func (tr *tegRenderer) renderConnection(t *transition, shiftT *geometry.Point,
p *place, shiftP *geometry.Point, inbound bool, index int) {
var control *controlPoint
var count int
if inbound {
control = p.outControl
count = len(t.in)
} else {
control = p.inControl
count = len(t.out)
}
xyC1 := control.Center()
xyC1.X, xyC1.Y = xyC1.X+shiftP.X, xyC1.Y+shiftP.Y
endT := calcBorderPointTransition(t, shiftT, inbound, count, index)
endP := calcBorderPointPlace(p, shiftP, xyC1.X, xyC1.Y)
var xyC2 *geometry.Point
var start, end *geometry.Point
if inbound {
if t.horizontal {
xyC2 = pt(endT.x, endT.y-Margin)
} else {
xyC2 = pt(endT.x-Margin, endT.y)
}
start = pt(endP.x, endP.y)
end = pt(endT.xTip, endT.yTip)
} else {
if t.horizontal {
xyC2 = pt(endT.x, endT.y+Margin)
} else {
xyC2 = pt(endT.x+Margin, endT.y)
}
start = pt(endT.x, endT.y)
end = pt(endP.xTip, endP.yTip)
xyC1, xyC2 = xyC2, xyC1
}
chain := render.NewChain(
tr.absPoint(tr.scalePoint(start)),
tr.absPoint(tr.scalePoint(xyC1)),
tr.absPoint(tr.scalePoint(xyC2)),
tr.absPoint(tr.scalePoint(end)),
)
chain.Style = &render.Style{
LineWidth: tr.scale(1.0),
Stroke: true,
StrokeStyle: ColorUtility,
}
tr.buf.Chains.Put(chain)
}
func (pr *planeRenderer) renderChain(points []*geometry.Point, color string) {
max := rpt(pr.canvasWidth, pr.canvasHeight)
firstX, lastY := pr.absX(pr.scaleX(points[0].X)), pr.absY(pr.scaleY(points[len(points)-1].Y))
pts := make([]*render.Point, 0, len(points)+2)
pts = append(pts, rpt(firstX, max.Y))
for i := 0; i < len(points); i++ {
if i > 0 {
p1 := points[i-1]
p2 := points[i]
pts = append(pts, pr.absPoint(pr.scalePoint(pt(p2.X, p1.Y))))
}
pts = append(pts, pr.absPoint(pr.scalePoint(points[i])))
}
pts = append(pts, rpt(max.X, lastY))
if pr.drawShadows {
for i := 0; i < len(pts)-1; i++ {
bg := &render.Rect{
Style: &render.Style{
Fill: true,
FillStyle: util.AlphaHex(color, 60),
},
X: pts[i].X, Y: pts[i].Y,
W: pts[i+1].X - pts[i].X,
H: max.Y - pts[i].Y,
}
pr.buf.Rects.Put(bg)
}
}
chain := render.NewChain(pts...)
chain.Style = &render.Style{
LineWidth: pr.scale(2.0),
Stroke: true,
StrokeStyle: color,
}
pr.buf.Chains.Put(chain)
}