public void Update(TimeSpan elapsedTime)
{
Vector2 delta = GetMouseDelta();
Vector2 deltaDampened = delta * 0.0005f;
CenterCursor();
this.MouseDelta = delta;
// Should perhaps extract the yaw and pitch from the current direction of the camera
_cameraYaw += deltaDampened.X;
_cameraPitch += deltaDampened.Y;
//
Vector3 forward = Mathematics.DirectionFromViewMatrix(Matrix.Invert(this.View));
Vector3 position = Mathematics.DecomposeToPosition(Matrix.Invert(this.View));
Matrix cameraRotation = Matrix.RotationYawPitchRoll(_cameraYaw, _cameraPitch, 0);
Vector3 newForward = Vector3.TransformNormal(Vector3.UnitZ, cameraRotation);
double elapsed = elapsedTime.TotalSeconds; // Elapsed time since last frame in seconds
double speedMultiplier = (_engine.Keyboard.IsKeyDown(Key.LeftShift) ? 2 : 1);
double speed = 40.0 * speedMultiplier; // 40 distance units per second
float distance = (float)(speed * elapsed); // d = vt
// The amount of movement * the direction of movement, then rotate that along the direction we are looking
Vector3 translateDirection = Vector3.Zero;
if (_engine.Keyboard.IsKeyDown(Key.W)) // Forwards
{
translateDirection += Vector3.TransformNormal(Vector3.UnitZ, cameraRotation);
}
if (_engine.Keyboard.IsKeyDown(Key.S)) // Backwards
{
translateDirection += Vector3.TransformNormal(-Vector3.UnitZ, cameraRotation);
}
if (_engine.Keyboard.IsKeyDown(Key.A)) // Left
{
translateDirection += Vector3.TransformNormal(-Vector3.UnitX, cameraRotation);
}
if (_engine.Keyboard.IsKeyDown(Key.D)) // Right
{
translateDirection += Vector3.TransformNormal(Vector3.UnitX, cameraRotation);
}
Vector3 newPosition = position;
if (translateDirection.LengthSquared() > 0)
{
newPosition += Vector3.Normalize(translateDirection) * distance;
}
this.View = Matrix.LookAtLH(newPosition, newPosition + newForward, Vector3.UnitY);
}