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|
//-----------------------------------------------------------------------------
// Name: im_tween.h
// Developer: Wolfire Games LLC
// Description: A collection of tweening functions
// License: Read below
//-----------------------------------------------------------------------------
/*******
*
* Based on tween.lua by Enrique García Cota (https://github.com/kikito/tween.lua)
*
* Original license (for this file):
*
* MIT LICENSE
*
* Copyright (c) 2014 Enrique García Cota, Yuichi Tateno, Emmanuel Oga
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#pragma once
#include <Math/enginemath.h>
#include <cmath>
using std::pow;
// For all functions:
// time t running time. How much time has passed *right now*
// begin b starting property value
// change c ending - beginning
// duration d how much time has to pass for the tweening to complete
/*******************************************************************************************/
/**
* @brief Base struct for all tweens
*
*/
struct IMTween {
int refCount;
virtual float compute( float t, float b, float c, float d ) = 0;
// dummy functions as we're not ref counting these
void AddRef() {
}
void Release() {
}
};
/**
* Linear
**/
struct LinearTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
return c * t / d + b;
}
};
/**
* Quad
**/
struct InQuadTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
return c * pow(t / d, 2) + b;
}
};
struct OutQuadTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
t = t / d;
return -c * t * (t - 2) + b;
}
};
struct InOutQuadTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
t = t / d * 2;
if ( t < 1 ) {
return c / 2 * pow(t, 2) + b;
}
return -c / 2 * ((t - 1) * (t - 3) - 1) + b;
}
};
struct OutInQuadTween : public IMTween {
InQuadTween inQuad;
OutQuadTween outQuad;
virtual float compute( float t, float b, float c, float d ) {
if ( t < d / 2 ) {
return outQuad.compute(t * 2, b, c / 2, d);
}
return inQuad.compute((t * 2) - d, b + c / 2, c / 2, d);
}
};
/**
* Cubic
**/
struct InCubicTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
return c * pow(t / d, 3) + b;
}
};
struct OutCubicTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
return c * (pow(t / d - 1, 3) + 1) + b;
}
};
struct InOutCubicTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
t = t / d * 2;
if ( t < 1 ) {
return c / 2 * t * t * t + b;
}
t = t - 2;
return c / 2 * (t * t * t + 2) + b;
}
};
struct OutInCubicTween : public IMTween {
OutCubicTween outCubic;
InCubicTween inCubic;
virtual float compute( float t, float b, float c, float d ) {
if( t < d / 2 ) {
return outCubic.compute(t * 2, b, c / 2, d);
}
return inCubic.compute((t * 2) - d, b + c / 2, c / 2, d);
}
};
/**
* Quart
**/
struct InQuartTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
return c * pow(t / d, 4) + b;
}
};
struct OutQuartTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
return -c * (pow(t / d - 1, 4) - 1) + b;
}
};
struct InOutQuartTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
t = t / d * 2;
if (t < 1 ) {
return c / 2 * pow(t, 4) + b;
}
return -c / 2 * (pow(t - 2, 4) - 2) + b;
}
};
struct OutInQuartTween : public IMTween {
OutQuartTween outQuart;
InQuartTween inQuart;
virtual float compute( float t, float b, float c, float d ) {
if (t < d / 2 ) {
return outQuart.compute(t * 2, b, c / 2, d);
}
return inQuart.compute((t * 2) - d, b + c / 2, c / 2, d);
}
};
/**
* Quint
**/
struct InQuintTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
return c * pow(t / d, 5) + b;
}
};
struct OutQuintTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
return c * (pow(t / d - 1, 5) + 1) + b;
}
};
struct InOutQuintTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
t = t / d * 2;
if (t < 1) {
return c / 2 * pow(t, 5) + b;
}
return c / 2 * (pow(t - 2, 5) + 2) + b;
}
};
struct OutInQuintTween : public IMTween {
InQuintTween inQuint;
OutQuintTween outQuint;
virtual float compute( float t, float b, float c, float d ) {
if ( t < d / 2 ) {
return outQuint.compute(t * 2, b, c / 2, d);
}
return inQuint.compute((t * 2) - d, b + c / 2, c / 2, d);
}
};
/**
* Sine
