protected override void OnUpdateFrame(FrameEventArgs e)
{
base.OnUpdateFrame(e);
etime += (float)e.Time;
if (!paused)
{
//update water
if (--updateCountdown == 0)
{
updateCountdown = 5;
t.UpdateState(updates++);
}
}
//move
Vector3 forward = (target - eye); //should be a unit vectorial
forward.Y = 0;
Vector3 left = new Vector3(forward.Z, 0, -forward.X);
Vector3 step = Vector3.Zero;
KeyboardState kb = OpenTK.Input.Keyboard.GetState();
if (kb[Key.W])
{
step += forward;
}
if (kb[Key.S])
{
step += -forward;
}
if (kb[Key.A])
{
step += left;
}
if (kb[Key.D])
{
step += -left;
}
if (kb[Key.Escape])
{
Close();
}
if (kb[Key.Space])
{
step = Vector3.UnitY;
}
if (kb[Key.ControlLeft])
{
step = -Vector3.UnitY;
}
if (step != Vector3.Zero)
{
step.Normalize();
}
step *= move_speed * (float)e.Time;
eye += step;
target += step;
//look
MouseState ms = OpenTK.Input.Mouse.GetState();
Vector2 mouse = new Vector2(ms.X, ms.Y);
float mouse_ZX = (oldmouse - mouse).X; //how far the mouse moved sideways
float mouse_UD = (mouse - oldmouse).Y; //how far the mouse moved up and down
Matrix4 rotate = Matrix4.CreateRotationY(mouse_ZX * mouse_speed * (float)e.Time);
Matrix4 rotateUD = Matrix4.CreateFromAxisAngle(left, mouse_UD * mouse_speed * (float)e.Time);
oldmouse = mouse;
target -= eye;
target = Vector3.Transform(target, rotate);
Vector3 ud = Vector3.Transform(target, rotateUD);
if (Vector3.Dot(ud, forward) > 0)
{
target = ud;
}
target += eye;
//lighting
if (movesun)
{
lightPos[0] = 50 + (float)Math.Cos(etime / 6) * 300;
lightPos[1] = 100;
lightPos[2] = 50 + (float)Math.Sin(etime / 6) * 300;
}
else
{
lightPos[0] = 50;
lightPos[1] = 100;
lightPos[2] = 50;
}
}
