Skip to content

Latest commit

 

History

History
87 lines (77 loc) · 2.99 KB

README.md

File metadata and controls

87 lines (77 loc) · 2.99 KB
Raw

Software Graphics Engine

By: Greg Zborovsky

Greg Zborovsky Pd. 4

Implemented Features For Final Project:

  • Proper OBJ/MTL loading
  • Proper Texture Loading
  • Bilinear Filtering
  • Orthographic Camera
  • Normal Mapping
  • Gamma Correction
  • Anti-Aliasing

More Details:

  • Proper OBJ/MTL loading
    • Supports triangles & quadrilaterals, UV texture coordinates, vertex normals, multiple objects, and different texture types
  • Proper Texture Loading
    • Off by one errors have been eliminated, some code refactoring
  • Bilinear Filtering
    • When reading from a texture, interpolate between the closest four colors to get an approximate "in-between" color
  • Orthographic Camera & LookAt mode
    • Previously only had a Perspective Camera, an Orthographic Camera mirrors what we have done in class
    • LookAt mode allows me to choose a position to point my camera at rather than explicitly use Euler angles
  • Normal Mapping
    • Based on a texture, offset the direction of the normals of a surface, allows for highly detailed but low-poly surfaces
  • Gamma Correction
    • Raise input colors to power of 2.2 (gamma), and output to 1/2.2 - Accounts for how humans perceive light
  • Anti-Aliasing
    • Done using a basic super sampling by rendering to 2w x 2h dimensions and scaling down to w x h using bilinear filtering
  • MDL & Animation were not included, but had animation been included, I would have opted for a keyframe-based system
  • Other existing features include: Offscreen clipping, Per-object transforms, Perspective-Correct Interpolation

Default Example:

To run the default example (Warning: Uses around 2GB of memory): Extract the resources folder from the zip in the link below:

https://drive.google.com/file/d/1hIbpT2HYk75rIr8vw1dUWTZyL2GzMVXF/view?usp=sharing

And drop the resources folder into the root folder of this project

.
├── convertObjImgToPPM.py
├── makefile
├── README.md
├── resources
│   ├── skybox.mtl
│   ├── skybox.obj
│   ├── StandardCubeMap.ppm
│   ├── tcmodimt_2K_Albedo.ppm
│   ├── ...
└── src
    ├── Camera.cpp
    ├── Camera.hpp
    ├── ...

Note - convertObjImgToPPM.py is primarily intended for developer use and requires using Python3 and having Pillow installed. Paths to images should also be absolute paths.

Features:

  • Render to ppm/ImageMagick/png
  • Basic 3d command input
  • Bresenham line drawing
  • Matrix transformations in 3d
  • Circle, hermite, and bezier curve drawing
  • Box, sphere, and torus primitives
  • Scanline triangle fill
  • Object-space transformations
  • Perspective/Orthographic Euler and LookAt Camera
  • Texture Mapping
  • Tangent Space Normal Mapping
  • Sky maps
  • Blinn-Phong Lighting, Phong Shading
  • Gamma Correction
  • OBJ/MTL Support
  • 2x Supersampling

Todo:

  • Better animation support
  • Quaternions
  • Ray tracing
  • Shadow Mapping

Resources: