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Update core:math/rand to use context.random_generator and remove rand.Rand

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gingerBill
2024-06-15 15:33:24 +01:00
parent 318d5e4a7e
commit 7ec17ecf98
8 changed files with 197 additions and 387 deletions
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core/math/rand/normal.odin
+5 -5
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@@ -18,7 +18,7 @@ import "core:math"
// https://www.jstatsoft.org/article/view/v005i08 [web page]
//
@(require_results)
norm_float64 :: proc(r: ^Rand = nil) -> f64 {
norm_float64 :: proc() -> f64 {
rn :: 3.442619855899
@(static, rodata)
@@ -116,7 +116,7 @@ norm_float64 :: proc(r: ^Rand = nil) -> f64 {
}
for {
j := i32(uint32(r))
j := i32(uint32())
i := j & 0x7f
x := f64(j) * f64(wn[i])
if u32(abs(j)) < kn[i] {
@@ -126,15 +126,15 @@ norm_float64 :: proc(r: ^Rand = nil) -> f64 {
if i == 0 {
for {
x = -math.ln(float64(r)) * (1.0/ rn)
y := -math.ln(float64(r))
x = -math.ln(float64()) * (1.0/ rn)
y := -math.ln(float64())
if y+y >= x*x {
break
}
}
return j > 0 ? rn + x : -rn - x
}
if fn[i]+f32(float64(r))*(fn[i-1]-fn[i]) < f32(math.exp(-0.5*x*x)) {
if fn[i]+f32(float64())*(fn[i-1]-fn[i]) < f32(math.exp(-0.5*x*x)) {
return x
}
}