make normalize safe

normalizing a zero vector returns the zero vector, not a nan
treeform · Sep 22, 2023 · 1e3668d · 1e3668d
1 parent 7282ae1
commit 1e3668d
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/vmath.nim b/src/vmath.nim
@@ -789,7 +789,8 @@ proc lengthSq*[T](a: GVec4[T]): T =
   a.x*a.x + a.y*a.y + a.z*a.z + a.w*a.w
 
 proc normalize*[T](a: GVec234[T]): type(a) =
-  a / a.length
+  if (a.length == 0): a 
+  else: a / a.length
 
 proc mix*[T: SomeFloat](a, b: GVec234[T], v: T): type(a) =
   a * (1.0 - v) + b * v