DrawContext.IsAvailable
Method
Description:
Checks whether the facilities of this class are available for use in the current scope.
Checks whether the facilities of this class are available for use in the current scope.
Remarks:
This class can perform drawing operations and access the state of parameters related to drawing only in lock-step with rendering inside of Revit. As a consequence, the facilities of this class are not available for use outside of the scope determined by the callback RenderScene(View, DisplayStyle). Certain methods of other DirectContext3D objects, e.g., VertexBuffer::Map() are similarly restricted by the same scope.