Direction of a cone and 3D point is inside or not on cone!!!!

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Nuno 2015-6-5

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https://ww2.mathworks.cn/matlabcentral/answers/222696-direction-of-a-cone-and-3d-point-is-inside-or-not-on-cone

关闭： Walter Roberson 2015-6-5

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Hello! I have the follow cone code:

r = 112.0; % radius
h = 100.0; % heigth
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); % begin in the specific point
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