### How to find ther number of edges in a OBJ file??

I have an obj file and I want to retrieve information about this file, I can get the number of triangles and Vertice...

### Ray-box Intersection Theory?

I wish to determine the intersection point between a ray and a box. The box is defined by its min 3D coordinate and ...

### 3D point from two angles and a distance?

I want to be able to calculate the coordinates of a 3D point, based on its distance from the origin, and two angles:...

### 3D Vector defined by 2 angles?

So basicly I'm looking for a way to calculate the x,y and z component of a vector using 2 angles as shown: Where al...

### What is the simplest way to render a 3D cube with a single lighting source??

Depicted below is a crappy Photoshop mockup of a three-dimensional cube. Here are my parameters: The solution mus...

### Exploded view algorithm for CAD?

I'm making a program to view 3D CAD models and would like to build in automated exploded views. All the assemblies t...

### Camera pixels to planar world points given 4 known points?

My problem I am assuming is easy, but I still haven't been able to solve it due to my experience in linear algebra a...

### ggplot2 3D Bar Plot?

I Know this sounds basic, but have a been searching for literally more than an hour now without success. I'm simply ...

### 4d surface graph logistic regression (x,y,z, color)?

I'm trying to plot a 4d surface graph of a binomial relationship involving 4 quantitative variables (3 predictor var...

### What is the normal of a face??

I was told the normal of a face was 'A vector perpendicular to the face' but I still don't get it when trying to dra...

### Signed angle between two 3D vectors with same origin within the same plane?

What I need is a signed angle of rotation between two vectors Va and Vb lying within the same 3D plane and having th...

### How can I convert 3D space coordinates to 2D space coordinates??

I'm using a Lua API. I'm trying to transform 3D space coordinates to 2D space coordinates. I've asked google but I c...