From 3a7a8a260a4c0729e2b9942fcffa563d3a90c48c Mon Sep 17 00:00:00 2001
From: Zack Galbreath <zack.galbreath@kitware.com>
Date: Thu, 18 Apr 2013 15:37:36 -0400
Subject: [PATCH] better support for comparing identical trees
we now treat this as a special case to make sure that the difference
tree is visualized all in grey.
Change-Id: I3718a8e1989ffd7060a5bcce599e010941572dda
---
Views/Infovis/vtkTreeHeatmapItem.cxx | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/Views/Infovis/vtkTreeHeatmapItem.cxx b/Views/Infovis/vtkTreeHeatmapItem.cxx
index 6604283d018..c0c6393a561 100644
--- a/Views/Infovis/vtkTreeHeatmapItem.cxx
+++ b/Views/Infovis/vtkTreeHeatmapItem.cxx
@@ -1398,8 +1398,11 @@ void vtkTreeHeatmapItem::SetTreeColorArray(const char *arrayName)
return;
}
+ this->ColorTree = true;
+
double minDifference = VTK_DOUBLE_MAX;
double maxDifference = VTK_DOUBLE_MIN;
+
for (vtkIdType id = 0; id < this->TreeColorArray->GetNumberOfTuples(); ++id)
{
double d = this->TreeColorArray->GetValue(id);
@@ -1413,6 +1416,15 @@ void vtkTreeHeatmapItem::SetTreeColorArray(const char *arrayName)
}
}
+ // special case when there is no difference. Without this, all the
+ // edges would be drawn in either red or blue.
+ if (minDifference == maxDifference)
+ {
+ this->TreeLookupTable->SetNumberOfTableValues(1);
+ this->TreeLookupTable->SetTableValue(10, 0.60, 0.60, 0.60);
+ return;
+ }
+
// how much we vary the colors from step to step
double inc = 0.06;
@@ -1439,8 +1451,6 @@ void vtkTreeHeatmapItem::SetTreeColorArray(const char *arrayName)
this->TreeLookupTable->SetTableValue(i,
0.85 - inc * (i - 10), 0.85 - inc * (i - 10), 1.0);
}
-
- this->ColorTree = true;
}
//-----------------------------------------------------------------------------
--
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