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added floats.interpolate(), math.interpolate(), and LERP example

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Irmen de Jong
2024-11-24 08:51:34 +01:00
parent 90f1e7fd6a
commit 857d2eefca
8 changed files with 267 additions and 4 deletions
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8
compiler/res/prog8lib/math.p8
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@@ -662,4 +662,12 @@ log2_tab
cx16.r0++
return v0 + cx16.r0
}
sub interpolate(ubyte v, ubyte inputMin, ubyte inputMax, ubyte outputMin, ubyte outputMax) -> ubyte {
; Interpolate a value v in interval [inputMin, inputMax] to output interval [outputMin, outputMax]
; There is no version for words because of lack of precision in the fixed point calculation there.
cx16.r0 = ((v-inputMin)*256+inputMax) / (inputMax-inputMin)
cx16.r0 *= (outputMax-outputMin)
return cx16.r0H + outputMin
}
}