| import os |
| from pathlib import Path |
|
|
| import numpy as np |
| import trimesh |
|
|
| OUTPUT_ROOT = Path(os.environ.get("OUTPUT_ROOT", "/home/user/Desktop")) |
| TARGET = "out.stl" |
| BBOX_TOL = 1.0 |
| POINT_TOL = 1e-7 |
|
|
| SPEC = {'bbox': [100, 50, 70], 'solid': [(5, 25, 40), (60, 25, 62), (50, 25, 5)], 'empty': [(30, 25, 67), (10, 10, 5), (90, 40, 5)]} |
|
|
|
|
| def _load_mesh(): |
| path = OUTPUT_ROOT / TARGET |
| if not path.exists() or path.stat().st_size <= 0: |
| raise ValueError("missing STL output") |
| mesh = trimesh.load(str(path), force="mesh") |
| if getattr(mesh, "is_empty", True) or len(mesh.vertices) == 0 or len(mesh.faces) == 0: |
| raise ValueError("invalid STL output") |
| return mesh |
|
|
|
|
| def _close_list(actual, expected, tol=BBOX_TOL): |
| return all(abs(float(a) - float(b)) <= tol for a, b in zip(actual, expected)) |
|
|
|
|
| def _ray_intersections(point, triangles, direction): |
| origin = np.asarray(point, dtype=float) |
| direction = np.asarray(direction, dtype=float) |
| direction = direction / np.linalg.norm(direction) |
| hits = [] |
| for tri in triangles: |
| v0, v1, v2 = tri |
| edge1 = v1 - v0 |
| edge2 = v2 - v0 |
| h = np.cross(direction, edge2) |
| a = float(np.dot(edge1, h)) |
| if abs(a) < POINT_TOL: |
| continue |
| f = 1.0 / a |
| s = origin - v0 |
| u = f * float(np.dot(s, h)) |
| if u < -POINT_TOL or u > 1.0 + POINT_TOL: |
| continue |
| q = np.cross(s, edge1) |
| v = f * float(np.dot(direction, q)) |
| if v < -POINT_TOL or u + v > 1.0 + POINT_TOL: |
| continue |
| t = f * float(np.dot(edge2, q)) |
| if t > POINT_TOL: |
| hits.append(round(t, 6)) |
| |
| hits = sorted(set(hits)) |
| return len(hits) |
|
|
|
|
| def _inside(point, triangles): |
| dirs = [(1.0, 0.173, 0.097), (0.117, 1.0, 0.193), (0.071, 0.149, 1.0)] |
| votes = 0 |
| for direction in dirs: |
| if _ray_intersections(point, triangles, direction) % 2 == 1: |
| votes += 1 |
| return votes >= 2 |
|
|
|
|
| def evaluate(): |
| mesh = _load_mesh() |
| extents = [float(v) for v in mesh.extents] |
| if not _close_list(extents, SPEC["bbox"]): |
| return False |
| triangles = np.asarray(mesh.triangles, dtype=float) |
| for point in SPEC.get("solid", []): |
| if not _inside(point, triangles): |
| return False |
| for point in SPEC.get("empty", []): |
| if _inside(point, triangles): |
| return False |
| return True |
|
|
|
|
| if __name__ == "__main__": |
| try: |
| ok = evaluate() |
| except Exception: |
| ok = False |
| print("True" if ok else "False") |
|
|
