Graphics3D中的球体样式和网格间距

Question

Please consider :

colors = {Red, Green, Blue};
style = {Thickness[.01], Thickness[.01], Thickness[.01]};
cAxes = {{{0, 0, 0}, {0, 0, 1}}, {{0, 0, 0}, {0, 1, 0}}, {{0, 0, 
 0}, {1, 0, 0}}};

Graphics3D[{{#1, #2, Line@#3} & @@@ Transpose@{colors, style, cAxes}, 
Blue, Specularity[White, 3], Sphere[{.5, .5, .5}, .1]}, 
Boxed -> False, FaceGrids -> All, 
FaceGridsStyle -> Directive[Black, Dashed]]

Using Yoda`s solution on How to Style Lines

How could I color the Sphere using GrayLevel (I will manipulate it later).

And How could I have denser FaceGrids ? 10 Lines horizontally & Vertically. I also don`t understand why the Edges one are distant to one another.

Answer 1

It's always good practice to group the graphics object and its styles in a list, in case you need to quickly add another one with different styles. By that, I mean write it as {Blue, Specularity[White, 3], Sphere[{.5, .5, .5}, .1]} . Now you can easily add a GrayLevel term before Sphere and it'll work.

For the FaceGrids , I believe you'll have to manually define the lines at your desired spacing for each face. Here's an example for showing how to do it for one face.

Graphics3D[{{#1, #2, Line@#3} & @@@ 
   Transpose@{colors, style, cAxes}, {Blue, GrayLevel[0.3], Lighting -> "Neutral",
   Specularity[White, 3], Sphere[{.5, .5, .5}, .1]}}, Boxed -> False, 
 FaceGrids -> {{{0, 0, 1}, 
    Transpose@({#, #} & /@ Range[0, 1, 0.1])}}, 
 FaceGridsStyle -> Directive[Black, Dashed]]

The faces are defined as ±1 for the corresponding plane and the other two are zero. So {0,0,1} in my example corresponds to the z=1 plane.

The list supplied to FaceGrids can be easily computed for each face, instead of manually entering them, but I'll leave that to you :)

EDIT:

Since you want a uniform mesh all around, define where you want the grid lines drawn as

gridList = Transpose@({#, #} & /@ Range[0, 1, 0.1]);

Then, use the following for FaceGrids :

FaceGrids -> Join @@ Table[{RotateLeft[j {0, 0, 1}, i], gridList}, 
    {i, {0, 1, 2}}, {j, {-1, 1}}]

Here's how the result should look like with PlotRangePadding -> None :

Answer 2

In addition to Yoda's response:

• Lighting -> "Neutral" will allow grayscale object to show up as gray instead of with various colors.

• PlotRangePadding -> None will remove the spaces on the grid lines (depending on the setting for PlotRange .)

Answer 3

Yoda beat me to typing out the FaceGrids setting (see documentation ). But here is an alternative.

Instead of setting the FaceGrids setting explicitly, youcould also try setting FrameTicks , since by default the FaceGrids follow these, and then style the FrameTicks to be invisible using Opacity .