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/*
* animation.h
*
* Created by buzzert <buzzert@buzzert.net> 2019-01-20
*/
#pragma once
#include <stdbool.h>
#include <time.h>
typedef double anim_time_interval_t;
struct animation_t;
typedef void(*AnimationCompletion)(struct animation_t *anim, void *context);
typedef enum {
IN,
OUT
} AnimationDirection;
typedef enum {
_EmptyAnimationType,
ACursorAnimation,
ALogoAnimation,
ARedFlashAnimation,
ASpinnerAnimation,
} AnimationType;
// Cursor flash animation
typedef struct {
bool cursor_animating;
} CursorAnimation;
// Logo transition in/out animation
typedef struct {
} LogoAnimation;
// Red flash for incorrect password
typedef struct {
unsigned flash_count;
} RedFlashAnimation;
// Spinner shown when checking password
typedef struct {
double rotation;
} SpinnerAnimation;
typedef union {
CursorAnimation cursor_anim;
LogoAnimation logo_anim;
RedFlashAnimation redflash_anim;
SpinnerAnimation spinner_anim;
} Animation;
typedef struct {
AnimationType type;
Animation anim;
bool completed;
anim_time_interval_t start_time;
AnimationDirection direction;
AnimationCompletion completion_func;
void *completion_func_context;
} animation_t;
// Convenience functions
// returns current time as anim_time_interval_t
anim_time_interval_t anim_now();
// Easing functions
typedef double(*AnimationEasingFunc)(double in);
double anim_identity(double p);
double anim_qubic_ease_out(double p);
double anim_quad_ease_out(double p);
// Returns normalized progress based on start time of `anim` and `duration`
double anim_progress(animation_t *anim, const double duration);
double anim_progress_ease(animation_t *anim, const double duration, AnimationEasingFunc easing_func);
// Returns true if `anim` is complete depending on direction
bool anim_complete(animation_t *anim, const double progress);
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