object

package
v0.0.0-...-534c38e Latest Latest
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 Go to latest Published: Aug 6, 2022 License: MIT Imports: 10 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var (
	Black = NewColor(0, 0, 0)
	White = NewColor(1, 1, 1)
	Red   = NewColor(1, 0, 0)
	Green = NewColor(0, 1, 0)
	Blue  = NewColor(0, 0, 1)
)
View Source 
var NoHit = Intersection{}

Functions

func NormalAt 

func NormalAt(xs Intersection, worldPoint ray.Vector) ray.Vector

Types

type BasicObject 

type BasicObject struct {
	Transform ray.Matrix
	Material  Material
}

type Group 

type Group struct {
	Children []Object
	// contains filtered or unexported fields
}

func NewGroup 

func NewGroup(opts ...Option) Group

func (*Group) AddChild 

func (g *Group) AddChild(children ...Object)

func (Group) LocalIntersect 

func (g Group) LocalIntersect(r ray.Ray) (xs Intersections)

func (Group) LocalNormalAt 

func (g Group) LocalNormalAt(worldPoint ray.Vector, _ Intersection) ray.Vector

func (Group) Material 

func (o Group) Material() Material

func (Group) NormalToWorld 

func (o Group) NormalToWorld(normaVector ray.Vector) (resultVector ray.Vector)

func (Group) Object 

func (g Group) Object() Object

func (Group) Parent 

func (o Group) Parent() Object

func (*Group) SetMaterial 

func (o *Group) SetMaterial(m Material)

func (*Group) SetParent 

func (o *Group) SetParent(obj Object)

func (*Group) SetTransform 

func (o *Group) SetTransform(t ray.Matrix) error

func (Group) Transform 

func (o Group) Transform() ray.Matrix

func (Group) TransformInverse 

func (o Group) TransformInverse() ray.Matrix

func (Group) WorldToObject 

func (o Group) WorldToObject(worldPoint ray.Vector) (point ray.Vector)

type Intersection 

type Intersection struct {
	T    float64 // Intersection value
	Obj  Object  // Intersected object
	U, V float64 // UV value between 0 - 1
}

func Hit 

func Hit(intersections Intersections) Intersection

type Intersections 

type Intersections []Intersection

func Intersect 

func Intersect(obj Object, rr ray.Ray) Intersections

type Material 

type Material struct {
	Color                                                                            RGB
	Pattern                                                                          Pattern
	Ambient, Diffuse, Specular, Shininess, Reflective, Transparency, RefractiveIndex float64
}

func DefaultMaterial 

func DefaultMaterial() Material

func NewMaterial 

func NewMaterial(color RGB,
	ambient, diffuse, specular, shininess, reflective, transparency, refractiveIndex float64) Material

type Object 

type Object interface {
	LocalIntersect(ray ray.Ray) Intersections
	LocalNormalAt(worldPoint ray.Vector, hit Intersection) ray.Vector

	Transform() ray.Matrix
	TransformInverse() ray.Matrix
	SetTransform(t ray.Matrix) error

	Material() (m Material)
	SetMaterial(m Material)

	Parent() Object
	SetParent(obj Object)

	WorldToObject(worldPoint ray.Vector) (point ray.Vector)
	NormalToWorld(normalVector ray.Vector) (vector ray.Vector)
}

func DefaultCone 

func DefaultCone() Object

func DefaultCylinder 

func DefaultCylinder() Object

func DefaultGlassSphere 

func DefaultGlassSphere() Object

func DefaultMetalSphere 

func DefaultMetalSphere() Object

func DefaultSphere 

func DefaultSphere(opts ...Option) Object

func NewCone 

func NewCone(minimum, maximum float64, closed bool) Object

func NewCube 

func NewCube() Object

func NewCylinder 

func NewCylinder(minimum, maximum float64, closed bool) Object

func NewGlassSphere 

func NewGlassSphere(center ray.Vector, radius float64, opts ...Option) (s Object)

func NewHexagon 

func NewHexagon(opts ...Option) (hex Object)

func NewMetalSphere 

func NewMetalSphere(center ray.Vector, radius float64, opts ...Option) (s Object)

func NewPlane 

func NewPlane(opts ...Option) Object

func NewSmoothTriangle 

func NewSmoothTriangle(p1, p2, p3, n1, n2, n3 ray.Vector, opts ...Option) Object

func NewSphere 

func NewSphere(center ray.Vector, radius float64, opts ...Option) Object

func NewTestShape 

func NewTestShape(opts ...Option) Object

func NewTriangle 

func NewTriangle(p1, p2, p3 ray.Vector, opts ...Option) Object

type Option 

type Option interface {
	Apply(object Object)
}

func WithChildren 

func WithChildren(objs ...Object) Option

func WithMaterial 

func WithMaterial(m Material) Option

func WithNormals 

func WithNormals(n1, n2, n3 ray.Vector) Option

func WithTransform 

func WithTransform(t ray.Matrix) Option

type OptionFunc 

type OptionFunc func(object Object)

func (OptionFunc) Apply 

func (of OptionFunc) Apply(o Object)

type Pattern 

type Pattern struct {
	Transform        ray.Matrix
	TransformInverse ray.Matrix
	At               func(point ray.Vector) RGB
	IsNotEmpty       bool
}

func EmptyPattern 

func EmptyPattern() Pattern

func NewCheckerPattern 

func NewCheckerPattern(a, b RGB) (p Pattern)

func NewGradientPattern 

func NewGradientPattern(a, b RGB) (p Pattern)

func NewRingPattern 

func NewRingPattern(a, b RGB) (p Pattern)

func NewStripePattern 

func NewStripePattern(a, b RGB) (p Pattern)

func NewTestPattern 

func NewTestPattern() (p Pattern)

func (Pattern) AtObj 

func (p Pattern) AtObj(obj Object, worldPoint ray.Vector) RGB

func (*Pattern) SetTransform 

func (p *Pattern) SetTransform(transform ray.Matrix) error

type PointLight 

type PointLight struct {
	Position  ray.Vector
	Intensity RGB
}

func NewPointLight 

func NewPointLight(position ray.Vector, intensity RGB) PointLight

type RGB 

type RGB struct {
	R, G, B float64
}

func Lighting 

func Lighting(
	material Material,
	obj Object,
	light PointLight,
	position, eyev, normalv ray.Vector,
	inShadows bool) RGB

func NewColor 

func NewColor(red, green, blue float64) RGB

func (RGB) Add 

func (r RGB) Add(c RGB) RGB

func (RGB) Multiply 

func (r RGB) Multiply(c RGB) RGB

Technically Hadamard product or Schur product

func (RGB) MultiplyBy 

func (r RGB) MultiplyBy(scalar float64) RGB

func (RGB) Plus 

func (r RGB) Plus(c RGB) RGB

func (RGB) Subtract 

func (r RGB) Subtract(c RGB) RGB

type StripePattern 

type StripePattern struct {
	Pattern
	A, B RGB
}

type WavefrontObj 

type WavefrontObj struct {
	Vertices,
	Normals []ray.Vector
	Group Group
}

func NewWavefrontObj 

func NewWavefrontObj(reader io.Reader, opts ...Option) (wv WavefrontObj, err error)

func (*WavefrontObj) Object 

func (w *WavefrontObj) Object() Object

Source Files

View all Source files

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