public void Update(Camera camera, Size viewportSize)
{
// Pre-divide the position to make them small
var pos = camera.GetPosition() / FRUSTUM_DIVISOR;
var target = camera.Target / FRUSTUM_DIVISOR;
var dir = System.Numerics.Vector3.Normalize(target - pos);
//Extract the up vector from the second column of the rotation matrix
System.Numerics.Matrix4x4 rotMatrix = camera.GetRotationMatrix();
System.Numerics.Vector3 up = new System.Numerics.Vector3(rotMatrix.M21, rotMatrix.M22, rotMatrix.M23);
var frustumParams = new FrustumCameraParams()
{
Position = pos.ToSharpDX(),
LookAtDir = dir.ToSharpDX(),
UpDir = up.ToSharpDX(),
AspectRatio = viewportSize.Width / (float)viewportSize.Height,
ZFar = FRUSTUM_DIVISOR * 200,
ZNear = 1 / FRUSTUM_DIVISOR,
// Blow up FOV a bit for cases when out-of-bounds objects are used
FOV = camera.FieldOfView * 1.2f,
};
if (!_frustumParams.HasValue ||
_frustumParams.Value.Position != frustumParams.Position ||
_frustumParams.Value.LookAtDir != frustumParams.LookAtDir ||
_frustumParams.Value.UpDir != frustumParams.UpDir ||
_frustumParams.Value.FOV != frustumParams.FOV)
{
_frustumParams = frustumParams;
_frustum = BoundingFrustum.FromCamera(frustumParams);
}
}
public void Update()
{
ScreenViewProjectionMatrix = ViewMatrix * ProjectionMatrix * ViewportMatrix;
if (Camera != null)
{
CameraParams = Camera.CreateCameraParams(ActualWidth / ActualHeight, NearPlane, FarPlane);
}
}
public static IEnumerable <Line3D> CreateWiredPyramid(BoundingFrustum frustum)
{
FrustumCameraParams prms = frustum.GetCameraParams();
Vector3[] corners = frustum.GetCorners();
Vector3[] vertices = new Vector3[5];
vertices[0] = prms.Position;
vertices[1] = corners[4];
vertices[2] = corners[5];
vertices[3] = corners[6];
vertices[4] = corners[7];
List <int> indexes = new List <int>(16)
{
0,
1,
0,
2,
0,
3,
0,
4,
1,
2,
2,
3,
3,
4,
4,
1
};
return(CreateFromVertices(vertices, indexes));
}
