32 lines
775 B
C++
32 lines
775 B
C++
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//
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// Quart.cpp
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//
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// This code is derived from Universal Tween Engine
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// Licensed under Apache License 2.0 - http://www.apache.org/licenses/LICENSE-2.0
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//
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#include <TweenEngine/equations/Quart.h>
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namespace TweenEngine
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{
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float QuartIn::compute(float t) { return t*t*t*t; }
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const char *QuartIn::toString() { return "Quart.IN"; }
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float QuartOut::compute(float t) {
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t-=1;
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return -(t*t*t*t - 1);
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}
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const char *QuartOut::toString() { return "Quart.OUT"; }
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float QuartInOut::compute(float t) {
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t *= 2;
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if (t < 1) {
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return 0.5f*t*t*t*t;
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} else {
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t -= 2;
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return -0.5f * (t*t*t*t - 2);
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}
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}
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const char *QuartInOut::toString() { return "Quart.INOUT"; }
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}
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