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Issue 384083002: WIP BSP Tree for 3D Layer Sorting (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Small fixes to style/formatting, minor cleanup. Created 6 years, 5 months ago
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1 // Copyright 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 #include "cc/output/bsp_compare_result.h"
5 #include "cc/output/bsp_controller.h"
6 #include "cc/quads/draw_polygon.h"
7 #include "ui/gfx/vector3d_f.h"
8
9 namespace cc {
10
11 BspCompareResult BspController::GetNodePositionRelative(
12 const DrawPolygon& node_a,
13 const DrawPolygon& node_b) const {
14 return DrawPolygon::SideCompare(node_a, node_b, compare_threshold_);
15 }
16
17 // The base comparer with 0,0,0 as camera position facing forward
18 ViewCompareResult BspController::GetCameraPositionRelative(
19 const DrawPolygon& node) const {
20 // The dot product figures out if we're behind or in front of the
21 // current DrawPolygon based on its normal and a point from it.
22 if (node.normal.z() >= 0.f)
Ian Vollick 2014/07/16 20:54:32 This is probably a dumb question, but why don't yo
troyhildebrandt 2014/07/18 21:48:25 You're right, done.
23 return IN_FRONT;
24 return BEHIND;
25 }
26
27 bool BspController::SplitPolygon(scoped_ptr<DrawPolygon> polygon,
28 const DrawPolygon& splitter,
29 scoped_ptr<DrawPolygon>* front,
30 scoped_ptr<DrawPolygon>* back) const {
31 return polygon->Split(splitter, split_threshold_, front, back);
32 }
33
34 float BspController::SplitWeight(const DrawPolygon& polygon) {
35 return polygon.area;
36 }
37
38 } // namespace cc
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