primitive

package

v0.0.1 Latest Latest Go to latest Published: Jun 24, 2021 License: GPL-3.0 Imports: 4 Imported by: 0

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Repository

github.com/changkun/polyred

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Documentation ¶

Index ¶

type AABB
- func NewAABB(vs ...math.Vector) AABB
type Face
type Halfedge
type Polygon
- func NewPolygon(vs ...*Vertex) (*Polygon, error)
type Quad
- func NewQuad(v1, v2, v3, v4 *Vertex) *Quad
type Triangle
- func NewTriangle(v1, v2, v3 *Vertex) *Triangle
type Vertex
- func NewRandomVertex() *Vertex
- func (v *Vertex) AABB() AABB

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

This section is empty.

Types ¶

type AABB ¶

type AABB struct {
	Min, Max math.Vector
}

AABB an axis aligned bounding box

func NewAABB ¶

func NewAABB(vs ...math.Vector) AABB

NewAABB computes a new axis aligned bounding box of given vertices

func (*AABB) Add ¶

func (aabb *AABB) Add(aabb2 AABB)

Add adds a given aabb to the current aabb

func (AABB) Eq ¶

func (aabb AABB) Eq(aabb2 AABB) bool

Eq checks if two aabbs are equal

func (*AABB) Intersect ¶

func (aabb *AABB) Intersect(aabb2 AABB) bool

Intersect checks if the two given AABBs share an intersection. If the two AABBs only share a single vertex or a 2D plane, then it is also considered as an intersection and returns true.

type Face ¶

type Face interface {
	Normal() math.Vector
	AABB() AABB
	Vertices(func(v *Vertex) bool)
	Triangles(func(t *Triangle) bool)
}

type Halfedge ¶

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

Halfedge holds a halfedge representation.

func (*Halfedge) Cotan ¶

func (he *Halfedge) Cotan() float64

func (*Halfedge) DihedralAngle ¶

func (he *Halfedge) DihedralAngle() float64

func (*Halfedge) Vec ¶

func (he *Halfedge) Vec() math.Vector

type Polygon ¶

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

Polygon is a polygon that contains multiple vertices.

func NewPolygon ¶

func NewPolygon(vs ...*Vertex) (*Polygon, error)

func (*Polygon) AABB ¶

func (p *Polygon) AABB() AABB

func (*Polygon) Normal ¶

func (p *Polygon) Normal() math.Vector

func (*Polygon) Triangles ¶

func (p *Polygon) Triangles(iter func(t *Triangle) bool)

func (*Polygon) Vertices ¶

func (p *Polygon) Vertices(iter func(v *Vertex) bool)

type Quad ¶

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

Quad is a quadrilateral that contains four vertices

func NewQuad ¶

func NewQuad(v1, v2, v3, v4 *Vertex) *Quad

func (*Quad) AABB ¶

func (q *Quad) AABB() AABB

func (*Quad) Normal ¶

func (q *Quad) Normal() math.Vector

func (*Quad) Triangles ¶

func (q *Quad) Triangles(f func(*Triangle) bool)

func (*Quad) Vertices ¶

func (q *Quad) Vertices(f func(v *Vertex) bool)

type Triangle ¶

type Triangle struct {
	V1, V2, V3 Vertex
	// contains filtered or unexported fields
}

Triangle is a triangle that contains three vertices.

func NewTriangle ¶

func NewTriangle(v1, v2, v3 *Vertex) *Triangle

func (*Triangle) AABB ¶

func (t *Triangle) AABB() AABB

func (*Triangle) Normal ¶

func (t *Triangle) Normal() math.Vector

func (*Triangle) Triangles ¶

func (t *Triangle) Triangles(f func(*Triangle) bool)

func (*Triangle) Vertices ¶

func (t *Triangle) Vertices(f func(v *Vertex) bool)

type Vertex ¶

type Vertex struct {
	Pos math.Vector
	UV  math.Vector
	Nor math.Vector
	Col color.RGBA
}

Vertex is a vertex that contains the necessary information for describing a mesh.

func NewRandomVertex ¶

func NewRandomVertex() *Vertex

func (*Vertex) AABB ¶

func (v *Vertex) AABB() AABB

Source Files ¶

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