Improvements related to ColorScale and screenshots.

* ColorScale: now a pointer whenever needed. main() takes care of
  updating extents
* New class DivergentColorScale: works specifically for divergent
  scales, always has 3 colors as input: negative values, 0, positive
  values
* ManipulationHandler: ProjectionHistory no longer needed

1 files changed, 3 insertions, 3 deletions

diff --git a/voronoisplat.cpp b/voronoisplat.cpp
index ad553ba..2ae5a1b 100644
--- a/voronoisplat.cpp
+++ b/voronoisplat.cpp
@@ -79,10 +79,10 @@ void VoronoiSplat::setValues(const arma::vec &values)
     update();
 }
 
-void VoronoiSplat::setColorScale(const ColorScale &scale)
+void VoronoiSplat::setColorScale(const ColorScale *scale)
 {
-    m_cmap.resize(scale.numColors() * 3);
-    scale.sample(scale.numColors(), m_cmap.begin());
+    m_cmap.resize(SAMPLES * 3);
+    scale->sample(SAMPLES, m_cmap.begin());
     emit colorScaleChanged(scale);
 
     setColormapChanged(true);