godot/tests/test_aabb.h

/*************************************************************************/
/*  test_aabb.h                                                          */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/

#ifndef TEST_AABB_H
#define TEST_AABB_H

#include "core/math/aabb.h"
#include "core/string/print_string.h"
#include "tests/test_macros.h"

#include "thirdparty/doctest/doctest.h"

namespace TestAABB {

TEST_CASE("[AABB] Constructor methods") {
	const AABB aabb = AABB(Vector3(-1.5, 2, -2.5), Vector3(4, 5, 6));
	const AABB aabb_copy = AABB(aabb);

	CHECK_MESSAGE(
			aabb == aabb_copy,
			"AABBs created with the same dimensions but by different methods should be equal.");
}

TEST_CASE("[AABB] String conversion") {
	CHECK_MESSAGE(
			String(AABB(Vector3(-1.5, 2, -2.5), Vector3(4, 5, 6))) == "-1.5, 2, -2.5 - 4, 5, 6",
			"The string representation shouild match the expected value.");
}

TEST_CASE("[AABB] Basic getters") {
	const AABB aabb = AABB(Vector3(-1.5, 2, -2.5), Vector3(4, 5, 6));
	CHECK_MESSAGE(
			aabb.get_position().is_equal_approx(Vector3(-1.5, 2, -2.5)),
			"get_position() should return the expected value.");
	CHECK_MESSAGE(
			aabb.get_size().is_equal_approx(Vector3(4, 5, 6)),
			"get_size() should return the expected value.");
	CHECK_MESSAGE(
			aabb.get_end().is_equal_approx(Vector3(2.5, 7, 3.5)),
			"get_end() should return the expected value.");
}

TEST_CASE("[AABB] Basic setters") {
	AABB aabb = AABB(Vector3(-1.5, 2, -2.5), Vector3(4, 5, 6));
	aabb.set_end(Vector3(100, 0, 100));
	CHECK_MESSAGE(
			aabb.is_equal_approx(AABB(Vector3(-1.5, 2, -2.5), Vector3(101.5, -2, 102.5))),
			"set_end() should result in the expected AABB.");

	aabb = AABB(Vector3(-1.5, 2, -2.5), Vector3(4, 5, 6));
	aabb.set_position(Vector3(-1000, -2000, -3000));
	CHECK_MESSAGE(
			aabb.is_equal_approx(AABB(Vector3(-1000, -2000, -3000), Vector3(4, 5, 6))),
			"set_position() should result in the expected AABB.");

	aabb = AABB(Vector3(-1.5, 2, -2.5), Vector3(4, 5, 6));
	aabb.set_size(Vector3(0, 0, -50));
	CHECK_MESSAGE(
			aabb.is_equal_approx(AABB(Vector3(-1.5, 2, -2.5), Vector3(0, 0, -50))),
			"set_size() should result in the expected AABB.");
}

TEST_CASE("[AABB] Area getters") {
	AABB aabb = AABB(Vector3(-1.5, 2, -2.5), Vector3(4, 5, 6));
	CHECK_MESSAGE(
			Math::is_equal_approx(aabb.get_area(), 120),
			"get_area() should return the expected value with positive size.");
	CHECK_MESSAGE(
			!aabb.has_no_area(),
			"Non-empty volumetric AABB should have an area.");

	aabb = AABB(Vector3(-1.5, 2, -2.5), Vector3(-4, 5, 6));
	CHECK_MESSAGE(
			Math::is_equal_approx(aabb.get_area(), -120),
			"get_area() should return the expected value with negative size (1 component).");

	aabb = AABB(Vector3(-1.5, 2, -2.5), Vector3(-4, -5, 6));
	CHECK_MESSAGE(
			Math::is_equal_approx(aabb.get_area(), 120),
			"get_area() should return the expected value with negative size (2 components).");

	aabb = AABB(Vector3(-1.5, 2, -2.5), Vector3(-4, -5, -6));
	CHECK_MESSAGE(
			Math::is_equal_approx(aabb.get_area(), -120),
			"get_area() should return the expected value with negative size (3 components).");

	aabb = AABB(Vector3(-1.5, 2, -2.5), Vector3(4, 0, 6));
	CHECK_MESSAGE(
			aabb.has_no_area(),
			"Non-empty flat AABB should not have an area.");

	CHECK_MESSAGE(
			AABB().has_no_area(),
			"Empty AABB should not have an area.");
}

TEST_CASE("[AABB] Surface getters") {
	AABB aabb = AABB(Vector3(-1.5, 2, -2.5), Vector3(4, 5, 6));
	CHECK_MESSAGE(
			!aabb.has_no_surface(),
			"Non-empty volumetric AABB should have an surface.");

	aabb = AABB(Vector3(-1.5, 2, -2.5), Vector3(4, 0, 6));
	CHECK_MESSAGE(
			!aabb.has_no_surface(),
			"Non-empty flat AABB should have a surface.");

