How to utilize voxels to measure the volume of a cone using Matlab?

Hi Dear Community members,

i want to measure the volume of a cone using voxel. i am new in this field of voxels. Using the first link, a sphre of radius 8 has been voxelized. After voxelization, how can we count the total number of voxels. how to fix the size of voxels?

Using this method of author, how can we voxelize the cone to measure its volume.

Thanks in advance for all cooperation and guidance.

https://www.mathworks.com/matlabcentral/fileexchange/50802-voxelplotter

https://www.mathworks.com/matlabcentral/answers/55633-how-to-drawing-3d-voxel-data?s_tid=answers_rc1-2_p2_MLT

% This scrypt illustrates the use of VoxelPlotter function to visualize
% voxel data stored in a 3d matrix
clear all
close all
clc
%Generating sinthetic input
gridesize=16;
R=8;
VoxelMat=zeros(gridesize,gridesize,gridesize);
for i=1:gridesize
    for j=1:gridesize
        for k=1:gridesize
            if (i-gridesize/2)^2+(j-gridesize/2)^2+(k-gridesize/2)^2<R^2
                VoxelMat(i,j,k)=1;
            end
        end
    end
end
[vol_handle]=VoxelPlotter(VoxelMat,1); 

view(3);
daspect([1,1,1]);
set(gca,'xlim',[0 gridesize], 'ylim',[0 gridesize], 'zlim',[0 gridesize]);