1 files changed, 959 insertions, 0 deletions
diff --git a/gfx/tests/gtest/TestBSPTree.cpp b/gfx/tests/gtest/TestBSPTree.cpp
new file mode 100644
index 000000000..1a84e37b6
--- /dev/null
+++ b/gfx/tests/gtest/TestBSPTree.cpp
@@ -0,0 +1,959 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "gtest/gtest.h"
+
+#include "BSPTree.h"
+#include "Polygon.h"
+#include "PolygonTestUtils.h"
+
+#include <deque>
+
+using namespace mozilla::gfx;
+using namespace mozilla::layers;
+
+namespace {
+
+static void RunTest(std::deque<Polygon3D> aPolygons,
+                    std::deque<Polygon3D> aExpected)
+{
+  std::deque<LayerPolygon> layers;
+  for (Polygon3D& polygon : aPolygons) {
+    layers.push_back(LayerPolygon(nullptr, Move(polygon)));
+  }
+
+  const BSPTree tree(layers);
+  const nsTArray<LayerPolygon> order = tree.GetDrawOrder();
+
+  EXPECT_EQ(aExpected.size(), order.Length());
+
+  for (size_t i = 0; i < order.Length(); ++i) {
+    EXPECT_TRUE(aExpected[i] == *order[i].geometry);
+  }
+}
+
+} // namespace
+
+
+TEST(BSPTree, SameNode)
+{
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(0.0f, 0.0f, 0.0f),
+      Point3D(1.0f, 0.0f, 0.0f),
+      Point3D(1.0f, 1.0f, 0.0f),
+      Point3D(0.0f, 1.0f, 0.0f)
+    },
+    Polygon3D {
+      Point3D(0.0f, 0.0f, 0.0f),
+      Point3D(1.0f, 0.0f, 0.0f),
+      Point3D(1.0f, 1.0f, 0.0f),
+      Point3D(0.0f, 1.0f, 0.0f)
+    }
+  };
+
+  ::RunTest(polygons, polygons);
+}
+
+TEST(BSPTree, OneChild)
+{
+  const Polygon3D p1 {
+    Point3D(0.0f, 0.0f, 0.0f),
+    Point3D(1.0f, 0.0f, 0.0f),
+    Point3D(1.0f, 1.0f, 0.0f),
+    Point3D(0.0f, 1.0f, 0.0f)
+  };
+
+  const Polygon3D p2 {
+    Point3D(0.0f, 0.0f, 1.0f),
+    Point3D(1.0f, 0.0f, 1.0f),
+    Point3D(1.0f, 1.0f, 1.0f),
+    Point3D(0.0f, 1.0f, 1.0f)
+  };
+
+  ::RunTest({p1, p2}, {p1, p2});
+  ::RunTest({p2, p1}, {p1, p2});
+}
+
+TEST(BSPTree, SharedEdge1)
+{
+  Polygon3D p1 {
+    Point3D(1.0f, 0.0f, 1.0f),
+    Point3D(0.0f, 0.0f, 1.0f),
+    Point3D(0.0f, 1.0f, 1.0f),
+    Point3D(1.0f, 1.0f, 1.0f)
+  };
+
+  Polygon3D p2 {
+    Point3D(1.0f, 0.0f, 1.0f),
+    Point3D(1.0f, 1.0f, 1.0f),
+    Point3D(2.0f, 2.0f, 1.0f),
+    Point3D(2.0f, 0.0f, 1.0f)
+  };
+
+  ::RunTest({p1, p2}, {p1, p2});
+}
+
+TEST(BSPTree, SharedEdge2)
+{
+  Polygon3D p1 {
+    Point3D(1.0f, 0.0f, 1.0f),
+    Point3D(0.0f, 0.0f, 1.0f),
+    Point3D(0.0f, 1.0f, 1.0f),
+    Point3D(1.0f, 1.0f, 1.0f)
+  };
+
+  Polygon3D p2 {
+    Point3D(1.0f, 0.0f, 1.0f),
+    Point3D(1.0f, 1.0f, 1.0f),
+    Point3D(2.0f, 2.0f, 0.0f),
+    Point3D(2.0f, 0.0f, 0.0f)
+  };
+
+  ::RunTest({p1, p2}, {p2, p1});
+}
+
+TEST(BSPTree, SplitSharedEdge)
+{
+  Polygon3D p1 {
+    Point3D(1.0f, 0.0f, 1.0f),
+    Point3D(0.0f, 0.0f, 1.0f),
+    Point3D(0.0f, 1.0f, 1.0f),
+    Point3D(1.0f, 1.0f, 1.0f)
+  };
+
+  Polygon3D p2 {
+    Point3D(1.0f, 0.0f, 2.0f),
+    Point3D(1.0f, 1.0f, 2.0f),
+    Point3D(1.0f, 1.0f, 0.0f),
+    Point3D(1.0f, 0.0f, 0.0f)
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(1.0f, 1.0f, 1.0f),
+      Point3D(1.0f, 1.0f, 0.0f),
+      Point3D(1.0f, 0.0f, 0.0f),
+      Point3D(1.0f, 0.0f, 1.0f)
+    },
+    Polygon3D {
+      Point3D(1.0f, 0.0f, 1.0f),
+      Point3D(0.0f, 0.0f, 1.0f),
+      Point3D(0.0f, 1.0f, 1.0f),
+      Point3D(1.0f, 1.0f, 1.0f)
+    },
+    Polygon3D {
+      Point3D(1.0f, 0.0f, 2.0f),
+      Point3D(1.0f, 1.0f, 2.0f),
+      Point3D(1.0f, 1.0f, 1.0f),
+      Point3D(1.0f, 0.0f, 1.0f)
