unit cubes is dipped in paint, and the answer is the number of painted sides. We'll generalize that problem in this challenge.
Input
A ...
14
votes
4answers
930 views
Reconstruct a 3d arrangement of cubes from two of its projections
Setup
Take the following 4x4x4 cube along with a 2D view of 3 of its faces, with a common 1x1x1 cube highlighted:
The arrows ...
20
votes
2answers
1k views
Golf Lathe Machine
You probably know what a Turing Machine is but do you know what is a Turning Machine (lathe)?
Ok you already know.. and what about a Golf Turning Machine ??
Ok I tell you..
A Golf Turning Machine is ...
18
votes
2answers
1k views
ASCII TURNED SHAPE
How can we depict a turned shape simply and nicely using ascii characters in 3D space?
I suggest this method :
Instead of a circle we use a square rotated by 45° for the cutting section so that we ...
14
votes
6answers
799 views
Binary self-rotation
Given a binary 3D array, for each layer, cyclically rotate up each of its columns as many steps as indicated by the binary encoding of the columns of the layer above it, and then cyclically rotate ...
31
votes
2answers
781 views
Will Mario fall into the Shrinking Satellite? (Diagram added)
Super Mario Galaxy features two rhombicuboctahedron-shaped* planets tiled with platforms that shrink as Mario runs across. Should Mario fall into a triangular hole or a gap left by a tile he ...
0
votes
1answer
1k views
Menger Sponge Generator [duplicate]
Challenge
My challenge, is for you to generate a Menger Sponge based on the level/iteration given. You need to draw it in ...
25
votes
1answer
1k views
Totally Cubular
Create a program or function to unjumble a 9x9x9 cube of digits by rotating individual 3x3 cubes within it.
This is similar to (but, I suspect, a bit harder than) my Flippin' Squares question.
Input
...
5
votes
3answers
245 views
Contiguous Block Count
Count the number of contiguous blocks within a given 3D input.
Input
The input will consist of one or more rectangles of characters separated by blank lines. Each rectangle represents a cross ...
21
votes
8answers
873 views
Wrap a seasonal present
Task
Given a wrapper element and a non-jagged 3D array, wrap the array top, bottom, and all-around. You must handle both character and numeric data, but the wrapper and the present will have the same ...
4
votes
6answers
420 views
Find the intersection point of a plane and ray
Given a ray with a point and a vector and a plane with a point and a normal vector to the plane. You have to find the intersection point of the plane and the ray..
So your job if you choose to accept ...
12
votes
3answers
2k views
Draw a simple cube
We don't have a single challenge about drawing a real 3 dimensional cube, so here it goes:
Challenge
Your task is to draw a rotated, cube with perspective. It can be in a separate window or as an ...
13
votes
8answers
530 views
Typesetting multidimensional labels
In a steam-punk multidimensional world, our boss wants to affix printed index labels to each drawer in our conglomerate's multidimensional file cabinet.
The boss wants to typeset the entire label ...
16
votes
1answer
3k views
Ray-trace a shiny sphere
I downloaded POV-ray and rendered this shiny metal sphere 90s style:
Your task is to do the same thing, but to do it by implementing the rendering engine yourself in as few bytes as possible. You don'...
3
votes
1answer
393 views
GPS: Golfed Positioning System
Your mission, should you choose to accept it, is to write code for a GPS receiver.
Input
The current time, as nanoseconds from the Unix epoch. [EDIT: This is optional, please state whether you ...
16
votes
8answers
815 views
Tetrahedron Surface Area
The challenge
This challenge is very straightforward. Given four 3-dimensional points, calculate the surface area of the tetrahedron that they form. This is code-golf, so shortest code wins. Standard ...
32
votes
10answers
11k views
3D: Discrete Dogfighting Duel (Now open to non Java submissions)
UPDATE: isSuicidal() was added to the plane class, this allows you to check if a plane is on an irreversible collision course with the walls!!
UPDATE: updateCoolDown() separated from simulateMove()
...
34
votes
6answers
3k views
Check if three letters can form a "Godel-Escher-Bach cube"
This question is inspired by the cover of the book "Godel, Escher, Bach":
The challenge here is to write a function that tells if three given letters can produce a 3D sculpture that can be read from ...
