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Use the term 'TPS' ticks per second

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This commit is contained in:
Hajime Hoshi 2018-07-16 04:36:47 +09:00
parent bbb777eecc
commit 88e6768a30
2 changed files with 14 additions and 10 deletions
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10
internal/clock/clock.go
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@ -64,7 +64,7 @@ func updateFPS(now int64) {
// Update updates the inner clock state and returns an integer value
// indicating how many game frames the game should update.
func Update(logicFPS int) int {
func Update(tps int) int {
m.Lock()
defer m.Unlock()
@ -95,15 +95,15 @@ func Update(logicFPS int) int {
// Let's force to sync the game time with the system clock.
syncWithSystemClock = true
} else {
count = int(diff * int64(logicFPS) / int64(time.Second))
count = int(diff * int64(tps) / int64(time.Second))
}
// Stabilize FPS.
// Without this adjustment, count can be unstable like 0, 2, 0, 2, ...
if count == 0 && (int64(time.Second)/int64(logicFPS)/2) < diff {
if count == 0 && (int64(time.Second)/int64(tps)/2) < diff {
count = 1
}
if count == 2 && (int64(time.Second)/int64(logicFPS)*3/2) > diff {
if count == 2 && (int64(time.Second)/int64(tps)*3/2) > diff {
count = 1
}
@ -111,7 +111,7 @@ func Update(logicFPS int) int {
if syncWithSystemClock {
lastSystemTime = n
} else {
lastSystemTime += int64(count) * int64(time.Second) / int64(logicFPS)
lastSystemTime += int64(count) * int64(time.Second) / int64(tps)
}
updateFPS(n)

14
run.go
View File

@ -30,13 +30,15 @@ import (
)
// FPS represents how many times game updating happens in a second (60).
//
// BUG: This actually represents TPS, not FPS.
const FPS = 60
// CurrentFPS returns the current number of frames per second of rendering.
//
// The returned value represents how many times rendering happens in a second and
// NOT how many times logical game updating (a passed function to Run) happens.
// Note that logical game updating is assured to happen 60 times in a second.
// The returned value FPS (frames per second) that represents how many times rendering happens in a
// second and NOT TPS (ticks per second) that represents how many times logical game updating (a
// passed function to Run) happens in a second.
//
// CurrentFPS is concurrent-safe.
func CurrentFPS() float64 {
@ -250,8 +252,10 @@ func (i *imageDumper) update(screen *Image) error {
// Run must be called from the OS main thread.
// Note that Ebiten bounds the main goroutine to the main OS thread by runtime.LockOSThread.
//
// The given function f is guaranteed to be called 60 times a second
// even if a rendering frame is skipped.
// Ebiten tries to call f 60 times a second. In other words,
// TPS (ticks per second) is 60.
// This is not related to framerate (display's frashrate).
//
// f is not called when the window is in background by default.
// This setting is configurable with SetRunnableInBackground.
//