fill rectangles with colors

Question

ahmed noori 2020-8-4

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https://ww2.mathworks.cn/matlabcentral/answers/575125-fill-rectangles-with-colors

评论： ahmed noori 2020-8-5

regtangles withot.fig

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hello ..

i used this instraction to plot rectangles with defrent colors ..i need help to fill those rectangles with colors .>>

thanks for hellllp :)

.plot([posx posx+Element(i).W posx+Element(i).W posx posx],...
          [posy posy posy+Element(i).H posy+Element(i).H posy],...
          '-','color',cl(i,:))

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Answer 1

Sudheer Bhimireddy 2020-8-4

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Try this:

With the vertices you have, create surfaces and adjust the Z value to see the overlap. However, this way hides the overlapped regions and shows only the top most surface as shown in the attached image.

h=figure;
surf([0 1;0 1],[0 0;1 1],[1 1;1 1]);
hold on;
surf([0 2;0 2],[0 0;2 2],[1 1;1 1]-0.01);
surf([1.4 1.8;1.4 1.8],[1.4 1.4;1.8 1.8],[1 1;1 1]+0.01);
surf([0.7 1.2;0.7 1.2],[0.7 0.7;1.2 1.2],[1 1;1 1]+0.02); 
view([0 90]);

Result:

Hope this helps.

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ahmed noori 2020-8-5

thanks ..i ll try it

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Answer 2

Image Analyst 2020-8-4

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https://ww2.mathworks.cn/matlabcentral/answers/575125-fill-rectangles-with-colors#answer_475234

Did you try the rectangle() function? It has options for 'FaceColor', and 'EdgeColor'.

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Sudheer Bhimireddy 2020-8-5

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If you are using rectangle() inside the loop and have manageable number of them, make sure to alter the 'FaceColor' and 'EdgeColor' properties each time the method is invoked.

% this way you will have more control over coloring them
edge_colors = {'k','r','b','m','g','c'};
face_colors = {'k','r','b','m','g','c'};
h = figure;
clf;
hold on;
for i =1:n
 rectangle([ ],[ ],'FaceColor',face_colors{i},'EdgeColors',edge_colors{i});
end

ahmed noori 2020-8-5

thank you ..it was so useful

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Answer 3

Image Analyst 2020-8-5

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Try this:

numRects = 20;
positions = rand(numRects, 4); % Positions = [x, y, width, height]
% this way you will have more control over coloring them
edge_colors = rand(numRects, 3);
face_colors = rand(numRects, 3);
h = figure;
clf;
hold on;
for k = 1 : numRects
	rectangle('Position', positions(k, :), 'FaceColor',face_colors(k, :),'EdgeColor',edge_colors(k, :), 'LineWidth', 2);
end
grid on;