private void Debug_VerifyCachedBounds()
{
Rect3D actualBounds = M3DUtil.ComputeAxisAlignedBoundingBox(Positions);
// The funny boolean logic below avoids asserts when the cached
// bounds contain NaNs. (NaN != NaN)
bool areEqual =
!(_cachedBounds.X <actualBounds.X || _cachedBounds.X> actualBounds.X) &&
!(_cachedBounds.Y <actualBounds.Y || _cachedBounds.Y> actualBounds.Y) &&
!(_cachedBounds.Z <actualBounds.Z || _cachedBounds.Z> actualBounds.Z) &&
!(_cachedBounds.SizeX <actualBounds.SizeX || _cachedBounds.SizeX> actualBounds.SizeX) &&
!(_cachedBounds.SizeY <actualBounds.SizeY || _cachedBounds.SizeY> actualBounds.SizeY) &&
!(_cachedBounds.SizeZ <actualBounds.SizeZ || _cachedBounds.SizeZ> actualBounds.SizeZ);
if (!areEqual)
{
if (_cachedBounds == Rect3D.Empty)
{
Debug.Fail("Cached bounds are invalid. Caller needs to check for IsEmpty and call UpdateCachedBounds.");
}
else
{
Debug.Fail("Cached bounds are invalid. We missed a call to SetCachedBoundsDirty.");
}
}
}
// Updates the _cachedBounds member to the current bounds of the mesh.
// This method must be called before accessing _cachedBounds if
// _cachedBounds.IsEmpty is true. Otherwise the _cachedBounds are
// current and do not need to be recomputed. See also Debug_VerifyCachedBounds.
private void UpdateCachedBounds()
{
Debug.Assert(_cachedBounds.IsEmpty,
"PERF: Caller should verify that bounds are dirty before recomputing.");
_cachedBounds = M3DUtil.ComputeAxisAlignedBoundingBox(Positions);
}
