shapes

package
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 Go to latest Published: Dec 19, 2022 License: MIT Imports: 6 Imported by: 0

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Index

Constants

View Source 
const TriThreshold = 0.00000000001

Variables

This section is empty.

Functions

func Divide 

func Divide(s Shape, threshold int)

func FaceFromPoint 

func FaceFromPoint(point geom.Tuple4) int

func Flatten 

func Flatten(g *Group, groups *[]*Group)

Flatten is meaningless since each level of the hierarchy seems to build upon its parent's transform.

func IntersectRayWithBox 

func IntersectRayWithBox(ray geom.Ray, BoundingBox *BoundingBox) bool

func IntersectionAllowed 

func IntersectionAllowed(op string, lhit, inl, inr bool) bool

func MakeSubGroup 

func MakeSubGroup(g *Group, shapes ...Shape)

func PartitionChildren 

func PartitionChildren(g *Group) (*Group, *Group)

func SphericalMap 

func SphericalMap(p geom.Tuple4) (float64, float64)

func SplitBounds 

func SplitBounds(b1 *BoundingBox) (*BoundingBox, *BoundingBox)

SplitBounds splits the passed bounding box perpendicular of its longest axis. (Impl from bonus chapter)

Types

type AlignCheck 

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

type Basic 

type Basic struct {
	Id               int64
	Label            string
	Transform        geom.Mat4x4
	Inverse          geom.Mat4x4
	InverseTranspose geom.Mat4x4
	Material         material.Material
}

type BoundingBox 

type BoundingBox struct {
	Min geom.Tuple4
	Max geom.Tuple4
}

func BoundsOf 

func BoundsOf(shape Shape) *BoundingBox

func NewBoundingBox 

func NewBoundingBox(pointA geom.Tuple4, pointB geom.Tuple4) *BoundingBox

func NewBoundingBoxF 

func NewBoundingBoxF(x1, y1, z1, x2, y2, z2 float64) *BoundingBox

func NewEmptyBoundingBox 

func NewEmptyBoundingBox() *BoundingBox

func ParentSpaceBounds 

func ParentSpaceBounds(shape Shape) *BoundingBox

func TransformBoundingBox 

func TransformBoundingBox(bbox *BoundingBox, m1 geom.Mat4x4) *BoundingBox

func (*BoundingBox) Add 

func (b *BoundingBox) Add(p geom.Tuple4)

func (*BoundingBox) ContainsBox 

func (b *BoundingBox) ContainsBox(b2 *BoundingBox) bool

func (*BoundingBox) ContainsPoint 

func (b *BoundingBox) ContainsPoint(p geom.Tuple4) bool

func (*BoundingBox) MergeWith 

func (b *BoundingBox) MergeWith(b2 *BoundingBox)

type Cube 

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

func NewCube 

func NewCube() *Cube

func (*Cube) GetInverse 

func (c *Cube) GetInverse() geom.Mat4x4

func (*Cube) GetInverseTranspose 

func (c *Cube) GetInverseTranspose() geom.Mat4x4

func (*Cube) GetMaterial 

func (c *Cube) GetMaterial() material.Material

func (*Cube) GetParent 

func (c *Cube) GetParent() Shape

func (*Cube) GetTransform 

func (c *Cube) GetTransform() geom.Mat4x4

func (*Cube) ID 

func (c *Cube) ID() int64

func (*Cube) Lbl 

func (c *Cube) Lbl() string

func (*Cube) SetMaterial 

func (c *Cube) SetMaterial(material material.Material)

func (*Cube) SetParent 

func (c *Cube) SetParent(shape Shape)

func (*Cube) SetTransform 

func (c *Cube) SetTransform(transform geom.Mat4x4)

type Cylinder 

type Cylinder struct {
	Basic

	MinY float64
	MaxY float64
	// contains filtered or unexported fields
}

func NewCylinder 

func NewCylinder() *Cylinder

func NewCylinderMM 

func NewCylinderMM(min, max float64) *Cylinder

func NewCylinderMMC 

func NewCylinderMMC(min, max float64, closed bool) *Cylinder

func (*Cylinder) GetInverse 

func (c *Cylinder) GetInverse() geom.Mat4x4

func (*Cylinder) GetInverseTranspose 

func (c *Cylinder) GetInverseTranspose() geom.Mat4x4

func (*Cylinder) GetMaterial 

func (c *Cylinder) GetMaterial() material.Material

func (*Cylinder) GetParent 

func (c *Cylinder) GetParent() Shape

func (*Cylinder) GetTransform 

func (c *Cylinder) GetTransform() geom.Mat4x4

func (*Cylinder) ID 

func (c *Cylinder) ID() int64

func (*Cylinder) Init 

func (c *Cylinder) Init()

