BLI_rand: add BLI_rng_get_float_unit_v2

2014-06-14 18:12:19 +10:00
parent b54793ef02
commit 8d96ea8322
2 changed files with 8 additions and 0 deletions
--- a/source/blender/blenlib/intern/rand.c
+++ b/source/blender/blenlib/intern/rand.c
@@ -117,6 +117,13 @@ float BLI_rng_get_float(RNG *rng)
 	return (float) BLI_rng_get_int(rng) / 0x80000000;
 }

+void BLI_rng_get_float_unit_v2(RNG *rng, float v[2])
+{
+	float a = (float)(M_PI * 2.0) * BLI_rng_get_float(rng);
+	v[0] = cosf(a);
+	v[1] = sinf(a);
+}
+
 void BLI_rng_get_float_unit_v3(RNG *rng, float v[3])
 {
 	float r;