427 lines
18 KiB
Python
427 lines
18 KiB
Python
"""
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SA2 Automated Vector Geometry Measurement & ISO 129-1 Technical Marking Engine.
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Detects circular bores (Ø), arc cutouts & fillets (R), bevels & chamfers (C), hole pitch, and step features per SlicingObject.
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"""
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import math
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from typing import Any, Callable
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import numpy as np
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from numpy.typing import NDArray
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from .geometry import (
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extract_lineart_edges,
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extract_unique_top_view_edges,
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deduplicate_2d_edges,
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extract_boundary_edges,
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extract_outer_contour_edges,
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extract_crease_edges,
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)
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from .sizing import SA2Sizing, compute_effective_stroke_and_font, MM_TO_PT
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def escape_pdf_text(text: str) -> str:
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# For PDF text strings, escape only the PDF special characters: \, (, )
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# Non-ASCII characters will be encoded as cp1252 bytes in the stream
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# which matches the WinAnsiEncoding of the font
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return text.replace("\\", "\\\\").replace("(", "\\(").replace(")", "\\)")
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def circumcircle_3pts(p1: NDArray, p2: NDArray, p3: NDArray) -> tuple[tuple[float, float] | None, float | None]:
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"""Calculate center and radius of circumcircle passing through 3 2D points."""
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ax, ay = float(p1[0]), float(p1[1])
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bx, by = float(p2[0]), float(p2[1])
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cx, cy = float(p3[0]), float(p3[1])
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d = 2.0 * (ax * (by - cy) + bx * (cy - ay) + cx * (ay - by))
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if abs(d) < 1e-8:
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return None, None
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ux = ((ax**2 + ay**2) * (by - cy) + (bx**2 + by**2) * (cy - ay) + (cx**2 + cy**2) * (ay - by)) / d
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uy = ((ax**2 + ay**2) * (cx - bx) + (bx**2 + by**2) * (ax - cx) + (cx**2 + cy**2) * (bx - ax)) / d
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r = float(np.sqrt((ax - ux)**2 + (ay - uy)**2))
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return (ux, uy), r
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def extract_slicing_objects_bounds(mesh_data: Any) -> list[tuple[Any, str, float, float, float, float]]:
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"""
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Extracts (slicing_object, object_name, min_x_mm, max_x_mm, min_y_mm, max_y_mm) for each SlicingObject in mesh_data.
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"""
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from ...infra.blender.blender_mesh_capture import SlicingGroup, SlicingCollection, SlicingObject
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results: list[tuple[Any, str, float, float, float, float]] = []
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def process_item(item: Any, fallback_name: str = ""):
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if item is None:
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return
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elif isinstance(item, (list, tuple)):
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for i, sub in enumerate(item):
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process_item(sub, f"{fallback_name}_{i}" if fallback_name else f"object_{i}")
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elif isinstance(item, SlicingGroup):
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for key, coll in item.collections.items():
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process_item(coll, key)
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elif isinstance(item, SlicingCollection):
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coll_name = item.name or fallback_name
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for i, so in enumerate(item.objects):
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process_item(so, so.name or f"{coll_name}_{i}")
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elif isinstance(item, SlicingObject):
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if item.mesh.size > 0:
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name = item.name or fallback_name or "object"
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verts_2d = item.mesh[:, :3, :2].reshape(-1, 2)
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if len(verts_2d) > 0:
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min_x = float(verts_2d[:, 0].min())
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max_x = float(verts_2d[:, 0].max())
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min_y = float(verts_2d[:, 1].min())
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max_y = float(verts_2d[:, 1].max())
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results.append((item, name, min_x, max_x, min_y, max_y))
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process_item(mesh_data)
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return results
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def extract_slicing_object_features(
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so_item: Any,
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draw_wireframe: bool = True,
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draw_boundary: bool = False,
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draw_contour: bool = False,
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draw_crease: bool = False,
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crease_angle: float = 30.0,
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bounds: tuple[float, float, float, float] | None = None,
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) -> list[tuple[float, float, float]]:
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"""
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Extracts circular bore / hole features (center_x, center_y, diameter_mm) from a SlicingObject
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per ISO 129-1 standards based on visible edge layers.
