How can i use transparency parametr in plot3 or other method to make my plot semi transparency

I want to make my plot3 semi transparency

l1=20;l2=50;l3=40;
t1=linspace(-180,180,45)*pi/180;
t2=linspace(-180,180,45)*pi/180;
t3=linspace(-180,180,45)*pi/180;
[T1,T2,T3]=ndgrid(t1,t2,t3);
xM = round(l2*cos(T1).*cos(T2)+l3*cos(T1).*cos(T2+T3));
yM = round(l2*sin(T1).*cos(T2)+l3*sin(T1).*cos(T2+T3));
zM = round(l1+l2*sin(T2)+l3*sin(T2+T3));
w=plot3(xM(:),yM(:),zM(:),'b.','LineWidth',0.3)

i have try

w.color(4)=0.5

and changing Alpha paremetr but it didnt work

Thanks for your help

Answer 1

[jonas]

You can play around with some hidden marker properties.

%get marker handles
   markers=w.MarkerHandle;
%change transparency by altering 4th element
   markers.EdgeColorData=uint8([0 0 255 50])'

edit: You have to add drawnow before those two lines of code

Read more here ( link ).

[Maciej Zareba]

w.color(4)=0.5 is exacly marker and its not working (2014 and newer version of matlab create marker by .)

[jonas]

What do you mean not working? Is the attached result not what you are looking for?

[Maciej Zareba]

Can you give me all code to generate what u have shown in this png ?

[jonas]

For some reason it only works for me if I write those two lines of code in the command window after I execute your script. Dont ask my why that is the case...

Use alpha of 20-30 to get the same result as the previous attachment.

[Maciej Zareba]

Its puzzle taht it doesnt work in script but work in comand window. How would you use it with alpha on script ?

[jonas]

Dont know. Maybe someome smarter than me can chime in.

[Maciej Zareba]

Still thanks for half an anwser

[jonas]

No problem. Maybe these will help you

https://se.mathworks.com/matlabcentral/answers/249044-code-fails-to-run-in-function-works-in-command-window-works-in-debug-evaluate-selection

https://se.mathworks.com/matlabcentral/answers/90391-the-command-is-working-perfectly-in-the-command-window-but-not-as-a-script

[Maciej Zareba]

I found out one more think. When you zoom in or out it disables transparency effect.

[jonas]

btw, I have updated the answer to fix the previous issue with command not working in script.

I don't have a fix for your most recent issue. If you want to pan/rotate, the transparancy is reset and you must manually update it. If you want to print a specific view, just change the view() in the script before changing the transparency.

[Maciej Zareba]

Ye zooming in / out and then copy paste last line fix it 2