From 02ec7cd07213e267fda7e1e67b62f55e92a2f32c Mon Sep 17 00:00:00 2001
From: 3gg <3gg@shellblade.net>
Date: Sat, 20 Jan 2024 15:48:02 -0800
Subject: Use time_delta instead of double to track time.
---
gfx-app/src/gfx_app.c | 24 ++++++++++++++----------
1 file changed, 14 insertions(+), 10 deletions(-)
diff --git a/gfx-app/src/gfx_app.c b/gfx-app/src/gfx_app.c
index 2d54e3d..a313ce8 100644
--- a/gfx-app/src/gfx_app.c
+++ b/gfx-app/src/gfx_app.c
@@ -30,15 +30,16 @@ static void loop(GfxApp* app) {
assert(app);
assert(app->window);
- const double min_frame_time =
- app->max_fps > 0 ? 1.0 / (double)(app->max_fps) : 0.0;
- const double update_dt = app->update_delta_time;
- double time = 0.0;
- double time_budget = 0.0;
- Timer timer = timer_make();
+ const time_delta min_frame_time =
+ app->max_fps > 0 ? sec_to_time_delta(1.0 / (double)(app->max_fps)) : 0;
+ const time_delta update_dt = sec_to_time_delta(app->update_delta_time);
+ time_delta time = 0;
+ time_delta time_budget = 0;
+ Timer timer = timer_make();
// Warm up the update to initialize the application's state.
- (*app->callbacks.update)(app->app_state, time, update_dt);
+ (*app->callbacks.update)(
+ app->app_state, time_delta_to_sec(time), time_delta_to_sec(update_dt));
// Warm up the rendering before entering the main loop. A renderer can
// compile shaders and do other initialization the first time it renders a
@@ -49,10 +50,13 @@ static void loop(GfxApp* app) {
timer_start(&timer);
while (!glfwWindowShouldClose(app->window)) {
timer_tick(&timer);
- time_budget += time_delta_to_sec(timer.delta_time);
+ time_budget += timer.delta_time;
while (time_budget >= update_dt) {
- (*app->callbacks.update)(app->app_state, time, update_dt);
+ (*app->callbacks.update)(
+ app->app_state, time_delta_to_sec(time),
+ time_delta_to_sec(update_dt));
+
time += update_dt;
time_budget -= update_dt;
}
@@ -63,7 +67,7 @@ static void loop(GfxApp* app) {
const time_point frame_end = time_now();
const time_delta frame_time = time_diff(timer.last_tick, frame_end);
- if (min_frame_time > 0.0 && frame_time < min_frame_time) {
+ if ((min_frame_time > 0) && (frame_time < min_frame_time)) {
time_sleep(min_frame_time - frame_time);
}
}
--
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