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"""
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edge_list: list[NDArray[np.float64]] = []
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if draw_wireframe:
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w_edges = extract_unique_top_view_edges(so_item)
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if len(w_edges) > 0:
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edge_list.append(w_edges)
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if draw_boundary and not draw_crease:
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b_edges_layer = extract_boundary_edges(so_item)
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if len(b_edges_layer) > 0:
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edge_list.append(b_edges_layer)
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if draw_contour:
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c_edges_layer = extract_outer_contour_edges(so_item)
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if len(c_edges_layer) > 0:
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edge_list.append(c_edges_layer)
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if draw_crease:
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cr_edges_layer = extract_crease_edges(so_item, max_angle_deg=crease_angle)
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if len(cr_edges_layer) > 0:
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edge_list.append(cr_edges_layer)
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if edge_list:
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combined = np.concatenate(edge_list, axis=0)
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b_edges = deduplicate_2d_edges(combined)
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else:
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b_edges = np.empty((0, 2, 2), dtype=np.float64)
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if len(b_edges) == 0:
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return []
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from shapely.geometry import LineString
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from shapely.ops import polygonize
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lines = [LineString([(float(p0[0]), float(p0[1])), (float(p1[0]), float(p1[1]))]) for p0, p1 in b_edges]
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polygons = list(polygonize(lines))
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loops: list[NDArray[np.float64]] = [np.array(poly.exterior.coords, dtype=np.float64) for poly in polygons]
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holes: list[tuple[float, float, float]] = []
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if bounds is not None:
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min_x, max_x, min_y, max_y = bounds
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elif hasattr(so_item, 'mesh') and so_item.mesh.size > 0:
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verts_2d = so_item.mesh[:, :3, :2].reshape(-1, 2)
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min_x, max_x = float(verts_2d[:, 0].min()), float(verts_2d[:, 0].max())
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min_y, max_y = float(verts_2d[:, 1].min()), float(verts_2d[:, 1].max())
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else:
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return holes
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overall_w = max_x - min_x
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overall_h = max_y - min_y
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for loop in loops:
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N = len(loop)
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if N < 3:
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continue
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cx_full = float(loop[:, 0].mean())
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cy_full = float(loop[:, 1].mean())
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dists_full = np.sqrt((loop[:, 0] - cx_full) ** 2 + (loop[:, 1] - cy_full) ** 2)
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r_mean_full = float(dists_full.mean())
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r_std_full = float(dists_full.std())
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# ISO Full Circular Bore (Ø) Detection
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if N >= 5 and r_mean_full > 0.5 and (r_std_full / r_mean_full) < 0.20:
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if r_mean_full < min(overall_w, overall_h) * 0.45:
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holes.append((cx_full, cy_full, r_mean_full * 2.0))
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return holes
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def render_sa2_measures_pdf(
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stream_cmds: list[str],
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raw_geometry: Any,
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draw_sa2_holes: bool = True,
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minor_step_mm: float = 1.0,
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main_step: float = 10.0,
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to_pdf_pt: Callable[[NDArray[np.float64]], NDArray[np.float64]] | None = None,
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font_size_pt: float | None = None,
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line_width_pt: float | None = None,
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draw_wireframe: bool = True,
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draw_boundary: bool = False,
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draw_contour: bool = False,
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draw_crease: bool = False,
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crease_angle: float = 30.0,
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) -> None:
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"""
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Renders ISO 129-1 compliant SA2 hole measurements (bores, concentric steps, Z-depth, pitch) on PDF stream.
