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clockface: refactor

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This commit is contained in:
vinchent 2024-09-23 22:18:46 +02:00
parent a4531bde4c
commit c6ef156d88
1 changed files with 8 additions and 12 deletions
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20
clockface/clockface.go
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@ -43,23 +43,19 @@ func SVGWriter(w io.Writer, t time.Time) {
// SecondHand is the unit vector of the second hand of an analogue clock at the time `t` represented as a Point
func secondHand(w io.Writer, t time.Time) {
p := secondHandPoint(t)
p = Point{p.X * secondHandLength, p.Y * secondHandLength} // scale
p = Point{p.X, -p.Y} // flip
p = Point{p.X + clockCentreX, p.Y + clockCentreY} // translate
fmt.Fprintf(
w,
`<line x1="150" y1="150" x2="%f" y2="%f" style="fill:none;stroke:#f00;stroke-width:3px;"/>`,
p.X,
p.Y,
)
makeHand(w, secondHandLength, p)
}
// MinuteHand is the unit vector of the minute hand of an analogue clock at the time `t` represented as a Point
func minuteHand(w io.Writer, t time.Time) {
p := minuteHandPoint(t)
p = Point{p.X * minuteHandLength, p.Y * minuteHandLength} // scale
p = Point{p.X, -p.Y} // flip
p = Point{p.X + clockCentreX, p.Y + clockCentreY} // translate
makeHand(w, minuteHandLength, p)
}
func makeHand(w io.Writer, length float64, p Point) {
p = Point{p.X * length, p.Y * length} // scale
p = Point{p.X, -p.Y} // flip
p = Point{p.X + clockCentreX, p.Y + clockCentreY} // translate
fmt.Fprintf(
w,
`<line x1="150" y1="150" x2="%f" y2="%f" style="fill:none;stroke:#f00;stroke-width:3px;"/>`,