For questions specific to the Graphics3D command and related 3D graphics functionality.

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10
votes
4answers
759 views

How to make a depth map from a 3D model?

Given a 3D .obj model, for example a rabbit. How can we make a depth map out of it? Any idea or help would be much appreciated.
7
votes
1answer
136 views

Strange behavior of `BoundaryMeshRegion`

BoundaryMeshRegion is new function of version 10. I am not familiar with the function. I want to decide whether a point is inside or outside in the Boundary using ...
1
vote
2answers
68 views

How to define logical expressions for platonic solids?

A more general question would be: How to find logical expressions for 3D-objects described by closed polygon sets? Finally a simple question is more prolific, therefore: How to define logical ...
10
votes
2answers
183 views

How can I decide whether a closed surface is intersected by a triangle?

A closed surface consisted of Polygons or GraphicsComplex and a triangle made by 3 points are in a 3D space. How can I decide ...
4
votes
2answers
98 views

Plotting Semi-hollow spheres [duplicate]

I wish to create a nice data representation of three nested spherical sections, with a cut away so they can be viewed. As a MWE, something like; ...
2
votes
0answers
59 views

Determining the total illumination of a polygon

Is it possible to determine the total illumination of a particular polygon with the given light sources? I truly acknowledge that Mathematica is not supposed to do this modeling, but it is what ...
1
vote
1answer
61 views

How to “merge” various graphics 2d into one 3d graphic? [closed]

I did some calculations and as result got a 2D graphic, but at the beginning of the work I used a constant parameter. What I want is to make a 3D graphic with this parameter as an axis, varying from 1 ...
2
votes
2answers
86 views

Interacting with 3D Graphics, for export [closed]

Are there any export formats which preserve the ability to interact with 3D Graphics? (In particular, the ability to rotate.) EDIT: I've found this question: How to make a 3D plot auto-rotate? ...
4
votes
1answer
83 views

Revolving an axisymmetric image for volumetric rendering

I have a series of axisymmetric images of a jellyfish swimming in fluid. Overlaid on these images are plots of the Lagrangian coherent structures associated with swimming, which highlight the fluid ...
7
votes
3answers
106 views

Ticks disappear in Graphics3D with Epilog

Normally, you can enable Graphics3D to show tick marks by doing this: Graphics3D[Sphere[], Axes -> True] But in ...
16
votes
3answers
665 views

How to get the real PlotRange using AbsoluteOptions?

The problem in general involves the unreliable behaviour of AbsoluteOptions when option values are implicitly specified (e.g. ...
8
votes
1answer
68 views

Mathematica's “POV” export format ignores ColorFunction

I was playing with xslittlegrass's Pov-Ray package and more generally with the POV-conversion function ExportString[#, "POV"] &, and noticed that ...
1
vote
0answers
49 views

Internal self-test error MLParseStream|c|297

I have been plotting time-dependent vectors. Earlier I used the following plotting options: ...
3
votes
1answer
105 views

fragment loss with ContourPlot3D

I expect to have a chimney-look plot out of the function z = 1/(x^2 + y^2), but what I got is a broken one. Is there a way to get an intact plot from ...
2
votes
2answers
118 views

Getting messages Rest::norest and Divide::indet from ContourPlot3D

Note: The bug described in this post is found in Mathematica version 9 and seems to have been fixed in version 10. Ok I don't know if it's a bug or what, but here's what I found: If I use this ...
2
votes
1answer
74 views

Graphic using manipulate runs too slow

Here is a naive coding of a projection of a point on a sphere. It runs very slow. Can it be changed to run faster without losing its essential analytic character? ...
5
votes
2answers
200 views

How to draw a box with holes using Mathematica

How to draw these two(especially the second one) graphs using Mathematica? The curve is not important.The point is how to dig some holes in a cube. BTW, These two shapes are Homotopy.
0
votes
0answers
66 views

How to make equidistant or split ListPoint [duplicate]

How to split the curve with more equidistant points? ...
5
votes
3answers
319 views

How to measure cross sectional area of Tube

I have modified my question to a simple version. I have vertex clusters, polygons and a list of center points. Attached pts and polygons of 3d tube are: ...
4
votes
2answers
171 views

Extrude 2D cross-section to 3D shape with shrinkfactor

I would like to create a 3D shape from extrusion and scaling of a 2D contour. The 2D contour that I have looks like this: and it consists of a bunch of points (here plotted with ...
0
votes
0answers
58 views

Finding Symmetries of Points on a Sphere

Currently, I am working on a project where I would like to find symmetries of points plotted on a sphere. One example would be to rotate the sphere 180 degrees about the x-axis and the picture would ...
1
vote
1answer
136 views

Error message: Coordinate index 0 is out of range for the enclosing GraphicsComplex

I am unable understand following error message: Coordinate index 0 is out of range for the enclosing GraphicsComplex. How to fix it? Attached data here: pts and polygons. See also end of question. ...
6
votes
2answers
381 views

How to get UV mapping of 3D tube

Here is cylinder data: file We can mesh the surface, thanks to lalmei, Belisarius and Simon (link) How to achieve uv mapping from a 3d straight and curved tube? Working code: ...
2
votes
1answer
80 views

How to draw a 3D convex hull of a set of points with styling

I´m trying to obtain the convex hull (with transparent faces) of a small number of points. I would like the Plot to have the points shown with small spheres numbers 1, 2, 3, ... along the axes ...
2
votes
1answer
197 views

Game of Life in 3D

Is there a three-dimensional cellular automaton that in some sense generalizes Conway's Game of Life? If so, how might we use the CellularAutomaton command to ...
2
votes
2answers
131 views

Are there built-in functions for testing if a point lies within Graphics3D primitives?

