| // 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 // import "golang.org/x/mobile/exp/sprite/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 |
