feat: added template for vec so further demensions will be easier to

implement

polygon.hpp

@@ -2,7 +2,6 @@
 #define POLYGON_H
 
 #include "fastmath.hpp"
-
 struct polygon {
 
     const vec3 points[3];
@@ -15,7 +14,7 @@ struct polygon {
             int n = (i + 1) % 3;
 
             vec3 d = points[n] - points[i];
-            d = vec3(d.y, -d.x, d.z);
+            d = vec3(d.y(), -d.x(), d.z());
 
             vec3 s = p - points[n];