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import math
import os
import re
from dataclasses import dataclass
from pathlib import Path
TARGET = Path(os.environ.get("EVAL_TARGET_DIR", r"C:\Users\User\Desktop"))
NC_NAME = "task-05.nc"
TOOL_CONTRACT = {
1: {"diameter": 16.0, "spindle": 7000.0, "feed": 500.0},
2: {"diameter": 8.0, "spindle": 8000.0, "feed": 450.0},
3: {"diameter": 5.0, "spindle": 5000.0, "feed": 180.0},
}
HOLES = [(-35.0, -20.0), (-35.0, 20.0), (35.0, -20.0), (35.0, 20.0)]
WORD_RE = re.compile(r"([A-Z])\s*([+-]?(?:\d+(?:\.\d*)?|\.\d+))")
class EvaluationError(ValueError):
pass
@dataclass(frozen=True)
class Point:
x: float
y: float
z: float
@dataclass
class Segment:
start: Point
end: Point
samples: list[Point]
motion: int
tool: int | None
spindle: float | None
spindle_on: bool
feed: float | None
wcs: str | None
length_comp: bool
h_offset: int | None
comp: int
d_offset: int | None
machine_coordinates: bool
line_number: int
@dataclass
class Program:
segments: list[Segment]
tool_changes: list[int]
terminated: bool
explicit_units: bool
explicit_distance_mode: bool
executable_lines: int
def close(a: float, b: float, tol: float) -> bool:
return abs(a - b) <= tol
def distance(a: Point, b: Point) -> float:
return math.dist((a.x, a.y, a.z), (b.x, b.y, b.z))
def dense_line(start: Point, end: Point, spacing: float = 1.0) -> list[Point]:
count = max(1, int(math.ceil(distance(start, end) / spacing)))
return [
Point(
start.x + (end.x - start.x) * i / count,
start.y + (end.y - start.y) * i / count,
start.z + (end.z - start.z) * i / count,
)
for i in range(count + 1)
]
def strip_comments(src: str) -> list[tuple[int, str]]:
out: list[tuple[int, str]] = []
depth = 0
for line_number, raw in enumerate(src.upper().splitlines(), 1):
clean: list[str] = []
for char in raw:
if char == ";" and depth == 0:
break
if char == "(":
depth += 1
elif char == ")":
if depth == 0:
raise EvaluationError("unmatched comment close")
depth -= 1
elif depth == 0:
clean.append(char)
out.append((line_number, "".join(clean).strip()))
if depth:
raise EvaluationError("unterminated comment")
return out
def arc_points(start: Point, end: Point, i: float, j: float, clockwise: bool) -> list[Point]:
cx, cy = start.x + i, start.y + j
radius = math.hypot(start.x - cx, start.y - cy)
if radius <= 1e-6 or not close(math.hypot(end.x - cx, end.y - cy), radius, 0.25):
raise EvaluationError("invalid I/J arc")
a0 = math.atan2(start.y - cy, start.x - cx)
a1 = math.atan2(end.y - cy, end.x - cx)
sweep = (a0 - a1) % (2 * math.pi) if clockwise else (a1 - a0) % (2 * math.pi)
if sweep <= 1e-9:
sweep = 2 * math.pi
direction = -1.0 if clockwise else 1.0
count = max(12, int(math.ceil(radius * sweep)))
return [
Point(
cx + radius * math.cos(a0 + direction * sweep * k / count),
cy + radius * math.sin(a0 + direction * sweep * k / count),
start.z + (end.z - start.z) * k / count,
)
for k in range(count + 1)
]
def parse_program(src: str) -> Program:
units: str | None = None
absolute: bool | None = None
motion: int | None = None
current = Point(0.0, 0.0, 0.0)
pending_tool: int | None = None
tool: int | None = None
spindle: float | None = None
spindle_on = False
feed: float | None = None
wcs: str | None = None
length_comp = False
