Namespaces

Path2dCalcCache /

#include “cinder/Path2d.h”

Accelerates the calculation of various operations on Path2d . Useful if doing repeated calculations, otherwise just use Path2d member functions.

Public Member Functions

Path2dCalcCache (const Path2d &path)
const Path2d &

getPath2d () const
float

getLength () const
float

calcNormalizedTime (float relativeTime, bool wrap=false, float tolerance=1.0e-03f, int maxIterations=16) const

Calculates the t-value corresponding to relativeTime in the range [0,1) within epsilon of tolerance . For example, relativeTime of 0.5f returns the t-value corresponding to half the length. maxIterations dictates the number of refinement loop iterations allowed, setting an upper bound for worst-case performance.
float

calcTimeForDistance (float distance, bool wrap=false, float tolerance=1.0e-03f, int maxIterations=16) const

Calculates a t-value corresponding to arc length distance . If wrap then the t-value loops inside the 0-1 range as distance exceeds the arc length.
vec2

getPosition (float t) const

Returns the point on the curve at parameter t , which lies in the range [0,1]