3d-rendering

I am new to Three.js and looking for a tutorial to get me started on how to use Marching Cubes in three.js. Some of the projects I have seen so far in three.js which use this are a bit complicated for me, so a simple tutorial would be nice. Thank you. I looked at three.js and their marching cubes demo. It seems to have been built specifically for rendering meatballs :-) I started fresh and copied over the lookup tables and rewrote the main functions and linear interprolation methods and got a new working engine working. My advice would be to do a rewrite yourself (it took me some time), but it

So I am using XTK to develop a app that will allow users to view multiple 3D meshes in one renderer. The problem is that it uses a perspective camera instead of a orthographic, which causes panning to 'rotate' the meshes a bit. Has anyone been successful in getting XTK to render orthographically without modifying source code? I would rather not modify it but if I have to I will. Thank you! So from what I can see, there's no way to set a 3D camera to be in orthographic perspective without modifying the source code. However, it seems fairly straight forward to add that functionality. If you add

I'm starting to learn about 3D rendering and I've been making good progress. I've picked up a lot regarding matrices and the general operations that can be performed on them. One thing I'm still not quite following is OpenGL's use of matrices. I see this (and things like it) quite a lot: x y z n ------- 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 So my best understanding, is that it is a normalized (no magnitude) 4 dimensional, column-major matrix. Also that this matrix in particular is called the "identity matrix". Some questions: What is the "nth" dimension? How and when are these applied? My biggest