mirror of
https://github.com/TorqueGameEngines/Torque3D.git
synced 2026-01-20 12:44:46 +00:00
99 lines
2.7 KiB
C++
99 lines
2.7 KiB
C++
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//~~~~~~~~~~~~~~~~~~~~//~~~~~~~~~~~~~~~~~~~~//~~~~~~~~~~~~~~~~~~~~//~~~~~~~~~~~~~~~~~~~~~//
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// Arcane-FX for MIT Licensed Open Source version of Torque 3D from GarageGames
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// Copyright (C) 2015 Faust Logic, Inc.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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//~~~~~~~~~~~~~~~~~~~~//~~~~~~~~~~~~~~~~~~~~//~~~~~~~~~~~~~~~~~~~~//~~~~~~~~~~~~~~~~~~~~~//
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#include "afx/arcaneFX.h"
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#include "afxEase.h"
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//~~~~~~~~~~~~~~~~~~~~//~~~~~~~~~~~~~~~~~~~~//~~~~~~~~~~~~~~~~~~~~//~~~~~~~~~~~~~~~~~~~~~//
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F32
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afxEase::t(F32 t, F32 ein, F32 eout)
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{
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if (t == 0.0)
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return 0.0;
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if (t == 1.0)
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return 1.0;
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F32 ee = eout - ein + 1.0;
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// ease in section
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if (t <= ein)
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{
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F32 tin = t/ein;
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return (mSin(M_PI_F*(tin - 1.0)) + M_PI_F*tin)*ein*(1.0/M_PI_F)/ee;
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}
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// middle linear section
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else if (t <= eout)
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{
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return (2.0*t - ein)/ee;
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}
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// ease out section
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else
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{
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F32 iout = 1.0 - eout;
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F32 g = (t - eout)*M_PI_F/iout;
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return ((mSin(g) + g)*(iout)/M_PI_F + 2.0*eout - ein)*1.0/ee + 0.0;
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}
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}
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F32
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afxEase::eq(F32 t, F32 a, F32 b, F32 ein, F32 eout)
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{
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if (t == 0.0)
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return a;
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if (t == 1.0)
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return b;
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F32 ab = b - a;
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F32 ee = eout - ein + 1.0;
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// ease in section
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if (t <= ein)
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{
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F32 tin = t/ein;
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return a + (mSin(M_PI_F*(tin - 1.0)) + M_PI_F*tin)*ab*ein*(1.0/M_PI_F)/ee;
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}
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// middle linear section
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else if (t <= eout)
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{
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return a + ab*(2.0*t - ein)/ee;
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}
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// ease out section
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else
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{
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F32 iout = 1.0 - eout;
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F32 g = (t - eout)*M_PI_F/iout;
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return ((mSin(g) + g)*(iout)/M_PI_F + 2.0*eout - ein)*ab/ee + a;
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}
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}
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//~~~~~~~~~~~~~~~~~~~~//~~~~~~~~~~~~~~~~~~~~//~~~~~~~~~~~~~~~~~~~~//~~~~~~~~~~~~~~~~~~~~~//
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