From cf0a22d22a402f230d834853416a074833fe08bf Mon Sep 17 00:00:00 2001
From: Samuel Fadel <samuelfadel@gmail.com>
Date: Thu, 7 Apr 2016 17:01:14 -0300
Subject: LinePlot: working relaxation.

---
 lineplot.cpp | 16 ++++++++++++----
 lineplot.h   |  5 +++--
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/lineplot.cpp b/lineplot.cpp
index 83f6e12..0e9e001 100644
--- a/lineplot.cpp
+++ b/lineplot.cpp
@@ -58,6 +58,15 @@ void LinePlot::setColorScale(const ColorScale *scale)
     update();
 }
 
+void LinePlot::relax()
+{
+    m_gdFinalPtr.reset(new GraphDrawing);
+    *m_gdFinalPtr.get() = *m_gdBundlePtr.get();
+    m_gdFinalPtr.get()->interpolate(*m_gdPtr.get(), m_relaxation);
+
+    setLinesChanged(true);
+}
+
 void LinePlot::bundle()
 {
     m_gdBundlePtr.reset(new GraphDrawing);
@@ -78,7 +87,6 @@ void LinePlot::bundle()
 
     bundling.spl = m_edgeSampling;
     bundling.eps = m_advectionSpeed;
-    // TODO: use m_relaxation as lerp param towards original (without bundling)
 
     if (m_bundleGPU) {
         bundling.bundleGPU();
@@ -86,7 +94,7 @@ void LinePlot::bundle()
         bundling.bundleCPU();
     }
 
-    setLinesChanged(true);
+    relax();
 }
 
 void LinePlot::setLines(const arma::uvec &indices, const arma::mat &Y)
@@ -288,7 +296,7 @@ void LinePlot::setRelaxation(float relaxation)
     m_relaxation = relaxation;
     emit relaxationChanged(m_relaxation);
 
-    bundle();
+    relax();
     update();
 }
 
@@ -545,7 +553,7 @@ void LinePlotRenderer::synchronize(QQuickFramebufferObject *item)
     m_colormapChanged = plot->colorScaleChanged();
 
     if (m_pointsChanged) {
-        copyPolylines(plot->bundleGraphDrawing());
+        copyPolylines(plot->graphDrawing());
     }
     m_values = &(plot->values());
     m_cmap   = &(plot->colorScale());
diff --git a/lineplot.h b/lineplot.h
index bc6340c..facb138 100644
--- a/lineplot.h
+++ b/lineplot.h
@@ -44,7 +44,7 @@ public:
 
     void setColorScale(const ColorScale *scale);
 
-    const GraphDrawing *bundleGraphDrawing() const { return m_gdBundlePtr.get(); }
+    const GraphDrawing *graphDrawing() const { return m_gdFinalPtr.get(); }
     const std::vector<float> &values()       const { return m_values; }
     const std::vector<float> &colorScale()   const { return m_cmap; }
     LinearScale<float> scaleX() const { return m_sx; }
@@ -131,6 +131,7 @@ public slots:
 
 private:
     void bundle();
+    void relax();
 
     // Data
     arma::mat m_lines;
@@ -139,7 +140,7 @@ private:
     // Visuals
     std::vector<float> m_cmap;
     LinearScale<float> m_sx, m_sy;
-    std::unique_ptr<GraphDrawing> m_gdPtr, m_gdBundlePtr;
+    std::unique_ptr<GraphDrawing> m_gdPtr, m_gdBundlePtr, m_gdFinalPtr;
 
     // Internal state
     bool m_linesChanged, m_valuesChanged, m_colorScaleChanged;
-- 
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