How to shift and re plot 4 rectangles ?

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Luis Garcia
Luis Garcia 2018-7-2
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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采纳的回答

Aquatris
Aquatris 2018-7-2
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])

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