How i change cone direction and how i verify if a 3D point is inside of cone?

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Nuno 2015-6-5

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https://ww2.mathworks.cn/matlabcentral/answers/222561-how-i-change-cone-direction-and-how-i-verify-if-a-3d-point-is-inside-of-cone

编辑： yogesh jain 2016-2-20

Hello! I have the follow cone code:

r = 112.0;
h = 100.0;
m = (h/r);
[R,A] = meshgrid(linspace(0,r,11),linspace(0,2*pi,41));
X = (R .* cos(A));
Y = (R .* sin(A));
Z = (m*R);
h=surf(X+185,Y+200,Z+210);
axis square

First of all, i don´t know if the cone was built correctly. I need create a cone with tip point in (x=185,y=200,z=210) but with a specific direction ( i need test to check what is the perfect), but i don't know how i change de direction (the normalized axis vector, pointing from the tip to the base).

Other thing is, how i check if a 3D point (with x,y and z coordinate) is inside or outside of cone?

Thanks for your attention

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Answer 1

yogesh jain 2016-2-20

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编辑：yogesh jain 2016-2-20

Hello , use 'rotate' function after 'surf', the created shape will be rotated according to plane , direction n specific points . follow this link - http://in.mathworks.com/help/matlab/ref/rotate.html

good luck