How can I calculate the midpoint for arc tracks in PCB layouts using Python in KiCad?
Calculating the midpoint for arc tracks in PCB layouts in KiCad can be achieved using Python. The script provided includes a method to calculate the midpoint of a 90-degree arc track between two pads:

```python
import pcbnew
import math
from pcbnew import wxPoint, wxPointMM

def add_track_arc(start, mid, end, layer=pcbnew.F_Cu):
    board = pcbnew.GetBoard()
    track = pcbnew.PCB_ARC(board)
    track.SetStart(start)
    track.SetMid(mid)
    track.SetEnd(end)
    track.SetWidth(int(0.25 * 1e6))
    track.SetLayer(layer)
    board.Add(track)

# Script to calculate midpoint for arc track
# ... (rest of the script with mathematical calculations for midpoint)
add_track_arc(start1, mid, end1)

pcbnew.Refresh()
```

This method is particularly useful for designing PCBs with arc-shaped tracks, where precise control over the track shape is required.