Index: cc/output/bsp_controller.cc |
diff --git a/cc/output/bsp_controller.cc b/cc/output/bsp_controller.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..a5b6bb283c5fd379e675138bf6bf59615865b3ff |
--- /dev/null |
+++ b/cc/output/bsp_controller.cc |
@@ -0,0 +1,47 @@ |
+// Copyright 2013 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+#include "cc/output/bsp_compare_result.h" |
+#include "cc/output/bsp_controller.h" |
+#include "cc/quads/draw_polygon.h" |
+#include "ui/gfx/vector3d_f.h" |
+ |
+namespace cc { |
+ |
+BspController::BspController() { |
+} |
+ |
+static gfx::Point3F camera_point(0.0f, 0.0f, 0.0f); |
Ian Vollick
2014/07/19 00:45:01
I think that this counts as a static initializer,
troyhildebrandt
2014/07/21 19:16:50
Done.
|
+float BspController::compare_threshold = 1.0f; |
+float BspController::split_threshold = 0.5f; |
+ |
+BspCompareResult BspController::GetNodePositionRelative( |
+ const DrawPolygon& node_a, |
+ const DrawPolygon& node_b) { |
+ return DrawPolygon::SideCompare(node_a, node_b, compare_threshold); |
+} |
+ |
+// The base comparer with 0,0,0 as camera position facing forward |
+BspCompareResult BspController::GetCameraPositionRelative( |
+ const DrawPolygon& node) { |
+ // The dot product figures out if we're behind or in front of the |
+ // current DrawPolygon based on its normal and a point from it. |
+ gfx::Vector3dF camera_minus_point_on_plane = camera_point - node.points[0]; |
+ if (gfx::DotProduct(camera_minus_point_on_plane, node.normal) > 0.0f) { |
+ return BSP_FRONT; |
+ } |
+ return BSP_BACK; |
+} |
+ |
+bool BspController::SplitPolygon(scoped_ptr<DrawPolygon> polygon, |
+ const DrawPolygon& splitter, |
+ scoped_ptr<DrawPolygon>* front, |
+ scoped_ptr<DrawPolygon>* back) { |
+ return polygon->Split(splitter, split_threshold, front, back); |
+} |
+ |
+float BspController::SplitWeight(const DrawPolygon& polygon) { |
+ return polygon.area; |
+} |
+ |
+} // namespace cc |