#pragma region CPL License
/*
Nuclex Native Framework
Copyright (C) 2002-2015 Nuclex Development Labs

This library is free software; you can redistribute it and/or
modify it under the terms of the IBM Common Public License as
published by the IBM Corporation; either version 1.0 of the
License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
IBM Common Public License for more details.

You should have received a copy of the IBM Common Public
License along with this library
*/
#pragma endregion // CPL License

// If the library is compiled as a DLL, this ensures symbols are exported
#define NUCLEX_GEOMETRY_SOURCE 1

#include "Nuclex/Geometry/Lines/Generators/Segment2Generator.h"
#include <gtest/gtest.h>

namespace Nuclex { namespace Geometry { namespace Lines { namespace Generators {

  // ------------------------------------------------------------------------------------------- //

  TEST(Segment2GeneratorTest, ClosestPointsOnVerticalLineCanBeFound) {
    Segment2<float> segment1(Point2<float>(5.0f, 5.0f), Point2<float>(5.0f, -5.0f));
    EXPECT_EQ(
      Point2<float>(5.0f, -5.0f),
      Segment2Generator<float>::GetClosestPointUpon(segment1, Point2<float>(0.0f, -50.0f))
    );
    EXPECT_EQ(
      Point2<float>(5.0f, 0.0f),
      Segment2Generator<float>::GetClosestPointUpon(segment1, Point2<float>(0.0f, 0.0f))
    );
    EXPECT_EQ(
      Point2<float>(5.0f, 5.0f),
      Segment2Generator<float>::GetClosestPointUpon(segment1, Point2<float>(0.0f, 100.0f))
    );
  }

  // ------------------------------------------------------------------------------------------- //

  TEST(Segment2GeneratorTest, ClosestPointsOnHorizontalLineCanBeFound) {
    Segment2<float> segment1(Point2<float>(-15.0f, 1.0f), Point2<float>(5.0f, 3.0f));
    EXPECT_EQ(
      Point2<float>(-15.0f, 1.0f),
      Segment2Generator<float>::GetClosestPointUpon(segment1, Point2<float>(-20.0f, 5.0f))
    );
    EXPECT_EQ(
      Point2<float>(-5.0f, 2.0f), // Center: -5, 2 ------- orthogonal up --------- -6, 12
      Segment2Generator<float>::GetClosestPointUpon(segment1, Point2<float>(-6.0f, 12.0f))
    );
    EXPECT_EQ(
      Point2<float>(5.0f, 3.0f),
      Segment2Generator<float>::GetClosestPointUpon(segment1, Point2<float>(6.0f, 1.0f))
    );
  }

  // ------------------------------------------------------------------------------------------- //

}}}} // namespace Nuclex::Geometry::Lines::Generators