Questions tagged [3d]
For challenges involving either three-dimensional graphics, three-dimensional geometry or spatial data structures in three dimensions (e.g. octrees).
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Generate the vertices of a geodesic sphere
As in this challenge, the task is to generate the vertices of a polyhedron. The polyhedron here is the one obtained by dividing a regular icosahedron's triangular faces into smaller triangles so that ...
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How spherical is my ellipsoid?
Define the (unnormalised) Willmore energy of a surface as the integral of squared mean curvature over it:
$$W=\int_SH^2\,dA$$
For surfaces topologically equivalent to a sphere \$W\ge4\pi\$, and \$W=4\...
- 3,707
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CGAC2022 Day 22: Present stack headache, Part 2
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
Santa has a bunch of presents wrapped in cuboid boxes of various sizes. As his sled flies above a chimney, a stack ...
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CGAC2022 Day 21: Present stack headache
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
challenge idea by emanresu A
Santa has a bunch of presents wrapped in cuboid boxes of various sizes. As his sled ...
- 73.8k
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18
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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 ...
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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 ...
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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:
...
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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}...
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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 ...
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votes
4
answers
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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 ...
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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 ...
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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 ...
- 10.7k
14
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6
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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 ...
- 29.9k
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votes
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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 ...
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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 ...
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answer
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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
...
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5
votes
3
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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 ...
- 11.3k
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votes
8
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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 ...
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votes
6
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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 ...
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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 ...
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votes
8
answers
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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 ...
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votes
1
answer
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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'...
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votes
1
answer
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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 ...
user16402
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votes
8
answers
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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 ...
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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()
...
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votes
6
answers
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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 ...
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