# All Questions

**510**

votes

**16**answers

725543 views

### "Cross origin requests are only supported for HTTP." error when loading a local file

I'm trying to load a 3D model into Three.js with JSONLoader, and that 3D model is in the same directory as the entire website.
I'm getting the "Cross origin requests are only supported for HTTP." err...

**12**

votes

**1**answers

2797 views

### How do I compose a rotation matrix with human readable angles from scratch?

The one thing that has always hindered me from doing 3D programming is failing to understand how math works. I can go along with math fine in programming flow using methods and functions, then its all...

**3**

votes

**2**answers

1053 views

### Mathematically compute a simple graphics pipeline

I am trying to do / understand all the basic mathematical computations needed in the graphics pipeline to render a simple 2D image from a 3D scene description like VRML. Is there a good example of the...

**3**

votes

**2**answers

1938 views

### OpenGL - Index buffers difficulties

I have a custom file format that has all the needed information for a 3D mesh (exported from 3ds Max). I've extracted the data for vertices, vertex indices and normals.
I pass to OpenGL the vertex da...

**10**

votes

**3**answers

22491 views

### Three.js - Orthographic camera

I've working on an app wich displays some 3D models. We load the models, create the meshes, add them to the scene...standard procedure. After the last mesh is added, we compute the bounding box in ord...

**9**

votes

**2**answers

4441 views

### OpenGL ES2 Alpha test problems

I am rendering in 3D multiple objects with textures that have alpha. All the textures load fine but when I try to render them in front of each other I get the following:
Left is what I have. Right ...

**3**

votes

**1**answers

1032 views

### Turning a cylinder into a sphere without pinching at the poles

I'm working on generating a planet made out of a hexagon grid. The poles aren't needed - making this a bit easier. Is there a better way to turn the cylinder into a sphere that would have uniform hexa...

**50**

votes

**2**answers

54168 views

### Python/matplotlib : plotting a 3d cube, a sphere and a vector?

I search how to plot something with less instruction as possible with matplotlib but I don't find any help for this in the documentation.
I want to plot the following things:
a wireframe cube cente...

**20**

votes

**3**answers

17108 views

### Converting 3D position to 2d screen position [r69!]

I need Three.js code to convert 3D object coordinates to 2d ones in a 'div' element so that I can place text labels where they need to be (without those labels scaling/moving/rotating along with the 3...

**5**

votes

**1**answers

1076 views

### Plotting volumetric data in MATLAB

I am working in Matlab and I have a 3d matrix with dimensions 384x512x160, which is made of 384x512 slices.
How can I plot data like that?