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godot/tests/core/math/test_math_funcs.h

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/**************************************************************************/
/* test_math_funcs.h */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* 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_MATH_FUNCS_H
#define TEST_MATH_FUNCS_H
#include "tests/test_macros.h"
namespace TestMath {
TEST_CASE("[Math] C++ macros") {
CHECK(MIN(-2, 2) == -2);
CHECK(MIN(600, 2) == 2);
CHECK(MAX(-2, 2) == 2);
CHECK(MAX(600, 2) == 600);
CHECK(CLAMP(600, -2, 2) == 2);
CHECK(CLAMP(620, 600, 650) == 620);
// `max` is lower than `min`.
CHECK(CLAMP(620, 600, 50) == 50);
CHECK(ABS(-5) == 5);
CHECK(ABS(0) == 0);
CHECK(ABS(5) == 5);
CHECK(SIGN(-5) == -1.0);
CHECK(SIGN(0) == 0.0);
CHECK(SIGN(5) == 1.0);
// Check that SIGN(NAN) returns 0.0.
CHECK(SIGN(NAN) == 0.0);
}
TEST_CASE("[Math] Power of two functions") {
CHECK(next_power_of_2(0) == 0);
CHECK(next_power_of_2(1) == 1);
CHECK(next_power_of_2(16) == 16);
CHECK(next_power_of_2(17) == 32);
CHECK(next_power_of_2(65535) == 65536);
CHECK(previous_power_of_2(0) == 0);
CHECK(previous_power_of_2(1) == 1);
CHECK(previous_power_of_2(16) == 16);
CHECK(previous_power_of_2(17) == 16);
CHECK(previous_power_of_2(65535) == 32768);
CHECK(closest_power_of_2(0) == 0);
CHECK(closest_power_of_2(1) == 1);
CHECK(closest_power_of_2(16) == 16);
CHECK(closest_power_of_2(17) == 16);
CHECK(closest_power_of_2(65535) == 65536);
CHECK(get_shift_from_power_of_2(0) == -1);
CHECK(get_shift_from_power_of_2(1) == 0);
CHECK(get_shift_from_power_of_2(16) == 4);
CHECK(get_shift_from_power_of_2(17) == -1);
CHECK(get_shift_from_power_of_2(65535) == -1);
CHECK(nearest_shift(0) == 0);
CHECK(nearest_shift(1) == 1);
CHECK(nearest_shift(16) == 5);
CHECK(nearest_shift(17) == 5);
CHECK(nearest_shift(65535) == 16);
}
TEST_CASE_TEMPLATE("[Math] abs", T, int, float, double) {
CHECK(Math::abs((T)-1) == (T)1);
CHECK(Math::abs((T)0) == (T)0);
CHECK(Math::abs((T)1) == (T)1);
CHECK(Math::abs((T)0.1) == (T)0.1);
}
TEST_CASE_TEMPLATE("[Math] round/floor/ceil", T, float, double) {
CHECK(Math::round((T)1.5) == (T)2.0);
CHECK(Math::round((T)1.6) == (T)2.0);
CHECK(Math::round((T)-1.5) == (T)-2.0);
CHECK(Math::round((T)-1.1) == (T)-1.0);
CHECK(Math::floor((T)1.5) == (T)1.0);
CHECK(Math::floor((T)-1.5) == (T)-2.0);
CHECK(Math::ceil((T)1.5) == (T)2.0);
CHECK(Math::ceil((T)-1.9) == (T)-1.0);
}
TEST_CASE_TEMPLATE("[Math] sin/cos/tan", T, float, double) {
CHECK(Math::sin((T)-0.1) == doctest::Approx((T)-0.0998334166));
CHECK(Math::sin((T)0.1) == doctest::Approx((T)0.0998334166));
CHECK(Math::sin((T)0.5) == doctest::Approx((T)0.4794255386));
CHECK(Math::sin((T)1.0) == doctest::Approx((T)0.8414709848));
CHECK(Math::sin((T)1.5) == doctest::Approx((T)0.9974949866));
CHECK(Math::sin((T)450.0) == doctest::Approx((T)-0.683283725));
CHECK(Math::cos((T)-0.1) == doctest::Approx((T)0.99500416530));
CHECK(Math::cos((T)0.1) == doctest::Approx((T)0.9950041653));
CHECK(Math::cos((T)0.5) == doctest::Approx((T)0.8775825619));
CHECK(Math::cos((T)1.0) == doctest::Approx((T)0.5403023059));
CHECK(Math::cos((T)1.5) == doctest::Approx((T)0.0707372017));
CHECK(Math::cos((T)450.0) == doctest::Approx((T)-0.7301529642));
CHECK(Math::tan((T)-0.1) == doctest::Approx((T)-0.1003346721));
CHECK(Math::tan((T)0.1) == doctest::Approx((T)0.1003346721));
CHECK(Math::tan((T)0.5) == doctest::Approx((T)0.5463024898));
CHECK(Math::tan((T)1.0) == doctest::Approx((T)1.5574077247));
CHECK(Math::tan((T)1.5) == doctest::Approx((T)14.1014199472));
CHECK(Math::tan((T)450.0) == doctest::Approx((T)0.9358090134));
}
TEST_CASE_TEMPLATE("[Math] sinh/cosh/tanh", T, float, double) {
CHECK(Math::sinh((T)-0.1) == doctest::Approx((T)-0.10016675));
CHECK(Math::sinh((T)0.1) == doctest::Approx((T)0.10016675));
CHECK(Math::sinh((T)0.5) == doctest::Approx((T)0.5210953055));
CHECK(Math::sinh((T)1.0) == doctest::Approx((T)1.1752011936));
