Further advances in nuklear port.

Rendering now looks similar to Qt version, needs a few tweaks:
* Proper multisampling
* Background

Missing features:
* Barcharts
* Interactivity (e.g. brushing/linking in all objects)
* History view of interactions

1 files changed, 8 insertions, 8 deletions

diff --git a/continuouscolorscale.cpp b/continuouscolorscale.cpp
index c729c6b..b7f2c93 100644
--- a/continuouscolorscale.cpp
+++ b/continuouscolorscale.cpp
@@ -9,8 +9,12 @@ ContinuousColorScale::ContinuousColorScale(std::initializer_list<QColor> colors)
 
 QColor ContinuousColorScale::color(float t) const
 {
-    if (t < m_min || t > m_max) {
-        return Color();
+    if (t <= m_min) {
+        return m_colors.front();
+    }
+
+    if (t >= m_max) {
+        return m_colors.back();
     }
 
     // normalize t
@@ -18,14 +22,10 @@ QColor ContinuousColorScale::color(float t) const
 
     // find which colors in the scale are adjacent to ours
     float step = 1.0 / m_colors.size();
-    int i = static_cast<int>(t / step);
-
-    if (i >= m_colors.size() - 1) {
-        return m_colors.back();
-    }
+    size_t i = static_cast<size_t>(t * m_colors.size());
 
     // normalize t between the two colors
-    int j = i + 1;
+    size_t j = i + 1;
     t = (t - i*step) / (j*step - i*step);
     return m_colors[i + round(t)];
 }