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from .render import GerberContext
from ..excellon import DrillSlot
from ..excellon_statements import *
class ExcellonContext(GerberContext):
MODE_DRILL = 1
MODE_SLOT =2
def __init__(self, settings):
GerberContext.__init__(self)
# Statements that we write
self.comments = []
self.header = []
self.tool_def = []
self.body_start = [RewindStopStmt()]
self.body = []
self.start = [HeaderBeginStmt()]
# Current tool and position
self.handled_tools = set()
self.cur_tool = None
self.drill_mode = ExcellonContext.MODE_DRILL
self.drill_down = False
self._pos = (None, None)
self.settings = settings
self._start_header()
self._start_comments()
def _start_header(self):
"""Create the header from the settings"""
self.header.append(UnitStmt.from_settings(self.settings))
def _start_comments(self):
# Write the digits used - this isn't valid Excellon statement, so we write as a comment
self.comments.append(CommentStmt('FILE_FORMAT=%d:%d' % (self.settings.format[0], self.settings.format[1])))
def _get_end(self):
"""How we end depends on our mode"""
end = []
if self.drill_down:
end.append(RetractWithClampingStmt())
end.append(RetractWithoutClampingStmt())
end.append(EndOfProgramStmt())
return end
@property
def statements(self):
return self.start + self.comments + self.header + self.body_start + self.body + self._get_end()
def set_bounds(self, bounds):
pass
def _paint_background(self):
pass
def _render_line(self, line, color):
raise ValueError('Invalid Excellon object')
def _render_arc(self, arc, color):
raise ValueError('Invalid Excellon object')
def _render_region(self, region, color):
raise ValueError('Invalid Excellon object')
def _render_level_polarity(self, region):
raise ValueError('Invalid Excellon object')
def _render_circle(self, circle, color):
raise ValueError('Invalid Excellon object')
def _render_rectangle(self, rectangle, color):
raise ValueError('Invalid Excellon object')
def _render_obround(self, obround, color):
raise ValueError('Invalid Excellon object')
def _render_polygon(self, polygon, color):
raise ValueError('Invalid Excellon object')
def _simplify_point(self, point):
return (point[0] if point[0] != self._pos[0] else None, point[1] if point[1] != self._pos[1] else None)
def _render_drill(self, drill, color):
if self.drill_mode != ExcellonContext.MODE_DRILL:
self._start_drill_mode()
tool = drill.hit.tool
if not tool in self.handled_tools:
self.handled_tools.add(tool)
self.header.append(ExcellonTool.from_tool(tool))
if tool != self.cur_tool:
self.body.append(ToolSelectionStmt(tool.number))
self.cur_tool = tool
point = self._simplify_point(drill.position)
self._pos = drill.position
self.body.append(CoordinateStmt.from_point(point))
def _start_drill_mode(self):
"""
If we are not in drill mode, then end the ROUT so we can do basic drilling
"""
if self.drill_mode == ExcellonContext.MODE_SLOT:
# Make sure we are retracted before changing modes
last_cmd = self.body[-1]
if self.drill_down:
self.body.append(RetractWithClampingStmt())
self.body.append(RetractWithoutClampingStmt())
self.drill_down = False
# Switch to drill mode
self.body.append(DrillModeStmt())
self.drill_mode = ExcellonContext.MODE_DRILL
else:
raise ValueError('Should be in slot mode')
def _render_slot(self, slot, color):
# Set the tool first, before we might go into drill mode
tool = slot.hit.tool
if not tool in self.handled_tools:
self.handled_tools.add(tool)
self.header.append(ExcellonTool.from_tool(tool))
if tool != self.cur_tool:
self.body.append(ToolSelectionStmt(tool.number))
self.cur_tool = tool
# Two types of drilling - normal drill and slots
if slot.hit.slot_type == DrillSlot.TYPE_ROUT:
# For ROUT, setting the mode is part of the actual command.
# Are we in the right position?
if slot.start != self._pos:
if self.drill_down:
# We need to move into the right position, so retract
self.body.append(RetractWithClampingStmt())
self.drill_down = False
# Move to the right spot
point = self._simplify_point(slot.start)
self._pos = slot.start
self.body.append(CoordinateStmt.from_point(point, mode="ROUT"))
# Now we are in the right spot, so drill down
if not self.drill_down:
self.body.append(ZAxisRoutPositionStmt())
self.drill_down = True
# Do a linear move from our current position to the end position
point = self._simplify_point(slot.end)
self._pos = slot.end
self.body.append(CoordinateStmt.from_point(point, mode="LINEAR"))
self.drill_down = ExcellonContext.MODE_SLOT
else:
# This is a G85 slot, so do this in normally drilling mode
if self.drill_mode != ExcellonContext.MODE_DRILL:
self._start_drill_mode()
# Slots don't use simplified points
self._pos = slot.end
self.body.append(SlotStmt.from_points(slot.start, slot.end))
def _render_inverted_layer(self):
pass
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