h_offset: int | None = None
comp = 40
d_offset: int | None = None
cycle: int | None = None
cycle_z: float | None = None
cycle_r: float | None = None
terminated = False
executable_lines = 0
segments: list[Segment] = []
tool_changes: list[int] = []
for line_number, line in strip_comments(src):
if not line or line == "%":
continue
if any(ch in line for ch in "#[]="):
raise EvaluationError("macros and expressions are unsupported")
found = WORD_RE.findall(line)
if not found:
if re.fullmatch(r"O\d+", line):
continue
raise EvaluationError(f"unparsed text on line {line_number}")
residue = WORD_RE.sub("", line)
residue = re.sub(r"[\s/]+", "", residue)
if residue:
raise EvaluationError(f"unknown executable text on line {line_number}")
if terminated:
raise EvaluationError("executable code after M30")
executable_lines += 1
grouped: dict[str, list[float]] = {}
for letter, value in found:
grouped.setdefault(letter, []).append(float(value))
gcodes = grouped.get("G", [])
mcodes = [int(round(v)) for v in grouped.get("M", [])]
machine_coordinates = any(close(g, 53.0, 1e-6) for g in gcodes)
reference_return = any(close(g, 28.0, 1e-6) for g in gcodes)
for g in gcodes:
gi = int(round(g))
if close(g, 20.0, 1e-6):
units = "inch"
elif close(g, 21.0, 1e-6):
units = "mm"
elif close(g, 90.0, 1e-6):
absolute = True
elif close(g, 91.0, 1e-6):
absolute = False
elif gi in (0, 1, 2, 3) and close(g, gi, 1e-6):
motion = gi
elif gi in (54, 55, 56, 57, 58, 59) and close(g, gi, 1e-6):
wcs = f"G{gi}"
elif close(g, 43.0, 1e-6):
length_comp = True
elif close(g, 49.0, 1e-6):
length_comp = False
h_offset = None
elif gi in (40, 41, 42) and close(g, gi, 1e-6):
comp = gi
if gi == 40:
d_offset = None
elif gi in (81, 82, 83) and close(g, gi, 1e-6):
cycle = gi
elif gi == 80 and close(g, 80.0, 1e-6):
cycle = None
elif close(g, 17.0, 1e-6) or close(g, 28.0, 1e-6) or close(g, 94.0, 1e-6) or close(g, 98.0, 1e-6) or close(g, 99.0, 1e-6) or close(g, 53.0, 1e-6):
pass
elif close(g, 54.1, 1e-6):
p = int(round(grouped.get("P", [0])[-1]))
if p <= 0:
raise EvaluationError("invalid G54.1 offset")
wcs = f"G54.1P{p}"
else:
raise EvaluationError(f"unsupported G code G{g:g}")
factor = 25.4 if units == "inch" else 1.0
if "T" in grouped:
pending_tool = int(round(grouped["T"][-1]))
if "S" in grouped:
spindle = grouped["S"][-1]
if "F" in grouped:
feed = grouped["F"][-1] * factor
if "H" in grouped:
h_offset = int(round(grouped["H"][-1]))
if "D" in grouped:
d_offset = int(round(grouped["D"][-1]))
if 6 in mcodes:
if pending_tool is None:
raise EvaluationError("M6 without tool")
tool = pending_tool
tool_changes.append(tool)
if 3 in mcodes or 4 in mcodes:
spindle_on = True
if 5 in mcodes:
spindle_on = False
if 30 in mcodes:
terminated = True
if absolute is None and any(k in grouped for k in ("X", "Y", "Z")):
raise EvaluationError("motion before explicit G90/G91")
if units is None and any(k in grouped for k in ("X", "Y", "Z", "F")):
raise EvaluationError("motion before explicit G20/G21")
def coord(axis: str, old: float) -> float:
if axis not in grouped:
return old
value = grouped[axis][-1] * factor
return value if absolute else old + value
new = Point(coord("X", current.x), coord("Y", current.y), coord("Z", current.z))
if reference_return:
