Iterative way to add track points

[osresearch]

For tracks that have to cross multiple reference frames it is helpful to be able to add points to them, where each new point is computed in the current matrix. I hacked something together in my code to do this, which might be useful to figure out how to add it to the library.

class Track:
        def __init__(self, painter, net=None):
                self.painter = painter
                self.net = net
                self.prev = None
        def add(self, x, y):
                new_xy = self.painter._local_to_world(x,y)
                if self.prev is None:
                        self.prev = new_xy
                        return

                track = pcbnew.PCB_TRACK(self.painter.pcb)
                track.SetWidth(pcbnew.FromMM(self.painter.draw_width))
                track.SetLayer(self.painter.layers[self.painter.draw_layer])
                if self.net is not None:
                        track.SetNet(self.painter._find_net(self.net))
                track.SetStart(self.prev)
                track.SetEnd(new_xy)
                self.prev = new_xy
                return self.painter._add_item(track)

[osresearch]

Slightly improved version adds layer tracking and will create vias if the layer changes.

class Track:
        def __init__(self, painter, net=None, via=(0.2,0.4)):
                self.painter = painter
                self.net = net
                self.via = via
                self.prev = None
                self.layer = None
        def add(self, x, y, world=False):
                if world:
                        #new_xy = (int(x), int(y))
                        (x,y) = self.painter._world_to_local(x,y)
                new_xy = self.painter._local_to_world(x,y)

                if self.prev is None:
                        self.prev = new_xy
                        return

                track = pcbnew.PCB_TRACK(self.painter.pcb)
                track.SetWidth(pcbnew.FromMM(self.painter.draw_width))

                new_layer = self.painter.layers[self.painter.draw_layer]

                # the via needs to be added in the *OLD* reference frame
                if self.layer is not None and self.layer != new_layer:
                        old_local = self.painter._world_to_local(*self.prev)
                        self.painter.via(*old_local, net=self.net, d=self.via[0], w=self.via[1])
                self.layer = new_layer

                track.SetLayer(self.layer)

                if self.net is not None:
                        track.SetNet(self.painter._find_net(self.net))

                track.SetStart(self.prev)
                track.SetEnd(new_xy)
                self.prev = new_xy
                return self.painter._add_item(track)

[cibomahto]

Neat! We should include it. I think it should have a different name, to disambiguate from board tracks- maybe Route?