pixel3D

Extension of pixel for rendering 3D obj files. (Pure C++, no libraries, and appropriate use of the STL)

Usage

1. Triangulate the mesh. This program can only handle triangles.
2. Run the program
3. Enter the address of your obj file or drag it onto the text area.
4. Press S with an axis key (X,Y,Z) for scaling. Hold LShift to reverse the scale transform.
5. Press R with an axis key for rotation.
6. Use O and P together to toggle orthographic / perspective mode (Disclaimer: Rendering a rotated mesh is broken in perspective mode)
7. Scroll to transform mesh along Z (depth) axis. (Effect is obviously apparent only in perspective view)
8. Use K, L to change the field of view in perspective view

Building

chmod a+x give_me_exec.sh
mkdir build
cd build
cmake ..
cmake --build .

Incremental builds

./give_me_exec.sh

Primitive cube render

(Each face is rendered as two triangles. Adjacent faces have shared double edges.)

Update

Final Result

High poly objects don't render properly because of the glitchy drawLine function in include/A1/application3D.h. Time complexity is nlogn, for n as the number of polygons. Triangles, actually, cause this program only works with triangles, and not with quads or anything else. This can be improved to linear time by adding a depth byte to each pixel instead of sorting the entire mesh before each frame.

Update: Random lines in render has now been fixed with a new algorithm for drawing lines.

A quick cleansing ritual