Fixed a problem with terrain culling not updating as the camera FOV changes.

reported here: http://irrlicht.sourceforge.net/phpBB2/viewtopic.php?t=30575

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@1633 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/CTerrainSceneNode.cpp

@@ -38,7 +38,7 @@ namespace scene
 	OverrideDistanceThreshold(false), UseDefaultRotationPivot(true), ForceRecalculation(false),
 	OldCameraPosition(core::vector3df(-99999.9f, -99999.9f, -99999.9f)),
 	OldCameraRotation(core::vector3df(-99999.9f, -99999.9f, -99999.9f)),
-	CameraMovementDelta(10.0f), CameraRotationDelta(1.0f),
+	CameraMovementDelta(10.0f), CameraRotationDelta(1.0f),CameraFOVDelta(0.1f),
 	TCoordScale1(1.0f), TCoordScale2(1.0f), FileSystem(fs)
 	{
 		#ifdef _DEBUG
@@ -451,6 +451,8 @@ namespace scene
 		// Determine the camera rotation, based on the camera direction.
 		const core::vector3df cameraPosition = SceneManager->getActiveCamera()->getAbsolutePosition();
 		const core::vector3df cameraRotation = core::line3d<f32>(cameraPosition, SceneManager->getActiveCamera()->getTarget()).getVector().getHorizontalAngle();
+		const f32 CameraFOV = SceneManager->getActiveCamera()->getFOV();
+
 
 		// Only check on the Camera's Y Rotation
 		if (!ForceRecalculation)
@@ -462,13 +464,18 @@ namespace scene
 					(fabs(cameraPosition.Y - OldCameraPosition.Y) < CameraMovementDelta) &&
 					(fabs(cameraPosition.Z - OldCameraPosition.Z) < CameraMovementDelta))
 				{
-					return;
+					if (fabs(CameraFOV-OldCameraFOV) < CameraFOVDelta)
+					{
+						return;
+					}
 				}
 			}
 		}
 
 		OldCameraPosition = cameraPosition;
 		OldCameraRotation = cameraRotation;
+		OldCameraFOV = CameraFOV;
+
 		const SViewFrustum* frustum = SceneManager->getActiveCamera()->getViewFrustum();
 
 		// Determine each patches LOD based on distance from camera ( and whether or not they are in

source/Irrlicht/CTerrainSceneNode.h

@@ -324,8 +324,10 @@ namespace scene
 
 		core::vector3df	OldCameraPosition;
 		core::vector3df	OldCameraRotation;
+		f32				OldCameraFOV;
 		f32 CameraMovementDelta;
 		f32 CameraRotationDelta;
+		f32 CameraFOVDelta;
 
 		// needed for (de)serialization
 		f32 TCoordScale1;