rendering

package
v0.10.0 Latest Latest
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 Go to latest Published: Feb 21, 2024 License: MIT Imports: 14 Imported by: 0

README

Rendering

Package for rendering meshes generated from polyform.

Straight up a 1:1 implementation based on the guide "Ray Tracing in One Weekend" by Peter Shirley

Benchmarking

The demo scene from "Ray Tracing in One Weekend" has been put into a golang benchmark. If you try implementing optimizations, you can use this to test out what's going on.

go test rendering/render_test.go -run BenchmarkBunnyRender -bench=BenchmarkBunnyRender -cpuprofile cpu.prof
go tool pprof -svg cpu.prof > cpu.svg

Making a Video

Some examples output frames to a video that then need to get stitched together. For that I use ffmpeg:

ffmpeg -framerate 24 -pattern_type glob -i '*.png' -c:v libx264 -pix_fmt yuv420p -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" out.mp4

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func RenderToFile added in v0.4.0 

func RenderToFile(
	maxRayBounce, samplesPerPixel, imageWidth int,
	hittables []Hittable,
	camera Camera,
	imgPath string,
	completion chan<- float64,
) error

Types

type BVHNode 

type BVHNode struct {
	// contains filtered or unexported fields
}

func NewBVHFromMesh 

func NewBVHFromMesh(mesh modeling.Mesh, mat Material) *BVHNode

func NewBVHTree 

func NewBVHTree(objects []Hittable, start, end int, startTime, endTime float64) *BVHNode

func (BVHNode) BoundingBox 

func (bvhn BVHNode) BoundingBox(startTime, endTime float64) *geometry.AABB

func (BVHNode) Hit 

func (bvhn BVHNode) Hit(r *TemporalRay, min, max float64, hitRecord *HitRecord) bool

type Camera 

type Camera struct {
	// contains filtered or unexported fields
}

func NewCamera 

func NewCamera(
	vfov, aspectRatio, aperture, focusDist float64,
	origin, lookAt, up vector3.Float64,
	timeStart, timeEnd float64,
	background sample.Vec3ToVec3,
) Camera

func NewDefaultCamera added in v0.4.0 

func NewDefaultCamera(
	aspectRatio float64,
	origin, lookAt vector3.Float64,
	time, shutter float64,
) Camera

func (Camera) GetRay 

func (c Camera) GetRay(r *rand.Rand, s, t float64) TemporalRay

type HitList 

type HitList []Hittable

func (HitList) BoundingBox 

func (h HitList) BoundingBox(startTime, endTime float64) *geometry.AABB

func (HitList) Hit 

func (h HitList) Hit(r *TemporalRay, min, max float64, hitRecord *HitRecord) bool

type HitRecord 

type HitRecord struct {
	Distance   float64
	Point      vector3.Float64
	Normal     vector3.Float64
	FrontFace  bool
	Material   Material
	UV         vector2.Float64
	Float3Data map[string]vector3.Float64
	Float2Data map[string]vector2.Float64
}

func NewHitRecord 

func NewHitRecord() *HitRecord

func (*HitRecord) SetFaceNormal 

func (h *HitRecord) SetFaceNormal(ray TemporalRay, outwardNormal vector3.Float64)

type Hittable 

type Hittable interface {
	Hit(r *TemporalRay, min, max float64, hitRecord *HitRecord) bool
	BoundingBox(startTime, endTime float64) *geometry.AABB
}

type Material 

type Material interface {
	Scatter(in geometry.Ray, rec *HitRecord, attenuation *vector3.Float64, scattered *geometry.Ray) bool
	Emitted(uv vector2.Float64, pont vector3.Float64) vector3.Float64
}

type Mesh 

type Mesh struct {
	// contains filtered or unexported fields
}

func NewMesh 

func NewMesh(mesh modeling.Mesh, mat Material) Mesh

func NewMeshWithAttributes added in v0.4.0 

func NewMeshWithAttributes(mesh modeling.Mesh, mat Material, v3Data, v2Data []string) Mesh

func (Mesh) BoundingBox 

func (m Mesh) BoundingBox(startTime, endTime float64) *geometry.AABB

func (Mesh) GetMaterial 

func (s Mesh) GetMaterial() Material

func (Mesh) Hit 

func (s Mesh) Hit(ray *TemporalRay, minDistance, maxDistance float64, hitRecord *HitRecord) bool

