How to fill a 3D plot?

Hello everyone,

I have the following code showing a square. What I have to do to get it filled?

Many thanks!

figure
X = [0,0,1,1; 1,0,1,1; 1,0,1,1; 1,0,1,0];
Y = [0,0,0,1; 0,1,1,1; 0,1,1,1; 0,1,1,1];
Z = [1,1,1,1; 1,1,1,1; 1,1,1,1; 1,1,1,1];
C=[1,1,1,1;1,1,1,1;1,1,1,1;1,1,1,1];
fill3(X,Y,Z,C);

Answer 1

[John BG]

Stephan

1st

your code is confusing because your are not defining 1 square, you are defining 4 squares

2nd

it is already filled, let me explain:

when you generate a surface with commands like fill3 patch surf surface

all you have to do is to collect the handle, for instance

h1=fill3(X,Y,Z,C)
 4x1 Patch array:

Patch
Patch
Patch
Patch

as you can see, with your current X Y Z you have 4 overlapped patches.

When attempting to change parameters like transparency and face colour, it can get confusing, so let's simplify

X = [0,1,1,0];
Y = [0,0,1,1];
Z = [1,1,1,1];

h2=fill3(X,Y,Z,[0 0 1])

note that the order of introduction of points matters, if you jump to an opposite vertex the square will look like a bow tie.

To change color and transparency all you have to write in example:

h2.FaceColor=[1 0 0]

h2.FaceAlpha=0.3

if you find these lines useful would you please mark my answer as Accepted Answer?

To any other reader, please if you find this answer of any help, click on the thumbs-up vote link,

thanks in advance for time and attention

John BG

<mailto:[e-mail] [e-mail]>

[Stephan]

Many thanks for this good explanation!

[Vikash Chaurasia]

Excellent solution. Many thanks!

[Vikash Chaurasia]

Could you please tell how to extract mesh data from the handle h1=fill3(X,Y,Z,C) and export it in the text file ? I need the coordinates of the points on the surface created by fill3 command. Thank you very much!

Answer 2

[michio]

I am not sure what you want but if you simply want to create a filled square

 X = [0; 1; 1; 0];
 Y = [0; 0; 1; 1];
 Z = [1; 1; 1; 1];
 C=[0; 0.25; 0.50; 0.75];

C needs to be a vector or matrix of indices into the current colormap.