2 * copyright (c) 2010 Sveriges Television AB <info@casparcg.com>
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4 * This file is part of CasparCG.
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6 * CasparCG is free software: you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation, either version 3 of the License, or
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9 * (at your option) any later version.
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11 * CasparCG is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 * GNU General Public License for more details.
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16 * You should have received a copy of the GNU General Public License
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17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
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21 // The following code is based on Tweener for actionscript, http://code.google.com/p/tweener/
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23 //Disclaimer for Robert Penner's Easing Equations license:
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25 //TERMS OF USE - EASING EQUATIONS
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27 //Open source under the BSD License.
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29 //Copyright © 2001 Robert Penner
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30 //All rights reserved.
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32 //Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
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34 // * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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35 // * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
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36 // * Neither the name of the author nor the names of contributors may be used to endorse or promote products derived from this software without specific prior written permission.
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38 //THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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39 #include "../stdafx.h"
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41 #include "tweener.h"
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43 #include <boost/assign/list_of.hpp>
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44 #include <boost/regex.hpp>
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45 #include <boost/lexical_cast.hpp>
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47 #include <unordered_map>
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50 #include <functional>
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55 typedef std::function<double(double, double, double, double)> tweener_t;
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57 static const double PI = std::atan(1.0)*4.0;
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58 static const double H_PI = std::atan(1.0)*2.0;
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60 double ease_none (double t, double b, double c, double d, const std::vector<double>& params)
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65 double ease_in_quad (double t, double b, double c, double d, const std::vector<double>& params)
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67 return c*(t/=d)*t + b;
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70 double ease_out_quad (double t, double b, double c, double d, const std::vector<double>& params)
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72 return -c *(t/=d)*(t-2) + b;
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75 double ease_in_out_quad (double t, double b, double c, double d, const std::vector<double>& params)
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80 return -c/2 * ((--t)*(t-2) - 1) + b;
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83 double ease_out_in_quad (double t, double b, double c, double d, const std::vector<double>& params)
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86 return ease_out_quad (t*2, b, c/2, d, params);
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88 return ease_in_quad((t*2)-d, b+c/2, c/2, d, params);
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91 double ease_in_cubic (double t, double b, double c, double d, const std::vector<double>& params)
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93 return c*(t/=d)*t*t + b;
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96 double ease_out_cubic (double t, double b, double c, double d, const std::vector<double>& params)
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98 return c*((t=t/d-1)*t*t + 1) + b;
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101 double ease_in_out_cubic (double t, double b, double c, double d, const std::vector<double>& params)
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104 return c/2*t*t*t + b;
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106 return c/2*((t-=2)*t*t + 2) + b;
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109 double ease_out_in_cubic (double t, double b, double c, double d, const std::vector<double>& params)
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111 if (t < d/2) return ease_out_cubic (t*2, b, c/2, d, params);
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112 return ease_in_cubic((t*2)-d, b+c/2, c/2, d, params);
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115 double ease_in_quart (double t, double b, double c, double d, const std::vector<double>& params)
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117 return c*(t/=d)*t*t*t + b;
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120 double ease_out_quart (double t, double b, double c, double d, const std::vector<double>& params)
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122 return -c * ((t=t/d-1)*t*t*t - 1) + b;
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125 double ease_in_out_quart (double t, double b, double c, double d, const std::vector<double>& params)
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128 return c/2*t*t*t*t + b;
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130 return -c/2 * ((t-=2)*t*t*t - 2) + b;
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133 double ease_out_in_quart (double t, double b, double c, double d, const std::vector<double>& params)
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136 return ease_out_quart (t*2, b, c/2, d, params);
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138 return ease_in_quart((t*2)-d, b+c/2, c/2, d, params);
