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min, max, abs

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This commit is contained in:
Ginger Bill
2016-09-02 14:14:12 +01:00
parent fa09d805e2
commit 25e9b9bc87
11 changed files with 335 additions and 55 deletions
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examples/math.odin
+3 -10
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@@ -29,17 +29,10 @@ fsqrt :: proc(x: f32) -> f32 #foreign "llvm.sqrt.f32"
fsin :: proc(x: f32) -> f32 #foreign "llvm.sin.f32"
fcos :: proc(x: f32) -> f32 #foreign "llvm.cos.f32"
flerp :: proc(a, b, t: f32) -> f32 { return a*(1-t) + b*t }
fclamp :: proc(x, lower, upper: f32) -> f32 { return fmin(fmax(x, lower), upper) }
fclamp :: proc(x, lower, upper: f32) -> f32 { return min(max(x, lower), upper) }
fclamp01 :: proc(x: f32) -> f32 { return fclamp(x, 0, 1) }
fabs :: proc(x: f32) -> f32 { if x < 0 { x = -x } return x }
fsign :: proc(x: f32) -> f32 { if x >= 0 { return +1 } return -1 }
fmin :: proc(a, b: f32) -> f32 { if a < b { return a } return b }
fmax :: proc(a, b: f32) -> f32 { if a > b { return a } return b }
fmin3 :: proc(a, b, c: f32) -> f32 { return fmin(fmin(a, b), c) }
fmax3 :: proc(a, b, c: f32) -> f32 { return fmax(fmax(a, b), c) }
copy_sign :: proc(x, y: f32) -> f32 {
ix := x transmute u32
iy := y transmute u32
@@ -76,8 +69,8 @@ remainder :: proc(x, y: f32) -> f32 {
}
fmod :: proc(x, y: f32) -> f32 {
y = fabs(y)
result := remainder(fabs(x), y)
y = abs(y)
result := remainder(abs(x), y)
if fsign(result) < 0 {
result += y
}