CHECK(Math::sinh((T)1.5) == doctest::Approx((T)2.1292794551));
CHECK(Math::cosh((T)-0.1) == doctest::Approx((T)1.0050041681));
CHECK(Math::cosh((T)0.1) == doctest::Approx((T)1.0050041681));
CHECK(Math::cosh((T)0.5) == doctest::Approx((T)1.1276259652));
CHECK(Math::cosh((T)1.0) == doctest::Approx((T)1.5430806348));
CHECK(Math::cosh((T)1.5) == doctest::Approx((T)2.3524096152));
CHECK(Math::tanh((T)-0.1) == doctest::Approx((T)-0.0996679946));
CHECK(Math::tanh((T)0.1) == doctest::Approx((T)0.0996679946));
CHECK(Math::tanh((T)0.5) == doctest::Approx((T)0.4621171573));
CHECK(Math::tanh((T)1.0) == doctest::Approx((T)0.761594156));
CHECK(Math::tanh((T)1.5) == doctest::Approx((T)0.9051482536));
CHECK(Math::tanh((T)450.0) == doctest::Approx((T)1.0));
}
TEST_CASE_TEMPLATE("[Math] asin/acos/atan", T, float, double) {
CHECK(Math::asin((T)-0.1) == doctest::Approx((T)-0.1001674212));
CHECK(Math::asin((T)0.1) == doctest::Approx((T)0.1001674212));
CHECK(Math::asin((T)0.5) == doctest::Approx((T)0.5235987756));
CHECK(Math::asin((T)1.0) == doctest::Approx((T)1.5707963268));
CHECK(Math::asin((T)2.0) == doctest::Approx((T)1.5707963268));
CHECK(Math::asin((T)-2.0) == doctest::Approx((T)-1.5707963268));
CHECK(Math::acos((T)-0.1) == doctest::Approx((T)1.670963748));
CHECK(Math::acos((T)0.1) == doctest::Approx((T)1.4706289056));
CHECK(Math::acos((T)0.5) == doctest::Approx((T)1.0471975512));
CHECK(Math::acos((T)1.0) == doctest::Approx((T)0.0));
CHECK(Math::acos((T)2.0) == doctest::Approx((T)0.0));
CHECK(Math::acos((T)-2.0) == doctest::Approx((T)Math_PI));
CHECK(Math::atan((T)-0.1) == doctest::Approx((T)-0.0996686525));
CHECK(Math::atan((T)0.1) == doctest::Approx((T)0.0996686525));
CHECK(Math::atan((T)0.5) == doctest::Approx((T)0.463647609));
CHECK(Math::atan((T)1.0) == doctest::Approx((T)0.7853981634));
CHECK(Math::atan((T)1.5) == doctest::Approx((T)0.9827937232));
CHECK(Math::atan((T)450.0) == doctest::Approx((T)1.5685741082));
}
TEST_CASE_TEMPLATE("[Math] asinh/acosh/atanh", T, float, double) {
CHECK(Math::asinh((T)-2.0) == doctest::Approx((T)-1.4436354751));
CHECK(Math::asinh((T)-0.1) == doctest::Approx((T)-0.0998340788));
CHECK(Math::asinh((T)0.1) == doctest::Approx((T)0.0998340788));
CHECK(Math::asinh((T)0.5) == doctest::Approx((T)0.4812118250));
CHECK(Math::asinh((T)1.0) == doctest::Approx((T)0.8813735870));
CHECK(Math::asinh((T)2.0) == doctest::Approx((T)1.4436354751));
CHECK(Math::acosh((T)-2.0) == doctest::Approx((T)0.0));
CHECK(Math::acosh((T)-0.1) == doctest::Approx((T)0.0));
CHECK(Math::acosh((T)0.1) == doctest::Approx((T)0.0));
CHECK(Math::acosh((T)0.5) == doctest::Approx((T)0.0));
CHECK(Math::acosh((T)1.0) == doctest::Approx((T)0.0));
CHECK(Math::acosh((T)2.0) == doctest::Approx((T)1.3169578969));
CHECK(Math::acosh((T)450.0) == doctest::Approx((T)6.8023935287));
CHECK(Math::is_inf(Math::atanh((T)-2.0)));
CHECK(Math::atanh((T)-2.0) < (T)0.0);
CHECK(Math::is_inf(Math::atanh((T)-1.0)));
CHECK(Math::atanh((T)-1.0) < (T)0.0);
CHECK(Math::atanh((T)-0.1) == doctest::Approx((T)-0.1003353477));
CHECK(Math::atanh((T)0.1) == doctest::Approx((T)0.1003353477));
CHECK(Math::atanh((T)0.5) == doctest::Approx((T)0.5493061443));
CHECK(Math::is_inf(Math::atanh((T)1.0)));
CHECK(Math::atanh((T)1.0) > (T)0.0);
CHECK(Math::is_inf(Math::atanh((T)1.5)));
CHECK(Math::atanh((T)1.5) > (T)0.0);
CHECK(Math::is_inf(Math::atanh((T)450.0)));
CHECK(Math::atanh((T)450.0) > (T)0.0);
}
TEST_CASE_TEMPLATE("[Math] sinc/sincn/atan2", T, float, double) {
CHECK(Math::sinc((T)-0.1) == doctest::Approx((T)0.9983341665));
CHECK(Math::sinc((T)0.1) == doctest::Approx((T)0.9983341665));
CHECK(Math::sinc((T)0.5) == doctest::Approx((T)0.9588510772));
CHECK(Math::sinc((T)1.0) == doctest::Approx((T)0.8414709848));
CHECK(Math::sinc((T)1.5) == doctest::Approx((T)0.6649966577));
CHECK(Math::sinc((T)450.0) == doctest::Approx((T)-0.0015184083));
CHECK(Math::sincn((T)-0.1) == doctest::Approx((T)0.9836316431));
