improving the creation of subpolygons

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Riccardo Tronconi
Riccardo Tronconi il 29 Lug 2021
Commentato: Adam Danz il 31 Lug 2021
HI guys! I have a macro-polygon 10x10 and I would like to divide it into 25 equal parts of width and height equal to 2. So far I have created this lines of code but I was wondering if there is a much efficient way to implement it.
pgon = polyshape([0 0 10 10],[10 0 0 10]);
plot(pgon);
p(1) = rectangle('position', [0,0,2,2] );
p(2) = rectangle('position', [2,0,2,2] );
p(3) = rectangle('position', [4,0,2,2] );
p(4) = rectangle('position', [6,0,2,2] );
p(5) = rectangle('position', [8,0,2,2] );
p(6) = rectangle('position', [0,2,2,2] );
p(7) = rectangle('position', [2,2,2,2] );
p(8) = rectangle('position', [4,2,2,2] );
p(9) = rectangle('position', [6,2,2,2] );
p(10) = rectangle('position', [8,2,2,2] );
p(11) = rectangle('position', [0,4,2,2] );
p(12) = rectangle('position', [2,4,2,2] );
p(13) = rectangle('position', [4,4,2,2] );
p(14) = rectangle('position', [6,4,2,2] );
p(15) = rectangle('position', [8,4,2,2] );
p(16) = rectangle('position', [0,6,2,2] );
p(17) = rectangle('position', [2,6,2,2] );
p(18) = rectangle('position', [4,6,2,2] );
p(19) = rectangle('position', [6,6,2,2] );
p(20) = rectangle('position', [8,6,2,2] );
p(21) = rectangle('position', [0,8,2,2] );
p(22) = rectangle('position', [2,8,2,2] );
p(23) = rectangle('position', [4,8,2,2] );
p(24) = rectangle('position', [6,8,2,2] );
p(25) = rectangle('position', [8,8,2,2] );
Many thanks to all in advance!!
  1 Commento
Adam Danz
Adam Danz il 31 Lug 2021
There are much easier ways to accomplish this but based on your comment in a related thread, it sounds like you don't need to display the rectangles at all.

Accedi per commentare.

Risposte (1)

Steven Lord
Steven Lord il 29 Lug 2021
Divide visually or computationally?
big = polyshape([0 10 10 0 0], [0 0 10 10 0]);
p = repmat(big, 5, 5); % Preallocate
edges = 0:2:10;
for x = 1:(numel(edges)-1)
E1 = edges(x + [0 1 1 0 0]);
for y = 1:(numel(edges)-1)
E2 = edges(y + [0 0 1 1 0]);
p(x, y) = polyshape(E1, E2);
end
end
figure
plot(big)
figure
plot(p(1:2:25), 'EdgeColor', 'k')
Note that by the way I constructed the elements of p, the first one is in the lower-left corner.

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