public Game()
{
Scene = new Scene();
Viewport = new Viewport { Scene = Scene, Width = 800, Height = 600 };
Camera = new Camera() { Target = Vector.Forward, Position = Vector.Zero };
Constructed();
}
public void Setup()
{
var viewport = new Viewport { Width = 640, Height = 480 };
_camera = new Camera() { Target = Vector.Forward, Position = Vector.Zero };
viewport.View = _camera;
_camera.Update(viewport);
_frustum = new Frustum();
_frustum.SetCameraDefinition(viewport, _camera);
}
public void SetCameraDefinition(Viewport viewport, Camera camera)
{
Vector dir, nc, fc, X, Y, Z;
SetCameraInternals(camera.FieldOfView, viewport.AspectRatio, camera.Near, camera.Far);
Z = camera.Target-camera.Position;
Z.Normalize();
X = camera.Up * Z;
X.Normalize();
Y = Z * X;
nc = camera.Position - Z * _near;
fc = camera.Position - Z * _far;
ntl = nc + Y * _nh - X * _nw;
ntr = nc + Y * _nh + X * _nw;
nbl = nc - Y * _nh - X * _nw;
nbr = nc - Y * _nh + X * _nw;
ftl = fc + Y * _fh - X * _fw;
ftr = fc + Y * _fh + X * _fw;
fbl = fc - Y * _fh - X * _fw;
fbr = fc - Y * _fh + X * _fw;
_planes[(int)FrustumLocation.Top].SetVectors(ntr, ntl, ftl);
_planes[(int)FrustumLocation.Bottom].SetVectors(nbl, nbr, fbr);
_planes[(int)FrustumLocation.Left].SetVectors(ntl, nbl, fbl);
_planes[(int)FrustumLocation.Right].SetVectors(nbr, ntr, fbr);
_planes[(int)FrustumLocation.Near].SetVectors(ntl, ntr, fbr);
_planes[(int)FrustumLocation.Far].SetVectors(ftr, ftl, fbl);
}
