[Helix] Fade edges of base pairs

diff --git a/ShaheenGandhi.pde b/ShaheenGandhi.pde
index f94e5e4992c2e519fcef2a71a1e6ffeb83470f3e..a4b5532d57055a1611943b31d68ff8c2b5292192 100644 (file)
--- a/ShaheenGandhi.pde
+++ b/ShaheenGandhi.pde
@@ -222,7 +222,8 @@ class HelixPattern extends SCPattern {
     }
     Line spokeLine = basePairs[spokeIndex];
     PVector pointOnSpoke = spokeLine.projectPoint(pt);
-    float b = ((PVector.dist(pt, pointOnSpoke) < spokeGirth) && (PVector.dist(pointOnSpoke, spokeLine.getPoint()) < spokeRadius)) ? 100.f : 0.f;
+    float d = PVector.dist(pt, pointOnSpoke);
+    float b = (PVector.dist(pointOnSpoke, spokeLine.getPoint()) < spokeRadius) ? constrain(100*(1 - ((d-.5*spokeGirth)/(spokeGirth*.5))), 0, 100) : 0.f;
     return color(100, 80.f, b);
   }