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rand param

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This commit is contained in:
Ryan Oldenburg 2020-11-29 18:58:47 -06:00
parent dfa3e2199f
commit 80a2b4dade
1 changed files with 6 additions and 6 deletions
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src/vmath.nim
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@ -167,9 +167,9 @@ proc `[]=`*(a: var Vec2, i: int, b: float32) =
else: else:
a.y = b a.y = b
proc randVec2*(): Vec2 = proc randVec2*(r: var Rand): Vec2 =
let a = rand(PI * 2) let a = r.rand(PI * 2)
let v = rand(1.0) let v = r.rand(1.0)
vec2(cos(a) * v, sin(a) * v) vec2(cos(a) * v, sin(a) * v)
proc `$`*(a: Vec2): string = proc `$`*(a: Vec2): string =
@ -368,12 +368,12 @@ proc almostEquals*(a, b: Vec3, precision = 1e-6): bool =
let c = a - b let c = a - b
abs(c.x) < precision and abs(c.y) < precision and abs(c.z) < precision abs(c.x) < precision and abs(c.y) < precision and abs(c.z) < precision
proc randVec3*(): Vec3 = proc randVec3*(r: var Rand): Vec3 =
## Generates a random unit vector based on ## Generates a random unit vector based on
## http://mathworld.wolfram.com/SpherePointPicking.html ## http://mathworld.wolfram.com/SpherePointPicking.html
let let
u = rand(0.0 .. 1.0) u = r.rand(0.0 .. 1.0)
v = rand(0.0 .. 1.0) v = r.rand(0.0 .. 1.0)
th = 2 * PI * u th = 2 * PI * u
ph = arccos(2 * v - 1) ph = arccos(2 * v - 1)
vec3( vec3(