mirror of
https://github.com/smallmain/cocos-enhance-kit.git
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128 lines
3.9 KiB
C++
128 lines
3.9 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/CurveTimeline.h>
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#include <spine/MathUtil.h>
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using namespace spine;
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RTTI_IMPL(CurveTimeline, Timeline)
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const float CurveTimeline::LINEAR = 0;
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const float CurveTimeline::STEPPED = 1;
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const float CurveTimeline::BEZIER = 2;
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const int CurveTimeline::BEZIER_SIZE = 10 * 2 - 1;
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CurveTimeline::CurveTimeline(int frameCount) {
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assert(frameCount > 0);
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_curves.setSize((frameCount - 1) * BEZIER_SIZE, 0);
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}
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CurveTimeline::~CurveTimeline() {
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}
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size_t CurveTimeline::getFrameCount() {
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return _curves.size() / BEZIER_SIZE + 1;
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}
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void CurveTimeline::setLinear(size_t frameIndex) {
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_curves[frameIndex * BEZIER_SIZE] = LINEAR;
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}
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void CurveTimeline::setStepped(size_t frameIndex) {
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_curves[frameIndex * BEZIER_SIZE] = STEPPED;
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}
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void CurveTimeline::setCurve(size_t frameIndex, float cx1, float cy1, float cx2, float cy2) {
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float tmpx = (-cx1 * 2 + cx2) * 0.03f, tmpy = (-cy1 * 2 + cy2) * 0.03f;
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float dddfx = ((cx1 - cx2) * 3 + 1) * 0.006f, dddfy = ((cy1 - cy2) * 3 + 1) * 0.006f;
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float ddfx = tmpx * 2 + dddfx, ddfy = tmpy * 2 + dddfy;
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float dfx = cx1 * 0.3f + tmpx + dddfx * 0.16666667f, dfy = cy1 * 0.3f + tmpy + dddfy * 0.16666667f;
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size_t i = frameIndex * BEZIER_SIZE;
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_curves[i++] = BEZIER;
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float x = dfx, y = dfy;
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for (size_t n = i + BEZIER_SIZE - 1; i < n; i += 2) {
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_curves[i] = x;
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_curves[i + 1] = y;
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dfx += ddfx;
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dfy += ddfy;
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ddfx += dddfx;
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ddfy += dddfy;
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x += dfx;
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y += dfy;
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}
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}
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float CurveTimeline::getCurvePercent(size_t frameIndex, float percent) {
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percent = MathUtil::clamp(percent, 0, 1);
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size_t i = frameIndex * BEZIER_SIZE;
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float type = _curves[i];
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if (type == LINEAR) {
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return percent;
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}
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if (type == STEPPED) {
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return 0;
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}
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i++;
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float x = 0;
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for (size_t start = i, n = i + BEZIER_SIZE - 1; i < n; i += 2) {
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x = _curves[i];
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if (x >= percent) {
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float prevX, prevY;
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if (i == start) {
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prevX = 0;
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prevY = 0;
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} else {
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prevX = _curves[i - 2];
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prevY = _curves[i - 1];
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}
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return prevY + (_curves[i + 1] - prevY) * (percent - prevX) / (x - prevX);
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}
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}
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float y = _curves[i - 1];
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return y + (1 - y) * (percent - x) / (1 - x); // Last point is 1,1.
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}
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float CurveTimeline::getCurveType(size_t frameIndex) {
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return _curves[frameIndex * BEZIER_SIZE];
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}
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