meshx

package module
v0.0.0-...-1c10fcc Latest Latest
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 Go to latest Published: Feb 25, 2024 License: MIT Imports: 13 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	PrefixVertex = "v"
	PrefixFace   = "f"
	PrefixGroup  = "g"
)

Variables

View Source 
var (
	ErrInvalidVertex = errors.New("invalid vertex")
	ErrInvalidFace   = errors.New("invalid face")
)
View Source 
var (
	ErrNonManifold = errors.New("non-manifold mesh")
)

Functions

This section is empty.

Types

type AABB 

type AABB struct {
	Center   Vector
	HalfSize Vector
}

Axis aligned bounding box.

func NewAABB 

func NewAABB(center, halfSize Vector) AABB

Construct an AABB from its center and halfsize.

func NewAABBFromBounds 

func NewAABBFromBounds(minBound, maxBound Vector) AABB

Construct an AABB from its min/max bounds.

func NewAABBFromVectors 

func NewAABBFromVectors(vectors []Vector) AABB

Construct an AABB from a slice of vectors.

func (AABB) Buffer 

func (a AABB) Buffer(s float64) AABB

Construct an AABB with a buffer (percentage of the edge length).

func (AABB) GetMaxBound 

func (a AABB) GetMaxBound() Vector

Get the maximum bound.

func (AABB) GetMinBound 

func (a AABB) GetMinBound() Vector

Get the minimum bound.

func (AABB) IntersectsAABB 

func (a AABB) IntersectsAABB(query AABB) bool

Implement the IntersectsAABB interface.

func (AABB) Octant 

func (a AABB) Octant(octant int) AABB

Compute the octant AABB.

type IntersectsAABB 

type IntersectsAABB interface {
	IntersectsAABB(AABB) bool
}

type IntersectsRay 

type IntersectsRay interface {
	IntersectsRay(Ray) bool
}

type IntersectsTriangle 

type IntersectsTriangle interface {
	IntersectsTriangle(Triangle) bool
}

type MeshReader 

type MeshReader interface {
	Read() error
	GetNumberOfVertices() int
	GetNumberOfFaces() int
	GetNumberOfFaceEdges() int
	GetNumberOfPatches() int
	GetVertex(int) Vector
	GetFace(int) []int
	GetFacePatch(int) int
	GetPatch(int) string
}

Generic mesh reader interface.

type MeshWriter 

type MeshWriter interface {
	Write() error
	SetVertices([]Vector)
	SetFaces([][]int)
	SetFacePatches([]int)
	SetPatches([]string)
}

Generic mesh writer interface.

type OBJReader 

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

OBJReader manages parsing an OBJ (WaveFront) file. This supports both ASCII and GZIP ASCII files.

func NewOBJReader 

func NewOBJReader(reader io.Reader) *OBJReader

Construct an OBJ reader from an io.Reader interface.

func ReadOBJFromPath 

func ReadOBJFromPath(path string) (*OBJReader, error)

Read an OBJ file from a file path.

func (*OBJReader) GetFace 

func (r *OBJReader) GetFace(index int) []int

Get a face by index.

func (*OBJReader) GetFacePatch 

func (r *OBJReader) GetFacePatch(index int) int

Get a face patch by index.

func (*OBJReader) GetNumberOfFaceEdges 

func (r *OBJReader) GetNumberOfFaceEdges() int

Get the number of face edges.

func (*OBJReader) GetNumberOfFaces 

func (r *OBJReader) GetNumberOfFaces() int

Get the number of faces.

func (*OBJReader) GetNumberOfPatches 

func (r *OBJReader) GetNumberOfPatches() int

Get the number of patches.

func (*OBJReader) GetNumberOfVertices 

func (r *OBJReader) GetNumberOfVertices() int

Get the number of vertices.

func (*OBJReader) GetPatch 

func (r *OBJReader) GetPatch(index int) string

Get a patch by index.

func (*OBJReader) GetVertex 

func (r *OBJReader) GetVertex(index int) Vector

Get a vertex by index.

func (*OBJReader) Read 

func (r *OBJReader) Read() error

Read the OBJ file.

type OBJWriter 

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

OBJReader manages writing an OBJ (WaveFront) file.

func NewOBJWriter 

func NewOBJWriter(writer io.Writer) *OBJWriter

Construct an OBJWriter from an io.Writer interface.

