spread_radius() [1/2]

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

inlinenoexcept

Bounding radius of a window around its centroid.

Parameters

history	Buffer of positions, capacity >= window
window	Number of samples, minimum 1

Returns

Maximum distance from centroid to any sample in the window

A cheap containment/extent measure: how large a circle a gesture currently occupies, independent of how much path length it traced to get there. A tight scribble and a single large slow circle can have similar path_length but very different spread.

Definition at line 539 of file Differential.hpp.

{
    const glm::vec2 c = centroid(history, window);
    float max_dist = 0.0F;
    for (size_t i = 0; i < window; ++i)
        max_dist = std::max(max_dist, glm::length(history[i] - c));
    return max_dist;
}

References centroid().

Referenced by spread_radius().

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