Error using patch Value must be of numeric type and greater than 1.

Hi, i need to figure some stl files and it's giving me an error

Error using patch

Value must be of numeric type and greater than 1.

Error in rysujPATCH (line 63)

czlon11=patch('Faces',C11.Faces,'Vertices',C11.Vertices,'FaceColor',C11.FaceColor);

matrixes are included

this is the code

%%
% Rysuj czlony


P2=C2.Vertices';

Unable to resolve the name 'C2.Vertices'.

P3=C3.Vertices';

% ustawianie czlonow

P2=F12(0)*[P2; ones(1, size(P2, 2))];
%
C2R=C2;
%
C2R.Vertices=P2(1:3,1:size(P2, 2))';
%
P3=F12(0)*F23(0)*[P3;ones(1,size(P3, 2))];
%
C3R=C3;
C3R.Vertices=P3(1:3,1:size(P3, 2))';
%% rysowanie

figure(1);
axis([-100,400,-100,400,-100,700]);
grid on;
hold on;
%
czlon11=patch('Faces',C11.Faces,'Vertices',C11.Vertices,'FaceColor',C11.FaceColor);
%%
%czlon12=patch(C12);
czlon12=patch('Faces',C12.Faces,'Vertices',C12.Vertices,'FaceColor',C12.FaceColor);
%
%czlon2=patch(C2R);
czlon2=patch('Faces',C2R.Faces,'Vertices',C2R.Vertices,'FaceColor',C2.FaceColor);
%
%czlon3=patch(C3R);
czlon3=patch('Faces',C3R.Faces,'Vertices',C3R.Vertices,'FaceColor',C3.FaceColor);

clear P2 P3 C2R C3R

I've already add +1 to whole faces matrix and still no luck.

Please help

EDIT: I've exported the stl files from SOLIDWORKS 2024

[Dyuman Joshi]

What are these commands supposed to do?

F12(0)

F23(0)

Are these parameters arrays or functions?

[TheIOzikI]

function [F]=F12(fi2) 
F=[C12(fi2),[0 0 0]';
   [0 0 0 1]];

%%
function [F]=F23(fi3) 
F=[C23(fi3),[50 0 0]';
   [0 0 0 1]];
%%
% trajektoria 1
fi1=[0:1:360];
fi2=30+20*sin(10*fi1*pi/180);
fi3=60*sin(20*fi1*pi/180+15*pi/180);

[Dyuman Joshi]

What are C12 and C23?

Please provide everything needed to run your code.

[TheIOzikI]

these are matrixes. I've attatched it

• matrixes.mat

[Dyuman Joshi]

C23 is not defined in the file attached.

[TheIOzikI]

function [C]=C12(fi2) 
C=[cos(fi2) -sin(fi2) 0;
   0         0       -1;
   sin(fi2)  cos(fi2) 0];
function [C]=C23(fi3) 
C=[cos(fi3) -sin(fi3) 0;
   sin(fi3)  cos(fi3) 0;
   0         0        1];

Answer 1

[Star Strider]

I was not able to get these to work with patch (I still do not understand what that problem is), however with a minor modification, I was able to get them to work with the trisurf function —

load('matrixes.mat')
whos

  Name        Size            Bytes  Class     Attributes

  C11         1x1              2448  struct              
  C12         1x1             29352  struct              
  C2          1x1             30960  struct              
  C3          1x1             30960  struct              
  ans         1x37               74  char                
  cmdout      1x33               66  char                

% [vl,vu] = bounds(C11.Vertices)
% [r,c] = size(C11.Faces)
% [vl,vu] = bounds(C12.Vertices)
% [r,c] = size(C12.Faces)
% [vl,vu] = bounds(C2.Vertices)
% [r,c] = size(C2.Faces)
% [vl,vu] = bounds(C3.Vertices)
% [r,c] = size(C3.Faces)

figure
trisurf(C11.Vertices-1, C11.Faces(:,1), C11.Faces(:,2), C11.Faces(:,3), 'FaceColor',C11.FaceColor)%, 'EdgeColor',C11.FaceColor)
title('C11')

figure
trisurf(C12.Vertices-1, C12.Faces(:,1), C12.Faces(:,2), C12.Faces(:,3), 'FaceColor',C12.FaceColor)%, 'EdgeColor',C12.FaceColor)
title('C12')

figure
trisurf(C2.Vertices-1, C2.Faces(:,1), C2.Faces(:,2), C2.Faces(:,3), 'FaceColor',C2.FaceColor)%, 'EdgeColor',C2.FaceColor)
title('C2')

figure
trisurf(C3.Vertices-1, C3.Faces(:,1), C3.Faces(:,2), C3.Faces(:,3), 'FaceColor',C3.FaceColor)%, 'EdgeColor',C3.FaceColor)
title('C3')

EDIT — (20 Jan 2024 at 15:16)

Experimenting with the surface lighting —

figure
trisurf(C11.Vertices-1, C11.Faces(:,1), C11.Faces(:,2), C11.Faces(:,3), 'FaceColor',C11.FaceColor, 'EdgeColor','none')
lightangle(-45, 25)
lighting('flat')
title('C11')

figure
trisurf(C12.Vertices-1, C12.Faces(:,1), C12.Faces(:,2), C12.Faces(:,3), 'FaceColor',C12.FaceColor, 'EdgeColor','none')
lightangle(-45, 25)
lighting('flat')
title('C12')

figure
trisurf(C2.Vertices-1, C2.Faces(:,1), C2.Faces(:,2), C2.Faces(:,3), 'FaceColor',C2.FaceColor, 'EdgeColor','none')
lightangle(45, 65)
lighting('flat')
title('C2')

figure
trisurf(C3.Vertices-1, C3.Faces(:,1), C3.Faces(:,2), C3.Faces(:,3), 'FaceColor',C3.FaceColor, 'EdgeColor','none')
lightangle(45, 65)
lighting('flat')
title('C3')

.

[TheIOzikI]

That's almost good.

any idea why the holes aren't round?

It looks squished :P

[Stephen23]

"any idea why the holes aren't round?"

The holes are round: look at the axes ranges.

If you want the axes ranges displayed with equal lengths for each unit then call

axis equal

[TheIOzikI]

That worked thanks. I'm quite new in matlab. I've other issue but that needs next ticket

[Star Strider]

Experiment with the lightangle arguments to get the result you want —

load('matrixes.mat');

figure
trisurf(C11.Vertices-1, C11.Faces(:,1), C11.Faces(:,2), C11.Faces(:,3), 'FaceColor',C11.FaceColor, 'EdgeColor','none')
hold on
trisurf(C12.Vertices-1, C12.Faces(:,1), C12.Faces(:,2), C12.Faces(:,3), 'FaceColor',C12.FaceColor, 'EdgeColor','none')
trisurf(C2.Vertices-1, C2.Faces(:,1), C2.Faces(:,2), C2.Faces(:,3), 'FaceColor',C2.FaceColor, 'EdgeColor','none')
trisurf(C3.Vertices-1, C3.Faces(:,1), C3.Faces(:,2), C3.Faces(:,3), 'FaceColor',C3.FaceColor, 'EdgeColor','none')
lightangle(45, 65)
lighting('flat')
% material('metal')
hold off
axis('equal')
view(-45, 20)
Ax = gca;
Ax.Visible = 0;
sgtitle('Assembled Segments')

.