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141 double ease_in_quint (double t, double b, double c, double d, const std::vector<double>& params)
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143 return c*(t/=d)*t*t*t*t + b;
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146 double ease_out_quint (double t, double b, double c, double d, const std::vector<double>& params)
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148 return c*((t=t/d-1)*t*t*t*t + 1) + b;
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151 double ease_in_out_quint (double t, double b, double c, double d, const std::vector<double>& params)
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154 return c/2*t*t*t*t*t + b;
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156 return c/2*((t-=2)*t*t*t*t + 2) + b;
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159 double ease_out_in_quint (double t, double b, double c, double d, const std::vector<double>& params)
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162 return ease_out_quint (t*2, b, c/2, d, params);
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164 return ease_in_quint((t*2)-d, b+c/2, c/2, d, params);
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167 double ease_in_sine (double t, double b, double c, double d, const std::vector<double>& params)
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169 return -c * std::cos(t/d * (PI/2)) + c + b;
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172 double ease_out_sine (double t, double b, double c, double d, const std::vector<double>& params)
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174 return c * std::sin(t/d * (PI/2)) + b;
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177 double ease_in_out_sine (double t, double b, double c, double d, const std::vector<double>& params)
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179 return -c/2 * (std::cos(PI*t/d) - 1) + b;
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182 double ease_out_in_sine (double t, double b, double c, double d, const std::vector<double>& params)
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185 return ease_out_sine (t*2, b, c/2, d, params);
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187 return ease_in_sine((t*2)-d, b+c/2, c/2, d, params);
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190 double ease_in_expo (double t, double b, double c, double d, const std::vector<double>& params)
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192 return (t==0) ? b : c * std::pow(2, 10 * (t/d - 1)) + b - c * 0.001;
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195 double ease_out_expo (double t, double b, double c, double d, const std::vector<double>& params)
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197 return (t==d) ? b+c : c * 1.001 * (-std::pow(2, -10 * t/d) + 1) + b;
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200 double ease_in_out_expo (double t, double b, double c, double d, const std::vector<double>& params)
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207 return c/2 * std::pow(2, 10 * (t - 1)) + b - c * 0.0005;
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209 return c/2 * 1.0005 * (-std::pow(2, -10 * --t) + 2) + b;
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212 double ease_out_in_expo (double t, double b, double c, double d, const std::vector<double>& params)
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215 return ease_out_expo (t*2, b, c/2, d, params);
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217 return ease_in_expo((t*2)-d, b+c/2, c/2, d, params);
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220 double ease_in_circ (double t, double b, double c, double d, const std::vector<double>& params)
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222 return -c * (std::sqrt(1 - (t/=d)*t) - 1) + b;
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225 double ease_out_circ (double t, double b, double c, double d, const std::vector<double>& params)
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227 return c * std::sqrt(1 - (t=t/d-1)*t) + b;
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230 double ease_in_out_circ (double t, double b, double c, double d, const std::vector<double>& params)
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233 return -c/2 * (std::sqrt(1 - t*t) - 1) + b;
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235 return c/2 * (std::sqrt(1 - (t-=2)*t) + 1) + b;
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238 double ease_out_in_circ (double t, double b, double c, double d, const std::vector<double>& params)
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240 if (t < d/2) return ease_out_circ(t*2, b, c/2, d, params);
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241 return ease_in_circ((t*2)-d, b+c/2, c/2, d, params);
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244 double ease_in_elastic (double t, double b, double c, double d, const std::vector<double>& params)
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246 if (t==0) return b;
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247 if ((t/=d)==1) return b+c;
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248 //var p:Number = !Boolean(p_params) || isNaN(p_params.period) ? d*.3 : p_params.period;
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250 //var a:Number = !Boolean(p_params) || isNaN(p_params.amplitude) ? 0 : p_params.amplitude;
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251 double p = params.size() > 0 ? params[0] : d*0.3;
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253 double a = params.size() > 1 ? params[1] : 0.0;
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254 if (a == 0.0 || a < std::abs(c))
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260 s = p/(2*PI) * std::asin (c/a);
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262 return -(a*std::pow(2,10*(t-=1)) * std::sin( (t*d-s)*(2*PI)/p )) + b;
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265 double ease_out_elastic (double t, double b, double c, double d, const std::vector<double>& params)
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271 //var p:Number = !Boolean(p_params) || isNaN(p_params.period) ? d*.3 : p_params.period;
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273 //var a:Number = !Boolean(p_params) || isNaN(p_params.amplitude) ? 0 : p_params.amplitude;
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274 double p = params.size() > 0 ? params[0] : d*0.3;