	CHECK_MESSAGE(
			AABB().has_no_surface(),
			"Empty AABB should not have an surface.");
}

TEST_CASE("[AABB] Intersection") {
	const AABB aabb_big = AABB(Vector3(-1.5, 2, -2.5), Vector3(4, 5, 6));

	AABB aabb_small = AABB(Vector3(-1.5, 2, -2.5), Vector3(1, 1, 1));
	CHECK_MESSAGE(
			aabb_big.intersects(aabb_small),
			"intersects() with fully contained AABB (touching the edge) should return the expected result.");

	aabb_small = AABB(Vector3(0.5, 1.5, -2), Vector3(1, 1, 1));
	CHECK_MESSAGE(
			aabb_big.intersects(aabb_small),
			"intersects() with partially contained AABB (overflowing on Y axis) should return the expected result.");

	aabb_small = AABB(Vector3(10, -10, -10), Vector3(1, 1, 1));
	CHECK_MESSAGE(
			!aabb_big.intersects(aabb_small),
			"intersects() with non-contained AABB should return the expected result.");

	aabb_small = AABB(Vector3(-1.5, 2, -2.5), Vector3(1, 1, 1));
	CHECK_MESSAGE(
			aabb_big.intersection(aabb_small).is_equal_approx(aabb_small),
			"intersection() with fully contained AABB (touching the edge) should return the expected result.");

	aabb_small = AABB(Vector3(0.5, 1.5, -2), Vector3(1, 1, 1));
	CHECK_MESSAGE(
			aabb_big.intersection(aabb_small).is_equal_approx(AABB(Vector3(0.5, 2, -2), Vector3(1, 0.5, 1))),
			"intersection() with partially contained AABB (overflowing on Y axis) should return the expected result.");

	aabb_small = AABB(Vector3(10, -10, -10), Vector3(1, 1, 1));
	CHECK_MESSAGE(
			aabb_big.intersection(aabb_small).is_equal_approx(AABB()),
			"intersection() with non-contained AABB should return the expected result.");

	CHECK_MESSAGE(
			aabb_big.intersects_plane(Plane(Vector3(0, 1, 0), 4)),
			"intersects_plane() should return the expected result.");
	CHECK_MESSAGE(
			aabb_big.intersects_plane(Plane(Vector3(0, -1, 0), -4)),
			"intersects_plane() should return the expected result.");
	CHECK_MESSAGE(
			!aabb_big.intersects_plane(Plane(Vector3(0, 1, 0), 200)),
			"intersects_plane() should return the expected result.");

	CHECK_MESSAGE(
			aabb_big.intersects_segment(Vector3(1, 3, 0), Vector3(0, 3, 0)),
			"intersects_segment() should return the expected result.");
	CHECK_MESSAGE(
			aabb_big.intersects_segment(Vector3(0, 3, 0), Vector3(0, -300, 0)),
			"intersects_segment() should return the expected result.");
	CHECK_MESSAGE(
			aabb_big.intersects_segment(Vector3(-50, 3, -50), Vector3(50, 3, 50)),
			"intersects_segment() should return the expected result.");
	CHECK_MESSAGE(
			!aabb_big.intersects_segment(Vector3(-50, 25, -50), Vector3(50, 25, 50)),
			"intersects_segment() should return the expected result.");
	CHECK_MESSAGE(
			aabb_big.intersects_segment(Vector3(0, 3, 0), Vector3(0, 3, 0)),
			"intersects_segment() should return the expected result with segment of length 0.");
	CHECK_MESSAGE(
			!aabb_big.intersects_segment(Vector3(0, 300, 0), Vector3(0, 300, 0)),
			"intersects_segment() should return the expected result with segment of length 0.");
}

TEST_CASE("[AABB] Merging") {
	const AABB aabb_big = AABB(Vector3(-1.5, 2, -2.5), Vector3(4, 5, 6));

	AABB aabb_small = AABB(Vector3(-1.5, 2, -2.5), Vector3(1, 1, 1));
	CHECK_MESSAGE(
			aabb_big.merge(aabb_small).is_equal_approx(aabb_big),
			"merge() with fully contained AABB (touching the edge) should return the expected result.");

	aabb_small = AABB(Vector3(0.5, 1.5, -2), Vector3(1, 1, 1));
	CHECK_MESSAGE(
			aabb_big.merge(aabb_small).is_equal_approx(AABB(Vector3(-1.5, 1.5, -2.5), Vector3(4, 5.5, 6))),
			"merge() with partially contained AABB (overflowing on Y axis) should return the expected result.");

	aabb_small = AABB(Vector3(10, -10, -10), Vector3(1, 1, 1));
	CHECK_MESSAGE(
			aabb_big.merge(aabb_small).is_equal_approx(AABB(Vector3(-1.5, -10, -10), Vector3(12.5, 17, 13.5))),
			"merge() with non-contained AABB should return the expected result.");
}

