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LerpPoints

Header:	FIL.h
Namespace:	fil

Linearly interpolates between two points.

Syntax

void fil::LerpPoints
(
	const fil::Point2D& inPoint0,
	const fil::Point2D& inPoint1,
	const float inLambda,
	fil::Point2D& outPoint
)

Parameters

Name	Type	Range	Default	Description
inPoint0	const Point2D&
inPoint1	const Point2D&
inLambda	const float	- -	0.5f	Interpolation between the input points where 0.0 value is equal to inPoint0 and 1.0 to inPoint1
outPoint	Point2D&

Examples

LerpPoints performed on red inPoint0 and blue inPoint1 with inLambda = 0,25. Green is the resulting outPoint.

LerpPoints performed on red inPoint0 and blue inPoint1 with inLambda = -1,0. Green is the resulting outPoint.

Remarks

Please note that:

interpolation begins at inPoint0,
for positive inLambda values interpolation is performed in the direction of inPoint1 while for negative - in the direction of a point which is the result of the following operation: (inPoint0 - inPoint1), in example a point acquired by mirroring inPoint1 by inPoint0.

Hence when inLambda = 0,0, outPoint is equal to inPoint0, while for inLambda = 1,0 it's the same as inPoint1 and for inLambda = -1,0 - as (inPoint0 - inPoint1). Other inLambda values interpolate between the input points and beyond.