Easy way to set camera viewing axis normal to a plane
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Is there an easy way to set the camera viewing axis normal to one of the planes in a 3D plot. That is set the camera to only look at the xy plane or xz plane, etc. Trying to position the camera manually does not work well and is very frustrating.
I created a bunch of .fig files of some data points in 3D space and now I am trying to visualize them from different angles, namely looking down(xy plane) and across(xz-yz planes).
Thanks for the help.
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답변 (3개)
Matt Fig
2011년 7월 2일
Run this to see. Look at the view of the plot that pops up, then press return to see the next view. Do this twice.
plot3(0,0,0)
axis([-1 1 -1 1 -1 1])
xlabel('X')
ylabel('Y')
zlabel('Z')
view(0,90) % XY
pause
view(0,0) % XZ
pause
view(90,0) % YZ
댓글 수: 2
Massimo Ciacci
2016년 5월 2일
편집: Massimo Ciacci
2016년 5월 2일
I guess the following function should do, it is based on the fact that the conversion [x,y,z] to [az,el] to [x,y,z] is
x=sin(az)*cos(el)
y=cos(az)*cos(el)
z=sin(el)
and therefore
az = 180/pi*asin(x/sqrt(x^2+y^2));
el = 180/pi*asin(z);
---------------
function [az,el]=normalToAzimuthElevationDEG(x,y,z, applyView)
if nargin < 3
applyView = 0;
end
if length(x)>1
v = x;
if nargin > 1
applyView = y;
end
x=v(1);
y=v(2);
z=v(3);
end
if x==0 && y==0
x =eps;
end
vNorm = sqrt(x^2+y^2+z^2);
x=x/vNorm;
y=y/vNorm;
z=z/vNorm;
az = 180/pi*asin(x/sqrt(x^2+y^2));
el = 180/pi*asin(z);
if applyView
thereIsAnOpenFig = ~isempty(findall(0,'Type','Figure'));
if thereIsAnOpenFig
axis equal
view([az,el]);
%the normal to the plane should now appear as a point
plot3([0,x],[0,y],[0,z],'linewidth',3)
end
end
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