Dfert

hi, im trying to create a plane from a model (the Game's level) in order to check it against the camera's bounding sphere, does anyone know of a good tutorial, or a good way of doing that

any help would be greatly appreciated.

### Re: XNA Game Studio Express Creating Plane From A Model?

Glenn Wilson

As these forums are going to be turned to read only you should post your questions on the new http://creators.xna.com site. In regards to the log on have a look at my answer here on how to get yourself set up.

### Re: XNA Game Studio Express Creating Plane From A Model?

Tridex

Hi if you are just tryinh to cull objects , try this

Check offset is how far away form the camera you what its to be visible.. the rest is sence!!!

'*****************************************************************************

'*MyCamera.IsVisibleCheck2 ****** Very GOOD the best frustrum culling so far nice obe abidreams.com

'*

'******************************************************************************

Public Function IsVisibleCheckGood(ByVal point As Vector3, ByVal checkOffset As Single) As Boolean

Dim vector As Vector4 = Vector4.Transform(New Vector4(point.X, point.Y, point.Z, 1.0!), Me.ShaderViewProjection)

If (vector.Z > (vector.W - 1.0!)) Then

Dim vector2 As New Vector2((vector.X / vector.W), (vector.Y / vector.W))

Dim num As Single = System.Math.Abs(vector.Z)

If (num < 5.0!) Then

Return True

End If

checkOffset = (1.0! + (checkOffset / num))

If (((vector2.X >= -checkOffset) AndAlso (vector2.X <= checkOffset)) AndAlso (vector2.Y >= -checkOffset)) Then

Return (vector2.Y <= checkOffset)

End If

End If

Return False

End Function

### Re: XNA Game Studio Express Creating Plane From A Model?

Dfert

I was thinking more along the lines of plane - sphere intersection ( i actually dont know what culling is...)