2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
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4 * This file is part of CasparCG (www.casparcg.com).
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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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19 * Author: Robert Nagy, ronag89@gmail.com
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23 // The following code is based on Tweener for actionscript, http://code.google.com/p/tweener/
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25 //Disclaimer for Robert Penner's Easing Equations license:
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27 //TERMS OF USE - EASING EQUATIONS
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29 //Open source under the BSD License.
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31 //Copyright © 2001 Robert Penner
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32 //All rights reserved.
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34 //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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36 // * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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37 // * 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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38 // * 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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40 //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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41 #include "../stdafx.h"
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43 #include "tweener.h"
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45 #include <boost/assign/list_of.hpp>
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46 #include <boost/regex.hpp>
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47 #include <boost/lexical_cast.hpp>
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49 #include <unordered_map>
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52 #include <functional>
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57 typedef std::function<double(double, double, double, double)> tweener_t;
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59 static const double PI = std::atan(1.0)*4.0;
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60 static const double H_PI = std::atan(1.0)*2.0;
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62 double ease_none (double t, double b, double c, double d, const std::vector<double>& params)
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67 double ease_in_quad (double t, double b, double c, double d, const std::vector<double>& params)
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69 return c*(t/=d)*t + b;
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72 double ease_out_quad (double t, double b, double c, double d, const std::vector<double>& params)
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74 return -c *(t/=d)*(t-2) + b;
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77 double ease_in_out_quad (double t, double b, double c, double d, const std::vector<double>& params)
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82 return -c/2 * ((--t)*(t-2) - 1) + b;
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85 double ease_out_in_quad (double t, double b, double c, double d, const std::vector<double>& params)
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88 return ease_out_quad (t*2, b, c/2, d, params);
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90 return ease_in_quad((t*2)-d, b+c/2, c/2, d, params);
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93 double ease_in_cubic (double t, double b, double c, double d, const std::vector<double>& params)
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95 return c*(t/=d)*t*t + b;
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98 double ease_out_cubic (double t, double b, double c, double d, const std::vector<double>& params)
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100 return c*((t=t/d-1)*t*t + 1) + b;
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103 double ease_in_out_cubic (double t, double b, double c, double d, const std::vector<double>& params)
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106 return c/2*t*t*t + b;
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108 return c/2*((t-=2)*t*t + 2) + b;
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111 double ease_out_in_cubic (double t, double b, double c, double d, const std::vector<double>& params)
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113 if (t < d/2) return ease_out_cubic (t*2, b, c/2, d, params);
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114 return ease_in_cubic((t*2)-d, b+c/2, c/2, d, params);
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117 double ease_in_quart (double t, double b, double c, double d, const std::vector<double>& params)
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119 return c*(t/=d)*t*t*t + b;
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122 double ease_out_quart (double t, double b, double c, double d, const std::vector<double>& params)
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124 return -c * ((t=t/d-1)*t*t*t - 1) + b;
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127 double ease_in_out_quart (double t, double b, double c, double d, const std::vector<double>& params)
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130 return c/2*t*t*t*t + b;
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132 return -c/2 * ((t-=2)*t*t*t - 2) + b;
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135 double ease_out_in_quart (double t, double b, double c, double d, const std::vector<double>& params)
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138 return ease_out_quart (t*2, b, c/2, d, params);
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140 return ease_in_quart((t*2)-d, b+c/2, c/2, d, params);
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143 double ease_in_quint (double t, double b, double c, double d, const std::vector<double>& params)
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145 return c*(t/=d)*t*t*t*t + b;
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148 double ease_out_quint (double t, double b, double c, double d, const std::vector<double>& params)
