ui/gfx/box_f.cc

   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
   5 #include "ui/gfx/box_f.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/logging.h"
  10 #include "base/strings/stringprintf.h"
  11
  12 namespace gfx {
  13
  14 std::string BoxF::ToString() const {
  15   return base::StringPrintf("%s %fx%fx%f",
  16                             origin().ToString().c_str(),
  17                             width_,
  18                             height_,
  19                             depth_);
  20 }
  21
  22 bool BoxF::IsEmpty() const {
  23   return (width_ == 0 && height_ == 0) ||
  24          (width_ == 0 && depth_ == 0) ||
  25          (height_ == 0 && depth_ == 0);
  26 }
  27
  28 void BoxF::ExpandTo(const Point3F& min, const Point3F& max) {
  29   DCHECK_LE(min.x(), max.x());
  30   DCHECK_LE(min.y(), max.y());
  31   DCHECK_LE(min.z(), max.z());
  32
  33   float min_x = std::min(x(), min.x());
  34   float min_y = std::min(y(), min.y());
  35   float min_z = std::min(z(), min.z());
  36   float max_x = std::max(right(), max.x());
  37   float max_y = std::max(bottom(), max.y());
  38   float max_z = std::max(front(), max.z());
  39
  40   origin_.SetPoint(min_x, min_y, min_z);
  41   width_ = max_x - min_x;
  42   height_ = max_y - min_y;
  43   depth_ = max_z - min_z;
  44 }
  45
  46 void BoxF::Union(const BoxF& box) {
  47   if (IsEmpty()) {
  48     *this = box;
  49     return;
  50   }
  51   if (box.IsEmpty())
  52     return;
  53
  54   ExpandTo(box.origin(), gfx::Point3F(box.right(), box.bottom(), box.front()));
  55 }
  56
  57 void BoxF::ExpandTo(const Point3F& point) {
  58   ExpandTo(point, point);
  59 }
  60
  61 BoxF UnionBoxes(const BoxF& a, const BoxF& b) {
  62   BoxF result = a;
  63   result.Union(b);
  64   return result;
  65 }
  66
  67 }  // namespace gfx