pt

package
v0.0.0-...-23d6da2 Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: Jan 26, 2016 License: MIT Imports: 20 Imported by: 0

Documentation

Index

Constants

View Source 
const EPS = 1e-9
View Source 
const INF = 1e9

Variables

View Source 
var NoAttenuation = Attenuation{1, 0, 0}
View Source 
var NoHit = Hit{nil, INF}
View Source 
var RenderConfig = struct {
	CameraSamples int
	HitSamples    int
	Bounces       int
	Width         int
	Height        int
}{
	-1,
	16,
	4,
	1024,
	768,
}

Functions

func ClampInt 

func ClampInt(x, lo, hi int) int

func Degrees 

func Degrees(radians float64) float64

func DurationString 

func DurationString(d time.Duration) string

func Fract 

func Fract(x float64) float64

func LoadJPG 

func LoadJPG(path string) (image.Image, error)

func LoadMTL 

func LoadMTL(path string, parent Material, materials map[string]*Material) error

func LoadPNG 

func LoadPNG(path string) (image.Image, error)

func Median 

func Median(items []float64) float64

func NumberString 

func NumberString(x float64) string

func ParseFloats 

func ParseFloats(items []string) []float64

func ParseInts 

func ParseInts(items []string) []int

func Radians 

func Radians(degrees float64) float64

func RelativePath 

func RelativePath(path1, path2 string) string

func Render 

func Render(scene *Scene, camera *Camera) chan pixelRenderResult

func RenderToWindow 

func RenderToWindow(pixelRenderResult chan pixelRenderResult)

func SaveBinarySTL 

func SaveBinarySTL(path string, mesh *Mesh) error

func SavePNG 

func SavePNG(path string, im image.Image) error

Types

type Attenuation 

type Attenuation struct {
	Constant  float64
	Linear    float64
	Quadratic float64
}

func LinearAttenuation 

func LinearAttenuation(x float64) Attenuation

func QuadraticAttenuation 

func QuadraticAttenuation(x float64) Attenuation

func (*Attenuation) Compute 

func (a *Attenuation) Compute(d float64) float64

type Axis 

type Axis uint8
const (
	AxisNone Axis = iota
	AxisX
	AxisY
	AxisZ
)

type Box 

type Box struct {
	Min, Max Vector
}

func BoxForShapes 

func BoxForShapes(shapes []Shape) Box

func BoxForTriangles 

func BoxForTriangles(shapes []*Triangle) Box

func (Box) Anchor 

func (a Box) Anchor(anchor Vector) Vector

func (Box) Center 

func (a Box) Center() Vector

func (Box) Extend 

func (a Box) Extend(b Box) Box

func (*Box) Intersect 

func (b *Box) Intersect(r Ray) (float64, float64)

func (*Box) Partition 

func (b *Box) Partition(axis Axis, point float64) (left, right bool)

func (Box) Size 

func (a Box) Size() Vector

type Camera 

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

func LookAt 

func LookAt(eye, center, up Vector, fovy float64) Camera

func (*Camera) CastRay 

func (c *Camera) CastRay(x, y int, u, v float64) Ray

func (*Camera) SetFocus 

func (c *Camera) SetFocus(focalPoint Vector, apertureRadius float64)

type Color 

type Color struct {
	R, G, B float64
}

func HexColor 

func HexColor(x int) Color

func NewColor 

func NewColor(c color.Color) Color

NewColor

func (Color) Add 

func (a Color) Add(b Color) Color

func (Color) DivScalar 

func (a Color) DivScalar(b float64) Color

func (Color) Max 

func (a Color) Max(b Color) Color

func (Color) Min 

func (a Color) Min(b Color) Color

func (Color) Mix 

func (a Color) Mix(b Color, pct float64) Color

func (Color) Mul 

func (a Color) Mul(b Color) Color

func (Color) MulScalar 

func (a Color) MulScalar(b float64) Color

func (Color) Pow 

func (a Color) Pow(b float64) Color

func (Color) RGBA 

func (a Color) RGBA() color.RGBA

func (Color) Sub 

func (a Color) Sub(b Color) Color

type ColorTexture 

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

func (*ColorTexture) BumpSample 

func (t *ColorTexture) BumpSample(u, v float64) Vector

func (*ColorTexture) NormalSample 

func (t *ColorTexture) NormalSample(u, v float64) Vector

func (*ColorTexture) Sample 

func (t *ColorTexture) Sample(u, v float64) Color

type Cube 

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

func (*Cube) Box 

func (c *Cube) Box() Box

func (*Cube) Color 

func (c *Cube) Color(p Vector) Color

func (*Cube) Compile 

func (c *Cube) Compile()

