Question

So I’ve been trying to get this to work but no luck so far, hopefully you can help. The thing is I have a camera in my project that the user can freely move with mouse and buttons.
Currently like so:
move = new Vector3(0, 0, -1) * moveSpeed;
move = new Vector3(0, 0, 1) * moveSpeed;
...

And then I just add move vector to cameraPos vector: cameraPos += move

Then problem is if I rotate the camera and then try to move, for example down, it will not move straight down but in a certain angle. I am assuming this is due to moving on local axis. But what I want to do is to move on a world axis. Is something like that possible, or do I have to somehow calculate the angle and then move on more than one axis?

Best regards!

EDIT:
I am rotating the camera where cameraPos is the current position of the camera and rotation is the current rotation of the camera. And this is the code to rotate the camera:

void Update()
{
    ...
    if(pressed)
    {
        int newY = currentY - oldY;
        pitch -= rotSpeed * newY;
    }
    Rotate();
}

void Rotate()
{
    rotation = Matrix.CreateRotationX(pitch);
    Vector3 transformedReference = Vector3.Transform(cameraPos, rotation);
    Vector3 lookAt = cameraPos + transformedReference;
    view = Matrix.CreateLookAt(cameraPos, lookAt, Vector3.Up);

    oldY = currentY;
}

Ihope this is more readable.

Answer 1

I was able to solve this problem by using:

Vector3 v;
if (state.IsKeyDown(Keys.Up))
   v = new Vector3(0, 0, 1) * moveSpeed;
... //Other code for moving down,left,right

if (state.IsKeyDown(Keys.V))
    view *= Matrix.CreateRotationX(MathHelper.ToRadians(-5f) * rotSpeed); //Multiplying view Matrix to create rotation

view *= Matrix.CreateTranslation(v); //Multiplying view Matrix to create movement by Vector3 v