# Differences

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 developer:sdksamples:arclengthpoint [2015/09/14]127.0.0.1 external edit developer:sdksamples:arclengthpoint [2016/01/11] (current)sandy 2016/01/11 sandy 2015/09/14 external edit 2016/01/11 sandy 2015/09/14 external edit Line 7: Line 7: =====Answer===== =====Answer===== - The two function ​on ON_Curve that are useful for determining the parameter of the point on a curve that is a prescribed arc length distance from the start of a curve are: + The two functions ​on ON_Curve that are useful for determining the parameter of the point on a curve that is a prescribed arc length distance from the start of a curve are: * ON_Curve::​GetNormalizedArcLengthPoint * ON_Curve::​GetNormalizedArcLengthPoint * ON_Curve::​GetNormalizedArcLengthPoints * ON_Curve::​GetNormalizedArcLengthPoints - To use these functions, ​you need to calculate a normalized arc length parameter. That is, a parameter on the curve where 0.0 = the start of the curve, 0.5 = the midpoint of the curve, and 1.0 = the end of the curve. + To use these functions, calculate a normalized arc length parameter. That is, a parameter on the curve where 0.0 = the start of the curve, 0.5 = the midpoint of the curve, and 1.0 = the end of the curve. - Note, if you want to determine the parameter of the point on a curve that is a prescribed arc length distance from the end of a curve, just reverse the curve before calling one of the above curve members. + Note, to determine the parameter of the point on a curve that is a prescribed arc length distance from the end of a curve, just reverse the curve before calling one of the above curve members. The following code sample demonstrates how to use these functions. The following code sample demonstrates how to use these functions.