Adding upstream version 0.0~git20250520.a1d9079+dfsg.

Signed-off-by: Daniel Baumann <daniel@debian.org>

exp/sprite/clock/clock.go

@@ -0,0 +1,26 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package clock provides a clock and time functions for a sprite engine.
+package clock
+
+// A Time represents an instant in sprite time.
+//
+// The application using the sprite engine is responsible for
+// determining sprite time.
+//
+// Typically time 0 is when the app is initialized and time is
+// quantized at the intended frame rate. For example, an app may
+// record wall time when it is initialized
+//
+//	var start = time.Now()
+//
+// and then compute the current instant in time for 60 FPS:
+//
+//	now := clock.Time(time.Since(start) * 60 / time.Second)
+//
+// An application can pause or reset sprite time, but it must be aware
+// of any stateful sprite.Arranger instances that expect time to
+// continue.
+type Time int32