+    }
+  };
+
+  ::RunTest({p1, p2}, expected);
+}
+
+TEST(BSPTree, SplitSimple1)
+{
+  Polygon3D p1 {
+    Point3D(0.0f, 0.0f, 1.0f),
+    Point3D(1.0f, 0.0f, 1.0f),
+    Point3D(1.0f, 1.0f, 1.0f),
+    Point3D(0.0f, 1.0f, 1.0f)
+  };
+
+  Polygon3D p2 {
+    Point3D(0.0f, 0.0f, 2.0f),
+    Point3D(1.0f, 0.0f, 2.0f),
+    Point3D(1.0f, 1.0f, 0.0f),
+    Point3D(0.0f, 1.0f, 0.0f)
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(0.0f, 1.0f, 0.0f),
+      Point3D(0.0f, 0.5f, 1.0f),
+      Point3D(1.0f, 0.5f, 1.0f),
+      Point3D(1.0f, 1.0f, 0.0f)
+    },
+    p1,
+    Polygon3D {
+      Point3D(0.0f, 0.0f, 2.0f),
+      Point3D(1.0f, 0.0f, 2.0f),
+      Point3D(1.0f, 0.5f, 1.0f),
+      Point3D(0.0f, 0.5f, 1.0f)
+    }
+  };
+
+  ::RunTest({p1, p2}, expected);
+}
+
+TEST(BSPTree, SplitSimple2) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(-5.00000f, -5.00000f, 0.00000f),
+      Point3D(-5.00000f, 5.00000f, 0.00000f),
+      Point3D(5.00000f, 5.00000f, 0.00000f),
+      Point3D(5.00000f, -5.00000f, 0.00000f)
+    },
+    Polygon3D {
+      Point3D(0.00000f, -5.00000f, -5.00000f),
+      Point3D(0.00000f, 5.00000f, -5.00000f),
+      Point3D(0.00000f, 5.00000f, 5.00000f),
+      Point3D(0.00000f, -5.00000f, 5.00000f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(0.00000f, -5.00000f, 0.00000f),
+      Point3D(0.00000f, -5.00000f, -5.00000f),
+      Point3D(0.00000f, 5.00000f, -5.00000f),
+      Point3D(0.00000f, 5.00000f, 0.00000f)
+    },
+    Polygon3D {
+      Point3D(-5.00000f, -5.00000f, 0.00000f),
+      Point3D(-5.00000f, 5.00000f, 0.00000f),
+      Point3D(5.00000f, 5.00000f, 0.00000f),
+      Point3D(5.00000f, -5.00000f, 0.00000f)
+    },
+    Polygon3D {
+      Point3D(0.00000f, 5.00000f, 0.00000f),
+      Point3D(0.00000f, 5.00000f, 5.00000f),
+      Point3D(0.00000f, -5.00000f, 5.00000f),
+      Point3D(0.00000f, -5.00000f, 0.00000f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}
+
+TEST(BSPTree, NoSplit1) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(0.00000f, 10.00000f, 0.00000f),
+      Point3D(0.00000f, 0.00000f, 0.00000f),
+      Point3D(10.00000f, 0.00000f, 0.00000f),
+      Point3D(10.00000f, 10.00000f, 0.00000f)
+    },
+    Polygon3D {
+      Point3D(0.00000f, 10.00000f, -5.00000f),
+      Point3D(0.00000f, 0.00000f, -5.00000f),
+      Point3D(10.00000f, 0.00000f, -5.00000f),
+      Point3D(10.00000f, 10.00000f, -5.00000f)
+    },
+    Polygon3D {
+      Point3D(0.00000f, 10.00000f, 5.00000f),
+      Point3D(0.00000f, 0.00000f, 5.00000f),
+      Point3D(10.00000f, 0.00000f, 5.00000f),
+      Point3D(10.00000f, 10.00000f, 5.00000f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(0.00000f, 10.00000f, -5.00000f),
+      Point3D(0.00000f, 0.00000f, -5.00000f),
+      Point3D(10.00000f, 0.00000f, -5.00000f),
+      Point3D(10.00000f, 10.00000f, -5.00000f)
+    },
+    Polygon3D {
+      Point3D(0.00000f, 10.00000f, 0.00000f),
+      Point3D(0.00000f, 0.00000f, 0.00000f),
+      Point3D(10.00000f, 0.00000f, 0.00000f),
+      Point3D(10.00000f, 10.00000f, 0.00000f)
+    },
+    Polygon3D {
+      Point3D(0.00000f, 10.00000f, 5.00000f),
+      Point3D(0.00000f, 0.00000f, 5.00000f),
+      Point3D(10.00000f, 0.00000f, 5.00000f),
+      Point3D(10.00000f, 10.00000f, 5.00000f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}
+
+TEST(BSPTree, NoSplit2) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(-5.00000f, -5.00000f, 0.00000f),