func (Mesh) Hit2 added in v0.4.0 

func (s Mesh) Hit2(ray *TemporalRay, minDistance, maxDistance float64, hitRecord *HitRecord) bool

type SortBoxByXAxis 

type SortBoxByXAxis []Hittable

func (SortBoxByXAxis) Len 

func (a SortBoxByXAxis) Len() int

func (SortBoxByXAxis) Less 

func (a SortBoxByXAxis) Less(i, j int) bool

func (SortBoxByXAxis) Swap 

func (a SortBoxByXAxis) Swap(i, j int)

type SortBoxByYAxis 

type SortBoxByYAxis []Hittable

func (SortBoxByYAxis) Len 

func (a SortBoxByYAxis) Len() int

func (SortBoxByYAxis) Less 

func (a SortBoxByYAxis) Less(i, j int) bool

func (SortBoxByYAxis) Swap 

func (a SortBoxByYAxis) Swap(i, j int)

type SortBoxByZAxis 

type SortBoxByZAxis []Hittable

func (SortBoxByZAxis) Len 

func (a SortBoxByZAxis) Len() int

func (SortBoxByZAxis) Less 

func (a SortBoxByZAxis) Less(i, j int) bool

func (SortBoxByZAxis) Swap 

func (a SortBoxByZAxis) Swap(i, j int)

type Sphere 

type Sphere struct {
	// contains filtered or unexported fields
}

func NewAnimatedSphere 

func NewAnimatedSphere(radius float64, mat Material, animation sample.FloatToVec3) *Sphere

func NewSphere 

func NewSphere(center vector3.Float64, radius float64, mat Material) *Sphere

func (Sphere) BoundingBox 

func (s Sphere) BoundingBox(startTime, endTime float64) *geometry.AABB

func (Sphere) GetMaterial 

func (s Sphere) GetMaterial() Material

func (Sphere) Hit 

func (s Sphere) Hit(ray *TemporalRay, minDistance, maxDistance float64, hitRecord *HitRecord) bool

func (Sphere) UV 

func (s Sphere) UV(p vector3.Float64) vector2.Float64

type TemporalRay 

type TemporalRay struct {
	// contains filtered or unexported fields
}

func NewTemporalRay 

func NewTemporalRay(origin vector3.Float64, direction vector3.Float64, time float64) TemporalRay

func (TemporalRay) At 

func (r TemporalRay) At(t float64) vector3.Float64

func (TemporalRay) Direction 

func (r TemporalRay) Direction() vector3.Float64

func (TemporalRay) Origin 

func (r TemporalRay) Origin() vector3.Float64

func (TemporalRay) Ray 

func (r TemporalRay) Ray() geometry.Ray

type Texture 

type Texture interface {
	Value(uv vector2.Float64, p vector3.Float64) vector3.Float64
}

type Tree 

type Tree struct {
	// contains filtered or unexported fields
}

func NewBVH 

func NewBVH(items []Hittable, startTime, endTime float64) Tree

func (Tree) BoundingBox 

func (bvh Tree) BoundingBox(startTime, endTime float64) *geometry.AABB

func (Tree) Hit 

func (bvh Tree) Hit(r *TemporalRay, min, max float64, hitRecord *HitRecord) bool

type Triangle 

type Triangle struct {
	// contains filtered or unexported fields
}

func (Triangle) BoundingBox 

func (tri Triangle) BoundingBox(start, stop float64) *geometry.AABB

func (Triangle) Hit 

func (tri Triangle) Hit(ray *TemporalRay, minDistance, maxDistance float64, hitRecord *HitRecord) bool

type XYRectangle 

type XYRectangle struct {
	// contains filtered or unexported fields
}

func NewXYRectangle 

func NewXYRectangle(bottomLeft, topRight vector2.Float64, depth float64, mat Material) XYRectangle

func (XYRectangle) BoundingBox 

func (xyr XYRectangle) BoundingBox(startTime, endTime float64) *geometry.AABB

func (XYRectangle) Hit 

func (xyr XYRectangle) Hit(ray *TemporalRay, minDistance, maxDistance float64, hitRecord *HitRecord) bool

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