// Rotate camera left or right (aka Pan)
public void Yaw(float angle)
{
// rotate around the up vector (normally the y-axis)
viewdir = (viewdir * (float) Math.Cos (angle)) - (right * (float) Math.Sin (angle));
viewdir.Normalize ();
right = viewdir.Cross (up);
right.Normalize ();
}
// Rotate camera up or down (aka Tilt)
public void Pitch(float angle)
{
// rotate around the right vector (normally the x-axis)
viewdir = (viewdir * (float) Math.Cos (angle)) + (up * (float) Math.Sin (angle));
viewdir.Normalize ();
up = viewdir.Cross (right);
up.Normalize ();
}
// Roll the camera left or right
public void Roll(float angle)
{
// rotate around the view-direction vector (normally the z-axis)
right = (right * (float) Math.Cos (angle)) + (up * (float) Math.Sin (angle));
right.Normalize ();
up = viewdir.Cross (right) * -1.0f;
up.Normalize ();
}
// Direct the camera toward a specific point in space using the specified upward orientation
public void LookAt(Vertex point, Vector upVector)
{
viewdir = point - position;
viewdir.Normalize ();
up = upVector.Normal;
right = viewdir.Cross (up);
right.Normalize ();
}
