straightness() [1/2]

float MayaFlux::Kinesis::straightness ( const Memory::HistoryBuffer< glm::vec2 > &  history, size_t  window  )

inlinenoexcept

Straightness of a path over a window, 1.0 is a straight line.

Parameters

history	Buffer of positions, capacity >= window
window	Number of samples, minimum 2

Returns

net_displacement / path_length, or 0 when path_length is below 1e-6 to avoid dividing by a stationary point

A gesture that doubles back on itself drives this toward 0 even though individual segment speeds may be high; a gesture that moves directly toward one point holds this near 1.0 regardless of speed.

Definition at line 485 of file Differential.hpp.

{
    const float len = path_length(history, window);
    if (len < 1e-6F)
        return 0.0F;
    return net_displacement(history, window) / len;
}

References net_displacement(), and path_length().

Referenced by straightness().

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