mirror of
https://github.com/smallmain/cocos-enhance-kit.git
synced 2025-01-14 15:01:07 +00:00
128 lines
4.1 KiB
C++
128 lines
4.1 KiB
C++
/******************************************************************************
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* Spine Runtimes License Agreement
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* Last updated January 1, 2020. Replaces all prior versions.
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*
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* Copyright (c) 2013-2020, Esoteric Software LLC
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*
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* Integration of the Spine Runtimes into software or otherwise creating
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* derivative works of the Spine Runtimes is permitted under the terms and
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* conditions of Section 2 of the Spine Editor License Agreement:
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* http://esotericsoftware.com/spine-editor-license
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*
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* Otherwise, it is permitted to integrate the Spine Runtimes into software
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* or otherwise create derivative works of the Spine Runtimes (collectively,
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* "Products"), provided that each user of the Products must obtain their own
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* Spine Editor license and redistribution of the Products in any form must
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* include this license and copyright notice.
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*
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* THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,
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* BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THE SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*****************************************************************************/
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#ifdef SPINE_UE4
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#include "SpinePluginPrivatePCH.h"
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#endif
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#include <spine/MathUtil.h>
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#include <math.h>
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#include <stdlib.h>
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// Required for division by 0 in _isNaN on MSVC
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#ifdef _MSC_VER
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#pragma warning(disable:4723)
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#endif
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using namespace spine;
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const float MathUtil::Pi = 3.1415926535897932385f;
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const float MathUtil::Pi_2 = 3.1415926535897932385f * 2;
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const float MathUtil::Deg_Rad = (3.1415926535897932385f / 180.0f);
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const float MathUtil::Rad_Deg = (180.0f / 3.1415926535897932385f);
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float MathUtil::abs(float v) {
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return ((v) < 0 ? -(v) : (v));
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}
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float MathUtil::sign(float v) {
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return ((v) < 0 ? -1.0f : (v) > 0 ? 1.0f : 0.0f);
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}
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float MathUtil::clamp(float x, float min, float max) {
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return ((x) < (min) ? (min) : ((x) > (max) ? (max) : (x)));
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}
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float MathUtil::fmod(float a, float b) {
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return (float)::fmod(a, b);
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}
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/// Returns atan2 in radians, faster but less accurate than Math.Atan2. Average error of 0.00231 radians (0.1323
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/// degrees), largest error of 0.00488 radians (0.2796 degrees).
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float MathUtil::atan2(float y, float x) {
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return (float)::atan2(y, x);
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}
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/// Returns the cosine in radians from a lookup table.
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float MathUtil::cos(float radians) {
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return (float)::cos(radians);
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}
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/// Returns the sine in radians from a lookup table.
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float MathUtil::sin(float radians) {
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return (float)::sin(radians);
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}
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float MathUtil::sqrt(float v) {
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return (float)::sqrt(v);
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}
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float MathUtil::acos(float v) {
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return (float)::acos(v);
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}
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/// Returns the sine in radians from a lookup table.
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float MathUtil::sinDeg(float degrees) {
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return (float)::sin(degrees * MathUtil::Deg_Rad);
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}
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/// Returns the cosine in radians from a lookup table.
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float MathUtil::cosDeg(float degrees) {
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return (float)::cos(degrees * MathUtil::Deg_Rad);
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}
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/* Need to pass 0 as an argument, so VC++ doesn't error with C2124 */
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static bool _isNan(float value, float zero) {
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float _nan = (float) 0.0 / zero;
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return 0 == memcmp((void *) &value, (void *) &_nan, sizeof(value));
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}
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bool MathUtil::isNan(float v) {
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return _isNan(v, 0);
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}
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float MathUtil::random() {
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return ::rand() / (float)RAND_MAX;
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}
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float MathUtil::randomTriangular(float min, float max) {
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return randomTriangular(min, max, (min + max) * 0.5f);
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}
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float MathUtil::randomTriangular(float min, float max, float mode) {
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float u = random();
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float d = max - min;
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if (u <= (mode - min) / d) return min + sqrt(u * d * (mode - min));
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return max - sqrt((1 - u) * d * (max - mode));
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}
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float MathUtil::pow(float a, float b) {
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return (float)::pow(a, b);
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}
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