func (*OBJWriter) SetEdges 

func (w *OBJWriter) SetEdges(edges [][2]int)

Set the edges to write.

func (*OBJWriter) SetFacePatches 

func (w *OBJWriter) SetFacePatches(facePatches []int)

Set the face patches to write.

func (*OBJWriter) SetFaces 

func (w *OBJWriter) SetFaces(faces [][]int)

Set the faces to write.

func (*OBJWriter) SetPatches 

func (w *OBJWriter) SetPatches(patches []string)

Set the patches to write.

func (*OBJWriter) SetVertices 

func (w *OBJWriter) SetVertices(vertices []Vector)

Set the vertices to write.

func (*OBJWriter) Write 

func (w *OBJWriter) Write() error

Write the data to the io.Writer interface.

type Ray 

type Ray struct {
	Origin    Vector
	Direction Vector
}

Ray in three-dimensional Cartesian space.

func NewRay 

func NewRay(origin, direction Vector) Ray

Construct a Ray from its origin and direction.

func (Ray) IntersectsAABB 

func (r Ray) IntersectsAABB(query AABB) bool

Implement the IntersectsAABB interface.

func (Ray) IntersectsTriangle 

func (r Ray) IntersectsTriangle(query Triangle) bool

Implement the IntersectsTriangle interface.

type Triangle 

type Triangle struct {
	P Vector
	Q Vector
	R Vector
}

Triangle in three-dimension Cartesian space.

func NewTriangle 

func NewTriangle(p, q, r Vector) Triangle

Construct a Triangle from its vertices.

func (Triangle) Area 

func (t Triangle) Area() float64

Compute the area.

func (Triangle) IntersectsAABB 

func (t Triangle) IntersectsAABB(query AABB) bool

Implement the IntersectsAABB interface.

func (Triangle) IntersectsRay 

func (t Triangle) IntersectsRay(query Ray) bool

Implement the IntersectsRay interface.

func (Triangle) Normal 

func (t Triangle) Normal() Vector

Compute the normal.

func (Triangle) UnitNormal 

func (t Triangle) UnitNormal() Vector

Compute the unit normal.

type Vector 

type Vector [3]float64

Cartesian vector in three-dimensional space.

func NewVector 

func NewVector(x, y, z float64) Vector

Construct a Vector from its components.

func NewVectorFromArray 

func NewVectorFromArray(values [3]float64) Vector

Construct a Vector from an array.

func (Vector) Abs 

func (v Vector) Abs() Vector

Compute the absolute vector.

func (Vector) Add 

func (v Vector) Add(w Vector) Vector

Add two vectors v + w.

func (Vector) AddScalar 

func (v Vector) AddScalar(s float64) Vector

Add a scalar to a vector.

func (Vector) AngleTo 

func (v Vector) AngleTo(w Vector) float64

Compute the angle (in radians) from v to w.

func (Vector) Cross 

func (v Vector) Cross(w Vector) Vector

Compute the cross product v x w.

func (Vector) Div 

func (v Vector) Div(w Vector) Vector

Divide two vectors element-wise v / w.

func (Vector) DivScalar 

func (v Vector) DivScalar(s float64) Vector

Divide a vector by a scalar.

func (Vector) Dot 

func (v Vector) Dot(w Vector) float64

Compute the dot product v * w.

func (Vector) IntersectsAABB 

func (v Vector) IntersectsAABB(query AABB) bool

Implement the IntersectsAABB interface.

func (Vector) Inv 

func (v Vector) Inv() Vector

Compute the inverse.

func (Vector) Mag 

func (v Vector) Mag() float64

Compute the magnitude (L2-norm).

func (Vector) Mul 

func (v Vector) Mul(w Vector) Vector

Multiply two vectors element-wise v * w.

func (Vector) MulScalar 

func (v Vector) MulScalar(s float64) Vector

Multiply a scalar by a vector.

func (Vector) Sub 

func (v Vector) Sub(w Vector) Vector

Subtract two vectors v - w.

func (Vector) SubScalar 

func (v Vector) SubScalar(s float64) Vector

Subtract a scalar from a vector.

func (Vector) Unit 

func (v Vector) Unit() Vector

Compute the unit.

Source Files

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