Zig Zag, Bounce, Oscillate

pingPong.c

float zigzag(float t) {
    float a = t * 0.5;
    float b = a - floor(a);
    return 1.0 - abs(b + b - 1.0);
}

float oscillate(float t) {
    return 0.5 + 0.5 * sin(M_PI * (t - 0.5));
}

float bounce(float t) {
    return abs(sin(M_PI_2 * t));
}

shader pingPongScalar(
    float A = 0.0,
    float B = 1.0,
    float T = 0.5,
    
    output float ZigZag = 0.5,
    output float Oscillate = 0.5,
    output float Bounce = 0.5) {
    
    ZigZag = mix(A, B, zigzag(T));
    Oscillate = mix(A, B, oscillate(T));
    Bounce = mix(A, B, bounce(T));
}