New colormap

Post/ColorTable.cpp

@@ -246,8 +246,30 @@ void ColorTable_Recompute(GmshColorTable * ct)
         r = g = b = (int)(255 * (1. - curvature));
       }
       break;
-    case 10: // all white
-      r = g = b = 255;
+    case 10: // "french flag"
+      {
+        double ii = (double)(s - bias);
+        if(ii < 0) ii = 0;
+        if(ii > 1) ii = 1;
+        double rr =
+          ii >= .75 ? 2*(0.75-ii) + 1.:
+          ii >= .5  ? 1. :
+          ii >= .25 ? 4. * (ii-0.25) :
+          0.;
+        double gg =
+          ii <= .25 ? 1.33333 * ii :
+          ii <= .5  ? 0.33333 + 2.66667 * (ii-0.25) :
+          ii <= .75 ? 1 - 2.66667 * (ii-0.5) :
+          1.33333 * (1.-ii);
+        double bb =
+          ii <= 0.25 ? 2*ii + 0.5 :
+          ii <= 0.5  ? 1. :
+          ii <= 0.75 ? 4*(0.75-ii) :
+          0.;
+        r = (int)(rr * 255.);
+        g = (int)(gg * 255.);
+        b = (int)(bb * 255.);
+      }
       break;
     case 11: // matlab "hsv"
       {