Patch

hi, I use the command 'patch' to create one or more strip. And I realise this function, but for now I want to add the information associated in the center of each polygon, how can I do? I found nothing similar. Thanks in advance.

Here is the code %%%%%%

figure y=[0 0 1 1;1 1 2 2]'; x=[0 10 10 0;0 10 10 0]'; c=[20 30]'; set(gca,'CLim',[0 40]); p=patch(x,y,''); set(p,'FaceColor','flat','FaceVertexCData',c,'CDataMapping','scaled'); %%%

Answer 1

[Sean de Wolski]

So you want to be able to see a smaller polygon inside a bigger one?

Use the facealpha and edgealpha properties to make the larger patch object more translucent and the inside one less translucent.

%Rendering overlay example
I1 = false(100,100,100); %First image
I1(10:90,10:90,30:70) = true; %make rectangular part of I true
[xx yy zz] = meshgrid(1:100,1:100,1:100); %second image sphere with radius 10 centered at (50,50,50)
I2 = sqrt((xx-50).^2+(yy-50).^2+(zz-50).^2)<10;

fv1 = isosurface(I1,0);  %Make the triangles
fv2 = isosurface(I2,0);

%Blue ball inside light green box
figure; hold on
patch(fv1,'facecolor',[0 1 0],'facealpha',0.3,'edgecolor','none');%[.5 .5 0],'edgealpha',0.3);
patch(fv2,'facecolor',[0 0 1],'facealpha',0.7,'edgecolor','none');
view(19,28)

[zhiping]

no, excuse me, I gave few details, there are a part of code

%%%%%%%%%%%%%%%%%%%%%%%%%%%

figure

y=[0 0 1 1;1 1 2 2]';

x=[0 10 10 0;0 10 10 0]';

c=[20 30]';

set(gca,'CLim',[0 40]);

p=patch(x,y,'');

set(p,'FaceColor','flat','FaceVertexCData',c,'CDataMapping','scaled');

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

I want to write some information associated in the centre of each strip, for example, the width of each strip( different color)... etc

[Meg Noah]

figure(); y=[0 0 1 1;1 1 2 2]'; x=[0 10 10 0;0 10 10 0]'; c=[20 30]'; set(gca,'CLim',[0 40]); p=patch(x,y,''); set(p,'FaceColor','flat','FaceVertexCData',c,'CDataMapping','scaled');
xc = mean(x); % facet centers x-value
yc = mean(y); % facet centers y-value
text(xc(1),yc(1),['Width = ' num2str(max(x(:,1)-min(x(:,1))))]);
text(xc(2),yc(2),['Width = ' num2str(max(x(:,2)-min(x(:,2))))]);