• Support for triangles, spheres & planes
• Support for different types of materials: diffuse, reflective, refractive & glossy
• Shadow casting
• Custom camera orientation
• Depth of field
• Anti-aliasing

• Support for emissive materials
• Ambient occlusion
• OBJ model support

• Material: Material "MaterialName" <MaterialType> (Color) <RefractiveIndex>
  • <MaterialType> represents the material type, and can be one of Diffuse, Reflective, Refractive or Glossy.
  • (Color) represents the color of the material as (r, g, b) where each value is a double between 0 and 1 corresponding to red, green and blue respectively.
  • <RefractiveIndex> is a double value between 0 and 1.
• Triangle: Triangle "TriangleName" (v0) (v1) (v2) "MaterialName"
  • Vertices are represented by (v0), (v1) and (v2) each as coordinates (x, y, z). The front face is defined by clockwise winding order.
  • "MaterialName" indicates the material that should be used.
• Sphere: Sphere "SphereName" (center) <radius> "MaterialName"
  • (center) represents the center of the sphere as coordinates (x, y, z)
  • <radius> is a double representing the radius of the sphere
  • "MaterialName" indicates the material that should be used.
• Plane: Plane "PlaneName" (center) (normal) "MaterialName"
  • (center) represents the center of the sphere as coordinates (x, y, z)
  • (normal) represents the direction of the normal vector of the plane as coordinates (x, y, z)
  • "MaterialName" indicates the material that should be used.
• Point light: PointLight "LightName" (position) (Color)
  • (position) represents the position of the point light as coordinates (x, y, z)
  • (Color) represents the color of the material as (r, g, b) where each value is a double between 0 and 1 corresponding to red, green and blue respectively.

Ensure that .NET SDK version 6.0 or higher is installed, and then run the following command:

dotnet run -- -f tests/sample_scene_1.txt -o images/ouput.png

• -f: Input text file path
• -o: Output image file path
• -w: Image width (default 400px)
• -h: Input height (default 400px)
• -x: Anti-aliasing multiplier (default 1)
• -p: Camera position coordinates (default (0.0, 0.0, 0.0))
• -a: Camera rotation axis vector (default (0.0, 0.0, 1.0))
• -n: Camera rotation angle (default 0 degrees)
• -r: Aperture radius of camera (default 0.0)
• -t: Focal length of camera (default 1.0)

-f and -o are mandatory, the rest are optional.

• https://www.scratchapixel.com/lessons/3d-basic-rendering/ray-tracing-rendering-a-triangle
• https://www.scratchapixel.com/lessons/3d-basic-rendering/minimal-ray-tracer-rendering-simple-shapes/ray-sphere-intersection
• https://www.scratchapixel.com/lessons/3d-basic-rendering/minimal-ray-tracer-rendering-simple-shapes/ray-plane-and-ray-disk-intersection
• https://www.scratchapixel.com/lessons/3d-basic-rendering/introduction-to-shading/reflection-refraction-fresnel
• https://handwiki.org/wiki/Rodrigues%27_rotation_formula
• https://medium.com/@elope139/depth-of-field-in-path-tracing-e61180417027
• https://www.scratchapixel.com/lessons/3d-basic-rendering/phong-shader-BRDF/phong-illumination-models-brdf