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276 double a = params.size() > 1 ? params[1] : 0.0;
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277 if (a == 0.0 || a < std::abs(c))
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283 s = p/(2*PI) * std::asin (c/a);
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285 return (a*std::pow(2,-10*t) * std::sin( (t*d-s)*(2*PI)/p ) + c + b);
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288 double ease_in_out_elastic (double t, double b, double c, double d, const std::vector<double>& params)
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294 //var p:Number = !Boolean(p_params) || isNaN(p_params.period) ? d*(.3*1.5) : p_params.period;
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296 //var a:Number = !Boolean(p_params) || isNaN(p_params.amplitude) ? 0 : p_params.amplitude;
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297 double p = params.size() > 0 ? params[0] : d*0.3*1.5;
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299 double a = params.size() > 1 ? params[1] : 0.0;
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300 if (a == 0.0 || a < std::abs(c))
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306 s = p/(2*PI) * std::asin (c/a);
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309 return -.5*(a*std::pow(2,10*(t-=1)) * std::sin( (t*d-s)*(2*PI)/p )) + b;
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311 return a*std::pow(2,-10*(t-=1)) * std::sin( (t*d-s)*(2*PI)/p )*.5 + c + b;
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314 double ease_out_in_elastic (double t, double b, double c, double d, const std::vector<double>& params)
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316 if (t < d/2) return ease_out_elastic (t*2, b, c/2, d, params);
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317 return ease_in_elastic((t*2)-d, b+c/2, c/2, d, params);
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320 double ease_in_back (double t, double b, double c, double d, const std::vector<double>& params)
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322 //var s:Number = !Boolean(p_params) || isNaN(p_params.overshoot) ? 1.70158 : p_params.overshoot;
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323 double s = params.size() > 0 ? params[0] : 1.70158;
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324 return c*(t/=d)*t*((s+1)*t - s) + b;
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327 double ease_out_back (double t, double b, double c, double d, const std::vector<double>& params)
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329 //var s:Number = !Boolean(p_params) || isNaN(p_params.overshoot) ? 1.70158 : p_params.overshoot;
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330 double s = params.size() > 0 ? params[0] : 1.70158;
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331 return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
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334 double ease_in_out_back (double t, double b, double c, double d, const std::vector<double>& params)
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336 //var s:Number = !Boolean(p_params) || isNaN(p_params.overshoot) ? 1.70158 : p_params.overshoot;
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337 double s = params.size() > 0 ? params[0] : 1.70158;
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338 if ((t/=d/2) < 1) return c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b;
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339 return c/2*((t-=2)*t*(((s*=(1.525))+1)*t + s) + 2) + b;
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342 double ease_out_int_back (double t, double b, double c, double d, const std::vector<double>& params)
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344 if (t < d/2) return ease_out_back (t*2, b, c/2, d, params);
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345 return ease_in_back((t*2)-d, b+c/2, c/2, d, params);
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348 double ease_out_bounce (double t, double b, double c, double d, const std::vector<double>& params)
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350 if ((t/=d) < (1/2.75))
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351 return c*(7.5625*t*t) + b;
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352 else if (t < (2/2.75))
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353 return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;
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354 else if (t < (2.5/2.75))
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355 return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
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357 return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;
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360 double ease_in_bounce (double t, double b, double c, double d, const std::vector<double>& params)
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362 return c - ease_out_bounce (d-t, 0, c, d, params) + b;
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365 double ease_in_out_bounce (double t, double b, double c, double d, const std::vector<double>& params)
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367 if (t < d/2) return ease_in_bounce (t*2, 0, c, d, params) * .5 + b;
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368 else return ease_out_bounce (t*2-d, 0, c, d, params) * .5 + c*.5 + b;
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372 double ease_out_in_bounce (double t, double b, double c, double d, const std::vector<double>& params)
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374 if (t < d/2) return ease_out_bounce (t*2, b, c/2, d, params);
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375 return ease_in_bounce((t*2)-d, b+c/2, c/2, d, params);
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378 tweener_t get_tweener(std::wstring name)
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380 std::transform(name.begin(), name.end(), name.begin(), std::tolower);
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382 if(name == L"linear")
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383 return [](double t, double b, double c, double d){return ease_none(t, b, c, d, std::vector<double>());};
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385 std::vector<double> params;
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387 static const boost::wregex expr(L"(?<NAME>\\w*)(:(?<V0>\\d+\\.?\\d?))?(:(?<V1>\\d+\\.?\\d?))?"); // boost::regex has no repeated captures?
