shortcut to is_planar check

2004-11-24 22:20:42 +00:00 · 2004-11-24 22:20:42 +00:00 · ac4d4d1c1c
parent 1ed3266d9e
commit ac4d4d1c1c
1 changed files with 6 additions and 0 deletions
--- a/panda/src/egg/eggPolygon.cxx
+++ b/panda/src/egg/eggPolygon.cxx
@ -98,6 +98,12 @@ calculate_normal(Normald &result, CoordinateSystem cs) const {
 ////////////////////////////////////////////////////////////////////
 bool EggPolygon::
 is_planar() const {
+  if (size() <= 3) {
+    // If we don't have more than three vertices, we can't be
+    // non-planar.
+    return true;
+  }
+
  Normald normal;
  if (!calculate_normal(normal)) {
    // A degenerate polygon--all of the vertices are within one line,