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What is the easiest way to draw polygon given only vertices coordinates ?

조회 수: 67(최근 30일)
hazem saaad
hazem saaad 2018년 6월 5일
답변: Steven Lord 2018년 6월 5일
What is the easiest way to plot polygon given only vertices coordinates?

답변(2개)

Star Strider
Star Strider 2018년 6월 5일
One approach:
vertices = randi(9, 10, 2); % Create Vertices Matrix [x(:) y(:)]
verticesc = vertices - mean(vertices,1); % Center Vertices
[~,sortidx] = sortrows(atan2(verticesc(:,2), verticesc(:,1)),1); % Sort
sortidx = [sortidx; sortidx(1)]; % Close Polygon
figure(1)
plot(vertices(sortidx,1), vertices(sortidx,2), '-pr')
axis equal
The ‘vertices’ matrix has the x coordinate in the first column, and the y coordinate in the second column.

Steven Lord
Steven Lord 2018년 6월 5일
I see that this has the tag "3d plots" but you refer to "polygon". If in fact you're referring to the standard definition of polygon as "a plane figure that is bounded by a finite chain of straight line segments closing in a loop" use your coordinates to build a polyshape object and call plot on that polyshape.
If instead you want a "3d plot", also known as a polyhedron, that's different.

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