/*
 * spheretest.cpp
 *
 *  Created on: Dec 31, 2014
 *      Author: gregor
 */

#include <vector>

#include <glm/glm.hpp>

#include <gtest/gtest.h>

#include "GLTB/geom/sphere.h"

TEST(Sphere, fromTwoPoints)
{
	gltb::Sphere<float> sphere(glm::vec3(0, 1, 0), glm::vec3(0, 1, 1));

	ASSERT_FLOAT_EQ(0, sphere.center.x);
	ASSERT_FLOAT_EQ(1, sphere.center.y);
	ASSERT_FLOAT_EQ(0.5, sphere.center.z);
	ASSERT_FLOAT_EQ(0.5, sphere.radius);
}

TEST(Sphere, fromThreePoints)
{
	gltb::Sphere<float> sphere(glm::vec3(0, 1, 0), glm::vec3(0, 1, 1), glm::vec3(0, 0, 0));

	ASSERT_FLOAT_EQ(0, sphere.center.x);
	ASSERT_FLOAT_EQ(0.5, sphere.center.y);
	ASSERT_FLOAT_EQ(0.5, sphere.center.z);
	ASSERT_FLOAT_EQ(0.5 * sqrt(2), sphere.radius);
}

TEST(Sphere, minimalEnclosingFor2Points)
{
	std::vector<glm::vec3> points;

	points.push_back(glm::vec3(0, 1, 0));
	points.push_back(glm::vec3(0, 1, 1));

	gltb::Sphere<float> sphere(points);

	ASSERT_FLOAT_EQ(0, sphere.center.x);
	ASSERT_FLOAT_EQ(1, sphere.center.y);
	ASSERT_FLOAT_EQ(0.5, sphere.center.z);
	ASSERT_FLOAT_EQ(0.5, sphere.radius);
}

TEST(Sphere, minimalEnclosingFor3Points)
{
	std::vector<glm::vec3> points;

	points.push_back(glm::vec3(0, 1, 0));
	points.push_back(glm::vec3(0, 1, 1));
	points.push_back(glm::vec3(0, 0, 0));

	gltb::Sphere<float> sphere(points);

	ASSERT_FLOAT_EQ(0, sphere.center.x);
	ASSERT_FLOAT_EQ(0.5, sphere.center.y);
	ASSERT_FLOAT_EQ(0.5, sphere.center.z);
	ASSERT_FLOAT_EQ(0.5 * sqrt(2), sphere.radius);
}

TEST(Sphere, minimalEnclosingFor5Points)
{
	std::vector<glm::vec3> points;

	points.push_back(glm::vec3(0, 1, 0));
	points.push_back(glm::vec3(0, 1, 1));
	points.push_back(glm::vec3(0, 0, 0));
	points.push_back(glm::vec3(0, 0, 1));
	points.push_back(glm::vec3(0, 0.5, 0.5));

	gltb::Sphere<float> sphere(points);

	ASSERT_FLOAT_EQ(0, sphere.center.x);
	ASSERT_FLOAT_EQ(0.5, sphere.center.y);
	ASSERT_FLOAT_EQ(0.5, sphere.center.z);
	ASSERT_FLOAT_EQ(0.5 * sqrt(2), sphere.radius);
}

int main(int argc, char *argv[])
{
	::testing::InitGoogleTest(&argc, argv);

	return RUN_ALL_TESTS();
}