Editor matrix, icons, rotation, impl light

src/engine/CoreMath.h

@@ -34,6 +34,7 @@ struct FVector {
         return x * other.x + y * other.y + z * other.z;
     }
 
+
     FVector Cross(const FVector& other) const {
         return FVector(
             y * other.z - z * other.y,
@@ -42,6 +43,10 @@ struct FVector {
         );
     }
 
+    float Magnitude() const {
+        return std::sqrt(x * x + y * y + z * z);
+    }
+
     FVector Normalize() const {
         float len = std::sqrt(x * x + y * y + z * z);
         return FVector(