geom

package module
v0.0.0-...-96f3e8a Latest Latest
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 Go to latest Published: Jan 3, 2018 License: BSD-2-Clause-Views Imports: 2 Imported by: 32

Documentation

Index

Constants

This section is empty.

Variables

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var Debug = false

Functions

func CoordChan 

func CoordChan(points []Coord) (ch <-chan Coord)

func CrossProduct 

func CrossProduct(p, q Coord) (z float64)

func DotProduct 

func DotProduct(p, q Coord) (r float64)

func RectsEqual 

func RectsEqual(r1, r2 Rect) bool

func RectsIntersect 

func RectsIntersect(r1, r2 Rect) bool

func RectsIntersectStrict 

func RectsIntersectStrict(r1, r2 Rect) bool

func VectorAngle 

func VectorAngle(X, Y Coord) (r float64)

func VertexAngle 

func VertexAngle(A, B, C Coord) (r float64)

Types

type Bounded 

type Bounded interface {
	Bounds() (bounds Rect)
}

type Coord 

type Coord struct {
	X, Y float64
}

func LineIntersection 

func LineIntersection(l1, l2 Line) (p Coord)

func (Coord) DistanceFrom 

func (p Coord) DistanceFrom(q Coord) (d float64)

func (Coord) DistanceFromSquared 

func (p Coord) DistanceFromSquared(q Coord) (ds float64)

func (*Coord) Equals 

func (p *Coord) Equals(oi interface{}) (equals bool)

func (Coord) EqualsCoord 

func (p Coord) EqualsCoord(q Coord) bool

func (*Coord) Hashcode 

func (p *Coord) Hashcode() (hash uint64)

func (Coord) Magnitude 

func (p Coord) Magnitude() (m float64)

func (Coord) MagnitudeSquared 

func (p Coord) MagnitudeSquared() (ms float64)

func (Coord) Minus 

func (p Coord) Minus(q Coord) (r Coord)

func (Coord) Plus 

func (p Coord) Plus(q Coord) (r Coord)

func (Coord) QuadMM 

func (p Coord) QuadMM(q Coord) bool

func (Coord) QuadMP 

func (p Coord) QuadMP(q Coord) bool

func (Coord) QuadPM 

func (p Coord) QuadPM(q Coord) bool

func (Coord) QuadPP 

func (p Coord) QuadPP(q Coord) bool

func (*Coord) Rotate 

func (p *Coord) Rotate(rad float64)

func (*Coord) RotateLeft 

func (p *Coord) RotateLeft()

func (*Coord) RotateRight 

func (p *Coord) RotateRight()

func (*Coord) Scale 

func (p *Coord) Scale(xfactor, yfactor float64)

func (Coord) Times 

func (p Coord) Times(s float64) (r Coord)

func (*Coord) Translate 

func (p *Coord) Translate(offset Coord)

func (Coord) Unit 

func (p Coord) Unit() (u Coord)

type Line 

type Line struct {
	Intersection Coord
	Normal       Coord
}

A line that goes through Intersection and has a normal Normal.

type Path 

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

func (*Path) AddVertex 

func (p *Path) AddVertex(v Coord)

func (*Path) Bounds 

func (p *Path) Bounds() (bounds *Rect)

func (*Path) Clone 

func (p *Path) Clone() (op *Path)

func (*Path) Equals 

func (p *Path) Equals(oi interface{}) bool

func (*Path) Error 

func (me *Path) Error(other *Path) (offset Coord, error float64)

func (*Path) InsertVertexAfter 

func (p *Path) InsertVertexAfter(v Coord, index int)

func (*Path) Length 

func (p *Path) Length() int

func (*Path) Register 

func (p *Path) Register(op *Path) (offset Coord, match bool)

func (*Path) Rotate 

func (p *Path) Rotate(rad float64)

func (*Path) Scale 

func (p *Path) Scale(xf, yf float64)

