From f3491cbc2c5ddc6870d69d9a06da3ac96c3827b1 Mon Sep 17 00:00:00 2001
From: codeanticode <andres.colubri@gmail.com>
Date: Mon, 3 Jun 2013 11:23:04 -0400
Subject: [PATCH] address regression reported in #1846

---
 core/src/processing/opengl/PShapeOpenGL.java | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/core/src/processing/opengl/PShapeOpenGL.java b/core/src/processing/opengl/PShapeOpenGL.java
index 6a525c11d..e194d0eb3 100644
--- a/core/src/processing/opengl/PShapeOpenGL.java
+++ b/core/src/processing/opengl/PShapeOpenGL.java
@@ -1446,7 +1446,14 @@ public class PShapeOpenGL extends PShape {
 
   @Override
   public int getVertexCount() {
-    return family == GROUP ? 0 : inGeo.vertexCount;
+    if (family == GROUP) return 0; // Group shapes don't have vertices
+    else {
+      if (family == PRIMITIVE) {
+        // the input geometry of primitive shapes is built during tessellation
+        updateTessellation();
+      }
+      return inGeo.vertexCount;
+    }
   }