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94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/*! \file tween.h
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* \brief Tweening engine.
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*/
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/*
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* Copyright (c) Sebastian Krzyszkowiak <dos@dosowisko.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef LIBSUPERDERPY_TWEEN_H
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#define LIBSUPERDERPY_TWEEN_H
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#include "libsuperderpy.h"
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typedef enum TWEEN_STYLE {
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// Linear
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TWEEN_STYLE_LINEAR,
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// Quadratic easing; p^2
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TWEEN_STYLE_QUADRATIC_IN,
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TWEEN_STYLE_QUADRATIC_OUT,
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TWEEN_STYLE_QUADRATIC_IN_OUT,
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// Cubic easing; p^3
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TWEEN_STYLE_CUBIC_IN,
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TWEEN_STYLE_CUBIC_OUT,
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TWEEN_STYLE_CUBIC_IN_OUT,
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// Quartic easing; p^4
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TWEEN_STYLE_QUARTIC_IN,
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TWEEN_STYLE_QUARTIC_OUT,
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TWEEN_STYLE_QUARTIC_IN_OUT,
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// Quintic easing; p^5
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TWEEN_STYLE_QUINTIC_IN,
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TWEEN_STYLE_QUINTIC_OUT,
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TWEEN_STYLE_QUINTIC_IN_OUT,
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// Sine wave easing; sin(p * PI/2)
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TWEEN_STYLE_SINE_IN,
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TWEEN_STYLE_SINE_OUT,
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TWEEN_STYLE_SINE_IN_OUT,
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// Circular easing; sqrt(1 - p^2)
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TWEEN_STYLE_CIRCULAR_IN,
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TWEEN_STYLE_CIRCULAR_OUT,
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TWEEN_STYLE_CIRCULAR_IN_OUT,
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// Exponential easing, base 2
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TWEEN_STYLE_EXPONENTIAL_IN,
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TWEEN_STYLE_EXPONENTIAL_OUT,
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TWEEN_STYLE_EXPONENTIAL_IN_OUT,
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// Exponentially-damped sine wave easing
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TWEEN_STYLE_ELASTIC_IN,
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TWEEN_STYLE_ELASTIC_OUT,
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TWEEN_STYLE_ELASTIC_IN_OUT,
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// Overshooting cubic easing;
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TWEEN_STYLE_BACK_IN,
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TWEEN_STYLE_BACK_OUT,
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TWEEN_STYLE_BACK_IN_OUT,
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// Exponentially-decaying bounce easing
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TWEEN_STYLE_BOUNCE_IN,
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TWEEN_STYLE_BOUNCE_OUT,
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TWEEN_STYLE_BOUNCE_IN_OUT,
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// Custom callback
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TWEEN_STYLE_CUSTOM
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} TWEEN_STYLE; // Cheet sheet at http://easings.net/ :)
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struct Tween {
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double start, stop;
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double duration, pos;
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double predelay, postdelay;
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TWEEN_STYLE style;
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bool paused;
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bool done;
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struct Game* game;
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double (*func)(double value);
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void (*callback)(struct Game* game, struct Tween* tween, void* data);
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void* data;
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};
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struct Tween Tween(struct Game* game, double start, double stop, TWEEN_STYLE style, double duration);
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struct Tween StaticTween(struct Game* game, double value);
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double GetTweenPosition(struct Tween* tween);
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double GetTweenInterpolation(struct Tween* tween);
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double GetTweenValue(struct Tween* tween);
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void UpdateTween(struct Tween* tween, double delta);
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double Interpolate(double pos, TWEEN_STYLE style);
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#endif
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