Add explicit support for invalid steps
Change-Id: Ib4ff395a044bf053f81d06058d7fd13f5f4f54d7
diff --git a/internal/ceres/levenberg_marquardt_strategy.h b/internal/ceres/levenberg_marquardt_strategy.h
index 274e972..4ed1390 100644
--- a/internal/ceres/levenberg_marquardt_strategy.h
+++ b/internal/ceres/levenberg_marquardt_strategy.h
@@ -55,6 +55,14 @@
double* step);
virtual void StepAccepted(double step_quality);
virtual void StepRejected(double step_quality);
+ virtual void StepIsInvalid() {
+ // Treat the current step as a rejected step with no increase in
+ // solution quality. Since rejected steps lead to decrease in the
+ // size of the trust region, the next time ComputeStep is called,
+ // this will lead to a better conditioned system.
+ StepRejected(0.0);
+ }
+
virtual double Radius() const;
private:
