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account for non-orthogonal connection segments

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Gavin Nishizawa 2023-04-24 20:05:00 -07:00
parent e6e9673ddd
commit 228ef4e65b
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GPG key ID: AE3B177777CE55CD
1 changed files with 7 additions and 16 deletions
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23
d2target/d2target.go
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@ -553,19 +553,13 @@ func (connection *Connection) GetArrowheadLabelPosition(isDst bool) *geo.Point {
index = len(connection.Route) - 2
}
start, end := connection.Route[index], connection.Route[index+1]
// Note: end to start to get normal towards unlocked top position
normalX, normalY := geo.GetUnitNormalVector(end.X, end.Y, start.X, start.Y)
// how much to move the label back from the very end of the edge
var shift float64
if start.Y == end.Y {
// shift left/right to fit on horizontal segment
shift = width/2. + label.PADDING
} else if start.X == end.X {
// shift up/down to fit on vertical segment
shift = height/2. + label.PADDING
} else {
// TODO compute amount to shift according to angle instead of max
shift = math.Max(width, height)
}
// determine how much to move the label back from the very end of the edge
// e.g. if normal points up {x: 0, y:1}, shift width/2 + padding to fit
shift := math.Abs(normalX)*(height/2.+label.PADDING) +
math.Abs(normalY)*(width/2.+label.PADDING)
length := geo.Route(connection.Route).Length()
var position float64
@ -583,7 +577,7 @@ func (connection *Connection) GetArrowheadLabelPosition(isDst bool) *geo.Point {
strokeWidth := float64(connection.StrokeWidth)
labelTL, index := label.UnlockedTop.GetPointOnRoute(connection.Route, strokeWidth, position, width, height)
labelTL, _ := label.UnlockedTop.GetPointOnRoute(connection.Route, strokeWidth, position, width, height)
var arrowSize float64
if isDst && connection.DstArrow != NoArrowhead {
@ -597,9 +591,6 @@ func (connection *Connection) GetArrowheadLabelPosition(isDst bool) *geo.Point {
// labelTL already accounts for strokeWidth and padding, we only want to shift further if the arrow is larger than this
offset := (arrowSize/2 + ARROWHEAD_PADDING) - strokeWidth/2 - label.PADDING
if offset > 0 {
start, end = connection.Route[index], connection.Route[index+1]
// Note: end to start to get normal towards unlocked top position
normalX, normalY := geo.GetUnitNormalVector(end.X, end.Y, start.X, start.Y)
labelTL.X += normalX * offset
labelTL.Y += normalY * offset
}