raytracer

package
v0.0.0-...-e6f9244 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Jul 6, 2021 License: MIT Imports: 8 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func Clamp 

func Clamp(x float64, min float64, max float64) float64

func DegreesToRadians 

func DegreesToRadians(degrees float64) float64

func DielectricScatter 

func DielectricScatter(rIn Ray, rec *HitRecord, attenuation *Vector, scattered *Ray, mat Material) bool

func IsotropicScatter 

func IsotropicScatter(rIn Ray, rec *HitRecord, attenuation *Vector, scattered *Ray, mat Material) bool

func LambertianScatter 

func LambertianScatter(rIn Ray, rec *HitRecord, attenuation *Vector, scattered *Ray, mat Material) bool

func LightScatter 

func LightScatter(rIn Ray, rec *HitRecord, attenuation *Vector, scattered *Ray, mat Material) bool

func MetalScatter 

func MetalScatter(rIn Ray, rec *HitRecord, attenuation *Vector, scattered *Ray, mat Material) bool

func Min 

func Min(a float64, b float64) float64

func RandomFloat64 

func RandomFloat64() float64

func RandomFloat64Range 

func RandomFloat64Range(min float64, max float64) float64

func Reflectance 

func Reflectance(cosine float64, refIdx float64) float64

func SeedRandom 

func SeedRandom()

func WriteColourPPM 

func WriteColourPPM(pixel Vector, samplesPerPixel int)

func WritePPMHeader 

func WritePPMHeader(imageWidth int, imageHeight int)

Types

type Box 

type Box struct {
	Sides []Object
	Min   Vector
	Max   Vector
}

func NewBox 

func NewBox(p0 Vector, p1 Vector, mat Material) Box

type Camera 

type Camera struct {
	AspectRatio     float64
	ViewportHeight  float64
	ViewportWidth   float64
	FocalLength     float64
	Origin          Vector
	Horizontal      Vector
	Vertical        Vector
	LowerLeftCorner Vector
	LensRadius      float64
	U               Vector
	V               Vector
	W               Vector
}

func NewCamera 

func NewCamera(lookFrom Vector, lookAt Vector, viewUp Vector, vFov float64, aspectRatio float64, aperture float64, focusDist float64) Camera

func (Camera) GetRay 

func (cam Camera) GetRay(u float64, v float64) Ray

type Colour 

type Colour = Vector

type alias

func RandomColour 

func RandomColour() Colour

type ConstantMedium 

type ConstantMedium struct {
	Obj     Object
	Density float64
	Colour  Colour
}

type HitRecord 

type HitRecord struct {
	P         Vector
	Normal    Vector
	T         float64
	FrontFace bool
	Mat       Material
}

func (*HitRecord) SetFaceNormal 

func (h *HitRecord) SetFaceNormal(r Ray, outwardNormal Vector)

type Image 

type Image struct {
	Img *image.RGBA
	// contains filtered or unexported fields
}

func NewImage 

func NewImage(width int, height int, samplesPerPixel int) Image

func (*Image) SaveAsPng 

func (img *Image) SaveAsPng(filename string)

func (*Image) WriteColour 

func (img *Image) WriteColour(x int, y int, pixel Colour)

type Material 

type Material struct {
	Scatter ScatterFunc
	Colour  Colour
	Fuzz    float64
	Light   bool
}

type Object 

type Object interface {
	// contains filtered or unexported methods
}

type Ray 

type Ray struct {
	Origin    Vector
	Direction Vector
}

func (*Ray) At 

func (r *Ray) At(t float64) Vector

type RotateY 

type RotateY struct {
	P        Object
	Angle    float64
	CosTheta float64
	SinTheta float64
}

func NewRotateY 

func NewRotateY(p Object, angle float64) RotateY

type ScatterFunc 

type ScatterFunc func(rIn Ray, rec *HitRecord, attenuation *Vector, scattered *Ray, mat Material) bool

type Scene 

type Scene struct {
	Objects []Object
}

func (*Scene) AddObject 

func (s *Scene) AddObject(obj Object)

func (Scene) Hit 

func (s Scene) Hit(r Ray, tMin float64, tMax float64, rec *HitRecord) bool

type Sphere 

type Sphere struct {
	Center Vector
	Radius float64
	Mat    Material
}

type Translate 

type Translate struct {
	P      Object
	Offset Vector
}

type Vector 

type Vector struct {
	X float64
	Y float64
	Z float64
}

func RandomInUnitDisk 

func RandomInUnitDisk() Vector

func RandomInUnitSphere 

func RandomInUnitSphere() Vector

func RandomUnitVector 

func RandomUnitVector() Vector

func RandomVector 

func RandomVector(min float64, max float64) Vector

func Reflect 

func Reflect(v Vector, n Vector) Vector

func Refract 

func Refract(uv Vector, n Vector, etaiOverEtat float64) Vector

func (Vector) Add 

func (v Vector) Add(v2 Vector) Vector

func (Vector) Cross 

func (v Vector) Cross(v2 Vector) Vector

func (Vector) Divide 

func (v Vector) Divide(v2 Vector) Vector

func (Vector) DivideN 

func (v Vector) DivideN(n float64) Vector

func (Vector) Dot 

func (v Vector) Dot(v2 Vector) float64

func (Vector) Length 

func (v Vector) Length() float64

func (Vector) LengthSquared 

func (v Vector) LengthSquared() float64

func (Vector) Minus 

func (v Vector) Minus(v2 Vector) Vector

func (Vector) MinusN 

func (v Vector) MinusN(n float64) Vector

func (Vector) Multiply 

func (v Vector) Multiply(v2 Vector) Vector

func (Vector) MultiplyN 

func (v Vector) MultiplyN(n float64) Vector

func (Vector) NearZero 

func (v Vector) NearZero() bool

func (Vector) UnitVector 

func (v Vector) UnitVector() Vector

type XYRect 

type XYRect struct {
	X0  float64
	X1  float64
	Y0  float64
	Y1  float64
	K   float64
	Mat Material
}

type XZRect 

type XZRect struct {
	X0  float64
	X1  float64
	Z0  float64
	Z1  float64
	K   float64
	Mat Material
}

type YZRect 

type YZRect struct {
	Y0  float64
	Y1  float64
	Z0  float64
	Z1  float64
	K   float64
	Mat Material
}

Source Files

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