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copied!<p>1) It depends on yoru implementation. You'll need to have a data structure where you can lookup the values at each corner (vertex) of the voxel or cube. This can be a 3d image (ie: an 3D texture in OpenGL), or it can be a customized array data structure, or any other format you wish.</p> <p>2) You need to check the vertices of the cube. There are different optimizations on this, but in general, start with the first corner, and just check the values of all 8 corners of the cube.</p> <p>3) Most (fast) algorithms create a bitmask to use as a lookup table into a static array of options. There are only so many possible options for this.</p> <p>4) Once you've made the triangles from the triTable, you can use OpenGL to render them.</p> <blockquote> <p>Let's say i have a point cloud data of an apple. how do i proceed?</p> </blockquote> <p>This isn't going to work with marching cubes. Marching cubes requires voxel data, so you'd need to use some algorithm to put the point cloud of data into a cubic volume. Gaussian Splatting is an option here.</p> <p>Normally, if you are working from a point cloud, and want to see the surface, you should look at surface reconstruction algorithms instead of marching cubes.</p> <p>If you want to learn more, I'd highly recommend reading some books on visualization techniques. A good one is from the Kitware folks - <a href="http://kitware.stores.yahoo.net/vistooltex.html" rel="nofollow noreferrer">The Visualization Toolkit</a>.</p> <p>You might want to take a look at <a href="http://www.vtk.org/" rel="nofollow noreferrer">VTK</a>. It has a C++ implementation of <a href="http://www.vtk.org/doc/nightly/html/classvtkMarchingCubes.html" rel="nofollow noreferrer">Marching Cubes</a>, and is fully open sourced.</p>

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