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388 boost::wsmatch what;
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389 if(boost::regex_match(name, what, expr))
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391 name = what["NAME"].str();
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392 if(what["V0"].matched)
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393 params.push_back(boost::lexical_cast<double>(what["V0"].str()));
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394 if(what["V1"].matched)
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395 params.push_back(boost::lexical_cast<double>(what["V1"].str()));
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398 typedef std::function<double(double, double, double, double, const std::vector<double>&)> tween_t;
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399 static const std::unordered_map<std::wstring, tween_t> tweens = boost::assign::map_list_of
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401 (L"linear", ease_none )
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402 (L"easenone", ease_none )
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403 (L"easeinquad", ease_in_quad )
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404 (L"easeoutquad", ease_out_quad )
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405 (L"easeinoutquad", ease_in_out_quad )
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406 (L"easeoutinquad", ease_out_in_quad )
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407 (L"easeincubic", ease_in_cubic )
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408 (L"easeoutcubic", ease_out_cubic )
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409 (L"easeinoutcubic", ease_in_out_cubic )
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410 (L"easeoutincubic", ease_out_in_cubic )
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411 (L"easeinquart", ease_in_quart )
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412 (L"easeoutquart", ease_out_quart )
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413 (L"easeinoutquart", ease_in_out_quart )
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414 (L"easeoutinquart", ease_out_in_quart )
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415 (L"easeinquint", ease_in_quint )
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416 (L"easeoutquint", ease_out_quint )
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417 (L"easeinoutquint", ease_in_out_quint )
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418 (L"easeoutinquint", ease_out_in_quint )
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419 (L"easeinsine", ease_in_sine )
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420 (L"easeoutsine", ease_out_sine )
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421 (L"easeinoutsine", ease_in_out_sine )
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422 (L"easeoutinsine", ease_out_in_sine )
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423 (L"easeinexpo", ease_in_expo )
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424 (L"easeoutexpo", ease_out_expo )
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425 (L"easeinoutexpo", ease_in_out_expo )
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426 (L"easeoutinexpo", ease_out_in_expo )
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427 (L"easeincirc", ease_in_circ )
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428 (L"easeoutcirc", ease_out_circ )
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429 (L"easeinoutcirc", ease_in_out_circ )
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430 (L"easeoutincirc", ease_out_in_circ )
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431 (L"easeinelastic", ease_in_elastic )
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432 (L"easeoutelastic", ease_out_elastic )
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433 (L"easeinoutelastic", ease_in_out_elastic)
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434 (L"easeoutinelastic", ease_out_in_elastic)
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435 (L"easeinback", ease_in_back )
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436 (L"easeoutback", ease_out_back )
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437 (L"easeinoutback", ease_in_out_back )
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438 (L"easeoutintback", ease_out_int_back )
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439 (L"easeoutbounce", ease_out_bounce )
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440 (L"easeinbounce", ease_in_bounce )
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441 (L"easeinoutbounce", ease_in_out_bounce )
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442 (L"easeoutinbounce", ease_out_in_bounce );
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444 auto it = tweens.find(name);
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445 if(it == tweens.end())
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446 it = tweens.find(L"linear");
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448 return [=](double t, double b, double c, double d)
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450 return it->second(t, b, c, d, params);
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