func (*Cube) Intersect 

func (c *Cube) Intersect(r Ray) Hit

func (*Cube) Material 

func (c *Cube) Material(p Vector) Material

func (*Cube) Normal 

func (c *Cube) Normal(p Vector) Vector

func (*Cube) RandomPoint 

func (c *Cube) RandomPoint() Vector

type Hit 

type Hit struct {
	Shape Shape
	T     float64
}

func (*Hit) Info 

func (hit *Hit) Info(r Ray) HitInfo

func (*Hit) Ok 

func (hit *Hit) Ok() bool

type HitInfo 

type HitInfo struct {
	Shape    Shape
	Position Vector
	Normal   Vector
	Ray      Ray
	Color    Color
	Material Material
	Inside   bool
}

type Material 

type Material struct {
	Color          Color
	Texture        Texture
	NormalTexture  Texture
	BumpTexture    Texture
	BumpMultiplier float64
	Emittance      float64
	Attenuation    Attenuation
	Index          float64 // refractive index
	Gloss          float64 // reflection cone angle in radians
	Tint           float64 // specular and refractive tinting
	Transparent    bool
}

func ClearMaterial 

func ClearMaterial(index, gloss float64) Material

func DiffuseMaterial 

func DiffuseMaterial(color Color) Material

func GlossyMaterial 

func GlossyMaterial(color Color, index, gloss float64) Material

func LightMaterial 

func LightMaterial(color Color, emittance float64, attenuation Attenuation) Material

func SpecularMaterial 

func SpecularMaterial(color Color, index float64) Material

func TransparentMaterial 

func TransparentMaterial(color Color, index, gloss, tint float64) Material

type Matrix 

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

func Frustum 

func Frustum(l, r, b, t, n, f float64) Matrix

func Identity 

func Identity() Matrix

func LookAtMatrix 

func LookAtMatrix(eye, center, up Vector, fovy float64) Matrix

func Orthographic 

func Orthographic(l, r, b, t, n, f float64) Matrix

func Perspective 

func Perspective(fovy, aspect, near, far float64) Matrix

func Rotate 

func Rotate(v Vector, a float64) Matrix

func Scale 

func Scale(v Vector) Matrix

func Translate 

func Translate(v Vector) Matrix

func (Matrix) Determinant 

func (a Matrix) Determinant() float64

func (Matrix) Frustum 

func (m Matrix) Frustum(l, r, b, t, n, f float64) Matrix

func (Matrix) Inverse 

func (a Matrix) Inverse() Matrix

func (Matrix) Mul 

func (a Matrix) Mul(b Matrix) Matrix

func (Matrix) MulBox 

func (a Matrix) MulBox(box Box) Box

func (Matrix) MulDirection 

func (a Matrix) MulDirection(b Vector) Vector

func (Matrix) MulPosition 

func (a Matrix) MulPosition(b Vector) Vector

func (Matrix) MulRay 

func (a Matrix) MulRay(b Ray) Ray

func (Matrix) Orthographic 

func (m Matrix) Orthographic(l, r, b, t, n, f float64) Matrix

func (Matrix) Perspective 

func (m Matrix) Perspective(fovy, aspect, near, far float64) Matrix

func (Matrix) Rotate 

func (m Matrix) Rotate(v Vector, a float64) Matrix

func (Matrix) Scale 

func (m Matrix) Scale(v Vector) Matrix

func (Matrix) Translate 

func (m Matrix) Translate(v Vector) Matrix

func (Matrix) Transpose 

func (a Matrix) Transpose() Matrix

type Mesh 

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

func LoadBinarySTL 

func LoadBinarySTL(path string, material Material) (*Mesh, error)

func LoadOBJ 

func LoadOBJ(path string, parent Material) (*Mesh, error)

func LoadSTL 

func LoadSTL(path string, material Material) (*Mesh, error)

func NewMesh 

func NewMesh(triangles []*Triangle) *Mesh

func (*Mesh) Box 

func (m *Mesh) Box() Box

func (*Mesh) Color 

func (m *Mesh) Color(p Vector) Color

func (*Mesh) Compile 

func (m *Mesh) Compile()

