Warm up application update function before first render.

2 files changed, 12 insertions, 8 deletions

diff --git a/gfx-app/include/gfx/gfx_app.h b/gfx-app/include/gfx/gfx_app.h
index bdb3550..4744992 100644
--- a/gfx-app/include/gfx/gfx_app.h
+++ b/gfx-app/include/gfx/gfx_app.h
@@ -3,12 +3,12 @@
 #include <stdbool.h>
 
 typedef struct GfxAppDesc {
-  int argc;                 // Number of application arguments.
-  const char** argv;        // Application arguments.
-  int width;                // Window width.
-  int height;               // Window height.
-  int max_fps;              // Desired maximum framerate. 0 to disable.
-  double update_delta_time; // Desired delta time between frame updates.
+  int          argc;    // Number of application arguments.
+  const char** argv;    // Application arguments.
+  int          width;   // Window width.
+  int          height;  // Window height.
+  int          max_fps; // Desired maximum display framerate. 0 to disable.
+  double       update_delta_time; // Desired delta time between frame updates.
 } GfxAppDesc;
 
 typedef struct GfxAppCallbacks {
diff --git a/gfx-app/src/gfx_app.c b/gfx-app/src/gfx_app.c
index 018e997..31f8448 100644
--- a/gfx-app/src/gfx_app.c
+++ b/gfx-app/src/gfx_app.c
@@ -37,8 +37,12 @@ static void loop(GfxApp* app) {
   double       time_budget = 0.0;
   Timer        timer       = timer_make();
 
-  // Warm up the rendering before entering the main loop. A renderer can compile
-  // shaders and do other initialization the first time it renders a scene.
+  // Warm up the update to initialize the application's state.
+  (*app->callbacks.update)(app->app_state, time, 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
+  // scene.
   (*app->callbacks.render)(app->app_state);
   glfwSwapBuffers(app->window);