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tween: add ability to store a custom tweening function with the Tween object

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Sebastian Krzyszkowiak 2018-11-20 20:30:48 +01:00
parent 9d9d23dfe8
commit a68e15e274
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GPG key ID: E8F235CF3BDBC3FF
2 changed files with 10 additions and 1 deletions
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6
src/tween.c
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@ -256,6 +256,7 @@ SYMBOL_EXPORT struct Tween Tween(struct Game* game, double start, double stop, T
.predelay = 0,
.postdelay = 0,
.callback = NULL,
.func = NULL,
.data = NULL};
}
@ -340,11 +341,16 @@ SYMBOL_EXPORT double Interpolate(double pos, TWEEN_STYLE style) {
return BounceEaseOut(pos);
case TWEEN_STYLE_BOUNCE_IN_OUT:
return BounceEaseInOut(pos);
default:
return pos;
}
return pos;
}
SYMBOL_EXPORT double GetTweenInterpolation(struct Tween* tween) {
if (tween->style == TWEEN_STYLE_CUSTOM && tween->func) {
return tween->func(GetTweenPosition(tween));
}
return Interpolate(GetTweenPosition(tween), tween->style);
}

5
src/tween.h
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@ -65,7 +65,9 @@ typedef enum TWEEN_STYLE {
// Exponentially-decaying bounce easing
TWEEN_STYLE_BOUNCE_IN,
TWEEN_STYLE_BOUNCE_OUT,
TWEEN_STYLE_BOUNCE_IN_OUT
TWEEN_STYLE_BOUNCE_IN_OUT,
// Custom callback
TWEEN_STYLE_CUSTOM
} TWEEN_STYLE; // Cheet sheet at http://easings.net/ :)
struct Tween {
@ -76,6 +78,7 @@ struct Tween {
bool paused;
bool done;
struct Game* game;
double (*func)(double value);
void (*callback)(struct Game* game, struct Tween* tween, void* data);
void* data;
};