func (*Mesh) FitInside 

func (m *Mesh) FitInside(box Box, anchor Vector)

func (*Mesh) Intersect 

func (m *Mesh) Intersect(r Ray) Hit

func (*Mesh) Material 

func (m *Mesh) Material(p Vector) Material

func (*Mesh) MoveTo 

func (m *Mesh) MoveTo(position, anchor Vector)

func (*Mesh) Normal 

func (m *Mesh) Normal(p Vector) Vector

func (*Mesh) RandomPoint 

func (m *Mesh) RandomPoint() Vector

func (*Mesh) SaveBinarySTL 

func (m *Mesh) SaveBinarySTL(path string) error

func (*Mesh) SmoothNormals 

func (m *Mesh) SmoothNormals()

func (*Mesh) SmoothNormalsThreshold 

func (m *Mesh) SmoothNormalsThreshold(radians float64)

func (*Mesh) Transform 

func (m *Mesh) Transform(matrix Matrix)

func (*Mesh) Triangles 

func (m *Mesh) Triangles() []*Triangle

func (*Mesh) UnitCube 

func (m *Mesh) UnitCube()

func (*Mesh) UpdateBox 

func (m *Mesh) UpdateBox()

type Node 

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

func NewNode 

func NewNode(shapes []Shape) *Node

func (*Node) Intersect 

func (node *Node) Intersect(r Ray, tmin, tmax float64) Hit

func (*Node) IntersectShapes 

func (node *Node) IntersectShapes(r Ray) Hit

func (*Node) Partition 

func (node *Node) Partition(size int, axis Axis, point float64) (left, right []Shape)

func (*Node) PartitionScore 

func (node *Node) PartitionScore(axis Axis, point float64) int

func (*Node) Split 

func (node *Node) Split(depth int)

type Ray 

type Ray struct {
	Origin, Direction Vector
}

func (Ray) Bounce 

func (i Ray) Bounce(info *HitInfo, p, u, v float64) (Ray, bool)

func (Ray) ConeBounce 

func (r Ray) ConeBounce(theta, u, v float64) Ray

func (Ray) Position 

func (r Ray) Position(t float64) Vector

func (Ray) Reflect 

func (n Ray) Reflect(i Ray) Ray

func (Ray) Reflectance 

func (n Ray) Reflectance(i Ray, n1, n2 float64) float64

func (Ray) Refract 

func (n Ray) Refract(i Ray, n1, n2 float64) Ray

func (Ray) WeightedBounce 

func (r Ray) WeightedBounce(u, v float64) Ray

type STLHeader 

type STLHeader struct {
	Count uint32
	// contains filtered or unexported fields
}

type STLTriangle 

type STLTriangle struct {
	V1, V2, V3 [3]float32
	// contains filtered or unexported fields
}

type Scene 

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

func (*Scene) Add 

func (s *Scene) Add(shape Shape)

func (*Scene) Compile 

func (s *Scene) Compile()

func (*Scene) DirectLight 

func (s *Scene) DirectLight(n Ray) Color

func (*Scene) Intersect 

func (s *Scene) Intersect(r Ray) Hit

func (*Scene) RayCount 

func (s *Scene) RayCount() uint64

func (*Scene) Sample 

func (s *Scene) Sample(r Ray, emission bool, samples, depth int) Color

func (*Scene) SetColor 

func (s *Scene) SetColor(color Color)

func (*Scene) SetVisibility 

func (s *Scene) SetVisibility(visibility float64)

func (*Scene) Shadow 

func (s *Scene) Shadow(r Ray, light Shape, max float64) bool

type Shape 

type Shape interface {
	Compile()
	Box() Box
	Intersect(Ray) Hit
	Color(Vector) Color
	Material(Vector) Material
	Normal(Vector) Vector
	RandomPoint() Vector
}

func NewCube 

func NewCube(min, max Vector, material Material) Shape

func NewSphere 

func NewSphere(center Vector, radius float64, material Material) Shape

func NewTransformedShape 

func NewTransformedShape(s Shape, m Matrix) Shape

type Sphere 

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

func (*Sphere) Box 

func (s *Sphere) Box() Box

func (*Sphere) Color 

func (s *Sphere) Color(p Vector) Color

func (*Sphere) Compile 

func (s *Sphere) Compile()

