Raytracer

Raytracer for CSCI 4471 Computer Graphics class project

See Features section below for a complete feature list.

Author

• Glavin Wiechert

Downloads

Pre-Built Binary for Mac (188 KB)	zip of in/ directory (32.6 MB)	zip of out/ directory (4.22 MB)	zip of img/ directory (2.79 MB)

Note: Some of the required files are ignored by Git to keep the repository's size at a minimum. The complete in/ directory can be downloaded and swapped in place after downloading this repository. This will allow you to test all of the files, including those with large .obj and texture files.

The out/ directory contains all of the rendered images as .bmp. The img/ directory contains all of the images converted into .png. You may prefer to download the resulting images in out/ and img/, and skip compiling and running the Raytracer entirely.

Compiling

Build the executable in bin/ directory.

make

Cleaning

make clean

Usage

After compiling (see above):

./bin/raytracer.o

Testing

Unit Testing

make test

Rendering Sample Scenes

make render

Then look into the out/ for all of the rendered images.

You can also copy and paste the commands that are printed out for each file render.

For instance, you may see:

cd in/ ; ../bin/raytracer.o -input test_noise_1.txt -size 200 200 -bounces 4 -output ../out/test_noise_1-no_back.bmp -normals ../out/test_noise_1_normals.bmp ; cd ../

You can easily copy and paste this command to re-render this case for input test_noise_1.txt with those arguments.

Rendering Arguments

You can change the default arguments for render task.

• PATTERN - Defaults to *.txt - Globbing pattern to select input files from in/ directory
• SIZE - Defaults to 200 - Size of rendered images
• EXT - Defaults to bmp (bmp or tga supported) - File extension of rendered images
• BOUNCES - Defaults to 4 - # of recursive bounces of a ray, used for reflections
• SPECIALS - Defaults to on (on or off) - Render special cases of the input files, such as with depth mapping

Cleaning Rendered Images

After running make render and populating your out/ directory with images you may wish to clean / delete all of those images.

make clean-render

Rendering with a clean build

By default, make render will only compile any new / changed files. To force a make clean before building the binary and running the render task you can use the render-clean task.

# Exactly like using just `render` task
# Except it runs `clean` task before building
make render-clean

Examples

To render a single file, use full filename and force the pattern to only match one:

make render PATTERN=test_bunny_1k.txt

You can use Globbing / patterns to select input files:

make render PATTERN=test_colored_reflective_sphere_shadows_2*

You can also change the rendered image size:

# Render all images with output size of 1000
make render SIZE=1000
# Render specific pattern of images with output size of 1000
make render PATTERN=test_texture_mapping_sphere.txt SIZE=1000

You can also disable the special custom rendered images:

make render SPECIAL=off

Convert .bmp to .png images

First, install imagemagick:

brew install imagemagick

The following will convert the .bmp images to .png images and move them into the img/ directory.

make convert-render

You should run this after you're satisfied with your .bmp renders. It will render all of the .bmp images it can find in out/, and will take some time. Be patient and run only when you're ready.

make render # Render `.bmp` images to `out/`
make convert-render # Convert `.bmp` to `.png` and move to `img/`

Documentation

Source Code

Using Doxygen.

make docs

Features

Here is the complete feature list. Bolded list items are require features. Features marked with ✓ are implemented, while those without are not.

In addition to the 103 required marks there were 26 elective marks implemented, totalling to 129 marks out of the 125 marks for 100%.

Below is the complete list of features and details about each where applicable.

Electives (22 required marks)

Your choice of additional features beyond the specific required ones.

Implemented 26 elective marks:

• Multiple light sources (4 marks)
• Other debugging tools (2 marks)
• Environment Mapping (5 marks)
• Octree (6 marks)
• Antialiasing (5 marks)
• Source Control (4 marks)

Starting Out (5 required marks)

Implemented 5 out of 5 required marks.

• [✓] Basic classes, main function (5 marks)
  • [✓] Material
    • See Material.h and Material.cpp
  • [✓] Hit
    • See Hit.h
  • [✓] Ray
    • See Ray.h

Primitives and Modeling (29 required marks)

Implemented 29 out of 29 required marks.

• [✓] Object3D (4 marks)

  • See Object3D.h

• [✓] Sphere (6 marks)

  • See Sphere.h and Sphere.cpp

    

• [✓] Group (5 marks)

  • See Group.h

• [✓] Plane (2 marks)

  • See Plane.h

  

• [✓] Triangle (2 marks)

  • See Triangle.h

• [✓] .obj file importer (2 marks)
  • See Mesh.hpp and Mesh.cpp

• [✓] Transformations (8 marks)
  • See Transform.h

• [ ] Constructive Solid Geometry (10 marks)

• [ ] Additional Primitives (3 or more marks)

• [ ] 3-D Iterated Function System (8 marks)

Light Simulation and Illumination (36 required marks)

Implemented 36 out of 36 required marks and 4 elective marks.

