comparison layer/Colour3DPlotLayer.cpp @ 1378:f08a3b8cdb9d

Avoid nan/inf values (and consequent crash) in colour scale range

         SVDEBUG << "Colour3DPlotLayer: rebuilding renderer, value range is "
                 << minValue << " -> " << maxValue
                 << " (model min = " << m_model->getMinimumLevel()
                 << ", max = " << m_model->getMaximumLevel() << ")"
                 << endl;
-        
+
         if (maxValue <= minValue) {
             maxValue = minValue + 0.1f;
+
+            if (!(maxValue > minValue)) { // one of them must be NaN or Inf
+                SVCERR << "WARNING: Colour3DPlotLayer::getRenderer: resetting "
+                       << "minValue and maxValue to zero and one" << endl;
+                minValue = 0.f;
+                maxValue = 1.f;
+            }
         }
 
         cparams.threshold = minValue;
         cparams.minValue = minValue;
         cparams.maxValue = maxValue;