Wu Hui <[email protected]> (16/11/2009): > I add an Text to the HUD, and want to updata this text every frame > in a callback function using settext every frame. However, the > program will crash, the error is " map/set not dereferenceable" > "vector iterator not decrementable " or something in Wincore.cpp .I > think this must have something to do with the source code of the > Text implementation. Would someone tell me how this problem happen?
IIRC it's possible to get errors that may look like bugs in OSG itself, but it also can mean you're not doing things right. Wild guess: - you're trying to update the text while it's being used elsewhere in the code, resulting in broken pointers/reference count, etc. You could try: - to set the Data Variance for this object to DYNAMIC, telling the framework you might update this text object at any moment. - to update the text at a more appropriate time, differentiating between the various traversals. That's based on my recollection before using proper callbacks. The former is probably a quick way to get things working. The latter is probably better in the long run once you're comfortable with various concepts in OSG. Cheers, -- Cyril Brulebois
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