Struct MeshTransform

Namespace

RvtIO.Meshes

Assembly

RvtIO.dll

A transform from the frame of a family to the coordinates of the document: a point p maps to Origin + BasisX * p.X + BasisY * p.Y + BasisZ * p.Z. The basis vectors are the images of the family axes. A negative RvtIO.Meshes.MeshTransform.Determinant is a mirror image: a renderer that culls back faces reverses the winding of the symbol's triangles for it.

public readonly record struct MeshTransform : IEquatable<MeshTransform>

Implements

IEquatable<MeshTransform>

Inherited Members

object.Equals(object?)

object.Equals(object?, object?)

object.GetHashCode()

object.GetType()

object.ReferenceEquals(object?, object?)

object.ToString()

Remarks

A RvtIO.Model.GeoInstance.Transform t holds the 3x3 matrix row by row and then the translation, so the basis vectors are its columns: BasisX = (t[0], t[3], t[6]), BasisY = (t[1], t[4], t[7]), BasisZ = (t[2], t[5], t[8]) and Origin = (t[9], t[10], t[11]) (see RvtIO.Meshes.MeshTransform.FromRowMajor(System.Collections.Generic.IReadOnlyList{System.Double})).

Constructors

MeshTransform(MeshVector, MeshVector, MeshVector, MeshVector)

A transform from the frame of a family to the coordinates of the document: a point p maps to Origin + BasisX * p.X + BasisY * p.Y + BasisZ * p.Z. The basis vectors are the images of the family axes. A negative RvtIO.Meshes.MeshTransform.Determinant is a mirror image: a renderer that culls back faces reverses the winding of the symbol's triangles for it.

public MeshTransform(MeshVector Origin, MeshVector BasisX, MeshVector BasisY, MeshVector BasisZ)

Parameters

Origin MeshVector

The image of the family origin, in feet: (t[9], t[10], t[11]).

BasisX MeshVector

The image of the family X axis: the column (t[0], t[3], t[6]).

BasisY MeshVector

The image of the family Y axis: the column (t[1], t[4], t[7]).

BasisZ MeshVector

The image of the family Z axis: the column (t[2], t[5], t[8]).

Remarks

A RvtIO.Model.GeoInstance.Transform t holds the 3x3 matrix row by row and then the translation, so the basis vectors are its columns: BasisX = (t[0], t[3], t[6]), BasisY = (t[1], t[4], t[7]), BasisZ = (t[2], t[5], t[8]) and Origin = (t[9], t[10], t[11]) (see RvtIO.Meshes.MeshTransform.FromRowMajor(System.Collections.Generic.IReadOnlyList{System.Double})).

Properties

BasisX

The image of the family X axis: the column (t[0], t[3], t[6]).

public MeshVector BasisX { get; init; }

Property Value

MeshVector

BasisY

The image of the family Y axis: the column (t[1], t[4], t[7]).

public MeshVector BasisY { get; init; }

Property Value

MeshVector

BasisZ

The image of the family Z axis: the column (t[2], t[5], t[8]).

public MeshVector BasisZ { get; init; }

Property Value

MeshVector

Determinant

The determinant of the basis: 1 for a rotation, -1 for a mirror image.

public double Determinant { get; }

Property Value

double

Origin

The image of the family origin, in feet: (t[9], t[10], t[11]).

public MeshVector Origin { get; init; }

Property Value

MeshVector

Methods

Apply(MeshVector)

The image of a point of the family frame.

public MeshVector Apply(MeshVector point)

Parameters

point MeshVector

Returns

MeshVector

FromRowMajor(IReadOnlyList<double>)

The transform of the 12 values of a RvtIO.Model.GeoInstance.Transform.

public static MeshTransform FromRowMajor(IReadOnlyList<double> transform)

Parameters

transform IReadOnlyList<double>

Returns

MeshTransform

Exceptions

ArgumentException

Fewer than 12 values.