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MapRange Macro
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| // Maps one ascending range onto another | |
| // Example: map a range like [-50, 100] to [0, 1.0] | |
| #define MAPRANGE(x, inputLow, inputHigh, outputLow, outputHigh) ({\ | |
| __typeof(x) __x = (x); \ | |
| __typeof(inputLow) __inputLow = (inputLow); \ | |
| __typeof(inputHigh) __inputHigh = (inputHigh); \ | |
| __typeof(outputLow) __outputLow = (outputLow); \ | |
| __typeof(outputHigh) __outputHigh = (outputHigh); \ | |
| (((__x - __inputLow) / (__inputHigh - __inputLow)) * (__outputHigh - __outputLow)) + __outputLow; \ | |
| }) |
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