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150 return c*((t=t/d-1)*t*t*t*t + 1) + b;
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153 double ease_in_out_quint (double t, double b, double c, double d, const std::vector<double>& params)
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156 return c/2*t*t*t*t*t + b;
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158 return c/2*((t-=2)*t*t*t*t + 2) + b;
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161 double ease_out_in_quint (double t, double b, double c, double d, const std::vector<double>& params)
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164 return ease_out_quint (t*2, b, c/2, d, params);
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166 return ease_in_quint((t*2)-d, b+c/2, c/2, d, params);
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169 double ease_in_sine (double t, double b, double c, double d, const std::vector<double>& params)
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171 return -c * std::cos(t/d * (PI/2)) + c + b;
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174 double ease_out_sine (double t, double b, double c, double d, const std::vector<double>& params)
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176 return c * std::sin(t/d * (PI/2)) + b;
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179 double ease_in_out_sine (double t, double b, double c, double d, const std::vector<double>& params)
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181 return -c/2 * (std::cos(PI*t/d) - 1) + b;
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184 double ease_out_in_sine (double t, double b, double c, double d, const std::vector<double>& params)
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187 return ease_out_sine (t*2, b, c/2, d, params);
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189 return ease_in_sine((t*2)-d, b+c/2, c/2, d, params);
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192 double ease_in_expo (double t, double b, double c, double d, const std::vector<double>& params)
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194 return (t==0) ? b : c * std::pow(2, 10 * (t/d - 1)) + b - c * 0.001;
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197 double ease_out_expo (double t, double b, double c, double d, const std::vector<double>& params)
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199 return (t==d) ? b+c : c * 1.001 * (-std::pow(2, -10 * t/d) + 1) + b;
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202 double ease_in_out_expo (double t, double b, double c, double d, const std::vector<double>& params)
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209 return c/2 * std::pow(2, 10 * (t - 1)) + b - c * 0.0005;
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211 return c/2 * 1.0005 * (-std::pow(2, -10 * --t) + 2) + b;
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214 double ease_out_in_expo (double t, double b, double c, double d, const std::vector<double>& params)
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217 return ease_out_expo (t*2, b, c/2, d, params);
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219 return ease_in_expo((t*2)-d, b+c/2, c/2, d, params);
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222 double ease_in_circ (double t, double b, double c, double d, const std::vector<double>& params)
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224 return -c * (std::sqrt(1 - (t/=d)*t) - 1) + b;
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227 double ease_out_circ (double t, double b, double c, double d, const std::vector<double>& params)
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229 return c * std::sqrt(1 - (t=t/d-1)*t) + b;
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232 double ease_in_out_circ (double t, double b, double c, double d, const std::vector<double>& params)
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235 return -c/2 * (std::sqrt(1 - t*t) - 1) + b;
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237 return c/2 * (std::sqrt(1 - (t-=2)*t) + 1) + b;
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240 double ease_out_in_circ (double t, double b, double c, double d, const std::vector<double>& params)
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242 if (t < d/2) return ease_out_circ(t*2, b, c/2, d, params);
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243 return ease_in_circ((t*2)-d, b+c/2, c/2, d, params);
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246 double ease_in_elastic (double t, double b, double c, double d, const std::vector<double>& params)
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248 if (t==0) return b;
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249 if ((t/=d)==1) return b+c;
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250 //var p:Number = !Boolean(p_params) || isNaN(p_params.period) ? d*.3 : p_params.period;
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252 //var a:Number = !Boolean(p_params) || isNaN(p_params.amplitude) ? 0 : p_params.amplitude;
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253 double p = params.size() > 0 ? params[0] : d*0.3;
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255 double a = params.size() > 1 ? params[1] : 0.0;
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256 if (a == 0.0 || a < std::abs(c))
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262 s = p/(2*PI) * std::asin (c/a);
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264 return -(a*std::pow(2,10*(t-=1)) * std::sin( (t*d-s)*(2*PI)/p )) + b;
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267 double ease_out_elastic (double t, double b, double c, double d, const std::vector<double>& params)
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273 //var p:Number = !Boolean(p_params) || isNaN(p_params.period) ? d*.3 : p_params.period;
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275 //var a:Number = !Boolean(p_params) || isNaN(p_params.amplitude) ? 0 : p_params.amplitude;
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276 double p = params.size() > 0 ? params[0] : d*0.3;
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278 double a = params.size() > 1 ? params[1] : 0.0;
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279 if (a == 0.0 || a < std::abs(c))
