In my project I have a very simple assignment.
Vector3 v1 = new Vector3(0,0,0);
Vector3 v2 = v1;
v2.x = 10;
Debug.Log(v1);
The above code prints "0,0,0". If this was Java it would print "10,0,0" because v2 would reference v1. How do I get this in C#?
I want v1 and v2 to point to the same object. This is also part of a unity project but I don't think that's relevant here?
In Unity3d, Vector3 is not a reference type (class). It's a value type (struct). Which means it behaves in this sense more like a primitive would in Java.
When you assign, you're copying, not referencing the same object.
What you can do is call a method using the ref keyword, and allow that to modify an existing Vector3:
private static void Vector3Test()
{
Vector3 v1 = new Vector3(0, 0, 0);
ChangeVector(ref v1);
Debug.Log(v1);
}
private static void ChangeVector(ref Vector3 vector)
{
vector.x = 10;
}
This will output "10,0,0" as expected.
This is because Vector3 is Structure type not Class type. It's a value type, not a reference type, like Class. So when you assign it, it will copy a new value, but their address in memory is not same.