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"""
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if raw_geometry is None or not draw_sa2_holes:
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return
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sa2_objects = extract_slicing_objects_bounds(raw_geometry)
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if not sa2_objects:
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return
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# Automatic sizing based on minor grid
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line_width_pt, font_size_pt = compute_effective_stroke_and_font(
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line_width_pt / MM_TO_PT if line_width_pt else 0.0,
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font_size_pt / MM_TO_PT if font_size_pt else 0.0,
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minor_step_mm
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)
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stream_cmds.append("/GS100 gs")
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sa2_lw_pt = line_width_pt * 0.8
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stream_cmds.append(f"{sa2_lw_pt:.2f} w")
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stream_cmds.append("1 j 1 J")
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# Vivid red / crimson color for main linear SA2 measures
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red_r, red_g, red_b = 0.85, 0.15, 0.15
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stream_cmds.append(f"{red_r:.3f} {red_g:.3f} {red_b:.3f} RG")
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for so_item, obj_name, min_x, max_x, min_y, max_y in sa2_objects:
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w_obj_mm = max_x - min_x
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h_obj_mm = max_y - min_y
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sizing = SA2Sizing(w_obj_mm, h_obj_mm, line_width_pt, font_size_pt)
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offset_mm = sizing.offset_mm
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ext_overhang_mm = sizing.ext_overhang_mm
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ext_gap_mm = sizing.ext_gap_mm
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arrow_len_pt = sizing.arrow_len_pt
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arrow_half_w_pt = sizing.arrow_half_w_pt
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mesh_verts_3d = None
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total_z_span = 0.0
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if hasattr(so_item, 'mesh') and so_item.mesh.size > 0:
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mesh_verts_3d = so_item.mesh[:, :3, :3].reshape(-1, 3)
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total_z_span = float(mesh_verts_3d[:, 2].max() - mesh_verts_3d[:, 2].min())
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# --- Width Dimension (Horizontal below SlicingObject) ---
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y_dim_mm = min_y - offset_mm
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p_ext_l1 = to_pdf_pt(np.array([[min_x, min_y - ext_gap_mm]]))
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p_ext_l2 = to_pdf_pt(np.array([[min_x, y_dim_mm - ext_overhang_mm]]))
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p_ext_r1 = to_pdf_pt(np.array([[max_x, min_y - ext_gap_mm]]))
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p_ext_r2 = to_pdf_pt(np.array([[max_x, y_dim_mm - ext_overhang_mm]]))
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stream_cmds.append(f"{p_ext_l1[0,0]:.2f} {p_ext_l1[0,1]:.2f} m {p_ext_l2[0,0]:.2f} {p_ext_l2[0,1]:.2f} l S")
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stream_cmds.append(f"{p_ext_r1[0,0]:.2f} {p_ext_r1[0,1]:.2f} m {p_ext_r2[0,0]:.2f} {p_ext_r2[0,1]:.2f} l S")
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p_dim_w1 = to_pdf_pt(np.array([[min_x, y_dim_mm]]))
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p_dim_w2 = to_pdf_pt(np.array([[max_x, y_dim_mm]]))
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x_w1, y_w = p_dim_w1[0, 0], p_dim_w1[0, 1]
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x_w2 = p_dim_w2[0, 0]
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stream_cmds.append(f"{x_w1:.2f} {y_w:.2f} m {x_w2:.2f} {y_w:.2f} l S")
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stream_cmds.append(
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f"{x_w1 + arrow_len_pt:.2f} {y_w + arrow_half_w_pt:.2f} m "
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f"{x_w1:.2f} {y_w:.2f} l "
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f"{x_w1 + arrow_len_pt:.2f} {y_w - arrow_half_w_pt:.2f} l S"
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)
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stream_cmds.append(
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f"{x_w2 - arrow_len_pt:.2f} {y_w + arrow_half_w_pt:.2f} m "
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f"{x_w2:.2f} {y_w:.2f} l "
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f"{x_w2 - arrow_len_pt:.2f} {y_w - arrow_half_w_pt:.2f} l S"
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)
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# --- Height Dimension (Vertical to the left of SlicingObject) ---
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x_dim_mm = min_x - offset_mm
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p_ext_b1 = to_pdf_pt(np.array([[min_x - ext_gap_mm, min_y]]))
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p_ext_b2 = to_pdf_pt(np.array([[x_dim_mm - ext_overhang_mm, min_y]]))
