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SwitchSlide
by WompaStompa
|
| Version | 0.1.1 |
| Zip size | 148 KiB |
| License | n/a |
| Updated | 24/11/2021 |
| Downloads | 364 |
| MD5 | e2402742c931926f4305b084e5263818 |
App Details
Just a very basic edit of switchbrew's simplegfx example and touch-screen example.
How to use a slide rule. (https://www.sliderulemuseum.com/SR_Class/OS-ISRM_SlideRuleSeminar.pdf)
Issues:
Slowly sliding your finger horizontally across the screen is kinda jittery and makes lining up your calculation a bit of a pain. To counter this, slide at a normal speed and a steep vertical angle. The vertical component of the slide will effectively just get ignored but the small horizontal component will always be accounted for.
The scales won't line up perfectly when slid relative to one another because I only lined up the gradations with the nearest pixel. So for example, the 3.4 line would go at x position 1280*log₁₀(3.4) = 680.293, so I just put it at x coordinate 680. They should all be close enough to the true value that the power of estimation will give you accurate enough results.
Take advantage of the power of iteration to get increasingly accurate results. For example, say you wanted to know 590÷101.
1. Estimate what the answer should be. 590 is about 600 and 101 is about 100, so 590÷101 should be about 6.
2. Use the slide rule to get an answer of about 5.84.
3. 5.84×101 = 589.84. This means our error is (590-589.84)÷101 = 0.16÷101.
4. Use the slide rule to evaluate 0.16÷101 to be about 0.001584.
5. Add the error correction to our first calculation to get 590÷101 = 5.841584.
6. 5.841584×101 = 589.999984. If this still isn't accurate enough for what you're doing, iterate again. In this case though, you could just notice that the next iteration would be a power of 10 times a previous iteration, meaning you've already found the repeating decimal expansion.
The scales from top to bottom are:
- Double Logarithmic (1 to 10 to 100)
- Folded Single Logarithmic with index at Pi (π to 10, 10 = 1, 1 to π)
- Blue line denoting boundary between slide and top stator
- Folded Single Logarithmic with index at Pi (π to 10, 10 = 1, 1 to π)
- Red Inverse Single Logarithmic (10 to 1)
- Single Logarithmic (1 to 10)
- Blue line denoting boundary between slide and botom stator
- Single Logarithmic (1 to 10)
- Linear (0 to 1)
Fuck OpenGL and gpu compute, software render is all I need.
Changelog
n/a
