ui/gfx/geometry/point3_unittest.cc

   1 // Copyright (c) 2012 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 "base/basictypes.h"
   6 #include "testing/gtest/include/gtest/gtest.h"
   7 #include "ui/gfx/geometry/point3_f.h"
   8
   9 namespace gfx {
  10
  11 TEST(Point3Test, VectorArithmetic) {
  12   gfx::Point3F a(1.6f, 5.1f, 3.2f);
  13   gfx::Vector3dF v1(3.1f, -3.2f, 9.3f);
  14   gfx::Vector3dF v2(-8.1f, 1.2f, 3.3f);
  15
  16   static const struct {
  17     gfx::Point3F expected;
  18     gfx::Point3F actual;
  19   } tests[] = {
  20     { gfx::Point3F(4.7f, 1.9f, 12.5f), a + v1 },
  21     { gfx::Point3F(-1.5f, 8.3f, -6.1f), a - v1 },
  22     { a, a - v1 + v1 },
  23     { a, a + v1 - v1 },
  24     { a, a + gfx::Vector3dF() },
  25     { gfx::Point3F(12.8f, 0.7f, 9.2f), a + v1 - v2 },
  26     { gfx::Point3F(-9.6f, 9.5f, -2.8f), a - v1 + v2 }
  27   };
  28
  29   for (size_t i = 0; i < arraysize(tests); ++i)
  30     EXPECT_EQ(tests[i].expected.ToString(),
  31               tests[i].actual.ToString());
  32
  33   a += v1;
  34   EXPECT_EQ(Point3F(4.7f, 1.9f, 12.5f).ToString(), a.ToString());
  35
  36   a -= v2;
  37   EXPECT_EQ(Point3F(12.8f, 0.7f, 9.2f).ToString(), a.ToString());
  38 }
  39
  40 TEST(Point3Test, VectorFromPoints) {
  41   gfx::Point3F a(1.6f, 5.2f, 3.2f);
  42   gfx::Vector3dF v1(3.1f, -3.2f, 9.3f);
  43
  44   gfx::Point3F b(a + v1);
  45   EXPECT_EQ((b - a).ToString(), v1.ToString());
  46 }
  47
  48 TEST(Point3Test, Scale) {
  49   EXPECT_EQ(Point3F().ToString(), ScalePoint(Point3F(), 2.f).ToString());
  50   EXPECT_EQ(Point3F().ToString(),
  51             ScalePoint(Point3F(), 2.f, 2.f, 2.f).ToString());
  52
  53   EXPECT_EQ(Point3F(2.f, -2.f, 4.f).ToString(),
  54             ScalePoint(Point3F(1.f, -1.f, 2.f), 2.f).ToString());
  55   EXPECT_EQ(Point3F(2.f, -3.f, 8.f).ToString(),
  56             ScalePoint(Point3F(1.f, -1.f, 2.f), 2.f, 3.f, 4.f).ToString());
  57
  58   Point3F zero;
  59   zero.Scale(2.f);
  60   zero.Scale(6.f, 3.f, 1.5f);
  61   EXPECT_EQ(Point3F().ToString(), zero.ToString());
  62
  63   Point3F point(1.f, -1.f, 2.f);
  64   point.Scale(2.f);
  65   point.Scale(6.f, 3.f, 1.5f);
  66   EXPECT_EQ(Point3F(12.f, -6.f, 6.f).ToString(), point.ToString());
  67 }
  68
  69 }  // namespace gfx