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p_ext_t1 = to_pdf_pt(np.array([[min_x - ext_gap_mm, max_y]]))
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p_ext_t2 = to_pdf_pt(np.array([[x_dim_mm - ext_overhang_mm, max_y]]))
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stream_cmds.append(f"{p_ext_b1[0,0]:.2f} {p_ext_b1[0,1]:.2f} m {p_ext_b2[0,0]:.2f} {p_ext_b2[0,1]:.2f} l S")
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stream_cmds.append(f"{p_ext_t1[0,0]:.2f} {p_ext_t1[0,1]:.2f} m {p_ext_t2[0,0]:.2f} {p_ext_t2[0,1]:.2f} l S")
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p_dim_h1 = to_pdf_pt(np.array([[x_dim_mm, min_y]]))
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p_dim_h2 = to_pdf_pt(np.array([[x_dim_mm, max_y]]))
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x_h, y_h1 = p_dim_h1[0, 0], p_dim_h1[0, 1]
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y_h2 = p_dim_h2[0, 1]
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stream_cmds.append(f"{x_h:.2f} {y_h1:.2f} m {x_h:.2f} {y_h2:.2f} l S")
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stream_cmds.append(
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f"{x_h - arrow_half_w_pt:.2f} {y_h1 + arrow_len_pt:.2f} m "
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f"{x_h:.2f} {y_h1:.2f} l "
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f"{x_h + arrow_half_w_pt:.2f} {y_h1 + arrow_len_pt:.2f} l S"
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)
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stream_cmds.append(
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f"{x_h - arrow_half_w_pt:.2f} {y_h2 - arrow_len_pt:.2f} m "
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f"{x_h:.2f} {y_h2:.2f} l "
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f"{x_h + arrow_half_w_pt:.2f} {y_h2 - arrow_len_pt:.2f} l S"
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)
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# --- Text Labels for Width and Height ---
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stream_cmds.append(f"{red_r:.3f} {red_g:.3f} {red_b:.3f} rg")
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stream_cmds.append("BT")
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stream_cmds.append(f"/F1 {font_size_pt:.1f} Tf")
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w_str = f"{w_obj_mm/1000:g}m" if main_step >= 1000.0 else f"{w_obj_mm:g}mm"
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x_w_text = (x_w1 + x_w2) / 2.0 - (len(w_str) * font_size_pt * 0.28)
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y_w_text = y_w - font_size_pt * 1.1
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stream_cmds.append(f"1 0 0 1 {x_w_text:.2f} {y_w_text:.2f} Tm")
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stream_cmds.append(f"({escape_pdf_text(w_str)}) Tj")
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h_str = f"{h_obj_mm/1000:g}m" if main_step >= 1000.0 else f"{h_obj_mm:g}mm"
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x_h_text = x_h - (len(h_str) * font_size_pt * 0.55) - (2.0 * MM_TO_PT)
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y_h_text = (y_h1 + y_h2) / 2.0 - (font_size_pt * 0.35)
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stream_cmds.append(f"1 0 0 1 {x_h_text:.2f} {y_h_text:.2f} Tm")
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stream_cmds.append(f"({escape_pdf_text(h_str)}) Tj")
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stream_cmds.append("ET")
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# --- SA2 Hole Features Extraction (Ø) ---
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holes = extract_slicing_object_features(
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so_item,
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draw_wireframe=draw_wireframe,
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draw_boundary=draw_boundary,
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draw_contour=draw_contour,
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draw_crease=draw_crease,
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crease_angle=crease_angle,
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bounds=(min_x, max_x, min_y, max_y),
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)
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# Concentric Bores Grouping & ISO 129-1 Callouts with Z-depth Specs (Electric Blue)
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if draw_sa2_holes and holes:
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blue_r, blue_g, blue_b = 0.10, 0.45, 0.90
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stream_cmds.append(f"{blue_r:.3f} {blue_g:.3f} {blue_b:.3f} RG")
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stream_cmds.append(f"{blue_r:.3f} {blue_g:.3f} {blue_b:.3f} rg")
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# Group holes by center location (tolerance = 0.5mm)
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concentric_groups: list[list[tuple[float, float, float]]] = []
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for cx, cy, dia in holes:
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added = False
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for grp in concentric_groups:
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gcx, gcy, _ = grp[0]
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if math.hypot(cx - gcx, cy - gcy) < 0.5:
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grp.append((cx, cy, dia))
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added = True
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break
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if not added:
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concentric_groups.append([(cx, cy, dia)])
