lygia/animation/easing/quadraticInOut)quadrtic in/out easing. From https://github.com/stackgl/glsl-easings
Use:
quadraticInOut(<float> x)
#ifndef FNC_QUADRATICINOUT
#define FNC_QUADRATICINOUT
float quadraticInOut(in float t) {
float p = 2.0 * t * t;
return t < 0.5 ? p : -p + (4.0 * t) - 1.0;
}
#endif
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