How send to back patch objects in a graph?

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Modestas Sekreckis
Modestas Sekreckis 2011년 5월 27일
댓글: ondrej 2015년 6월 8일
Hi, I draw a graphic http://img196.imageshack.us/img196/3923/matlaboklausimas3.png I use is this code:
a1=[1 150];
a2=[1 180];
a3=[1 200];
z1=[1 150];
xk=[50 100];
zk=[20 150];
kx = [xk(1,1) xk(1,2) xk(1,2) xk(1,1);];
kz = [zk(1,1) zk(1,1) zk(1,2) zk(1,2);];
figure(20) plot(a1,z1,a2,z1,a3,z1)
set(gca,'XDir','reverse')
xlabel('X'); ylabel('Z');
axis([0 MAX_X+1 0 MAX_Y+1])
patch(kx(1,:),kz(1,:),'y')
How I can sent to back patch objects. I need to show all the lines

채택된 답변

Matt Fig
Matt Fig 2011년 5월 27일
Simply change the order of objects in the children property of the axes object.
set(gca,'children',flipud(get(gca,'children')))

추가 답변 (2개)

Walter Roberson
Walter Roberson 2011년 5월 27일
Please see my Comment about opengl in this Answer

Patrick Kalita
Patrick Kalita 2011년 5월 27일
If this is going to be a strictly 2D scene (that is, you aren't planning on adding any 3D elements like a surface), then the best way to ensure the patch object is drawn behind the lines is to (1) set the axes DrawMode property to 'fast' and (2) draw the patch before the lines. Setting the DrawMode property to 'fast' ensures that the objects are drawn in the same order that they are added to the axes.
Here's a snippet based on your example:
a1=[1 150];
a2=[1 180];
a3=[1 200];
z1=[1 150];
xk=[50 100];
zk=[20 150];
kx = [xk(1,1) xk(1,2) xk(1,2) xk(1,1);];
kz = [zk(1,1) zk(1,1) zk(1,2) zk(1,2);];
figure(20);
a = axes('DrawMode', 'fast');
patch(kx(1,:),kz(1,:),'y');
hold on;
plot(a1,z1,a2,z1,a3,z1)
set(a,'XDir','reverse')
  댓글 수: 1
Walter Roberson
Walter Roberson 2011년 5월 27일
Drawmode is defined for the painters renderer but not for other renders.
The documentation describing the OpenGL renderer indicates, "OpenGL and Zbuffer renderers display objects sorted in front to back order, as seen on the monitor, and lines always draw in front of faces when at the same location on the plane of the monitor. Painters sorts by child order (order specified)."

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