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clockface: refactor magic numbers

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This commit is contained in:
vinchent 2024-09-23 22:40:35 +02:00
parent 6837cd9fc1
commit ef646bf98e
1 changed files with 12 additions and 3 deletions
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15
clockface/clockface.go
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@ -21,6 +21,15 @@ const (
clockCentreY = 150
)
const (
secondsInHalfClock = 30
secondsInClock = 2 * secondsInHalfClock
minutesInHalfClock = 30
minutesInClock = 2 * minutesInHalfClock
hoursInHalfClock = 6
hoursInClock = 2 * hoursInHalfClock
)
const svgStart = `<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg xmlns="http://www.w3.org/2000/svg"
@ -73,7 +82,7 @@ func makeHand(w io.Writer, length float64, p Point) {
}
func hoursInRadians(t time.Time) float64 {
return (minutesInRadians(t) / 12) + math.Pi/(6/float64(t.Hour()%12))
return (minutesInRadians(t) / hoursInClock) + math.Pi/(hoursInHalfClock/float64(t.Hour()%hoursInClock))
}
func hourHandPoint(t time.Time) Point {
@ -81,7 +90,7 @@ func hourHandPoint(t time.Time) Point {
}
func minutesInRadians(t time.Time) float64 {
return (secondsInRadians(t) / 60) + math.Pi/(30/float64(t.Minute()))
return (secondsInRadians(t) / minutesInClock) + math.Pi/(minutesInHalfClock/float64(t.Minute()))
}
func minuteHandPoint(t time.Time) Point {
@ -89,7 +98,7 @@ func minuteHandPoint(t time.Time) Point {
}
func secondsInRadians(t time.Time) float64 {
return math.Pi / (30 / float64(t.Second()))
return math.Pi / (secondsInHalfClock / float64(t.Second()))
}
func secondHandPoint(t time.Time) Point {