G2DCoordinateSystemGetNormalizedDirection(Logical3D, Logical3D, Double, Double, PointD2D) Method

Converts logical coordinates along an isoline to layer coordinates and returns the direction of the isoline at this point.

Namespace: Altaxo.Graph.Gdi
Assembly: AltaxoBase (in AltaxoBase.dll) Version: 4.8.3179.0 (4.8.3179.0)

Syntax

public PointD2D GetNormalizedDirection(
	Logical3D r0,
	Logical3D r1,
	double t,
	double angle,
	out PointD2D normalizeddirection
)

r0 Logical3D: Logical coordinates of starting point of the isoline.
r1 Logical3D: Logical coordinates of end point of the isoline.
t Double: Parameter between 0 and 1 that determines the point on the isoline. A value of 0 denotes the starting point of the isoline, a value of 1 the end point. The logical coordinates are linear interpolated between starting point and end point.
angle Double: Angle between direction of the isoline and returned normalized direction vector.
normalizeddirection PointD2D: Returns the normalized direction vector,i.e. a vector of norm 1, that has the angle angle to the tangent of the isoline.

PointD2D
The location (in layer coordinates) of the isoline point.