Am 04.03.2016 um 19:51 schrieb Le_Forgeron:
> Le 04/03/2016 19:41, William F Pokorny a écrit :

> Nope, even with a produced "right" picture, valgrind reports a definitive problem of
uninitialised data.

If valgrind was right, that would certainly explain the problems.
Unfortunately it's mistaken.

Valgrind's report indicates that Bezier_Node_Struct::Radius_Squared is
not (or not always) initialized properly when
BicubicPatch::bezier_tree_walker() is called.

But if that is the case, then adding

    Node->Radius_Squared = -1;

to BicubicPatch::create_new_bezier_node() and adding

    POV_ASSERT(Node->Radius_Squared >= 0);

to the beginning of BicubicPatch::bezier_tree_walker() should force the
code to bomb.

It doesn't. Valgrind must be seeing ghosts.

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