Scrolling up on the Newton's fractal interactive app zooms in all the way

[Darylgolden]

Describe the bug
On the interactive here, scrolling up zooms the view all the way in, rather than zooming in slowly.

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
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Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
Add any other context about the problem here.

[warmist]

Same. Win7 Browser: Firefox version: 92.0

[vincerubinetti]

Sounds like you're just saying the zoom sensitivity is just too high. Are you pinch-zooming or dragging up/down?

Unfortunately this is a difficult problem to "solve", in the sense of making it feel right and consistent across all devices. For example, MacBooks can trigger a very different scroll amount (the only number we really have access to as a website developer) when you use mouse wheel vs. trackpad pinch zoom vs. trackpad two-finger-scroll. We could try to detect exactly which device and zoom type is happening, but that is brittle/error-prone and still has holes.

That said, the hard-coded zoom sensitivity there now could probably stand to be lowered, knowing that it will make zoom speed feel better on these users' devices and also probably make it feel too slow on other devices/cases.