CHECK(Math::sincn((T)0.1) == doctest::Approx((T)0.9836316431));
CHECK(Math::sincn((T)0.5) == doctest::Approx((T)0.6366197724));
CHECK(Math::sincn((T)1.0) == doctest::Approx((T)0.0));
CHECK(Math::sincn((T)1.5) == doctest::Approx((T)-0.2122065908));
CHECK(Math::sincn((T)450.0) == doctest::Approx((T)0.0));
CHECK(Math::atan2((T)-0.1, (T)0.5) == doctest::Approx((T)-0.1973955598));
CHECK(Math::atan2((T)0.1, (T)-0.5) == doctest::Approx((T)2.9441970937));
CHECK(Math::atan2((T)0.5, (T)1.5) == doctest::Approx((T)0.3217505544));
CHECK(Math::atan2((T)1.0, (T)2.5) == doctest::Approx((T)0.3805063771));
CHECK(Math::atan2((T)1.5, (T)1.0) == doctest::Approx((T)0.9827937232));
CHECK(Math::atan2((T)450.0, (T)1.0) == doctest::Approx((T)1.5685741082));
}
TEST_CASE_TEMPLATE("[Math] pow/log/log2/exp/sqrt", T, float, double) {
CHECK(Math::pow((T)-0.1, (T)2.0) == doctest::Approx((T)0.01));
CHECK(Math::pow((T)0.1, (T)2.5) == doctest::Approx((T)0.0031622777));
CHECK(Math::pow((T)0.5, (T)0.5) == doctest::Approx((T)0.7071067812));
CHECK(Math::pow((T)1.0, (T)1.0) == doctest::Approx((T)1.0));
CHECK(Math::pow((T)1.5, (T)-1.0) == doctest::Approx((T)0.6666666667));
CHECK(Math::pow((T)450.0, (T)-2.0) == doctest::Approx((T)0.0000049383));
CHECK(Math::pow((T)450.0, (T)0.0) == doctest::Approx((T)1.0));
CHECK(Math::is_nan(Math::log((T)-0.1)));
CHECK(Math::log((T)0.1) == doctest::Approx((T)-2.302585093));
CHECK(Math::log((T)0.5) == doctest::Approx((T)-0.6931471806));
CHECK(Math::log((T)1.0) == doctest::Approx((T)0.0));
CHECK(Math::log((T)1.5) == doctest::Approx((T)0.4054651081));
CHECK(Math::log((T)450.0) == doctest::Approx((T)6.1092475828));
CHECK(Math::is_nan(Math::log2((T)-0.1)));
CHECK(Math::log2((T)0.1) == doctest::Approx((T)-3.3219280949));
CHECK(Math::log2((T)0.5) == doctest::Approx((T)-1.0));
CHECK(Math::log2((T)1.0) == doctest::Approx((T)0.0));
CHECK(Math::log2((T)1.5) == doctest::Approx((T)0.5849625007));
CHECK(Math::log2((T)450.0) == doctest::Approx((T)8.8137811912));
CHECK(Math::exp((T)-0.1) == doctest::Approx((T)0.904837418));
CHECK(Math::exp((T)0.1) == doctest::Approx((T)1.1051709181));
CHECK(Math::exp((T)0.5) == doctest::Approx((T)1.6487212707));
CHECK(Math::exp((T)1.0) == doctest::Approx((T)2.7182818285));
CHECK(Math::exp((T)1.5) == doctest::Approx((T)4.4816890703));
CHECK(Math::is_nan(Math::sqrt((T)-0.1)));
CHECK(Math::sqrt((T)0.1) == doctest::Approx((T)0.316228));
CHECK(Math::sqrt((T)0.5) == doctest::Approx((T)0.707107));
CHECK(Math::sqrt((T)1.0) == doctest::Approx((T)1.0));
CHECK(Math::sqrt((T)1.5) == doctest::Approx((T)1.224745));
}
TEST_CASE_TEMPLATE("[Math] is_nan/is_inf", T, float, double) {
CHECK(!Math::is_nan((T)0.0));
CHECK(Math::is_nan((T)NAN));
CHECK(!Math::is_inf((T)0.0));
CHECK(Math::is_inf((T)INFINITY));
}
TEST_CASE_TEMPLATE("[Math] linear_to_db", T, float, double) {
CHECK(Math::linear_to_db((T)1.0) == doctest::Approx((T)0.0));
CHECK(Math::linear_to_db((T)20.0) == doctest::Approx((T)26.0206));
CHECK(Math::is_inf(Math::linear_to_db((T)0.0)));
CHECK(Math::is_nan(Math::linear_to_db((T)-20.0)));
}
TEST_CASE_TEMPLATE("[Math] db_to_linear", T, float, double) {
CHECK(Math::db_to_linear((T)0.0) == doctest::Approx((T)1.0));
CHECK(Math::db_to_linear((T)1.0) == doctest::Approx((T)1.122018));
CHECK(Math::db_to_linear((T)20.0) == doctest::Approx((T)10.0));
CHECK(Math::db_to_linear((T)-20.0) == doctest::Approx((T)0.1));
}
TEST_CASE_TEMPLATE("[Math] step_decimals", T, float, double) {
CHECK(Math::step_decimals((T)-0.5) == 1);
CHECK(Math::step_decimals((T)0) == 0);
CHECK(Math::step_decimals((T)1) == 0);
CHECK(Math::step_decimals((T)0.1) == 1);
CHECK(Math::step_decimals((T)0.01) == 2);
CHECK(Math::step_decimals((T)0.001) == 3);
CHECK(Math::step_decimals((T)0.0001) == 4);
CHECK(Math::step_decimals((T)0.00001) == 5);
CHECK(Math::step_decimals((T)0.000001) == 6);
CHECK(Math::step_decimals((T)0.0000001) == 7);
CHECK(Math::step_decimals((T)0.00000001) == 8);
CHECK(Math::step_decimals((T)0.000000001) == 9);
// Too many decimals to handle.
