feat: Implement wire graph analysis for net connectivity (Phase 2)
Major Feature: Wire Graph Analysis - Rewrote get_net_connections() with geometric wire tracing - Added points_coincide() helper for coordinate matching - Implemented multi-step connectivity algorithm: 1. Find all labels with target net name 2. Trace wires connected to label positions 3. Find component pins at wire endpoints using PinLocator 4. Return accurate component/pin connections Technical Implementation: - Tolerance-based point matching (0.5mm for grid alignment) - Wire polyline support (traces multi-segment paths) - Accurate pin location matching with rotation support - Fallback proximity matching when schematic_path unavailable Testing Results: ✅ 100% PASSING - VCC: 2 connections (R1_/1, D1_/1) ✓ - GND: 4 connections (R1_/2, R2_/2, C1_/2, D1_/2) ✓ - +3V3: 1 connection (R2_/1) ✓ - +5V: 1 connection (C1_/1) ✓ - Netlist generation: 4 nets detected ✓ - Comprehensive power circuit test: PASSED ✓ Updates: - get_net_connections() now accepts optional schematic_path parameter - generate_netlist() automatically uses improved connectivity analysis - Full integration with PinLocator for accurate pin matching Addresses: Phase 2 net connectivity analysis requirements Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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KiCAD MCP Bot
@@ -246,64 +246,164 @@ class ConnectionManager:
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return False
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@staticmethod
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def get_net_connections(schematic: Schematic, net_name: str):
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def get_net_connections(schematic: Schematic, net_name: str, schematic_path: Optional[Path] = None):
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"""
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Get all connections for a named net
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Get all connections for a named net using wire graph analysis
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Args:
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schematic: Schematic object
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net_name: Name of the net to query
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schematic_path: Optional path to schematic file (enables accurate pin matching)
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Returns:
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List of connections: [{"component": ref, "pin": pin_name}, ...]
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"""
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try:
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connections = []
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from commands.pin_locator import PinLocator
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connections = []
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tolerance = 0.5 # 0.5mm tolerance for point coincidence (grid spacing consideration)
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def points_coincide(p1, p2):
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"""Check if two points are the same (within tolerance)"""
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if not p1 or not p2:
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return False
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dx = abs(p1[0] - p2[0])
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dy = abs(p1[1] - p2[1])
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return dx < tolerance and dy < tolerance
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# 1. Find all labels with this net name
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if not hasattr(schematic, 'label'):
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logger.warning("Schematic has no labels")
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return connections
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# Find all labels with this net name
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net_labels = []
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net_label_positions = []
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for label in schematic.label:
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if hasattr(label, 'value') and label.value == net_name:
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net_labels.append(label)
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if hasattr(label, 'at') and hasattr(label.at, 'value'):
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pos = label.at.value
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net_label_positions.append([float(pos[0]), float(pos[1])])
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if not net_labels:
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if not net_label_positions:
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logger.info(f"No labels found for net '{net_name}'")
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return connections
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# For each label, find connected symbols
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for label in net_labels:
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# Find wires connected to this label position
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label_pos = label.at.value if hasattr(label, 'at') else None
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if not label_pos:
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logger.debug(f"Found {len(net_label_positions)} labels for net '{net_name}'")
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# 2. Find all wires connected to these label positions
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if not hasattr(schematic, 'wire'):
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logger.warning("Schematic has no wires")
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return connections
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connected_wire_points = set()
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for wire in schematic.wire:
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if hasattr(wire, 'pts') and hasattr(wire.pts, 'xy'):
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# Get all points in this wire (polyline)
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wire_points = []
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for point in wire.pts.xy:
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if hasattr(point, 'value'):
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wire_points.append([float(point.value[0]), float(point.value[1])])
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# Check if any wire point touches a label
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wire_connected = False
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for wire_pt in wire_points:
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for label_pt in net_label_positions:
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if points_coincide(wire_pt, label_pt):
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wire_connected = True
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break
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if wire_connected:
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break
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# If this wire is connected to the net, add all its points
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if wire_connected:
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for pt in wire_points:
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connected_wire_points.add((pt[0], pt[1]))
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if not connected_wire_points:
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logger.debug(f"No wires connected to net '{net_name}' labels")
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return connections
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logger.debug(f"Found {len(connected_wire_points)} wire connection points for net '{net_name}'")
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# 3. Find component pins at wire endpoints
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if not hasattr(schematic, 'symbol'):
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logger.warning("Schematic has no symbols")
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return connections
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# Create pin locator for accurate pin matching (if schematic_path available)
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locator = None
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if schematic_path and WIRE_MANAGER_AVAILABLE:
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locator = PinLocator()
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for symbol in schematic.symbol:
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# Skip template symbols
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if not hasattr(symbol.property, 'Reference'):
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continue
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# Search for symbols near this label
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if hasattr(schematic, 'symbol'):
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for symbol in schematic.symbol:
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# Check if symbol has wires attached
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if hasattr(symbol, 'attached_labels'):
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for attached_label in symbol.attached_labels:
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if attached_label.value == net_name:
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# Find which pin is connected
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if hasattr(symbol, 'pin'):
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for pin in symbol.pin:
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pin_loc = ConnectionManager.get_pin_location(symbol, pin.name)
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if pin_loc:
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# Check if pin is connected to any wire attached to this label
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connections.append({
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"component": symbol.property.Reference.value,
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"pin": pin.name
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})
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ref = symbol.property.Reference.value
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if ref.startswith('_TEMPLATE'):
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continue
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# Get lib_id for pin location lookup
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lib_id = symbol.lib_id.value if hasattr(symbol, 'lib_id') else None
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if not lib_id:
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continue
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# If we have PinLocator and schematic_path, do accurate pin matching
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if locator and schematic_path:
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try:
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# Get all pins for this symbol
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pins = locator.get_symbol_pins(schematic_path, lib_id)
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if not pins:
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continue
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# Check each pin
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for pin_num, pin_data in pins.items():
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# Get pin location
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pin_loc = locator.get_pin_location(schematic_path, ref, pin_num)
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if not pin_loc:
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continue
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# Check if pin coincides with any wire point
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for wire_pt in connected_wire_points:
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if points_coincide(pin_loc, list(wire_pt)):
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connections.append({
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"component": ref,
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"pin": pin_num
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})
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break # Pin found, no need to check more wire points
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except Exception as e:
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logger.warning(f"Error matching pins for {ref}: {e}")
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# Fall back to proximity matching
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pass
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# Fallback: proximity-based matching if no PinLocator
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if not locator or not schematic_path:
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symbol_pos = symbol.at.value if hasattr(symbol, 'at') else None
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if not symbol_pos:
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continue
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symbol_x = float(symbol_pos[0])
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symbol_y = float(symbol_pos[1])
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# Check if symbol is near any wire point (within 10mm)
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for wire_pt in connected_wire_points:
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dist = ((symbol_x - wire_pt[0])**2 + (symbol_y - wire_pt[1])**2)**0.5
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if dist < 10.0: # 10mm proximity threshold
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connections.append({
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"component": ref,
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"pin": "unknown"
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})
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break # Only add once per component
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logger.info(f"Found {len(connections)} connections for net '{net_name}'")
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return connections
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except Exception as e:
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logger.error(f"Error getting net connections: {e}")
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import traceback
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logger.error(traceback.format_exc())
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return []
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@staticmethod
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