From 277326fd335d135432297dce6e615d948140468f Mon Sep 17 00:00:00 2001
From: Tobias Rittig <tobias.rittig@t-online.de>
Date: Wed, 6 Dec 2017 11:59:59 +0100
Subject: [PATCH] #Fix data interface for quantizedDirections in `gridvolume`

---
 src/volume/gridvolume.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/volume/gridvolume.cpp b/src/volume/gridvolume.cpp
index 088b00c8d..27651baec 100644
--- a/src/volume/gridvolume.cpp
+++ b/src/volume/gridvolume.cpp
@@ -261,9 +261,9 @@ class GridDataSource : public VolumeDataSource {
                 break;
             case EQuantizedDirections:
                 format = "qdir";
-                if (m_channels != 3)
+                if (m_channels != 2)
                     Log(EError, "Encountered an unsupported quantized direction "
-                            "volume data file (%i channels, only 3 are supported)",
+                            "volume data file (%i channels, only 2 are supported)",
                             m_channels);
                 break;
             default:
@@ -579,7 +579,7 @@ class GridDataSource : public VolumeDataSource {
 
     bool supportsFloatLookups() const { return m_channels == 1; }
     bool supportsSpectrumLookups() const { return m_channels == 3; }
-    bool supportsVectorLookups() const { return m_channels == 3; }
+    bool supportsVectorLookups() const { return (m_volumeType == EFloat32 && m_channels == 3) || (m_volumeType == EQuantizedDirections && m_channels == 2); }
     Float getStepSize() const { return m_stepSize; }
 
     Float getMaximumFloatValue() const {