func (*Cylinder) Lbl 

func (c *Cylinder) Lbl() string

func (*Cylinder) SetMaterial 

func (c *Cylinder) SetMaterial(material material.Material)

func (*Cylinder) SetParent 

func (c *Cylinder) SetParent(shape Shape)

func (*Cylinder) SetTransform 

func (c *Cylinder) SetTransform(transform geom.Mat4x4)

type Group 

type Group struct {
	Id               int64
	Transform        geom.Mat4x4
	Inverse          geom.Mat4x4
	InverseTranspose geom.Mat4x4
	Material         material.Material
	Mtl              material.Mtl
	Label            string

	Children []Shape

	InnerRays   []geom.Ray
	XsCache     Intersections
	BoundingBox *BoundingBox

	CastShadow bool
	// contains filtered or unexported fields
}

func NewGroup 

func NewGroup() *Group

func (*Group) AddChild 

func (g *Group) AddChild(s Shape)

func (*Group) AddChildren 

func (g *Group) AddChildren(shapes ...Shape)

func (*Group) Bounds 

func (g *Group) Bounds()

func (*Group) BoundsToCube 

func (g *Group) BoundsToCube() *Cube

func (*Group) CastsShadow 

func (g *Group) CastsShadow() bool

func (*Group) GetInverse 

func (g *Group) GetInverse() geom.Mat4x4

func (*Group) GetInverseTranspose 

func (g *Group) GetInverseTranspose() geom.Mat4x4

func (*Group) GetLocalRay 

func (g *Group) GetLocalRay() geom.Ray

func (*Group) GetMaterial 

func (g *Group) GetMaterial() material.Material

func (*Group) GetParent 

func (g *Group) GetParent() Shape

func (*Group) GetTransform 

func (g *Group) GetTransform() geom.Mat4x4

func (*Group) ID 

func (g *Group) ID() int64

func (*Group) Lbl 

func (g *Group) Lbl() string

func (*Group) Name 

func (g *Group) Name() string

func (*Group) NormalAtLocal 

func (g *Group) NormalAtLocal(point geom.Tuple4, intersection *Intersection) geom.Tuple4

func (*Group) SetMaterial 

func (g *Group) SetMaterial(material material.Material)

func (*Group) SetParent 

func (g *Group) SetParent(shape Shape)

func (*Group) SetTransform 

func (g *Group) SetTransform(transform geom.Mat4x4)

type Intersection 

type Intersection struct {
	T float64
	S Shape
	U float64
	V float64
}

type Intersections 

type Intersections []Intersection

func (Intersections) Len 

func (xs Intersections) Len() int

func (Intersections) Less 

func (xs Intersections) Less(i, j int) bool

func (Intersections) Swap 

func (xs Intersections) Swap(i, j int)

type Plane 

type Plane struct {
	Basic
	// contains filtered or unexported fields
}

func NewPlane 

func NewPlane() *Plane

func (*Plane) GetInverse 

func (p *Plane) GetInverse() geom.Mat4x4

func (*Plane) GetInverseTranspose 

func (p *Plane) GetInverseTranspose() geom.Mat4x4

func (*Plane) GetMaterial 

func (p *Plane) GetMaterial() material.Material

func (*Plane) GetParent 

func (p *Plane) GetParent() Shape

func (*Plane) GetTransform 

func (p *Plane) GetTransform() geom.Mat4x4

func (*Plane) ID 

func (p *Plane) ID() int64

func (*Plane) Lbl 

func (p *Plane) Lbl() string

func (*Plane) SetMaterial 

func (p *Plane) SetMaterial(m material.Material)

SetMaterial passes a pointer to the Plane on which to set the material

func (*Plane) SetParent 

func (p *Plane) SetParent(shape Shape)

func (*Plane) SetTransform 

func (p *Plane) SetTransform(translation geom.Mat4x4)