func (*Sphere) Intersect 

func (s *Sphere) Intersect(r Ray) Hit

func (*Sphere) Material 

func (s *Sphere) Material(p Vector) Material

func (*Sphere) Normal 

func (s *Sphere) Normal(p Vector) Vector

func (*Sphere) RandomPoint 

func (s *Sphere) RandomPoint() Vector

type Texture 

type Texture interface {
	Sample(u, v float64) Color
	NormalSample(u, v float64) Vector
	BumpSample(u, v float64) Vector
}

func GetTexture 

func GetTexture(path string) Texture

func JPGTexture 

func JPGTexture(path string) (Texture, error)

func LoadTexture 

func LoadTexture(p string) (Texture, error)

func NewTexture 

func NewTexture(im image.Image) Texture

func PNGTexture 

func PNGTexture(path string) (Texture, error)

type TransformedShape 

type TransformedShape struct {
	Shape
	// contains filtered or unexported fields
}

func (*TransformedShape) Box 

func (s *TransformedShape) Box() Box

func (*TransformedShape) Color 

func (s *TransformedShape) Color(p Vector) Color

func (*TransformedShape) Intersect 

func (s *TransformedShape) Intersect(r Ray) Hit

func (*TransformedShape) Material 

func (s *TransformedShape) Material(p Vector) Material

func (*TransformedShape) Normal 

func (s *TransformedShape) Normal(p Vector) Vector

func (*TransformedShape) RandomPoint 

func (s *TransformedShape) RandomPoint() Vector

type Tree 

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

func NewTree 

func NewTree(shapes []Shape) *Tree

func (*Tree) Intersect 

func (tree *Tree) Intersect(r Ray) Hit

type Triangle 

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

func NewTriangle 

func NewTriangle(v1, v2, v3, t1, t2, t3 Vector, material Material) *Triangle

func (*Triangle) Area 

func (t *Triangle) Area() float64

func (*Triangle) Barycentric 

func (t *Triangle) Barycentric(p Vector) (u, v, w float64)

func (*Triangle) Box 

func (t *Triangle) Box() Box

func (*Triangle) Color 

func (t *Triangle) Color(p Vector) Color

func (*Triangle) Compile 

func (t *Triangle) Compile()

func (*Triangle) FixNormals 

func (t *Triangle) FixNormals()

func (*Triangle) Intersect 

func (t *Triangle) Intersect(r Ray) Hit

func (*Triangle) Material 

func (t *Triangle) Material(p Vector) Material

func (*Triangle) Normal 

func (t *Triangle) Normal(p Vector) Vector

func (*Triangle) RandomPoint 

func (t *Triangle) RandomPoint() Vector

func (*Triangle) UpdateBox 

func (t *Triangle) UpdateBox()

func (*Triangle) Vertices 

func (t *Triangle) Vertices() (Vector, Vector, Vector)

type Vector 

type Vector struct {
	X, Y, Z float64
}

func PoissonDisc 

func PoissonDisc(x1, y1, x2, y2, r float64, n int) []Vector

func (Vector) Add 

func (a Vector) Add(b Vector) Vector

func (Vector) Cross 

func (a Vector) Cross(b Vector) Vector

func (Vector) Div 

func (a Vector) Div(b Vector) Vector

func (Vector) DivScalar 

func (a Vector) DivScalar(b float64) Vector

func (Vector) Dot 

func (a Vector) Dot(b Vector) float64

func (Vector) Length 

func (a Vector) Length() float64

func (Vector) Max 

func (a Vector) Max(b Vector) Vector

func (Vector) Min 

func (a Vector) Min(b Vector) Vector

func (Vector) MinAxis 

func (a Vector) MinAxis() Vector

func (Vector) MinComponent 

func (a Vector) MinComponent() float64

func (Vector) Mul 

func (a Vector) Mul(b Vector) Vector

func (Vector) MulScalar 

func (a Vector) MulScalar(b float64) Vector

func (Vector) Normalize 

func (a Vector) Normalize() Vector

func (Vector) Reflect 

func (n Vector) Reflect(i Vector) Vector

func (Vector) Reflectance 

func (n Vector) Reflectance(i Vector, n1, n2 float64) float64

func (Vector) Refract 

func (n Vector) Refract(i Vector, n1, n2 float64) Vector

func (Vector) Sub 

func (a Vector) Sub(b Vector) Vector

Source Files

View all Source files

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL
go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more.