Added fract as vec, pos, size operation.

src/typed-geometry/functions/math.hh

@@ -106,6 +106,11 @@ TG_IMPL_DEFINE_COMPWISE_FUNC_UNARY(pos, iceil);
 TG_IMPL_DEFINE_COMPWISE_FUNC_UNARY(vec, iceil);
 TG_IMPL_DEFINE_COMPWISE_FUNC_UNARY(size, iceil);
 
+// fract
+TG_IMPL_DEFINE_COMPWISE_FUNC_UNARY(pos, fract);
+TG_IMPL_DEFINE_COMPWISE_FUNC_UNARY(vec, fract);
+TG_IMPL_DEFINE_COMPWISE_FUNC_UNARY(size, fract);
+
 // clamp
 TG_IMPL_DEFINE_COMPWISE_FUNC_TERNARY(pos, clamp);
 TG_IMPL_DEFINE_COMPWISE_FUNC_TERNARY(vec, clamp);