How to shift and re plot 4 rectangles ?

Question

Luis Garcia 2018-7-2

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/408428-how-to-shift-and-re-plot-4-rectangles

评论： Luis Garcia 2018-7-2

I have a rectangle xrect = [x1 x2 x3 x4 x1]; yrect = [y1 y2 y3 y4 y1];
I have plotted the rectangle, but I need to shift it by 10, to make for different rectangle in different positions, so that each new rectangle centroid will be the corner of the xrect,yrect original rectangle.
Some code I have:
shift = 10;
xyrect = [xrect; yrect];
shiftsRec = [xyrect(1)-[shift,0]; xyrect(2) + [shift,0]; xyrect(3) - [0,shift]; xyrect(4) + [0,shift]];
for i=1:4
   temp = shiftsRec(i,:);
   newRect(i) = [xyrect * temp];
   plot(newRectangles);
end

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Answer 1

Aquatris 2018-7-2

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/408428-how-to-shift-and-re-plot-4-rectangles#answer_327175

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Is this what you are trying to achieve?

x1 = -10;x2 = 10;x3 = 10;x4 = -10; y1 = -15; y2 = -15;y3 = 15;y4 = 15;
xrect = [x1 x2 x3 x4 x1] ; yrect = [y1 y2 y3 y4 y1] ; % original rectangle centered at [0,0]
shift = 5;
scale2 = 0.5; % change the size of the additional rectangle, originals' size is 1
scale3 = 0.2; % change the size of the additional rectangle, originals' size is 1
scale4 = 0.8; % change the size of the additional rectangle, originals' size is 1
scale5 = 0.3; % change the size of the additional rectangle, originals' size is 1
xrect2 =  x1 + xrect*scale2; yrect2 = y1 + yrect*scale2;
xrect3 =  x2 + xrect*scale3; yrect3 = y2 + yrect*scale3;
xrect4 =  x3 + xrect*scale4; yrect4 = y3 + yrect*scale4;
xrect5 =  x4 + xrect*scale5; yrect5 = y4 + yrect*scale5;
plot(xrect,yrect,xrect2,yrect2,xrect3,yrect3,xrect4,yrect4,xrect5,yrect5),axis([-60 60 -60 60])