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285 s = p/(2*PI) * std::asin (c/a);
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287 return (a*std::pow(2,-10*t) * std::sin( (t*d-s)*(2*PI)/p ) + c + b);
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290 double ease_in_out_elastic (double t, double b, double c, double d, const std::vector<double>& params)
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296 //var p:Number = !Boolean(p_params) || isNaN(p_params.period) ? d*(.3*1.5) : p_params.period;
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298 //var a:Number = !Boolean(p_params) || isNaN(p_params.amplitude) ? 0 : p_params.amplitude;
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299 double p = params.size() > 0 ? params[0] : d*0.3*1.5;
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301 double a = params.size() > 1 ? params[1] : 0.0;
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302 if (a == 0.0 || a < std::abs(c))
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308 s = p/(2*PI) * std::asin (c/a);
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311 return -.5*(a*std::pow(2,10*(t-=1)) * std::sin( (t*d-s)*(2*PI)/p )) + b;
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313 return a*std::pow(2,-10*(t-=1)) * std::sin( (t*d-s)*(2*PI)/p )*.5 + c + b;
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316 double ease_out_in_elastic (double t, double b, double c, double d, const std::vector<double>& params)
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318 if (t < d/2) return ease_out_elastic (t*2, b, c/2, d, params);
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319 return ease_in_elastic((t*2)-d, b+c/2, c/2, d, params);
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322 double ease_in_back (double t, double b, double c, double d, const std::vector<double>& params)
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324 //var s:Number = !Boolean(p_params) || isNaN(p_params.overshoot) ? 1.70158 : p_params.overshoot;
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325 double s = params.size() > 0 ? params[0] : 1.70158;
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326 return c*(t/=d)*t*((s+1)*t - s) + b;
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329 double ease_out_back (double t, double b, double c, double d, const std::vector<double>& params)
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331 //var s:Number = !Boolean(p_params) || isNaN(p_params.overshoot) ? 1.70158 : p_params.overshoot;
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332 double s = params.size() > 0 ? params[0] : 1.70158;
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333 return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
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336 double ease_in_out_back (double t, double b, double c, double d, const std::vector<double>& params)
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338 //var s:Number = !Boolean(p_params) || isNaN(p_params.overshoot) ? 1.70158 : p_params.overshoot;
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339 double s = params.size() > 0 ? params[0] : 1.70158;
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340 if ((t/=d/2) < 1) return c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b;
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341 return c/2*((t-=2)*t*(((s*=(1.525))+1)*t + s) + 2) + b;
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344 double ease_out_int_back (double t, double b, double c, double d, const std::vector<double>& params)
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346 if (t < d/2) return ease_out_back (t*2, b, c/2, d, params);
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347 return ease_in_back((t*2)-d, b+c/2, c/2, d, params);
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350 double ease_out_bounce (double t, double b, double c, double d, const std::vector<double>& params)
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352 if ((t/=d) < (1/2.75))
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353 return c*(7.5625*t*t) + b;
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354 else if (t < (2/2.75))
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355 return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;
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356 else if (t < (2.5/2.75))
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357 return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
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359 return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;
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362 double ease_in_bounce (double t, double b, double c, double d, const std::vector<double>& params)
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364 return c - ease_out_bounce (d-t, 0, c, d, params) + b;
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367 double ease_in_out_bounce (double t, double b, double c, double d, const std::vector<double>& params)
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369 if (t < d/2) return ease_in_bounce (t*2, 0, c, d, params) * .5 + b;
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370 else return ease_out_bounce (t*2-d, 0, c, d, params) * .5 + c*.5 + b;
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374 double ease_out_in_bounce (double t, double b, double c, double d, const std::vector<double>& params)
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376 if (t < d/2) return ease_out_bounce (t*2, b, c/2, d, params);
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377 return ease_in_bounce((t*2)-d, b+c/2, c/2, d, params);
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380 tweener_t get_tweener(std::wstring name)
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382 std::transform(name.begin(), name.end(), name.begin(), std::tolower);
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384 if(name == L"linear")
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385 return [](double t, double b, double c, double d){return ease_none(t, b, c, d, std::vector<double>());};
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387 std::vector<double> params;
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389 static const boost::wregex expr(L"(?<NAME>\\w*)(:(?<V0>\\d+\\.?\\d?))?(:(?<V1>\\d+\\.?\\d?))?"); // boost::regex has no repeated captures?
