# HG changeset patch
# User Chris Cannam
# Date 1541511347 0
# Node ID f08a3b8cdb9d76434c0b0d4f182f274cb2a33081
# Parent  d18ca558049eff0f253add17dcbc923c44b72daf
Avoid nan/inf values (and consequent crash) in colour scale range

diff -r d18ca558049e -r f08a3b8cdb9d layer/Colour3DPlotLayer.cpp
--- a/layer/Colour3DPlotLayer.cpp	Tue Nov 06 13:34:56 2018 +0000
+++ b/layer/Colour3DPlotLayer.cpp	Tue Nov 06 13:35:47 2018 +0000
@@ -1049,9 +1049,16 @@
                 << " (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;