CHECK(Math::step_decimals((T)0.0000000001) == 0);
}
TEST_CASE_TEMPLATE("[Math] range_step_decimals", T, float, double) {
CHECK(Math::range_step_decimals((T)0.000000001) == 9);
// Too many decimals to handle.
CHECK(Math::range_step_decimals((T)0.0000000001) == 0);
// Should be treated as a step of 0 for use by the editor.
CHECK(Math::range_step_decimals((T)0.0) == 16);
CHECK(Math::range_step_decimals((T)-0.5) == 16);
}
TEST_CASE_TEMPLATE("[Math] lerp", T, float, double) {
CHECK(Math::lerp((T)2.0, (T)5.0, (T)-0.1) == doctest::Approx((T)1.7));
CHECK(Math::lerp((T)2.0, (T)5.0, (T)0.0) == doctest::Approx((T)2.0));
CHECK(Math::lerp((T)2.0, (T)5.0, (T)0.1) == doctest::Approx((T)2.3));
CHECK(Math::lerp((T)2.0, (T)5.0, (T)1.0) == doctest::Approx((T)5.0));
CHECK(Math::lerp((T)2.0, (T)5.0, (T)2.0) == doctest::Approx((T)8.0));
CHECK(Math::lerp((T)-2.0, (T)-5.0, (T)-0.1) == doctest::Approx((T)-1.7));
CHECK(Math::lerp((T)-2.0, (T)-5.0, (T)0.0) == doctest::Approx((T)-2.0));
CHECK(Math::lerp((T)-2.0, (T)-5.0, (T)0.1) == doctest::Approx((T)-2.3));
CHECK(Math::lerp((T)-2.0, (T)-5.0, (T)1.0) == doctest::Approx((T)-5.0));
CHECK(Math::lerp((T)-2.0, (T)-5.0, (T)2.0) == doctest::Approx((T)-8.0));
}
TEST_CASE_TEMPLATE("[Math] inverse_lerp", T, float, double) {
CHECK(Math::inverse_lerp((T)2.0, (T)5.0, (T)1.7) == doctest::Approx((T)-0.1));
CHECK(Math::inverse_lerp((T)2.0, (T)5.0, (T)2.0) == doctest::Approx((T)0.0));
CHECK(Math::inverse_lerp((T)2.0, (T)5.0, (T)2.3) == doctest::Approx((T)0.1));
CHECK(Math::inverse_lerp((T)2.0, (T)5.0, (T)5.0) == doctest::Approx((T)1.0));
CHECK(Math::inverse_lerp((T)2.0, (T)5.0, (T)8.0) == doctest::Approx((T)2.0));
CHECK(Math::inverse_lerp((T)-2.0, (T)-5.0, (T)-1.7) == doctest::Approx((T)-0.1));
CHECK(Math::inverse_lerp((T)-2.0, (T)-5.0, (T)-2.0) == doctest::Approx((T)0.0));
CHECK(Math::inverse_lerp((T)-2.0, (T)-5.0, (T)-2.3) == doctest::Approx((T)0.1));
CHECK(Math::inverse_lerp((T)-2.0, (T)-5.0, (T)-5.0) == doctest::Approx((T)1.0));
CHECK(Math::inverse_lerp((T)-2.0, (T)-5.0, (T)-8.0) == doctest::Approx((T)2.0));
}
TEST_CASE_TEMPLATE("[Math] remap", T, float, double) {
CHECK(Math::remap((T)50.0, (T)100.0, (T)200.0, (T)0.0, (T)1000.0) == doctest::Approx((T)-500.0));
CHECK(Math::remap((T)100.0, (T)100.0, (T)200.0, (T)0.0, (T)1000.0) == doctest::Approx((T)0.0));
CHECK(Math::remap((T)200.0, (T)100.0, (T)200.0, (T)0.0, (T)1000.0) == doctest::Approx((T)1000.0));
CHECK(Math::remap((T)250.0, (T)100.0, (T)200.0, (T)0.0, (T)1000.0) == doctest::Approx((T)1500.0));
CHECK(Math::remap((T)-50.0, (T)-100.0, (T)-200.0, (T)0.0, (T)1000.0) == doctest::Approx((T)-500.0));
CHECK(Math::remap((T)-100.0, (T)-100.0, (T)-200.0, (T)0.0, (T)1000.0) == doctest::Approx((T)0.0));
CHECK(Math::remap((T)-200.0, (T)-100.0, (T)-200.0, (T)0.0, (T)1000.0) == doctest::Approx((T)1000.0));
CHECK(Math::remap((T)-250.0, (T)-100.0, (T)-200.0, (T)0.0, (T)1000.0) == doctest::Approx((T)1500.0));
CHECK(Math::remap((T)-50.0, (T)-100.0, (T)-200.0, (T)0.0, (T)-1000.0) == doctest::Approx((T)500.0));
CHECK(Math::remap((T)-100.0, (T)-100.0, (T)-200.0, (T)0.0, (T)-1000.0) == doctest::Approx((T)0.0));
CHECK(Math::remap((T)-200.0, (T)-100.0, (T)-200.0, (T)0.0, (T)-1000.0) == doctest::Approx((T)-1000.0));
CHECK(Math::remap((T)-250.0, (T)-100.0, (T)-200.0, (T)0.0, (T)-1000.0) == doctest::Approx((T)-1500.0));
}
TEST_CASE_TEMPLATE("[Math] angle_difference", T, float, double) {
// Loops around, should return 0.0.