• [✓] Diffuse shading (5 marks)
  • See Material.cpp

• [✓] Phong model (5 marks)
  • See Material.cpp

• [✓] Specular Reflection (10 marks)
  • See RayTracer.cpp

• [✓] Basic Shadows (6 marks)

  • See RayTracer.cpp

  

• [✓] Refraction (10 marks)

  • See RayTracer.cpp

    scene4_06_transparent_bars.txt	scene4_07_transparent_sphere_1.txt
    scene4_06_transparent_bars-shadows_shade_back.bmp	scene4_07_transparent_sphere_1-shadows_shade_back

    scene4_08_transparent_sphere_1.txt	scene4_09_transparent_sphere_2.txt
    scene4_08_transparent_sphere_1-shadows_shade_back.bmp	scene4_09_transparent_sphere_2-shadows_shade_back.bmp

• [ ] Soft Shadows (6 marks)

• [✓] Multiple light sources (4 marks)

  • See RayTracer.cpp

• [ ] Spotlights (4 marks)

• [ ] Glossy reflections (7 marks)

• [ ] Simple Fog (4 marks)

• [ ] Volumetric fog (8 marks)

• [ ] Photon Mapping (15 marks)

Camera and Lens Model (11 required marks)

Implemented 11 out of 11 required marks.

• [✓] Camera (2 marks)

  • See Camera.h

• [✓] Orthographic Camera (4 marks)

  • See OrthographicCamera.h

• [✓] Perspective Camera (5 marks)

  • See PerspectiveCamera.h

• [ ] Bloom (4 marks)

• [ ] Depth-of-field (8 marks)

• [ ] Fisheye appearance (2 marks)

• [ ] Oblique Cameras (2 marks)

• [ ] Other Non-Linear Cameras (4+ marks)

Debugging Tools (12 required marks)

Implemented 12 out of 12 required marks and 2 elective marks.

• [✓] Depth Visualization (4 marks)
  • See main.cpp

• [✓] Back face shading / no shading (4 marks)
  • See Material.cpp

• [✓] Normal Visualization (4 marks)
  • See main.cpp

• [ ] OpenGL Previsualization Tool (6 marks)

• [✓] Other Tools (2+ marks)

  • [✓] I developed RayCapture for the purpose of assisting me with quicker debugging and generating sample input scenes.
  • [✓] I have used Unit Testing to help me with my debugging. You can run make test to see the results. This has helped me in the initial development of this Raytracer for testing Camera's generateRay return values in comparison to the right values calculated "by hand". See test/unit/ directory for source code of the unit tests.
  • [✓] I developed a render.sh script that allows me to pass arguments in to customize which input files are rendered and how they are rendered, size of image, number of ray bounces, etc. See Rendering Arguments section above for more details.

Textures (10 required marks)

Implemented 10 out of 10 required marks and 5 elective marks.

• [✓] Simple Procedural (4 marks)

  • See Noise.h and Noise.cpp and PerlinNoise.h and PerlinNoise.cpp

    scene12_vase.txt	test_noise_1.txt
    scene12_vase-no_back.bmp	test_noise_1-shadows_shade_back.bmp

• [✓] Texture Mapping I (6 marks)

  • See texture.hpp and texture.cpp and Sphere.cpp

    test_texture_mapping_sphere.txt
    test_texture_mapping_sphere-shadows_shade_back.bmp

• [ ] Texture Mapping II (up to 6 marks)

• [✓] Environment Mapping (5 marks)

  This could be sphere maps or cube maps.

  • [✓] Cube Map support
  • See CubeMap.h and CubeMap.cpp

  `scene10_sphere.txt` | `scene12_vase.txt`

  --- | --- | scene10_sphere-shadows_shade_back.bmp | scene12_vase-shadows_shade_back.bmp

• [ ] Additional texture model loading (4 marks)

• [ ] Bump mapping (6 marks)

Acceleration Techniques (0 required marks)

Implemented 6 elective marks.

• [ ] Adaptive Ray Depth (5 marks)

• [ ] Intersection Methods (4 marks)

• [ ] BSP tree (6 marks)

• [ ] Grid (6 marks)

• [ ] Adaptive bounding boxes or bounding spheres (6 marks)

• [✓] Octree (6 marks)

  • [✓] Raytracer has Octree support for Meshes loaded by .obj files
    • See octree.hpp and octree.cpp and Mesh.cpp

• [ ] Some other technique of your choice (6 marks)

Distributed Raytracing (0 required marks)

Implemented 5 elective marks.

• [✓] Antialiasing (5)

  • [✓] Jittering method for antialiasing
    • See main.cpp

  Normal	Antialiasing with n=2	Antialiasing with n=4

• [ ] Adaptive Antialiasing (4 marks)

• [ ] Motion Blur (4 marks)

Software Engineering (0 required marks)

Implement 4 elective marks.

• [✓] Source Code Control (4 marks)

  • Using Git and GitHub!

• [ ] Parallelizing the Raytracer (5 marks)