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#include <gtest/gtest.h>

#include "dart/math/Icosphere.hpp"

#include "TestHelpers.hpp"

using namespace dart;
using namespace math;

//==============================================================================
TEST(IcosphereTests, NumOfVerticesAndTriangles)
{
  const double radius = 5.0;

  for (auto i = 0; i < 8; ++i)
  {
    const auto subdivisions = i;
    const auto icosphere = Icosphered(radius, subdivisions);
    const auto& vertices = icosphere.getVertices();
    const auto& triangles = icosphere.getTriangles();

    EXPECT_EQ(vertices.size(), Icosphered::getNumVertices(subdivisions));
    EXPECT_EQ(triangles.size(), Icosphered::getNumTriangles(subdivisions));

    for (const auto& v : vertices)
    {
      EXPECT_DOUBLE_EQ(v.norm(), radius);
    }
  }
}

//==============================================================================
TEST(IcosphereTests, Constructor)
{
  auto s1 = Icosphered(1, 0);
  EXPECT_FALSE(s1.isEmpty());
  EXPECT_DOUBLE_EQ(s1.getRadius(), 1);
  EXPECT_EQ(s1.getNumSubdivisions(), 0);

  auto s2 = Icosphered(2, 3);
  EXPECT_FALSE(s2.isEmpty());
  EXPECT_DOUBLE_EQ(s2.getRadius(), 2);
  EXPECT_EQ(s2.getNumSubdivisions(), 3);
}