I noticed in this question, Behavior of Graphics`Mesh`InPolygonQ with self-intersecting polygons, that Mathematica has some "psuedo-hidden" functionality for allowing one to quickly perform a winding ...
8
votes
3answers
944 views

Convex hull of a 3D object?

I am trying to find a convex hull command for a Graphics3D object. Does it exist in Mathematica? ...
1
vote
0answers
96 views

Opacity limitations?

Trying to make a better-looking globe model, I start off with something like this To enhance the 3D effect, I want the lines further from the eye to be "grayer" than the lines closer to the eye, as ...
3
votes
1answer
140 views

Add contour lines to Graphics3D

I am writing the following code: ...
5
votes
3answers
469 views

Increase 3D Graph thickness for 3D printing in Mathematica?

My code: Plot3D[{(2*x*y)/(x^2 + y^2)}, {x, -2, 2}, {y, -2, 2}] Output: And now I can export this to STL by using the export STL command, however, when I try ...
7
votes
1answer
247 views

Graphics3D from Mathematica to SolidWorks (for 3D-printing)

I have an 3D Graphic generated with Mathematica's Graphics3D, and want to use it later in SolidWorks. SolidWorks files are usually *.stp, *.step, *.stl extentions. google search hasn't given me a ...
3
votes
3answers
227 views

Is Mathematica compatible with primusrun?

I use Mathematica 9 on Ubuntu 12.04 LTS x86 (64-bit). My computer has an Nvidia graphics card, for which I installed primus and ...
1
vote
0answers
54 views

Moving two Spheres in the Opposite Direction [closed]

We know that we can achieve to a box contained two spheres by the code: Graphics3D[Table[Sphere[{i, Mod[i^2, 10], Mod[i^3, 12]}], {i, 2}]] How can the left ...
2
votes
2answers
82 views

How to export 3D graphics to Collada (.dae) format?

I'm looking for a way to export 3D graphics objects to the Collada (.dae) format. I need an automated way, i.e. using Blender to manually convert from another ...
2
votes
1answer
69 views

Coloring a set of polygons, each polygon to have a specific color

In addition to my previus post, regarding plotting the surface of a Möbius strip, I now realised, that some of the eigenmodes for a Möbius strip are either oscillations of a scalar field OR a vector ...
5
votes
1answer
152 views

How to add texture to solid Graphics3D object such as cylinder?

I'd like to add texture to a Cylinder inside Graphics3D. I can't see how to use FaceForm and ...
6
votes
1answer
162 views
1
vote
1answer
46 views

Plotting a multivariable function [closed]

m[x_, y_] := 0.9*Exp[-((x - 1)^2 + (y - 1)^2)] + 0.5 Exp[-(3^2 ((x - 2.5)^2 + (y - 1.5)^2))] I'm trying to create a 3d plot for the function above. I tried ...
3
votes
1answer
84 views

How to color a BSplineSurface

I am trying to color a BSplineSurface in a complex way but not having any luck using ColorFunction. I can use ...
1
vote
0answers
126 views

Processing Collada file

I have this [collada file][1]. Answer: Thanks to : Yves Klett http://stackoverflow.com/questions/6246392/importing-google-sketchup-models-in-mathematica
38
votes
1answer
1k views

How to construct a treemap using non-rectangles?

I've written the standard version of a tree map (a graphic that shows nested data) and I'm looking to improve on this layout by switching to different types of polygons or perhaps circles. Can anyone ...
3
votes
2answers
121 views

How can I get Inset to use ImageScaled, but preserve aspect ratio?

This code produces two identical images, despite the difference in the rectangles: ...
2
votes
2answers
598 views

Using ChemicalData to make molecule graphics

I would like to take the acetone $((CH_3)_2CO)$ and chloroform $(HCl_3)$ molecules that Mathematica's chemical data provides, and plot them together. I want to show how chloroform can hydrogen bond ...
14
votes
6answers
489 views

How can I suppress rotation of 3D graphics?

Given a 3D image built of a combination several Graphics3D objects, is it possible to suppress rotation of the displayed image by the mouse? To be specific, here ...
11
votes
4answers
670 views

Is there a way to increase the smoothness of a cylinder?

I am using Cylinder to produce wide flat disks (in Mathematica 8). This works just fine except that the circular base of such a cylinder turns out to be really just ...
1
vote
1answer
51 views

plotting 3d points: z-axis is squashed

I am plotting 3D points and it occurs to me that Mathematica doesn't have an easy way to specify my points to be plotted in a uniformly scaled cartesian space. For example I plotted ...
14
votes
5answers
3k views

How to draw an ellipse arc in 3D?

There is no Circle or Disk object in 3D. I quickly found a way to use Cylinder (thin lines, no faces, very flat): ...
20
votes
2answers
573 views

How to get shadows in Graphics3D?

It was a shock to me when I found that in Graphics3D a surface is always transparent to the light sources: ...
0
votes
1answer
32 views

using 'steps' in Manipulate

I want to make a 3D shape move through a specified graph; e.g. y = Sin[x], such that it moves up and down. My working so far has ...
17
votes
3answers
2k views

How to calculate volume of convex hull and volume of a 3D object

I have a set of random 3D data points. How can I calculate the volume of the convex hull?