Sine Wave

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theory

Algorithm to take our sine wave from one side of the Scratch screen to the other, on repeat:

forever:
    let Θ = (angle)
    y = (amplitude) × sin Θ, for:
        -(screen_width)° ≤ Θ ≤ (screen_width)°
    if angle > screen_width, let Θ = -(screen_width)

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implementation

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implementation v2

with alternating speeds, start positions and amplitudes:

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questions

1. Variable effects
Explain what happens if you increase or decrease the initial variables:

1. screen_width
2. amplitude
3. speed
4. angle

2. Gamify
Use this sine wave as patrol code for an emeny in a game of your choosing.