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momento
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Automatic frameskip

This commit is contained in:
KikooDX 2021-04-27 00:52:03 +02:00
parent f9df721d54
commit b63bbd3148
2 changed files with 17 additions and 10 deletions
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3
include/conf.h
View File

@ -7,8 +7,7 @@
#define TILE_WIDTH 16
#define TILE_HEIGHT 16
#define TILESET_WIDTH 16
#define TARGET_FPS 30
#define TARGET_UPS 60
#define TARGET_FPS 60
#define LVL_PER_PACK 4
#define ACC_GND 0.1
#define ACC_AIR 0.025

24
src/main.c
View File

@ -43,13 +43,15 @@ extern char *fatal_error_msg;
extern const font_t font_main;
static int callback(volatile void *arg);
static int callback(volatile int *arg);
int main(void)
{
int i;
int timer;
int player_return_code;
int frameskip = 0;
int toskip = 0;
/* int level_pack_beaten; */
enum TransitionMode transition_previous_mode;
enum GameState game_state = TitleScreen;
@ -74,7 +76,7 @@ int main(void)
PANIC(fatal_error_msg);
/* timer setup */
timer =
timer_setup(TIMER_ANY, 1000000 / TARGET_UPS, callback, &has_ticked);
timer_setup(TIMER_ANY, 1000000 / TARGET_FPS, callback, &has_ticked);
if (timer == -1)
PANIC("timer_setup failed");
timer_start(timer);
@ -84,13 +86,19 @@ int main(void)
/* main game loop */
while (!keydown(KEY_EXIT)) {
/* do x updates per frame, x being ups/fps */
i = TARGET_UPS / TARGET_FPS;
/* skip render frames */
i = 1 + frameskip;
toskip = frameskip;
while (i-- > 0) {
/* frameskip adjustement */
if (has_ticked - 1 > frameskip)
frameskip = has_ticked - 1;
/* speed limiter */
while (!has_ticked)
sleep();
has_ticked = 0;
while (has_ticked)
has_ticked = 0;
/* update */
input_update(&input);
@ -204,6 +212,7 @@ int main(void)
case Playing:
level_draw();
particles_draw();
trail_draw();
player_draw(player);
transition_draw(transition);
break;
@ -222,9 +231,8 @@ int main(void)
return 1;
}
static int callback(volatile void *arg)
static int callback(volatile int *arg)
{
volatile int *has_ticked = arg;
*has_ticked = 1;
*arg += 1;
return 0;
}