+      Point3D(-5.00000f, 5.00000f, 0.00000f),
+      Point3D(5.00000f, 5.00000f, 0.00000f),
+      Point3D(5.00000f, -5.00000f, 0.00000f)
+    },
+    Polygon3D {
+      Point3D(0.00000f, 5.00000f, -15.00000f),
+      Point3D(0.00000f, -5.00000f, -15.00000f),
+      Point3D(0.00000f, -5.00000f, -10.00000f),
+      Point3D(0.00000f, 5.00000f, -10.00000f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(0.00000f, 5.00000f, -15.00000f),
+      Point3D(0.00000f, -5.00000f, -15.00000f),
+      Point3D(0.00000f, -5.00000f, -10.00000f),
+      Point3D(0.00000f, 5.00000f, -10.00000f)
+    },
+    Polygon3D {
+      Point3D(-5.00000f, -5.00000f, 0.00000f),
+      Point3D(-5.00000f, 5.00000f, 0.00000f),
+      Point3D(5.00000f, 5.00000f, 0.00000f),
+      Point3D(5.00000f, -5.00000f, 0.00000f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}
+
+TEST(BSPTree, TwoPlaneIntersectRotate0degrees) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(-0.00000f, 2.00000f, 2.00000f),
+      Point3D(-0.00000f, -2.00000f, 2.00000f),
+      Point3D(0.00010f, -2.00000f, -2.00000f),
+      Point3D(0.00010f, 2.00000f, -2.00000f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, 0.00000f, 2.00000f),
+      Point3D(2.00000f, -0.00000f, -2.00000f),
+      Point3D(-2.00000f, 0.00000f, -2.00000f),
+      Point3D(-2.00000f, 0.00010f, 2.00000f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(2.00000f, 0.00000f, 2.00000f),
+      Point3D(2.00000f, -0.00000f, -2.00000f),
+      Point3D(-2.00000f, 0.00000f, -2.00000f),
+      Point3D(-2.00000f, 0.00010f, 2.00000f)
+    },
+    Polygon3D {
+      Point3D(-0.00000f, 2.00000f, 2.00000f),
+      Point3D(-0.00000f, -2.00000f, 2.00000f),
+      Point3D(0.00010f, -2.00000f, -2.00000f),
+      Point3D(0.00010f, 2.00000f, -2.00000f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}
+
+TEST(BSPTree, TwoPlaneIntersectRotate20degrees) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(-0.00000f, 1.19540f, 2.56350f),
+      Point3D(-0.00000f, -2.56340f, 1.19540f),
+      Point3D(0.00010f, -1.19530f, -2.56340f),
+      Point3D(0.00010f, 2.56350f, -1.19530f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, -0.68400f, 1.87940f),
+      Point3D(2.00000f, 0.68410f, -1.87930f),
+      Point3D(-2.00000f, 0.68410f, -1.87930f),
+      Point3D(-2.00000f, -0.68400f, 1.87940f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(2.00000f, -0.68400f, 1.87940f),
+      Point3D(2.00000f, 0.68410f, -1.87930f),
+      Point3D(-2.00000f, 0.68410f, -1.87930f),
+      Point3D(-2.00000f, -0.68400f, 1.87940f)
+    },
+    Polygon3D {
+      Point3D(-0.00000f, 1.19540f, 2.56350f),
+      Point3D(-0.00000f, -2.56340f, 1.19540f),
+      Point3D(0.00010f, -1.19530f, -2.56340f),
+      Point3D(0.00010f, 2.56350f, -1.19530f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}
+
+TEST(BSPTree, TwoPlaneIntersectRotate40degrees) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(-0.00000f, -0.73200f, 2.73210f),
+      Point3D(-0.00000f, -2.73200f, -0.73200f),
+      Point3D(0.00010f, 0.73210f, -2.73200f),
+      Point3D(0.00010f, 2.73210f, 0.73210f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, -1.73200f, 1.00000f),
+      Point3D(2.00000f, 1.73210f, -0.99990f),
+      Point3D(-2.00000f, 1.73210f, -0.99990f),
+      Point3D(-2.00000f, -1.73200f, 1.00000f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(2.00000f, -1.73200f, 1.00000f),
