Method setPersistence

src/fl/fx/2d/flowfield.h:237–237

Parameter setters.

    // Parameter setters.
    void setPersistence(float halfLife) { mParams.persistence = halfLife; }
    void setColorShift(float speed) { mParams.color_shift = speed; }
    void setFlowAmplitudeX(float amp) { mParams.flow_amp_x = amp; }
    void setFlowAmplitudeY(float amp) { mParams.flow_amp_y = amp; }