func (*Path) Translate 

func (p *Path) Translate(offset Coord)

func (*Path) Vertices 

func (p *Path) Vertices() (v []Coord)

type Polygon 

type Polygon struct {
	Path
}

func (*Polygon) Bisect 

func (me *Polygon) Bisect(i, j int) (p1, p2 *Polygon)

bisect a polygon by joining vertices i and j

func (*Polygon) Clone 

func (p *Polygon) Clone() (op *Polygon)

func (*Polygon) ContainsCoord 

func (me *Polygon) ContainsCoord(p Coord) bool

func (*Polygon) Equals 

func (p *Polygon) Equals(oi interface{}) bool

func (*Polygon) Error 

func (me *Polygon) Error(other *Polygon) (offset Coord, error float64)

func (*Polygon) Register 

func (p *Polygon) Register(op *Polygon) (offset Coord, match bool)

func (*Polygon) Segment 

func (me *Polygon) Segment(index int) (s *Segment)

func (*Polygon) Triangles 

func (me *Polygon) Triangles() (tris []Triangle, ok bool)

func (*Polygon) Vertex 

func (me *Polygon) Vertex(index int) (v Coord)

func (*Polygon) VertexAngle 

func (me *Polygon) VertexAngle(index int) (r float64)

func (*Polygon) WindingOrder 

func (me *Polygon) WindingOrder() (winding float64)

type Rect 

type Rect struct {
	Min, Max Coord
}

func NilRect 

func NilRect() (r Rect)

this rect contains nothing

func RectsIntersection 

func RectsIntersection(r1, r2 Rect) (ri Rect)

func (Rect) Bounds 

func (r Rect) Bounds() (bounds Rect)

func (Rect) Center 

func (r Rect) Center() (center Coord)

func (Rect) ContainsCoord 

func (r Rect) ContainsCoord(p Coord) bool

func (Rect) ContainsRect 

func (r Rect) ContainsRect(o Rect) bool

func (Rect) Equals 

func (r Rect) Equals(oi interface{}) bool

func (*Rect) ExpandToContain 

func (r *Rect) ExpandToContain(ch <-chan Coord)

func (*Rect) ExpandToContainCoord 

func (r *Rect) ExpandToContainCoord(p Coord)

func (*Rect) ExpandToContainRect 

func (r *Rect) ExpandToContainRect(q Rect)

func (Rect) Height 

func (r Rect) Height() float64

func (*Rect) Scale 

func (r *Rect) Scale(xf, yf float64)

func (Rect) Size 

func (r Rect) Size() (w, h float64)

func (Rect) String 

func (r Rect) String() string

func (*Rect) Translate 

func (r *Rect) Translate(offset Coord)

func (Rect) Width 

func (r Rect) Width() float64

type Segment 

type Segment struct {
	A, B Coord
}

func (*Segment) Extrapolate 

func (s *Segment) Extrapolate(t float64) (p Coord)

func (*Segment) IntersectParameters 

func (s *Segment) IntersectParameters(t *Segment) (ps, pt float64)

func (*Segment) Intersection 

func (s *Segment) Intersection(t *Segment) (p Coord, ok bool)

type Transformable 

type Transformable interface {
	Translate(offset Coord)
	Rotate(rad float64)
	Scale(xfactor, yfactor float64)
}

type Triangle 

type Triangle struct {
	A, B, C Coord
}

func (*Triangle) Bounds 

func (me *Triangle) Bounds() (bounds *Rect)

func (*Triangle) ContainsCoord 

func (me *Triangle) ContainsCoord(p Coord) bool

func (*Triangle) Equals 

func (me *Triangle) Equals(oi interface{}) bool

func (*Triangle) HasVertex 

func (me *Triangle) HasVertex(v Coord) bool

func (*Triangle) Vertices 

func (me *Triangle) Vertices() (vertices []Coord)

Source Files

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