+      Point3D(2.00000f, 1.73210f, -0.99990f),
+      Point3D(-2.00000f, 1.73210f, -0.99990f),
+      Point3D(-2.00000f, -1.73200f, 1.00000f)
+    },
+    Polygon3D {
+      Point3D(-0.00000f, -0.73200f, 2.73210f),
+      Point3D(-0.00000f, -2.73200f, -0.73200f),
+      Point3D(0.00010f, 0.73210f, -2.73200f),
+      Point3D(0.00010f, 2.73210f, 0.73210f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}
+
+TEST(BSPTree, TwoPlaneIntersectRotate60degrees) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(-0.00000f, -2.73200f, 0.73210f),
+      Point3D(-0.00000f, -0.73200f, -2.73200f),
+      Point3D(0.00010f, 2.73210f, -0.73200f),
+      Point3D(0.00010f, 0.73210f, 2.73210f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, -1.73200f, -1.00000f),
+      Point3D(2.00000f, 1.73210f, 1.00010f),
+      Point3D(-2.00000f, 1.73210f, 1.00010f),
+      Point3D(-2.00000f, -1.73200f, -1.00000f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(-2.00000f, 1.26793f, 0.73210f),
+      Point3D(-2.00000f, -1.73200f, -1.00000f),
+      Point3D(2.00000f, -1.73200f, -1.00000f),
+      Point3D(2.00000f, 1.26793f, 0.73210f)
+    },
+    Polygon3D {
+      Point3D(-0.00000f, -2.73200f, 0.73210f),
+      Point3D(-0.00000f, -0.73200f, -2.73200f),
+      Point3D(0.00010f, 2.73210f, -0.73200f),
+      Point3D(0.00010f, 0.73210f, 2.73210f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, 1.26793f, 0.73210f),
+      Point3D(2.00000f, 1.73210f, 1.00010f),
+      Point3D(-2.00000f, 1.73210f, 1.00010f),
+      Point3D(-2.00000f, 1.26793f, 0.73210f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}
+
+TEST(BSPTree, TwoPlaneIntersectRotate80degrees) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(-0.00000f, -1.19530f, -2.56340f),
+      Point3D(-0.00000f, 2.56350f, -1.19530f),
+      Point3D(0.00010f, 1.19540f, 2.56350f),
+      Point3D(0.00010f, -2.56340f, 1.19540f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, 0.68410f, -1.87930f),
+      Point3D(2.00000f, -0.68400f, 1.87940f),
+      Point3D(-2.00000f, -0.68400f, 1.87940f),
+      Point3D(-2.00000f, 0.68410f, -1.87930f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(-0.00000f, -1.19530f, -2.56340f),
+      Point3D(-0.00000f, 2.56350f, -1.19530f),
+      Point3D(0.00010f, 1.19540f, 2.56350f),
+      Point3D(0.00010f, -2.56340f, 1.19540f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, 0.68410f, -1.87930f),
+      Point3D(2.00000f, -0.68400f, 1.87940f),
+      Point3D(-2.00000f, -0.68400f, 1.87940f),
+      Point3D(-2.00000f, 0.68410f, -1.87930f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}
+
+TEST(BSPTree, TwoPlaneIntersectRotate100degrees) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(-0.00000f, 2.73210f, -0.73200f),
+      Point3D(-0.00000f, 0.73210f, 2.73210f),
+      Point3D(0.00010f, -2.73200f, 0.73210f),
+      Point3D(0.00010f, -0.73200f, -2.73200f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, 1.73210f, 1.00010f),
+      Point3D(2.00000f, -1.73200f, -1.00000f),
+      Point3D(-2.00000f, -1.73200f, -1.00000f),
+      Point3D(-2.00000f, 1.73210f, 1.00010f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(2.00000f, -1.26783f, -0.73200f),
+      Point3D(2.00000f, -1.73200f, -1.00000f),
+      Point3D(-2.00000f, -1.73200f, -1.00000f),
+      Point3D(-2.00000f, -1.26783f, -0.73200f)
+    },
+    Polygon3D {
+      Point3D(-0.00000f, 2.73210f, -0.73200f),
+      Point3D(-0.00000f, 0.73210f, 2.73210f),
