How can we make a rhombus in the middle?

-my rectangle code-

fr=zeros(512,512);
row=512;
col=512;
pok1=70;
pok2=70;

for x=row/2-pok1:1:row/2+pok1
    for y=col/2-pok2:1:col/2+pok2
        fr(x,y)=1;
    end
end

I want to make the square look like a rotated shape.

I want to resize the diamond as in the code above.

What should I do?

Answer 1

[KSSV]

Play with the points in R....you give the vertices of vertices..you will get it.

fr=zeros(512,512);
% Rhombus points 
R = [350 250 ; 
    250 200 ; 
    150 250 ; 
    250 250] ; 

[X,Y] = meshgrid(1:512,1:512) ; 
idx = inpolygon(X,Y,R(:,1),R(:,2)) ; 
fr(idx) = 1 ; 
pcolor(fr)
shading interp 

[Ju Hee Hwang]

Wow:)

It was very helpful!

I got a rhombus.