CHECK(Math::angle_difference((T)0.0, (T)Math_TAU) == doctest::Approx((T)0.0));
CHECK(Math::angle_difference((T)Math_PI, (T)-Math_PI) == doctest::Approx((T)0.0));
CHECK(Math::angle_difference((T)0.0, (T)Math_TAU * (T)4.0) == doctest::Approx((T)0.0));
// Rotation is clockwise, so it should return -PI.
CHECK(Math::angle_difference((T)0.0, (T)Math_PI) == doctest::Approx((T)-Math_PI));
CHECK(Math::angle_difference((T)0.0, (T)-Math_PI) == doctest::Approx((T)Math_PI));
CHECK(Math::angle_difference((T)Math_PI, (T)0.0) == doctest::Approx((T)Math_PI));
CHECK(Math::angle_difference((T)-Math_PI, (T)0.0) == doctest::Approx((T)-Math_PI));
CHECK(Math::angle_difference((T)0.0, (T)3.0) == doctest::Approx((T)3.0));
CHECK(Math::angle_difference((T)1.0, (T)-2.0) == doctest::Approx((T)-3.0));
CHECK(Math::angle_difference((T)-1.0, (T)2.0) == doctest::Approx((T)3.0));
CHECK(Math::angle_difference((T)-2.0, (T)-4.5) == doctest::Approx((T)-2.5));
CHECK(Math::angle_difference((T)100.0, (T)102.5) == doctest::Approx((T)2.5));
}
TEST_CASE_TEMPLATE("[Math] lerp_angle", T, float, double) {
// Counter-clockwise rotation.
CHECK(Math::lerp_angle((T)0.24 * Math_TAU, 0.75 * Math_TAU, 0.5) == doctest::Approx((T)-0.005 * Math_TAU));
// Counter-clockwise rotation.
CHECK(Math::lerp_angle((T)0.25 * Math_TAU, 0.75 * Math_TAU, 0.5) == doctest::Approx((T)0.0));
// Clockwise rotation.
CHECK(Math::lerp_angle((T)0.26 * Math_TAU, 0.75 * Math_TAU, 0.5) == doctest::Approx((T)0.505 * Math_TAU));
CHECK(Math::lerp_angle((T)-0.25 * Math_TAU, 1.25 * Math_TAU, 0.5) == doctest::Approx((T)-0.5 * Math_TAU));
CHECK(Math::lerp_angle((T)0.72 * Math_TAU, 1.44 * Math_TAU, 0.96) == doctest::Approx((T)0.4512 * Math_TAU));
CHECK(Math::lerp_angle((T)0.72 * Math_TAU, 1.44 * Math_TAU, 1.04) == doctest::Approx((T)0.4288 * Math_TAU));
// Initial and final angles are effectively identical, so the value returned
// should always be the same regardless of the `weight` parameter.
CHECK(Math::lerp_angle((T)-4 * Math_TAU, 4 * Math_TAU, -1.0) == doctest::Approx((T)-4.0 * Math_TAU));
CHECK(Math::lerp_angle((T)-4 * Math_TAU, 4 * Math_TAU, 0.0) == doctest::Approx((T)-4.0 * Math_TAU));
CHECK(Math::lerp_angle((T)-4 * Math_TAU, 4 * Math_TAU, 0.5) == doctest::Approx((T)-4.0 * Math_TAU));
CHECK(Math::lerp_angle((T)-4 * Math_TAU, 4 * Math_TAU, 1.0) == doctest::Approx((T)-4.0 * Math_TAU));
CHECK(Math::lerp_angle((T)-4 * Math_TAU, 4 * Math_TAU, 500.0) == doctest::Approx((T)-4.0 * Math_TAU));
}
TEST_CASE_TEMPLATE("[Math] move_toward", T, float, double) {
CHECK(Math::move_toward(2.0, 5.0, -1.0) == doctest::Approx((T)1.0));
CHECK(Math::move_toward(2.0, 5.0, 2.5) == doctest::Approx((T)4.5));
CHECK(Math::move_toward(2.0, 5.0, 4.0) == doctest::Approx((T)5.0));
CHECK(Math::move_toward(-2.0, -5.0, -1.0) == doctest::Approx((T)-1.0));
CHECK(Math::move_toward(-2.0, -5.0, 2.5) == doctest::Approx((T)-4.5));
CHECK(Math::move_toward(-2.0, -5.0, 4.0) == doctest::Approx((T)-5.0));
}
TEST_CASE_TEMPLATE("[Math] rotate_toward", T, float, double) {
// Rotate toward.
CHECK(Math::rotate_toward((T)0.0, (T)Math_PI * (T)0.75, (T)1.5) == doctest::Approx((T)1.5));
CHECK(Math::rotate_toward((T)-2.0, (T)1.0, (T)2.5) == doctest::Approx((T)0.5));
CHECK(Math::rotate_toward((T)-2.0, (T)Math_PI, (T)Math_PI) == doctest::Approx((T)-Math_PI));
CHECK(Math::rotate_toward((T)1.0, (T)Math_PI, (T)20.0) == doctest::Approx((T)Math_PI));
// Rotate away.
