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clock.go
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clock.go
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package engine
import (
"github.com/dayaftereh/discover/server/utils"
)
type Clock struct {
startTime float64
elapsedTime float64
oldTime float64
running bool
}
func NewClock() *Clock {
return &Clock{
running: false,
}
}
func (clock *Clock) StarTime() float64 {
return clock.startTime / 1000.0 // to seconds
}
func (clock *Clock) ElapsedTime() float64 {
return clock.elapsedTime / 1000.0 // to seconds
}
func (clock *Clock) Start() {
clock.running = true
clock.elapsedTime = 0.0
clock.startTime = utils.SystemMillis()
clock.oldTime = clock.startTime
}
func (clock *Clock) Stop() {
clock.Delta()
clock.running = false
}
func (clock *Clock) Delta() float64 {
if !clock.running {
clock.Start()
return 0.0
}
newTime := utils.SystemMillis()
diff := newTime - clock.oldTime
clock.oldTime = newTime
clock.elapsedTime += diff
return diff / 1000.0 // to seconds
}