Setting cursor to center for mouse->camera movement issues

@Mateo_Loooong wrote:

I've looked up solutions on here for this issue, but they seem to only be bandaids rather than fixes. I control the camera with the mouse by centering the mouse position (viewport.width / 2, viewport.height / 2) and recording the change between frames and multiplying by the delta (elapsedgametime.totalseconds). This can work wonders but when I change between framerates (targetelapsedtime) the camera speeds up when the fps decreases and slows down when fps increases.

To isolate the problem I tested the change between frames with a constant value, and flipped between target framerates and it works perfectly. So centering the mouse position and recording the change between frames seems to be the issue but is there a good solution for this?

// Cache mouse location
                //float deltaX = ScreenManager.Instance.Input.MousePosition.X - (Graphics.GraphicsDevice.Viewport.Width / 2);
                //float deltaY = ScreenManager.Instance.Input.MousePosition.Y - (Graphics.GraphicsDevice.Viewport.Height / 2);
                float deltaX = 4.0f;
                float deltaY = 0.0f;

                mouseRotationBuffer.X -= RotateSpeed.X * deltaX * dt;
                mouseRotationBuffer.Y -= RotateSpeed.Y * deltaY * dt;

                if (mouseRotationBuffer.Y < MathHelper.ToRadians(-verticalMaxes))
                    mouseRotationBuffer.Y = mouseRotationBuffer.Y -
                        (mouseRotationBuffer.Y - MathHelper.ToRadians(-verticalMaxes));
                if (mouseRotationBuffer.Y > MathHelper.ToRadians(verticalMaxes))
                    mouseRotationBuffer.Y = mouseRotationBuffer.Y -
                        (mouseRotationBuffer.Y - MathHelper.ToRadians(verticalMaxes));

                // Make -Mathhelper.Clamp to invert the Pitch rotation
                Rotation = new Vector3(-MathHelper.Clamp(mouseRotationBuffer.Y, MathHelper.ToRadians(-verticalMaxes),
                    MathHelper.ToRadians(verticalMaxes)), MathHelper.WrapAngle(mouseRotationBuffer.X), 0);
            }

            Mouse.SetPosition(Graphics.GraphicsDevice.Viewport.Width / 2, Graphics.GraphicsDevice.Viewport.Height / 2);

Notice the deltaX and deltaY: the constant rate of 4.0f each frame works perfectly when I switch between target framerate, but using the center mouse code is not a consistent speed. Btw dt is my delta time.

this.TargetElapsedTime = TimeSpan.FromSeconds(1d / 250d);

The camera moves slowly with a target fps of 250, but moves very fast with 30fps, for example.

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