+      Point3D(0.00010f, -2.73200f, 0.73210f),
+      Point3D(0.00010f, -0.73200f, -2.73200f)
+    },
+    Polygon3D {
+      Point3D(-2.00000f, -1.26783f, -0.73200f),
+      Point3D(-2.00000f, 1.73210f, 1.00010f),
+      Point3D(2.00000f, 1.73210f, 1.00010f),
+      Point3D(2.00000f, -1.26783f, -0.73200f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}
+
+TEST(BSPTree, TwoPlaneIntersectRotate120degrees) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(-0.00000f, -0.73200f, 2.73210f),
+      Point3D(-0.00000f, -2.73200f, -0.73200f),
+      Point3D(0.00010f, 0.73210f, -2.73200f),
+      Point3D(0.00010f, 2.73210f, 0.73210f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, -1.73200f, 1.00000f),
+      Point3D(2.00000f, 1.73210f, -0.99990f),
+      Point3D(-2.00000f, 1.73210f, -0.99990f),
+      Point3D(-2.00000f, -1.73200f, 1.00000f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(2.00000f, -1.73200f, 1.00000f),
+      Point3D(2.00000f, 1.73210f, -0.99990f),
+      Point3D(-2.00000f, 1.73210f, -0.99990f),
+      Point3D(-2.00000f, -1.73200f, 1.00000f)
+    },
+    Polygon3D {
+      Point3D(-0.00000f, -0.73200f, 2.73210f),
+      Point3D(-0.00000f, -2.73200f, -0.73200f),
+      Point3D(0.00010f, 0.73210f, -2.73200f),
+      Point3D(0.00010f, 2.73210f, 0.73210f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}
+
+TEST(BSPTree, TwoPlaneIntersectRotate140degrees) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(-0.00000f, -1.19530f, -2.56340f),
+      Point3D(-0.00000f, 2.56350f, -1.19530f),
+      Point3D(0.00010f, 1.19540f, 2.56350f),
+      Point3D(0.00010f, -2.56340f, 1.19540f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, 0.68410f, -1.87930f),
+      Point3D(2.00000f, -0.68400f, 1.87940f),
+      Point3D(-2.00000f, -0.68400f, 1.87940f),
+      Point3D(-2.00000f, 0.68410f, -1.87930f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(-0.00000f, -1.19530f, -2.56340f),
+      Point3D(-0.00000f, 2.56350f, -1.19530f),
+      Point3D(0.00010f, 1.19540f, 2.56350f),
+      Point3D(0.00010f, -2.56340f, 1.19540f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, 0.68410f, -1.87930f),
+      Point3D(2.00000f, -0.68400f, 1.87940f),
+      Point3D(-2.00000f, -0.68400f, 1.87940f),
+      Point3D(-2.00000f, 0.68410f, -1.87930f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}
+
+TEST(BSPTree, TwoPlaneIntersectRotate160degrees) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(-0.00000f, 2.00000f, 2.00000f),
+      Point3D(-0.00000f, -2.00000f, 2.00000f),
+      Point3D(0.00010f, -2.00000f, -2.00000f),
+      Point3D(0.00010f, 2.00000f, -2.00000f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, -0.00000f, 2.00000f),
+      Point3D(2.00000f, 0.00010f, -2.00000f),
+      Point3D(-2.00000f, 0.00010f, -2.00000f),
+      Point3D(-2.00000f, -0.00000f, 2.00000f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(2.00000f, -0.00000f, 2.00000f),
+      Point3D(2.00000f, 0.00010f, -2.00000f),
+      Point3D(-2.00000f, 0.00010f, -2.00000f),
+      Point3D(-2.00000f, -0.00000f, 2.00000f)
+    },
+    Polygon3D {
+      Point3D(-0.00000f, 2.00000f, 2.00000f),
+      Point3D(-0.00000f, -2.00000f, 2.00000f),
+      Point3D(0.00010f, -2.00000f, -2.00000f),
+      Point3D(0.00010f, 2.00000f, -2.00000f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}
+
+TEST(BSPTree, TwoPlaneIntersectRotate180degrees) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(-0.00000f, -2.00000f, -2.00000f),
