Plotting a 3d cone

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Animesh Srivastava
Animesh Srivastava on 20 Apr 2021
Edited: Matt J on 20 Apr 2021
Hi,
I am trying to plot a 3d cone. I have the following details about it.
  1. The coordinates of the vertex.
  2. the height of the cone and the axis of the cone (the axis is not predefined as x,y,z axis. i have a separate line along which i have to plot the cone).
  3. The angle at the vertex from the axis. (that is the value of theta and not 2 times theta.
i am trying a lot, but unable to do so. the general cone generators like 'cylinder([0 1])' are not usable for me.
Can anyone give any suggestions ot tips regarding the same?

Accepted Answer

Matt J
Matt J on 20 Apr 2021
Edited: Matt J on 20 Apr 2021
the general cone generators like 'cylinder([0 1])' are not usable for me.
I think they are. You just have to reposition the cone with an hgtransform.
[X,Y,Z]=cylinder([0 1],1000);
axis([-3 +3,-3 +3,-3 +3])
M=makehgtform('translate',[-1,-1,-1],'xrotate',pi/4,'yrotate',pi/4);
h=surf(X,Y,Z,'Parent',hgtransform('Matrix',M),'LineStyle','none','FaceAlpha',0.3);
view([-75,35])
axis vis3d
grid on

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