TEST_CASE("[AABB] Encloses") {
	const AABB aabb_big = AABB(Vector3(-1.5, 2, -2.5), Vector3(4, 5, 6));

	AABB aabb_small = AABB(Vector3(-1.5, 2, -2.5), Vector3(1, 1, 1));
	CHECK_MESSAGE(
			aabb_big.encloses(aabb_small),
			"encloses() with fully contained AABB (touching the edge) should return the expected result.");

	aabb_small = AABB(Vector3(0.5, 1.5, -2), Vector3(1, 1, 1));
	CHECK_MESSAGE(
			!aabb_big.encloses(aabb_small),
			"encloses() with partially contained AABB (overflowing on Y axis) should return the expected result.");

	aabb_small = AABB(Vector3(10, -10, -10), Vector3(1, 1, 1));
	CHECK_MESSAGE(
			!aabb_big.encloses(aabb_small),
			"encloses() with non-contained AABB should return the expected result.");
}

TEST_CASE("[AABB] Get endpoints") {
	const AABB aabb = AABB(Vector3(-1.5, 2, -2.5), Vector3(4, 5, 6));
	CHECK_MESSAGE(
			aabb.get_endpoint(0).is_equal_approx(Vector3(-1.5, 2, -2.5)),
			"The endpoint at index 0 should match the expected value.");
	CHECK_MESSAGE(
			aabb.get_endpoint(1).is_equal_approx(Vector3(-1.5, 2, 3.5)),
			"The endpoint at index 1 should match the expected value.");
	CHECK_MESSAGE(
			aabb.get_endpoint(2).is_equal_approx(Vector3(-1.5, 7, -2.5)),
			"The endpoint at index 2 should match the expected value.");
	CHECK_MESSAGE(
			aabb.get_endpoint(3).is_equal_approx(Vector3(-1.5, 7, 3.5)),
			"The endpoint at index 3 should match the expected value.");
	CHECK_MESSAGE(
			aabb.get_endpoint(4).is_equal_approx(Vector3(2.5, 2, -2.5)),
			"The endpoint at index 4 should match the expected value.");
	CHECK_MESSAGE(
			aabb.get_endpoint(5).is_equal_approx(Vector3(2.5, 2, 3.5)),
			"The endpoint at index 5 should match the expected value.");
	CHECK_MESSAGE(
			aabb.get_endpoint(6).is_equal_approx(Vector3(2.5, 7, -2.5)),
			"The endpoint at index 6 should match the expected value.");
	CHECK_MESSAGE(
			aabb.get_endpoint(7).is_equal_approx(Vector3(2.5, 7, 3.5)),
			"The endpoint at index 7 should match the expected value.");

	ERR_PRINT_OFF;
	CHECK_MESSAGE(
			aabb.get_endpoint(8).is_equal_approx(Vector3()),
			"The endpoint at invalid index 8 should match the expected value.");
	CHECK_MESSAGE(
			aabb.get_endpoint(-1).is_equal_approx(Vector3()),
			"The endpoint at invalid index -1 should match the expected value.");
	ERR_PRINT_ON;
}

TEST_CASE("[AABB] Get longest/shortest axis") {
	const AABB aabb = AABB(Vector3(-1.5, 2, -2.5), Vector3(4, 5, 6));
	CHECK_MESSAGE(
			aabb.get_longest_axis().is_equal_approx(Vector3(0, 0, 1)),
			"get_longest_axis() should return the expected value.");
	CHECK_MESSAGE(
			aabb.get_longest_axis_index() == Vector3::AXIS_Z,
			"get_longest_axis() should return the expected value.");
	CHECK_MESSAGE(
			Math::is_equal_approx(aabb.get_longest_axis_size(), 6),
			"get_longest_axis() should return the expected value.");

	CHECK_MESSAGE(
			aabb.get_shortest_axis().is_equal_approx(Vector3(1, 0, 0)),
			"get_shortest_axis() should return the expected value.");
	CHECK_MESSAGE(
			aabb.get_shortest_axis_index() == Vector3::AXIS_X,
			"get_shortest_axis() should return the expected value.");
	CHECK_MESSAGE(
			Math::is_equal_approx(aabb.get_shortest_axis_size(), 4),
			"get_shortest_axis() should return the expected value.");
}

#ifndef _MSC_VER
#warning Support tests need to be re-done
#endif

/* Support function was actually broken. As it was fixed, the tests now fail. Tests need to be re-done.