+      Point3D(-0.00000f, 2.00000f, -2.00000f),
+      Point3D(0.00010f, 2.00000f, 2.00000f),
+      Point3D(0.00010f, -2.00000f, 2.00000f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, 0.00010f, -2.00000f),
+      Point3D(2.00000f, -0.00000f, 2.00000f),
+      Point3D(-2.00000f, -0.00000f, 2.00000f),
+      Point3D(-2.00000f, 0.00010f, -2.00000f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(-0.00000f, -2.00000f, -2.00000f),
+      Point3D(-0.00000f, 2.00000f, -2.00000f),
+      Point3D(0.00010f, 2.00000f, 2.00000f),
+      Point3D(0.00010f, -2.00000f, 2.00000f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, 0.00010f, -2.00000f),
+      Point3D(2.00000f, -0.00000f, 2.00000f),
+      Point3D(-2.00000f, -0.00000f, 2.00000f),
+      Point3D(-2.00000f, 0.00010f, -2.00000f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}
+
+TEST(BSPTree, TwoPlaneIntersectRotate200degrees) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(-0.00000f, 1.19540f, 2.56350f),
+      Point3D(-0.00000f, -2.56340f, 1.19540f),
+      Point3D(0.00010f, -1.19530f, -2.56340f),
+      Point3D(0.00010f, 2.56350f, -1.19530f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, -0.68400f, 1.87940f),
+      Point3D(2.00000f, 0.68410f, -1.87930f),
+      Point3D(-2.00000f, 0.68410f, -1.87930f),
+      Point3D(-2.00000f, -0.68400f, 1.87940f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(2.00000f, -0.68400f, 1.87940f),
+      Point3D(2.00000f, 0.68410f, -1.87930f),
+      Point3D(-2.00000f, 0.68410f, -1.87930f),
+      Point3D(-2.00000f, -0.68400f, 1.87940f)
+    },
+    Polygon3D {
+      Point3D(-0.00000f, 1.19540f, 2.56350f),
+      Point3D(-0.00000f, -2.56340f, 1.19540f),
+      Point3D(0.00010f, -1.19530f, -2.56340f),
+      Point3D(0.00010f, 2.56350f, -1.19530f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}
+
+TEST(BSPTree, TwoPlaneIntersectRotate220degrees) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(-0.00000f, 0.73210f, -2.73200f),
+      Point3D(-0.00000f, 2.73210f, 0.73210f),
+      Point3D(0.00010f, -0.73200f, 2.73210f),
+      Point3D(0.00010f, -2.73200f, -0.73200f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, 1.73210f, -0.99990f),
+      Point3D(2.00000f, -1.73200f, 1.00000f),
+      Point3D(-2.00000f, -1.73200f, 1.00000f),
+      Point3D(-2.00000f, 1.73210f, -0.99990f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(-0.00000f, 0.73210f, -2.73200f),
+      Point3D(-0.00000f, 2.73210f, 0.73210f),
+      Point3D(0.00010f, -0.73200f, 2.73210f),
+      Point3D(0.00010f, -2.73200f, -0.73200f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, 1.73210f, -0.99990f),
+      Point3D(2.00000f, -1.73200f, 1.00000f),
+      Point3D(-2.00000f, -1.73200f, 1.00000f),
+      Point3D(-2.00000f, 1.73210f, -0.99990f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}
+
+TEST(BSPTree, TwoPlaneIntersectRotate240degrees) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(-0.00000f, -2.73200f, 0.73210f),
+      Point3D(-0.00000f, -0.73200f, -2.73200f),
+      Point3D(0.00010f, 2.73210f, -0.73200f),
+      Point3D(0.00010f, 0.73210f, 2.73210f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, -1.73200f, -1.00000f),
+      Point3D(2.00000f, 1.73210f, 1.00010f),
+      Point3D(-2.00000f, 1.73210f, 1.00010f),
+      Point3D(-2.00000f, -1.73200f, -1.00000f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(-2.00000f, 1.26793f, 0.73210f),