**/
struct InSineTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
return -c * cos(t / d * (PI_f / 2)) + c + b;
}
};
struct OutSineTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
return c * sin(t / d * (PI_f / 2)) + b;
}
};
struct InOutSineTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
return -c / 2 * (cos(PI_f * t / d) - 1) + b;
}
};
struct OutInSineTween : public IMTween {
InSineTween inSine;
OutSineTween outSine;
virtual float compute( float t, float b, float c, float d ) {
if( t < d / 2 ) {
return outSine.compute(t * 2, b, c / 2, d);
}
return inSine.compute((t * 2) -d, b + c / 2, c / 2, d);
}
};
/**
* Expo
**/
struct InExpoTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
if( t == 0 ){
return b;
}
return (float) (c * pow(2, 10 * (t / d - 1)) + b - c * 0.001);
}
};
struct OutExpoTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
if( t == d ){
return b + c;
}
return (float) (c * 1.001 * (-pow(2, -10 * t / d) + 1) + b);
}
};
struct InOutExpoTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
if( t == 0 ){
return b;
}
if( t == d ){
return b + c;
}
t = t / d * 2;
if( t < 1 ){
return (float) (c / 2 * pow(2, 10 * (t - 1)) + b - c * 0.0005);
}
return (float) (c / 2 * 1.0005 * (-pow(2, -10 * (t - 1)) + 2) + b);
}
};
struct OutInExpoTween : public IMTween {
InExpoTween inExpo;
OutExpoTween outExpo;
virtual float compute( float t, float b, float c, float d ) {
if( t < d / 2 ){
return outExpo.compute(t * 2, b, c / 2, d);
}
return inExpo.compute((t * 2) - d, b + c / 2, c / 2, d);
}
};
/**
* Circ
**/
struct InCircTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
return(-c * (sqrt(1 - pow(t / d, 2)) - 1) + b);
}
};
struct OutCircTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
return(c * sqrt(1 - pow(t / d - 1, 2)) + b);
}
};
struct InOutCircTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
t = t / d * 2;
if( t < 1 ){
return -c / 2 * (sqrt(1 - t * t) - 1) + b;
}
t = t - 2;
return c / 2 * (sqrt(1 - t * t) + 1) + b;
}
};
struct OutInCircTween : public IMTween {
InCircTween inCirc;
OutCircTween outCirc;
virtual float compute( float t, float b, float c, float d ) {
if( t < d / 2 ){
return outCirc.compute(t * 2, b, c / 2, d);
}
return inCirc.compute((t * 2) - d, b + c / 2, c / 2, d);
}
};
/**
* Bounce
**/
struct OutBounceTween : public IMTween {
virtual float compute( float t, float b, float c, float d ) {
t = t / d;
if( t < 1 / 2.75f ){
return c * (7.5625f * t * t) + b;
}
if( t < 2 / 2.75f ) {
t = t - (1.5f / 2.75f);
return c * (7.5625f * t * t + 0.75f) + b;
}
else if( t < 2.5f / 2.75f ){
t = t - (2.25f / 2.75f);
return c * (7.5625f * t * t + 0.9375f) + b;
}
t = t - (2.625f / 2.75f);
return c * (7.5625f * t * t + 0.984375f) + b;
}
};
struct InBounceTween : public IMTween {
OutBounceTween outBounce;
virtual float compute( float t, float b, float c, float d ) {
return c - outBounce.compute(d - t, 0, c, d) + b;
}
};
struct InOutBounceTween : public IMTween {
OutBounceTween outBounce;
InBounceTween inBounce;
virtual float compute( float t, float b, float c, float d ) {
if( t < d / 2 ) {
return inBounce.compute(t * 2, 0, c, d) * 0.5f + b;
}
return outBounce.compute(t * 2 - d, 0, c, d) * 0.5f + c * 0.5f + b;
}
};
struct OutInBounceTween : public IMTween {
InBounceTween inBounce;
OutBounceTween outBounce;
virtual float compute( float t, float b, float c, float d ) {
if( t < d / 2 ) {
return outBounce.compute(t * 2, b, c / 2, d);
}
return inBounce.compute((t * 2) - d, b + c / 2, c / 2, d);
}
};
/*******
*
* Enum type for enumerating the tweens
*
*/
enum IMTweenType {
linearTween,
inQuadTween,
outQuadTween,
inOutQuadTween,
outInQuadTween,
inCubicTween,
outCubicTween,
inOutCubicTween,
outInCubicTween,
inQuartTween,
outQuartTween,
inOutQuartTween,
outInQuartTween,
inQuintTween,
outQuintTween,
inOutQuintTween,
outInQuintTween,
inSineTween,
outSineTween,
inOutSineTween,
outInSineTween,
inExpoTween,
outExpoTween,
inOutExpoTween,
outInExpoTween,
inCircTween,
outCircTween,
inOutCircTween,
outInCircTween,
outBounceTween,
inBounceTween,
inOutBounceTween,
outInBounceTween
};
// Turn an instance into a pointer to a tween object
IMTween* getTweenInstance( IMTweenType tweenType );
|