CHECK(Math::rotate_toward((T)0.0, (T)0.0, (T)-1.5) == doctest::Approx((T)-1.5));
CHECK(Math::rotate_toward((T)0.0, (T)0.0, (T)-Math_PI) == doctest::Approx((T)-Math_PI));
CHECK(Math::rotate_toward((T)3.0, (T)Math_PI, (T)-Math_PI) == doctest::Approx((T)0.0));
CHECK(Math::rotate_toward((T)2.0, (T)Math_PI, (T)-1.5) == doctest::Approx((T)0.5));
CHECK(Math::rotate_toward((T)1.0, (T)2.0, (T)-0.5) == doctest::Approx((T)0.5));
CHECK(Math::rotate_toward((T)2.5, (T)2.0, (T)-0.5) == doctest::Approx((T)3.0));
CHECK(Math::rotate_toward((T)-1.0, (T)1.0, (T)-1.0) == doctest::Approx((T)-2.0));
}
TEST_CASE_TEMPLATE("[Math] smoothstep", T, float, double) {
CHECK(Math::smoothstep((T)0.0, (T)2.0, (T)-5.0) == doctest::Approx((T)0.0));
CHECK(Math::smoothstep((T)0.0, (T)2.0, (T)0.5) == doctest::Approx((T)0.15625));
CHECK(Math::smoothstep((T)0.0, (T)2.0, (T)1.0) == doctest::Approx((T)0.5));
CHECK(Math::smoothstep((T)0.0, (T)2.0, (T)2.0) == doctest::Approx((T)1.0));
}
TEST_CASE("[Math] ease") {
CHECK(Math::ease(0.1, 1.0) == doctest::Approx(0.1));
CHECK(Math::ease(0.1, 2.0) == doctest::Approx(0.01));
CHECK(Math::ease(0.1, 0.5) == doctest::Approx(0.19));
CHECK(Math::ease(0.1, 0.0) == doctest::Approx(0));
CHECK(Math::ease(0.1, -0.5) == doctest::Approx(0.2236067977));
CHECK(Math::ease(0.1, -1.0) == doctest::Approx(0.1));
CHECK(Math::ease(0.1, -2.0) == doctest::Approx(0.02));
CHECK(Math::ease(-1.0, 1.0) == doctest::Approx(0));
CHECK(Math::ease(-1.0, 2.0) == doctest::Approx(0));
CHECK(Math::ease(-1.0, 0.5) == doctest::Approx(0));
CHECK(Math::ease(-1.0, 0.0) == doctest::Approx(0));
CHECK(Math::ease(-1.0, -0.5) == doctest::Approx(0));
CHECK(Math::ease(-1.0, -1.0) == doctest::Approx(0));
CHECK(Math::ease(-1.0, -2.0) == doctest::Approx(0));
}
TEST_CASE("[Math] snapped") {
CHECK(Math::snapped(0.5, 0.04) == doctest::Approx(0.52));
CHECK(Math::snapped(-0.5, 0.04) == doctest::Approx(-0.48));
CHECK(Math::snapped(0.0, 0.04) == doctest::Approx(0));
CHECK(Math::snapped(128'000.025, 0.04) == doctest::Approx(128'000.04));
CHECK(Math::snapped(0.5, 400) == doctest::Approx(0));
CHECK(Math::snapped(-0.5, 400) == doctest::Approx(0));
CHECK(Math::snapped(0.0, 400) == doctest::Approx(0));
CHECK(Math::snapped(128'000.025, 400) == doctest::Approx(128'000.0));
CHECK(Math::snapped(0.5, 0.0) == doctest::Approx(0.5));
CHECK(Math::snapped(-0.5, 0.0) == doctest::Approx(-0.5));
CHECK(Math::snapped(0.0, 0.0) == doctest::Approx(0.0));
CHECK(Math::snapped(128'000.025, 0.0) == doctest::Approx(128'000.0));
CHECK(Math::snapped(0.5, -1.0) == doctest::Approx(0));
CHECK(Math::snapped(-0.5, -1.0) == doctest::Approx(-1.0));
CHECK(Math::snapped(0.0, -1.0) == doctest::Approx(0));
CHECK(Math::snapped(128'000.025, -1.0) == doctest::Approx(128'000.0));
}
TEST_CASE("[Math] larger_prime") {
CHECK(Math::larger_prime(0) == 5);
CHECK(Math::larger_prime(1) == 5);
CHECK(Math::larger_prime(2) == 5);
CHECK(Math::larger_prime(5) == 13);
CHECK(Math::larger_prime(500) == 769);
CHECK(Math::larger_prime(1'000'000) == 1'572'869);
CHECK(Math::larger_prime(1'000'000'000) == 1'610'612'741);
// The next prime is larger than `INT32_MAX` and is not present in the built-in prime table.