+      Point3D(-2.00000f, -1.73200f, -1.00000f),
+      Point3D(2.00000f, -1.73200f, -1.00000f),
+      Point3D(2.00000f, 1.26793f, 0.73210f)
+    },
+    Polygon3D {
+      Point3D(-0.00000f, -2.73200f, 0.73210f),
+      Point3D(-0.00000f, -0.73200f, -2.73200f),
+      Point3D(0.00010f, 2.73210f, -0.73200f),
+      Point3D(0.00010f, 0.73210f, 2.73210f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, 1.26793f, 0.73210f),
+      Point3D(2.00000f, 1.73210f, 1.00010f),
+      Point3D(-2.00000f, 1.73210f, 1.00010f),
+      Point3D(-2.00000f, 1.26793f, 0.73210f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}
+
+TEST(BSPTree, TwoPlaneIntersectRotate260degrees) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(-0.00000f, 1.19540f, 2.56350f),
+      Point3D(-0.00000f, -2.56340f, 1.19540f),
+      Point3D(0.00010f, -1.19530f, -2.56340f),
+      Point3D(0.00010f, 2.56350f, -1.19530f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, -0.68400f, 1.87940f),
+      Point3D(2.00000f, 0.68410f, -1.87930f),
+      Point3D(-2.00000f, 0.68410f, -1.87930f),
+      Point3D(-2.00000f, -0.68400f, 1.87940f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(2.00000f, -0.68400f, 1.87940f),
+      Point3D(2.00000f, 0.68410f, -1.87930f),
+      Point3D(-2.00000f, 0.68410f, -1.87930f),
+      Point3D(-2.00000f, -0.68400f, 1.87940f)
+    },
+    Polygon3D {
+      Point3D(-0.00000f, 1.19540f, 2.56350f),
+      Point3D(-0.00000f, -2.56340f, 1.19540f),
+      Point3D(0.00010f, -1.19530f, -2.56340f),
+      Point3D(0.00010f, 2.56350f, -1.19530f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}
+
+TEST(BSPTree, TwoPlaneIntersectRotate280degrees) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(-0.00000f, 2.73210f, -0.73200f),
+      Point3D(-0.00000f, 0.73210f, 2.73210f),
+      Point3D(0.00010f, -2.73200f, 0.73210f),
+      Point3D(0.00010f, -0.73200f, -2.73200f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, 1.73210f, 1.00010f),
+      Point3D(2.00000f, -1.73200f, -1.00000f),
+      Point3D(-2.00000f, -1.73200f, -1.00000f),
+      Point3D(-2.00000f, 1.73210f, 1.00010f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(2.00000f, -1.26783f, -0.73200f),
+      Point3D(2.00000f, -1.73200f, -1.00000f),
+      Point3D(-2.00000f, -1.73200f, -1.00000f),
+      Point3D(-2.00000f, -1.26783f, -0.73200f)
+    },
+    Polygon3D {
+      Point3D(-0.00000f, 2.73210f, -0.73200f),
+      Point3D(-0.00000f, 0.73210f, 2.73210f),
+      Point3D(0.00010f, -2.73200f, 0.73210f),
+      Point3D(0.00010f, -0.73200f, -2.73200f)
+    },
+    Polygon3D {
+      Point3D(-2.00000f, -1.26783f, -0.73200f),
+      Point3D(-2.00000f, 1.73210f, 1.00010f),
+      Point3D(2.00000f, 1.73210f, 1.00010f),
+      Point3D(2.00000f, -1.26783f, -0.73200f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}
+
+TEST(BSPTree, TwoPlaneIntersectRotate300degrees) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(-0.00000f, 0.73210f, -2.73200f),
+      Point3D(-0.00000f, 2.73210f, 0.73210f),
+      Point3D(0.00010f, -0.73200f, 2.73210f),
+      Point3D(0.00010f, -2.73200f, -0.73200f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, 1.73210f, -0.99990f),
+      Point3D(2.00000f, -1.73200f, 1.00000f),
+      Point3D(-2.00000f, -1.73200f, 1.00000f),
+      Point3D(-2.00000f, 1.73210f, -0.99990f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(-0.00000f, 0.73210f, -2.73200f),
