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prevent math.ln(0)

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mfranz 2007-02-10 20:42:36 +00:00
parent 892f665997
commit 7f30f1599e
1 changed files with 2 additions and 2 deletions
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Nasal/dynamic_view.nas
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@ -7,8 +7,8 @@ var sin = func(a) { math.sin(a * math.pi / 180.0) }
var cos = func(a) { math.cos(a * math.pi / 180.0) }
var sigmoid = func(x) { 1 / (1 + math.exp(-x)) }
var nsigmoid = func(x) { 2 / (1 + math.exp(-x)) - 1 }
var pow = func(v, w) { math.exp(math.ln(v) * w) }
var npow = func(v, w) { math.exp(math.ln(abs(v)) * w) * (v < 0 ? -1 : 1) }
var pow = func(v, w) { v < 0 ? nil : v == 0 ? 0 : math.exp(math.ln(v) * w) }
var npow = func(v, w) { v == 0 ? 0 : math.exp(math.ln(abs(v)) * w) * (v < 0 ? -1 : 1) }
var clamp = func(v, min, max) { v < min ? min : v > max ? max : v }
var normatan = func(x) { math.atan2(x, 1) * 2 / math.pi }