SetTransform passes a pointer to the Plane on which to apply the translation matrix

type Shape 

type Shape interface {
	ID() int64
	Lbl() string
	GetTransform() geom.Mat4x4
	GetInverse() geom.Mat4x4
	GetInverseTranspose() geom.Mat4x4
	SetTransform(transform geom.Mat4x4)
	GetMaterial() material.Material
	SetMaterial(material material.Material)
	GetParent() Shape
	SetParent(shape Shape)
}

type Sphere 

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

func NewSphere 

func NewSphere() *Sphere

func (*Sphere) GetInverse 

func (s *Sphere) GetInverse() geom.Mat4x4

func (*Sphere) GetInverseTranspose 

func (s *Sphere) GetInverseTranspose() geom.Mat4x4

func (*Sphere) GetMaterial 

func (s *Sphere) GetMaterial() material.Material

func (*Sphere) GetParent 

func (s *Sphere) GetParent() Shape

func (*Sphere) GetTransform 

func (s *Sphere) GetTransform() geom.Mat4x4

func (*Sphere) ID 

func (s *Sphere) ID() int64

func (*Sphere) Lbl 

func (s *Sphere) Lbl() string

func (*Sphere) SetMaterial 

func (s *Sphere) SetMaterial(m material.Material)

SetMaterial passes a pointer to the Sphere on which to set the material

func (*Sphere) SetParent 

func (s *Sphere) SetParent(shape Shape)

func (*Sphere) SetTransform 

func (s *Sphere) SetTransform(translation geom.Mat4x4)

SetTransform passes a pointer to the Sphere on which to apply the translation matrix

type Triangle 

type Triangle struct {
	P1       geom.Tuple4
	P2       geom.Tuple4
	P3       geom.Tuple4
	E1       geom.Tuple4
	E2       geom.Tuple4
	N        geom.Tuple4
	N1       geom.Tuple4
	N2       geom.Tuple4
	N3       geom.Tuple4
	Material material.Material
	Label    string

	D00   float64
	D01   float64
	D11   float64
	Denom float64
	// contains filtered or unexported fields
}

func DefaultTriangle 

func DefaultTriangle() *Triangle

func NewTriangle 

func NewTriangle(p1 geom.Tuple4, p2 geom.Tuple4, p3 geom.Tuple4, n1 geom.Tuple4, n2 geom.Tuple4, n3 geom.Tuple4) *Triangle

func NewTriangle3P 

func NewTriangle3P(p1 geom.Tuple4, p2 geom.Tuple4, p3 geom.Tuple4) *Triangle

func NewTriangleN 

func NewTriangleN(p1 geom.Tuple4, p2 geom.Tuple4, p3 geom.Tuple4) *Triangle

func (*Triangle) Barycentric 

func (s *Triangle) Barycentric(p geom.Tuple4, u *float64, v *float64, w *float64)

Barycentric computes barycentric coordinates (u, v, w) for point p with respect to triangle defined by pre-computed vectors E1 and E2, which was derived into points d00, d01, d11 and denominator in constructor func.

func (*Triangle) GetInverse 

func (s *Triangle) GetInverse() geom.Mat4x4

func (*Triangle) GetInverseTranspose 

func (s *Triangle) GetInverseTranspose() geom.Mat4x4

func (*Triangle) GetLocalRay 

func (s *Triangle) GetLocalRay() geom.Ray

func (*Triangle) GetMaterial 

func (s *Triangle) GetMaterial() material.Material

func (*Triangle) GetParent 

func (s *Triangle) GetParent() Shape

func (*Triangle) GetTransform 

func (s *Triangle) GetTransform() geom.Mat4x4

func (*Triangle) ID 

func (s *Triangle) ID() int64

func (*Triangle) IntersectLocal 

func (s *Triangle) IntersectLocal(ray geom.Ray) []Intersection

func (*Triangle) Lbl 

func (s *Triangle) Lbl() string

func (*Triangle) Name 

func (s *Triangle) Name() string

func (*Triangle) NormalAtLocal 

func (s *Triangle) NormalAtLocal(point geom.Tuple4, intersection *Intersection) geom.Tuple4

func (*Triangle) SetMaterial 

func (s *Triangle) SetMaterial(material material.Material)

func (*Triangle) SetParent 

func (s *Triangle) SetParent(shape Shape)

func (*Triangle) SetTransform 

func (s *Triangle) SetTransform(transform geom.Mat4x4)

Source Files

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