ERR_PRINT_OFF;
CHECK(Math::larger_prime(2'000'000'000) == 0);
ERR_PRINT_ON;
}
TEST_CASE_TEMPLATE("[Math] fmod", T, float, double) {
CHECK(Math::fmod((T)-2.0, (T)0.3) == doctest::Approx((T)-0.2));
CHECK(Math::fmod((T)0.0, (T)0.3) == doctest::Approx((T)0.0));
CHECK(Math::fmod((T)2.0, (T)0.3) == doctest::Approx((T)0.2));
CHECK(Math::fmod((T)-2.0, (T)-0.3) == doctest::Approx((T)-0.2));
CHECK(Math::fmod((T)0.0, (T)-0.3) == doctest::Approx((T)0.0));
CHECK(Math::fmod((T)2.0, (T)-0.3) == doctest::Approx((T)0.2));
}
TEST_CASE_TEMPLATE("[Math] fposmod", T, float, double) {
CHECK(Math::fposmod((T)-2.0, (T)0.3) == doctest::Approx((T)0.1));
CHECK(Math::fposmod((T)0.0, (T)0.3) == doctest::Approx((T)0.0));
CHECK(Math::fposmod((T)2.0, (T)0.3) == doctest::Approx((T)0.2));
CHECK(Math::fposmod((T)-2.0, (T)-0.3) == doctest::Approx((T)-0.2));
CHECK(Math::fposmod((T)0.0, (T)-0.3) == doctest::Approx((T)0.0));
CHECK(Math::fposmod((T)2.0, (T)-0.3) == doctest::Approx((T)-0.1));
}
TEST_CASE_TEMPLATE("[Math] fposmodp", T, float, double) {
CHECK(Math::fposmodp((T)-2.0, (T)0.3) == doctest::Approx((T)0.1));
CHECK(Math::fposmodp((T)0.0, (T)0.3) == doctest::Approx((T)0.0));
CHECK(Math::fposmodp((T)2.0, (T)0.3) == doctest::Approx((T)0.2));
CHECK(Math::fposmodp((T)-2.0, (T)-0.3) == doctest::Approx((T)-0.5));
CHECK(Math::fposmodp((T)0.0, (T)-0.3) == doctest::Approx((T)0.0));
CHECK(Math::fposmodp((T)2.0, (T)-0.3) == doctest::Approx((T)0.2));
}
TEST_CASE("[Math] posmod") {
CHECK(Math::posmod(-20, 3) == 1);
CHECK(Math::posmod(0, 3) == 0);
CHECK(Math::posmod(20, 3) == 2);
CHECK(Math::posmod(-20, -3) == -2);
CHECK(Math::posmod(0, -3) == 0);
CHECK(Math::posmod(20, -3) == -1);
}
TEST_CASE("[Math] wrapi") {
CHECK(Math::wrapi(-30, -20, 160) == 150);
CHECK(Math::wrapi(30, -20, 160) == 30);
CHECK(Math::wrapi(300, -20, 160) == 120);
CHECK(Math::wrapi(300'000'000'000, -20, 160) == 120);
}
TEST_CASE_TEMPLATE("[Math] wrapf", T, float, double) {
CHECK(Math::wrapf((T)-30.0, (T)-20.0, (T)160.0) == doctest::Approx((T)150.0));
CHECK(Math::wrapf((T)30.0, (T)-2.0, (T)160.0) == doctest::Approx((T)30.0));
CHECK(Math::wrapf((T)300.0, (T)-20.0, (T)160.0) == doctest::Approx((T)120.0));
CHECK(Math::wrapf(300'000'000'000.0, -20.0, 160.0) == doctest::Approx((T)120.0));
// float's precision is too low for 300'000'000'000.0, so we reduce it by a factor of 1000.
CHECK(Math::wrapf((float)15'000'000.0, (float)-20.0, (float)160.0) == doctest::Approx((T)60.0));
}
TEST_CASE_TEMPLATE("[Math] fract", T, float, double) {
CHECK(Math::fract((T)1.0) == doctest::Approx((T)0.0));
CHECK(Math::fract((T)77.8) == doctest::Approx((T)0.8));
CHECK(Math::fract((T)-10.1) == doctest::Approx((T)0.9));
}
TEST_CASE_TEMPLATE("[Math] pingpong", T, float, double) {
CHECK(Math::pingpong((T)0.0, (T)0.0) == doctest::Approx((T)0.0));
CHECK(Math::pingpong((T)1.0, (T)1.0) == doctest::Approx((T)1.0));
CHECK(Math::pingpong((T)0.5, (T)2.0) == doctest::Approx((T)0.5));
CHECK(Math::pingpong((T)3.5, (T)2.0) == doctest::Approx((T)0.5));
CHECK(Math::pingpong((T)11.5, (T)2.0) == doctest::Approx((T)0.5));
CHECK(Math::pingpong((T)-2.5, (T)2.0) == doctest::Approx((T)1.5));
}
TEST_CASE_TEMPLATE("[Math] deg_to_rad/rad_to_deg", T, float, double) {
CHECK(Math::deg_to_rad((T)180.0) == doctest::Approx((T)Math_PI));
CHECK(Math::deg_to_rad((T)-27.0) == doctest::Approx((T)-0.471239));
CHECK(Math::rad_to_deg((T)Math_PI) == doctest::Approx((T)180.0));
CHECK(Math::rad_to_deg((T)-1.5) == doctest::Approx((T)-85.94366927));
}
TEST_CASE_TEMPLATE("[Math] cubic_interpolate", T, float, double) {
CHECK(Math::cubic_interpolate((T)0.2, (T)0.8, (T)0.0, (T)1.0, (T)0.0) == doctest::Approx((T)0.2));
CHECK(Math::cubic_interpolate((T)0.2, (T)0.8, (T)0.0, (T)1.0, (T)0.25) == doctest::Approx((T)0.33125));
CHECK(Math::cubic_interpolate((T)0.2, (T)0.8, (T)0.0, (T)1.0, (T)0.5) == doctest::Approx((T)0.5));
CHECK(Math::cubic_interpolate((T)0.2, (T)0.8, (T)0.0, (T)1.0, (T)0.75) == doctest::Approx((T)0.66875));
