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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, .predelay = 0,
.postdelay = 0, .postdelay = 0,
.callback = NULL, .callback = NULL,
.func = NULL,
.data = NULL}; .data = NULL};
} }
@ -340,11 +341,16 @@ SYMBOL_EXPORT double Interpolate(double pos, TWEEN_STYLE style) {
return BounceEaseOut(pos); return BounceEaseOut(pos);
case TWEEN_STYLE_BOUNCE_IN_OUT: case TWEEN_STYLE_BOUNCE_IN_OUT:
return BounceEaseInOut(pos); return BounceEaseInOut(pos);
default:
return pos;
} }
return pos; return pos;
} }
SYMBOL_EXPORT double GetTweenInterpolation(struct Tween* tween) { 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); 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 // Exponentially-decaying bounce easing
TWEEN_STYLE_BOUNCE_IN, TWEEN_STYLE_BOUNCE_IN,
TWEEN_STYLE_BOUNCE_OUT, 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/ :) } TWEEN_STYLE; // Cheet sheet at http://easings.net/ :)
struct Tween { struct Tween {
@ -76,6 +78,7 @@ struct Tween {
bool paused; bool paused;
bool done; bool done;
struct Game* game; struct Game* game;
double (*func)(double value);
void (*callback)(struct Game* game, struct Tween* tween, void* data); void (*callback)(struct Game* game, struct Tween* tween, void* data);
void* data; void* data;
}; };