TEST_CASE("[AABB] Get support") {
	const AABB aabb = AABB(Vector3(-1.5, 2, -2.5), Vector3(4, 5, 6));
	CHECK_MESSAGE(
			aabb.get_support(Vector3(1, 0, 0)).is_equal_approx(Vector3(-1.5, 7, 3.5)),
			"get_support() should return the expected value.");
	CHECK_MESSAGE(
			aabb.get_support(Vector3(0.5, 1, 0)).is_equal_approx(Vector3(-1.5, 2, 3.5)),
			"get_support() should return the expected value.");
	CHECK_MESSAGE(
			aabb.get_support(Vector3(0.5, 1, -400)).is_equal_approx(Vector3(-1.5, 2, 3.5)),
			"get_support() should return the expected value.");
	CHECK_MESSAGE(
			aabb.get_support(Vector3(0, -1, 0)).is_equal_approx(Vector3(2.5, 7, 3.5)),
			"get_support() should return the expected value.");
	CHECK_MESSAGE(
			aabb.get_support(Vector3(0, -0.1, 0)).is_equal_approx(Vector3(2.5, 7, 3.5)),
			"get_support() should return the expected value.");
	CHECK_MESSAGE(
			aabb.get_support(Vector3()).is_equal_approx(Vector3(2.5, 7, 3.5)),
			"get_support() should return the expected value with a null vector.");
}
*/
TEST_CASE("[AABB] Grow") {
	const AABB aabb = AABB(Vector3(-1.5, 2, -2.5), Vector3(4, 5, 6));
	CHECK_MESSAGE(
			aabb.grow(0.25).is_equal_approx(AABB(Vector3(-1.75, 1.75, -2.75), Vector3(4.5, 5.5, 6.5))),
			"grow() with positive value should return the expected AABB.");
	CHECK_MESSAGE(
			aabb.grow(-0.25).is_equal_approx(AABB(Vector3(-1.25, 2.25, -2.25), Vector3(3.5, 4.5, 5.5))),
			"grow() with negative value should return the expected AABB.");
	CHECK_MESSAGE(
			aabb.grow(-10).is_equal_approx(AABB(Vector3(8.5, 12, 7.5), Vector3(-16, -15, -14))),
			"grow() with large negative value should return the expected AABB.");
}

TEST_CASE("[AABB] Has point") {
	const AABB aabb = AABB(Vector3(-1.5, 2, -2.5), Vector3(4, 5, 6));
	CHECK_MESSAGE(
			aabb.has_point(Vector3(-1, 3, 0)),
			"has_point() with contained point should return the expected value.");
	CHECK_MESSAGE(
			aabb.has_point(Vector3(2, 3, 0)),
			"has_point() with contained point should return the expected value.");
	CHECK_MESSAGE(
			aabb.has_point(Vector3(-1.5, 3, 0)),
			"has_point() with contained point on negative edge should return the expected value.");
	CHECK_MESSAGE(
			aabb.has_point(Vector3(2.5, 3, 0)),
			"has_point() with contained point on positive edge should return the expected value.");
	CHECK_MESSAGE(
			!aabb.has_point(Vector3(-20, 0, 0)),
			"has_point() with non-contained point should return the expected value.");
}

TEST_CASE("[AABB] Expanding") {
	const AABB aabb = AABB(Vector3(-1.5, 2, -2.5), Vector3(4, 5, 6));
	CHECK_MESSAGE(
			aabb.expand(Vector3(-1, 3, 0)).is_equal_approx(aabb),
			"expand() with contained point should return the expected AABB.");
	CHECK_MESSAGE(
			aabb.expand(Vector3(2, 3, 0)).is_equal_approx(aabb),
			"expand() with contained point should return the expected AABB.");
	CHECK_MESSAGE(
			aabb.expand(Vector3(-1.5, 3, 0)).is_equal_approx(aabb),
			"expand() with contained point on negative edge should return the expected AABB.");
	CHECK_MESSAGE(
			aabb.expand(Vector3(2.5, 3, 0)).is_equal_approx(aabb),
			"expand() with contained point on positive edge should return the expected AABB.");
	CHECK_MESSAGE(
			aabb.expand(Vector3(-20, 0, 0)).is_equal_approx(AABB(Vector3(-20, 0, -2.5), Vector3(22.5, 7, 6))),
			"expand() with non-contained point should return the expected AABB.");
}
} // namespace TestAABB

#endif // TEST_AABB_H