CHECK(Math::cubic_interpolate((T)0.2, (T)0.8, (T)0.0, (T)1.0, (T)1.0) == doctest::Approx((T)0.8));
CHECK(Math::cubic_interpolate((T)20.2, (T)30.1, (T)-100.0, (T)32.0, (T)-50.0) == doctest::Approx((T)-6662732.3));
CHECK(Math::cubic_interpolate((T)20.2, (T)30.1, (T)-100.0, (T)32.0, (T)-5.0) == doctest::Approx((T)-9356.3));
CHECK(Math::cubic_interpolate((T)20.2, (T)30.1, (T)-100.0, (T)32.0, (T)0.0) == doctest::Approx((T)20.2));
CHECK(Math::cubic_interpolate((T)20.2, (T)30.1, (T)-100.0, (T)32.0, (T)1.0) == doctest::Approx((T)30.1));
CHECK(Math::cubic_interpolate((T)20.2, (T)30.1, (T)-100.0, (T)32.0, (T)4.0) == doctest::Approx((T)1853.2));
}
TEST_CASE_TEMPLATE("[Math] cubic_interpolate_angle", T, float, double) {
CHECK(Math::cubic_interpolate_angle((T)(Math_PI * (1.0 / 6.0)), (T)(Math_PI * (5.0 / 6.0)), (T)0.0, (T)Math_PI, (T)0.0) == doctest::Approx((T)Math_PI * (1.0 / 6.0)));
CHECK(Math::cubic_interpolate_angle((T)(Math_PI * (1.0 / 6.0)), (T)(Math_PI * (5.0 / 6.0)), (T)0.0, (T)Math_PI, (T)0.25) == doctest::Approx((T)0.973566));
CHECK(Math::cubic_interpolate_angle((T)(Math_PI * (1.0 / 6.0)), (T)(Math_PI * (5.0 / 6.0)), (T)0.0, (T)Math_PI, (T)0.5) == doctest::Approx((T)Math_PI / 2.0));
CHECK(Math::cubic_interpolate_angle((T)(Math_PI * (1.0 / 6.0)), (T)(Math_PI * (5.0 / 6.0)), (T)0.0, (T)Math_PI, (T)0.75) == doctest::Approx((T)2.16803));
CHECK(Math::cubic_interpolate_angle((T)(Math_PI * (1.0 / 6.0)), (T)(Math_PI * (5.0 / 6.0)), (T)0.0, (T)Math_PI, (T)1.0) == doctest::Approx((T)Math_PI * (5.0 / 6.0)));
}
TEST_CASE_TEMPLATE("[Math] cubic_interpolate_in_time", T, float, double) {
CHECK(Math::cubic_interpolate_in_time((T)0.2, (T)0.8, (T)0.0, (T)1.0, (T)0.0, (T)0.5, (T)0.0, (T)1.0) == doctest::Approx((T)0.0));
CHECK(Math::cubic_interpolate_in_time((T)0.2, (T)0.8, (T)0.0, (T)1.0, (T)0.25, (T)0.5, (T)0.0, (T)1.0) == doctest::Approx((T)0.1625));
CHECK(Math::cubic_interpolate_in_time((T)0.2, (T)0.8, (T)0.0, (T)1.0, (T)0.5, (T)0.5, (T)0.0, (T)1.0) == doctest::Approx((T)0.4));
CHECK(Math::cubic_interpolate_in_time((T)0.2, (T)0.8, (T)0.0, (T)1.0, (T)0.75, (T)0.5, (T)0.0, (T)1.0) == doctest::Approx((T)0.6375));
CHECK(Math::cubic_interpolate_in_time((T)0.2, (T)0.8, (T)0.0, (T)1.0, (T)1.0, (T)0.5, (T)0.0, (T)1.0) == doctest::Approx((T)0.8));
}
TEST_CASE_TEMPLATE("[Math] cubic_interpolate_angle_in_time", T, float, double) {
CHECK(Math::cubic_interpolate_angle_in_time((T)(Math_PI * (1.0 / 6.0)), (T)(Math_PI * (5.0 / 6.0)), (T)0.0, (T)Math_PI, (T)0.0, (T)0.5, (T)0.0, (T)1.0) == doctest::Approx((T)0.0));
CHECK(Math::cubic_interpolate_angle_in_time((T)(Math_PI * (1.0 / 6.0)), (T)(Math_PI * (5.0 / 6.0)), (T)0.0, (T)Math_PI, (T)0.25, (T)0.5, (T)0.0, (T)1.0) == doctest::Approx((T)0.494964));
CHECK(Math::cubic_interpolate_angle_in_time((T)(Math_PI * (1.0 / 6.0)), (T)(Math_PI * (5.0 / 6.0)), (T)0.0, (T)Math_PI, (T)0.5, (T)0.5, (T)0.0, (T)1.0) == doctest::Approx((T)1.27627));
CHECK(Math::cubic_interpolate_angle_in_time((T)(Math_PI * (1.0 / 6.0)), (T)(Math_PI * (5.0 / 6.0)), (T)0.0, (T)Math_PI, (T)0.75, (T)0.5, (T)0.0, (T)1.0) == doctest::Approx((T)2.07394));
CHECK(Math::cubic_interpolate_angle_in_time((T)(Math_PI * (1.0 / 6.0)), (T)(Math_PI * (5.0 / 6.0)), (T)0.0, (T)Math_PI, (T)1.0, (T)0.5, (T)0.0, (T)1.0) == doctest::Approx((T)Math_PI * (5.0 / 6.0)));
}
TEST_CASE_TEMPLATE("[Math] bezier_interpolate", T, float, double) {
CHECK(Math::bezier_interpolate((T)0.0, (T)0.2, (T)0.8, (T)1.0, (T)0.0) == doctest::Approx((T)0.0));
CHECK(Math::bezier_interpolate((T)0.0, (T)0.2, (T)0.8, (T)1.0, (T)0.25) == doctest::Approx((T)0.2125));
CHECK(Math::bezier_interpolate((T)0.0, (T)0.2, (T)0.8, (T)1.0, (T)0.5) == doctest::Approx((T)0.5));
CHECK(Math::bezier_interpolate((T)0.0, (T)0.2, (T)0.8, (T)1.0, (T)0.75) == doctest::Approx((T)0.7875));
CHECK(Math::bezier_interpolate((T)0.0, (T)0.2, (T)0.8, (T)1.0, (T)1.0) == doctest::Approx((T)1.0));
}
} // namespace TestMath
#endif // TEST_MATH_FUNCS_H
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