# G28 traverses from the programmed intermediate point to a
# controller-defined machine reference point. The second leg is
# outside work coordinates and must not be invented as part
# geometry. Native M3Axis output uses G91 G28 with zero deltas,
# so retaining the intermediate point is sufficient until the
# following absolute G54 move.
current = new
continue
if cycle is not None and any(k in grouped for k in ("X", "Y", "Z")):
if "Z" in grouped:
cycle_z = new.z
if "R" in grouped:
raw_r = grouped["R"][-1] * factor
cycle_r = raw_r if absolute else current.z + raw_r
if cycle_z is None or cycle_r is None:
raise EvaluationError("incomplete drilling cycle")
xy = Point(new.x, new.y, current.z)
top = Point(new.x, new.y, cycle_r)
bottom = Point(new.x, new.y, cycle_z)
segments.append(Segment(xy, top, dense_line(xy, top), 0, tool, spindle, spindle_on, feed, wcs, length_comp, h_offset, comp, d_offset, False, line_number))
segments.append(Segment(top, bottom, dense_line(top, bottom), 1, tool, spindle, spindle_on, feed, wcs, length_comp, h_offset, comp, d_offset, False, line_number))
current = top
continue
if any(k in grouped for k in ("X", "Y", "Z")) and motion is not None:
if motion in (2, 3):
if "I" not in grouped or "J" not in grouped:
raise EvaluationError("arcs require I/J")
samples = arc_points(current, new, grouped["I"][-1] * factor, grouped["J"][-1] * factor, motion == 2)
else:
samples = dense_line(current, new)
segments.append(Segment(current, new, samples, motion, tool, spindle, spindle_on, feed, wcs, length_comp, h_offset, comp, d_offset, machine_coordinates, line_number))
current = new
return Program(segments, tool_changes, terminated, units is not None, absolute is not None, executable_lines)
def cutting_segments(program: Program, tool: int) -> list[Segment]:
return [s for s in program.segments if s.tool == tool and s.motion in (1, 2, 3) and distance(s.start, s.end) > 1e-5]
def validate_common(program: Program) -> None:
if not program.terminated or not program.explicit_units or not program.explicit_distance_mode or program.executable_lines < 15:
raise EvaluationError("incomplete executable program")
if set(program.tool_changes) != {1, 2, 3}:
raise EvaluationError("tool set must be exactly T1/T2/T3")
for tool, contract in TOOL_CONTRACT.items():
segs = cutting_segments(program, tool)
if not segs:
raise EvaluationError(f"T{tool} has no cutting motion")
valid = [
s for s in segs
if s.spindle_on
and s.spindle is not None and close(s.spindle, contract["spindle"], 1.0)
and s.feed is not None and close(s.feed, contract["feed"], 0.75)
and s.wcs is not None and s.length_comp and s.h_offset is not None and s.h_offset > 0
]
if not valid:
raise EvaluationError(f"T{tool} lacks cutting under required S/F/WCS/G43/H")
if any(s.tool not in TOOL_CONTRACT for s in program.segments if s.tool is not None):
raise EvaluationError("unexpected tool")
if not any(s.motion == 0 and max(s.start.z, s.end.z) >= 3.0 for s in program.segments):
raise EvaluationError("missing safe rapid clearance")
def points_for(segs: list[Segment], zmin: float, zmax: float) -> list[Point]:
return [p for s in segs for p in s.samples if zmin <= p.z <= zmax]
def grid_covered(points: list[Point], xs: list[float], ys: list[float], radius: float) -> bool:
return all(any(math.hypot(p.x - x, p.y - y) <= radius for p in points) for x in xs for y in ys)
def validate_face(program: Program) -> None:
pts = points_for(cutting_segments(program, 1), -2.0, 0.75)
if len(pts) < 100:
raise EvaluationError("insufficient face motion")
if not grid_covered(pts, [-52, -26, 0, 26, 52], [-32, -16, 0, 16, 32], 9.0):
raise EvaluationError("face does not cover the 120 x 80 top")
def validate_pocket(program: Program) -> None:
