Demo3D 2026 API Documentation
Demo3D Namespaces
Demo3D.Common Namespaces
Demo3D.Common
Util Class
Util Methods
Acosh Method
AngleBetweenLineAndPlane Method
AngleBetweenMatrices Method
AngleBetweenUnitVectors Method
AngleBetweenVectors Method
Asinh Method
Atanh Method
BinomialCoefficient Method
BoundedDistanceTo Method
BoundedSnapTo Method
CalculateLineLineIntersection Method
CalculateSurfaceNormal Method
ChangeCoordinateSystem Method
Clamp<T> Method
ComposeAngles Method
ComposeAnglesDegrees Method
CosDegrees Method
CosRadians Method
Decompose Method
DecomposeAngles Method
DecomposeRotation Method
DecomposeRotationByRef Method
Degrees Method
Distance Method
DistanceAlong Method
DistanceSq Method
DistanceTo Method
DistanceToPlane Method
Duration Method
Enumerate<T> Method
EQ Method
EscapePath Method
Format Method
GE Method
GetAlignMatrix Method
GT Method
IgnoreNaN Method
IncreaseMagnitude Method
IntersectCircleCircle Method
IntersectCirclePlane Method
IntersectCircleSphere Method
IntersectCircleYSphere Method
IntersectLineLine Method
IntersectLinePlane Method
IntersectLineSphere Method
IntersectPlaneSphere Method
IntersectRayPlane Method
IntersectRaySphere Method
IntersectRayTriangle Method
IsEmailAddressSyntaxValid Method
IsInfinity Method
IsNaN Method
IsUnitVector Method
LE Method
LineLineNearestPoints Method
LT Method
Max<T> Method
MaxIndex<T> Method
MidPoint Method
Min<T> Method
MinIndex Method
MinNonNegative Method
Multiply Method
NE Method
NearestPowerOf2 Method
NormaliseWrapAroundRange Method
Normalize Method
Normalize02PI Method
NormalizeMinusPiToPlusPi Method
Orthonormalize Method
ParallelComponent Method
ParseVector3 Method
PerpendicularComponent Method
PointBetween Method
Project Method
ProjectedLength Method
ProjectPointToLine Method
ProjectPointToPlane Method
QuaternionToPitchYawRoll Method
Radians Method
ResizeImageWithCrop Method
RotationAngle Method
RotationToAlign Method
SideOfPlane Method
SignedAngleBetweenUnitVectors Method
SinDegrees Method
SinRadians Method
SnapLowerTo Method
SnapLowerToZero Method
SnapTo Method
SnapToZero Method
SnapUpperTo Method
SnapUpperToZero Method
SphereIntersectsFrustum Method
SphereIntersectSphere Method
Swap<T> Method
TanDegrees Method
TanRadians Method
TimeOfIntersection Method
TimeOfSeparation Method
TimeToTravel Method
TriangleIntersectsPlane Method
TriangleIntersectsTriangle Method
TrianglePlaneIntersection Method
UnescapePath Method
VectorToInverseRotation Method
VectorToInverseRotationLeft Method
VectorToInverseRotationRight Method
VectorToInverseRotationUp Method
VectorToRotation Method
VectorToRotationLeft Method
VectorToRotationRight Method
VectorToRotationUp Method
ZeroNaN Method
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UtilRotationAngle Method

Determines the (unsigned) rotation angle for the upper 3x3 rotation part of the specified matrix.

Namespace: Demo3D.Common
Assembly: Demo3D.Common (in Demo3D.Common.dll) Version: 19.01.00
Syntax
C#
Copy
public static double RotationAngle(
	Matrix m
)

Parameters

m  Matrix
The matrix.

Return Value

Double
The (unsigned) rotation angle, in the interval [0, PI].
Remarks
This returns the shortest angle of rotation required in order to align the indentity rotation with the upper 3x3 rotation part of the specified matrix. The redturned angle is guaranteed to be in the interval [0, PI].
See Also