+      Point3D(-0.00000f, 2.73210f, 0.73210f),
+      Point3D(0.00010f, -0.73200f, 2.73210f),
+      Point3D(0.00010f, -2.73200f, -0.73200f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, 1.73210f, -0.99990f),
+      Point3D(2.00000f, -1.73200f, 1.00000f),
+      Point3D(-2.00000f, -1.73200f, 1.00000f),
+      Point3D(-2.00000f, 1.73210f, -0.99990f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}
+
+TEST(BSPTree, TwoPlaneIntersectRotate320degrees) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(-0.00000f, -1.19530f, -2.56340f),
+      Point3D(-0.00000f, 2.56350f, -1.19530f),
+      Point3D(0.00010f, 1.19540f, 2.56350f),
+      Point3D(0.00010f, -2.56340f, 1.19540f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, 0.68410f, -1.87930f),
+      Point3D(2.00000f, -0.68400f, 1.87940f),
+      Point3D(-2.00000f, -0.68400f, 1.87940f),
+      Point3D(-2.00000f, 0.68410f, -1.87930f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(-0.00000f, -1.19530f, -2.56340f),
+      Point3D(-0.00000f, 2.56350f, -1.19530f),
+      Point3D(0.00010f, 1.19540f, 2.56350f),
+      Point3D(0.00010f, -2.56340f, 1.19540f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, 0.68410f, -1.87930f),
+      Point3D(2.00000f, -0.68400f, 1.87940f),
+      Point3D(-2.00000f, -0.68400f, 1.87940f),
+      Point3D(-2.00000f, 0.68410f, -1.87930f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}
+
+TEST(BSPTree, TwoPlaneIntersectRotate340degrees) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(-0.00000f, -2.00000f, -2.00000f),
+      Point3D(-0.00000f, 2.00000f, -2.00000f),
+      Point3D(0.00010f, 2.00000f, 2.00000f),
+      Point3D(0.00010f, -2.00000f, 2.00000f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, 0.00010f, -2.00000f),
+      Point3D(2.00000f, -0.00000f, 2.00000f),
+      Point3D(-2.00000f, -0.00000f, 2.00000f),
+      Point3D(-2.00000f, 0.00010f, -2.00000f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(-0.00000f, -2.00000f, -2.00000f),
+      Point3D(-0.00000f, 2.00000f, -2.00000f),
+      Point3D(0.00010f, 2.00000f, 2.00000f),
+      Point3D(0.00010f, -2.00000f, 2.00000f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, 0.00010f, -2.00000f),
+      Point3D(2.00000f, -0.00000f, 2.00000f),
+      Point3D(-2.00000f, -0.00000f, 2.00000f),
+      Point3D(-2.00000f, 0.00010f, -2.00000f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}
+
+TEST(BSPTree, TwoPlaneIntersectRotate360degrees) {
+  const std::deque<Polygon3D> polygons {
+    Polygon3D {
+      Point3D(-0.00000f, -2.00000f, -2.00000f),
+      Point3D(-0.00000f, 2.00000f, -2.00000f),
+      Point3D(0.00010f, 2.00000f, 2.00000f),
+      Point3D(0.00010f, -2.00000f, 2.00000f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, 0.00010f, -2.00000f),
+      Point3D(2.00000f, -0.00000f, 2.00000f),
+      Point3D(-2.00000f, -0.00000f, 2.00000f),
+      Point3D(-2.00000f, 0.00010f, -2.00000f)
+    }
+  };
+
+  const std::deque<Polygon3D> expected {
+    Polygon3D {
+      Point3D(-0.00000f, -2.00000f, -2.00000f),
+      Point3D(-0.00000f, 2.00000f, -2.00000f),
+      Point3D(0.00010f, 2.00000f, 2.00000f),
+      Point3D(0.00010f, -2.00000f, 2.00000f)
+    },
+    Polygon3D {
+      Point3D(2.00000f, 0.00010f, -2.00000f),
+      Point3D(2.00000f, -0.00000f, 2.00000f),
+      Point3D(-2.00000f, -0.00000f, 2.00000f),
+      Point3D(-2.00000f, 0.00010f, -2.00000f)
+    }
+  };
+  ::RunTest(polygons, expected);
+}