pts = [p for p in points_for(cutting_segments(program, 2), -11.25, -9.25) if abs(p.x) <= 28.5 and abs(p.y) <= 18.5]
if len(pts) < 50 or not grid_covered(pts, [-20, -10, 0, 10, 20], [-10, 0, 10], 4.8):
raise EvaluationError("48 x 28 pocket is not cleared to depth 10")
def validate_drill(program: Program) -> None:
vertical = []
for s in cutting_segments(program, 3):
if math.hypot(s.end.x - s.start.x, s.end.y - s.start.y) <= 0.25 and min(s.start.z, s.end.z) <= -18.0:
vertical.append((s.end.x, s.end.y))
for hx, hy in HOLES:
if not any(math.hypot(x - hx, y - hy) <= 0.75 for x, y in vertical):
raise EvaluationError("missing one or more through holes")
if any(min(math.hypot(x - hx, y - hy) for hx, hy in HOLES) > 0.75 for x, y in vertical):
raise EvaluationError("unexpected drilling location")
def signed_area(points: list[Point]) -> float:
return 0.5 * sum(a.x * b.y - b.x * a.y for a, b in zip(points, points[1:]))
def near_closed_subloops(points: list[Point]) -> list[list[Point]]:
loops: list[list[Point]] = []
if len(points) >= 50 and distance(points[0], points[-1]) <= 2.0:
loops.append(points)
for start in range(len(points) - 50):
for end in range(start + 50, len(points)):
if distance(points[start], points[end]) <= 2.0:
loops.append(points[start : end + 1])
return loops
def validate_profile(program: Program) -> None:
segs = cutting_segments(program, 2)
candidates: list[tuple[list[Point], list[Segment]]] = []
run: list[Point] = []
run_segments: list[Segment] = []
for s in segs:
horizontal = abs(s.start.z - s.end.z) <= 0.3 and min(s.start.z, s.end.z) <= -17.25
if horizontal:
if not run or distance(run[-1], s.start) <= 0.5:
if not run:
run.append(s.start)
run.extend(s.samples[1:])
run_segments.append(s)
else:
if run:
candidates.append((run, run_segments))
run = [s.start, *s.samples[1:]]
run_segments = [s]
elif run:
candidates.append((run, run_segments))
run = []
run_segments = []
if run:
candidates.append((run, run_segments))
for pts, loop_segments in candidates:
if len(pts) < 50:
continue
for loop in near_closed_subloops(pts):
xs, ys = [p.x for p in loop], [p.y for p in loop]
geometry_offset = close(min(xs), -64, 1.0) and close(max(xs), 64, 1.0) and close(min(ys), -44, 1.0) and close(max(ys), 44, 1.0)
nominal_points = [p for p in loop if abs(p.x) <= 60.75 and abs(p.y) <= 40.75]
nominal = (
nominal_points
and close(min(p.x for p in nominal_points), -60, 1.0)
and close(max(p.x for p in nominal_points), 60, 1.0)
and close(min(p.y for p in nominal_points), -40, 1.0)
and close(max(p.y for p in nominal_points), 40, 1.0)
and all(
any(abs(p.x - x) <= 0.75 and abs(p.y - y) <= 0.75 for p in nominal_points)
for x, y in ((-60, -40), (60, -40), (60, 40), (-60, 40))
)
)
comps = {s.comp for s in loop_segments}
if geometry_offset and all(max(abs(p.x) - 60, abs(p.y) - 40) >= 3.0 for p in loop):
return
if nominal:
area = signed_area(loop)
required = 42 if area > 0 else 41
if required in comps and any(s.d_offset is not None and s.d_offset > 0 for s in loop_segments):
return
raise EvaluationError("missing closed compensated outside profile at full depth")
def evaluate_text(src: str) -> bool:
try:
program = parse_program(src)
validate_common(program)
validate_face(program)
validate_pocket(program)
validate_drill(program)
validate_profile(program)
return True
except (EvaluationError, OverflowError, ValueError):
return False
def main() -> bool:
path = TARGET / NC_NAME
if not path.is_file() or path.stat().st_size == 0:
return False
return evaluate_text(path.read_text(encoding="utf-8", errors="strict"))
if __name__ == "__main__":
try:
result = main()
except Exception:
result = False
print("True" if result else "False")
raise SystemExit(0)
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