From dcbe0949a218df0dae8e3cdc85f62a2236cbeae7 Mon Sep 17 00:00:00 2001
From: Serge Bazanski <q3k@q3k.org>
Date: Sun, 4 Jun 2023 15:26:01 +0200
Subject: [PATCH] demo_worms: add primitive frame limiter
---
python_payload/demo_worms.py | 26 +++++++++++++++++++++++++-
1 file changed, 25 insertions(+), 1 deletion(-)
diff --git a/python_payload/demo_worms.py b/python_payload/demo_worms.py
index 87a11a5989..066b66897e 100644
--- a/python_payload/demo_worms.py
+++ b/python_payload/demo_worms.py
@@ -85,13 +85,37 @@ def init():
worms.append(Worm())
ctx = hardware.get_ctx()
+# TODO(q3k): factor out frame limiter
+last_render = None
+target_fps = 30
+target_delta = 1000 / target_fps
+frame_slack = None
+last_report = None
def run():
+ global last_render
+ global last_report
+ global frame_slack
+ now = time.ticks_ms()
+
+ if last_render is not None:
+ delta = now - last_render
+ if frame_slack is None:
+ frame_slack = target_delta - delta
+ if delta < target_delta:
+ return
+
+ if last_report is None or (now - last_report) > 1000:
+ fps = 1000/delta
+ print(f'fps: {fps:.3}, frame budget slack: {frame_slack:.3}ms')
+ last_report = now
+
+ # Simulation is currently locked to FPS.
global worms
for w in worms:
w.draw()
w.move()
hardware.display_update()
- time.sleep(0.001)
+ last_render = now
def foreground():
--
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