func (m *Map) DrawEdges(ctx *cairo.Surface) {
m.Edges.Do(func(f interface{}) {
e, _ := f.(*Edge)
e.Line().Draw(ctx)
})
m.Verticies.Do(func(v interface{}) {
ctx.SetSourceRGBA(0., 0., 0., 1.)
v.(*Vertex).Draw(ctx)
})
}
func (m *Map) DrawDebugEdges(ctx *cairo.Surface) {
m.Edges.Do(func(f interface{}) {
e, _ := f.(*Edge)
ctx.SetSourceRGBA(0., float64((e.Generation*20)%255)/255., 0., 1.)
e.Line().Draw(ctx)
})
m.Verticies.Do(func(v interface{}) {
ctx.SetSourceRGBA(0., 0., 0., 1.)
v.(*Vertex).Draw(ctx)
})
}
func (m *Map) ColourFaces(ctx *cairo.Surface, brush func(*Face) (float64, float64, float64, float64)) {
m.Faces.Do(func(f interface{}) {
F := f.(*Face)
ctx.SetSourceRGBA(brush(F))
e := F.boundary
ctx.MoveTo(e.start.Float64())
for f := e.Next(); f != e; f = f.Next() {
ctx.LineTo(f.start.Float64())
}
ctx.ClosePath()
ctx.Fill()
})
}
func (l *Line) DrawEndpoints(ctx *cairo.Surface) {
ctx.MoveTo(l.start.Float64())
ctx.LineTo(l.end.Float64())
ctx.Stroke()
l.start.Draw(ctx)
l.end.Draw(ctx)
}
func (p *Point) Draw(ctx *cairo.Surface) {
ctx.Arc(p.x.Float64(), p.y.Float64(), .1, 0., 2.*math.Pi)
ctx.Fill()
}
func (m *Map) ColourDebugFaces(ctx *cairo.Surface) {
n := float64(m.Faces.Len())
i := 0.
m.Faces.Do(func(f interface{}) {
F, _ := f.(*Face)
if F.Value.(string) == "outer" {
return
}
e := F.boundary
ctx.MoveTo(e.start.Float64())
for f := e.Next(); f != e; f = f.Next() {
ctx.LineTo(f.start.Float64())
}
ctx.ClosePath()
if F.Value.(string) == "skeleton" {
ctx.SetSourceRGBA(0., 0., 1., 1.)
} else {
ctx.SetSourceRGBA(i/n, 0., 0., 1.)
}
ctx.Fill()
i = i + 1.
})
}