graytracer

Raytracer written in Go, based on the book The Ray Tracer Challenge by Jamis Buck.

Current progress

• ✅ Chapter 1: Tuples, points and vectors
• ✅ Chapter 2: Drawing on a canvas
• ✅ Chapter 3: Matrices
• ✅ Chapter 4: Matrix transformations
• ✅ Chapter 5: Ray-Sphere intersections
• ✅ Chapter 6: Light and Shading
• ✅ Chapter 7: Making a Scene
• ✅ Chapter 8: Shadows
• ✅ Chapter 9: Planes
• ✅ Chapter 10: Patterns
• ✅ Chapter 11: Reflection and Refraction
• ✅ Chapter 12: Cubes
• ✅ Chapter 13: Cylinders and Cones
• ✅ Chapter 14: Groups
• ✅ Chapter 14.5: Bounding Boxes
• ✅ Chapter 15: Triangles
• ✅ Chapter 15.5: OBJ files
  • Teapot Low
  • Teapot
  • Teapot Low Smooth
  • Teapot Smooth
  • Model 3
    • Model 3 OBJ source
    • 737,161 Triangles
• ✅ Chapter 16: Constructive Solid Geometry

Latest Render

Benchmark stats

Benchmarks of primitives calculation

pkg: github.com/factorion/graytracer/pkg/primitives cpu: AMD Ryzen 7 5800H with Radeon Graphics

Function	Iterations	Speed	Memory	Allocations
BenchmarkSubmatrix4x4-16	10416955	114.4 ns/op	152 B/op	4 allocs/op
BenchmarkMatrixMultiply-16	6347768	189.2 ns/op	224 B/op	5 allocs/op
BenchmarkMatrixDeterminant4x4-16	799813	1514 ns/op	1568 B/op	52 allocs/op
BenchmarkMatrixMinor3x3-16	14114458	83.44 ns/op	80 B/op	3 allocs/op
BenchmarkMatrixCofactor3x3-16	14621076	81.79 ns/op	80 B/op	3 allocs/op
BenchmarkMatrixInverse4x4-16	151344	7859 ns/op	8064 B/op	265 allocs/op
BenchmarkPVTransform-16	255785548	4.582 ns/op	0 B/op	0 allocs/op
BenchmarkPVReflect-16	707641048	1.715 ns/op	0 B/op	0 allocs/op
BenchmarkRayTransform-16	88858610	13.39 ns/op	0 B/op	0 allocs/op

Benchmarks of basic shape calculations

pkg: github.com/factorion/graytracer/pkg/shapes cpu: AMD Ryzen 7 5800H with Radeon Graphics

Function	Iterations	Speed	Memory	Allocations
BenchmarkConeIntersection-16	9989410	121.4 ns/op	128 B/op	2 allocs/op
BenchmarkConeNormal-16	7841389	155.3 ns/op	224 B/op	5 allocs/op
BenchmarkCubeIntersection-16	15381164	70.61 ns/op	80 B/op	1 allocs/op
BenchmarkCubeNormal-16	7521614	156.3 ns/op	224 B/op	5 allocs/op
BenchmarkCylinderIntersection-16	9446713	124.3 ns/op	128 B/op	2 allocs/op
BenchmarkCylinderNormal-16	7790467	151.1 ns/op	224 B/op	5 allocs/op
BenchmarkPlaneIntersection-16	19712168	60.18 ns/op	48 B/op	1 allocs/op
BenchmarkPlaneNormal-16	8302458	148.8 ns/op	224 B/op	5 allocs/op
BenchmarkSphereIntersection-16	9833896	120.2 ns/op	128 B/op	2 allocs/op
BenchmarkSphereNormal-16	7740237	150.4 ns/op	224 B/op	5 allocs/op
BenchmarkTriangleIntersection-16	16434596	71.02 ns/op	48 B/op	1 allocs/op
BenchmarkTriangleNormal-16	8217364	143.5 ns/op	224 B/op	5 allocs/op

Benchmarks of different bounding box setups with 4096 spheres

pkg: github.com/factorion/graytracer/pkg/components cpu: AMD Ryzen 7 5800H with Radeon Graphics

Function	Iterations	Speed	Memory	Allocations
BenchmarkNoBoundingBoxes-16	4136	291257 ns/op	7936 B/op	113 allocs/op
Benchmark8BoundingBoxes-16	18379	64370 ns/op	10080 B/op	124 allocs/op
Benchmark64BoundingBoxes-16	60115	20114 ns/op	10240 B/op	129 allocs/op