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390 boost::wsmatch what;
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391 if(boost::regex_match(name, what, expr))
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393 name = what["NAME"].str();
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394 if(what["V0"].matched)
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395 params.push_back(boost::lexical_cast<double>(what["V0"].str()));
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396 if(what["V1"].matched)
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397 params.push_back(boost::lexical_cast<double>(what["V1"].str()));
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400 typedef std::function<double(double, double, double, double, const std::vector<double>&)> tween_t;
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401 static const std::unordered_map<std::wstring, tween_t> tweens = boost::assign::map_list_of
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403 (L"linear", ease_none )
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404 (L"easenone", ease_none )
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405 (L"easeinquad", ease_in_quad )
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406 (L"easeoutquad", ease_out_quad )
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407 (L"easeinoutquad", ease_in_out_quad )
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408 (L"easeoutinquad", ease_out_in_quad )
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409 (L"easeincubic", ease_in_cubic )
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410 (L"easeoutcubic", ease_out_cubic )
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411 (L"easeinoutcubic", ease_in_out_cubic )
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412 (L"easeoutincubic", ease_out_in_cubic )
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413 (L"easeinquart", ease_in_quart )
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414 (L"easeoutquart", ease_out_quart )
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415 (L"easeinoutquart", ease_in_out_quart )
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416 (L"easeoutinquart", ease_out_in_quart )
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417 (L"easeinquint", ease_in_quint )
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418 (L"easeoutquint", ease_out_quint )
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419 (L"easeinoutquint", ease_in_out_quint )
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420 (L"easeoutinquint", ease_out_in_quint )
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421 (L"easeinsine", ease_in_sine )
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422 (L"easeoutsine", ease_out_sine )
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423 (L"easeinoutsine", ease_in_out_sine )
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424 (L"easeoutinsine", ease_out_in_sine )
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425 (L"easeinexpo", ease_in_expo )
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426 (L"easeoutexpo", ease_out_expo )
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427 (L"easeinoutexpo", ease_in_out_expo )
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428 (L"easeoutinexpo", ease_out_in_expo )
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429 (L"easeincirc", ease_in_circ )
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430 (L"easeoutcirc", ease_out_circ )
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431 (L"easeinoutcirc", ease_in_out_circ )
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432 (L"easeoutincirc", ease_out_in_circ )
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433 (L"easeinelastic", ease_in_elastic )
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434 (L"easeoutelastic", ease_out_elastic )
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435 (L"easeinoutelastic", ease_in_out_elastic)
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436 (L"easeoutinelastic", ease_out_in_elastic)
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437 (L"easeinback", ease_in_back )
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438 (L"easeoutback", ease_out_back )
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439 (L"easeinoutback", ease_in_out_back )
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440 (L"easeoutintback", ease_out_int_back )
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441 (L"easeoutbounce", ease_out_bounce )
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442 (L"easeinbounce", ease_in_bounce )
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443 (L"easeinoutbounce", ease_in_out_bounce )
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444 (L"easeoutinbounce", ease_out_in_bounce );
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446 auto it = tweens.find(name);
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447 if(it == tweens.end())
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448 it = tweens.find(L"linear");
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450 return [=](double t, double b, double c, double d)
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452 return it->second(t, b, c, d, params);
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