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for grp in concentric_groups:
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grp.sort(key=lambda h: h[2], reverse=True)
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gcx, gcy, max_dia = grp[0]
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slant_mm, leader_mm = sizing.get_hole_callout_lengths(max_dia)
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px_edge = gcx + (max_dia / 2.0) * 0.7071
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py_edge = gcy + (max_dia / 2.0) * 0.7071
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px_sh1 = px_edge + slant_mm
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py_sh1 = py_edge + slant_mm
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p_edge = to_pdf_pt(np.array([[px_edge, py_edge]]))
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p_sh1 = to_pdf_pt(np.array([[px_sh1, py_sh1]]))
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p_sh2 = to_pdf_pt(np.array([[px_sh1 + leader_mm, py_sh1]]))
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xe, ye = p_edge[0, 0], p_edge[0, 1]
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xs1, ys1 = p_sh1[0, 0], p_sh1[0, 1]
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stream_cmds.append(f"{xe:.2f} {ye:.2f} m {xs1:.2f} {ys1:.2f} l {p_sh2[0, 0]:.2f} {ys1:.2f} l S")
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stream_cmds.append(
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f"{xe + arrow_len_pt * 0.7071:.2f} {ye + arrow_len_pt * 0.7071:.2f} m "
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f"{xe:.2f} {ye:.2f} l "
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f"{xe + arrow_len_pt * 0.3535:.2f} {ye + arrow_len_pt * 0.95:.2f} l S"
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)
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for line_idx, (hcx, hcy, hdia) in enumerate(grp):
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depth_str = ""
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if mesh_verts_3d is not None and total_z_span > 0:
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r_h = hdia / 2.0
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d_mask = np.hypot(mesh_verts_3d[:, 0] - hcx, mesh_verts_3d[:, 1] - hcy) <= (r_h + 0.3)
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if np.any(d_mask):
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z_sub = mesh_verts_3d[d_mask, 2]
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h_z_depth = float(z_sub.max() - z_sub.min())
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if abs(h_z_depth - total_z_span) < 0.2:
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depth_str = " THRU"
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elif h_z_depth > 0.1:
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depth_str = f" x {h_z_depth:.1f} DP"
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dia_val = round(hdia, 1)
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dia_str = f"Ø {dia_val:g}{depth_str}"
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y_text_offset = ys1 + 2.0 - (line_idx * font_size_pt * 1.1)
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|
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stream_cmds.append("BT")
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stream_cmds.append(f"/F1 {font_size_pt * 0.85:.1f} Tf")
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stream_cmds.append(f"1 0 0 1 {xs1 + 2.0:.2f} {y_text_offset:.2f} Tm")
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stream_cmds.append(f"({escape_pdf_text(dia_str)}) Tj")
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stream_cmds.append("ET")
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|
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|
# Orthogonal Hole Center Pitch & Datum Offset Baselines (Teal Green)
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if draw_sa2_holes and 'concentric_groups' in locals() and len(concentric_groups) >= 2:
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teal_r, teal_g, teal_b = 0.05, 0.58, 0.53
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stream_cmds.append(f"{teal_r:.3f} {teal_g:.3f} {teal_b:.3f} RG")
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|
stream_cmds.append(f"{teal_r:.3f} {teal_g:.3f} {teal_b:.3f} rg")
|
|
|
|
distinct_centers = [grp[0][:2] for grp in concentric_groups]
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|
distinct_centers.sort(key=lambda c: (c[0], c[1]))
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|
|
|
for i in range(len(distinct_centers) - 1):
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|
(cx1, cy1), (cx2, cy2) = distinct_centers[i], distinct_centers[i + 1]
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|
dx_mm = abs(cx2 - cx1)
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|
dy_mm = abs(cy2 - cy1)
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|
|
|
# Horizontal Pitch Axis (if dx_mm > 0.5)
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|
if dx_mm > 0.5:
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|
y_pitch_mm = min(cy1, cy2) - sizing.offset_mm * 0.5
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|
p_h1 = to_pdf_pt(np.array([[cx1, y_pitch_mm]]))
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|
p_h2 = to_pdf_pt(np.array([[cx2, y_pitch_mm]]))
|
|
p_e1 = to_pdf_pt(np.array([[cx1, cy1]]))
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|
p_e2 = to_pdf_pt(np.array([[cx2, cy2]]))
|
|
|
|
stream_cmds.append(f"{p_e1[0,0]:.2f} {p_e1[0,1]:.2f} m {p_h1[0,0]:.2f} {p_h1[0,1]:.2f} l S")
|
|
stream_cmds.append(f"{p_e2[0,0]:.2f} {p_e2[0,1]:.2f} m {p_h2[0,0]:.2f} {p_h2[0,1]:.2f} l S")
|
|
stream_cmds.append(f"{p_h1[0,0]:.2f} {p_h1[0,1]:.2f} m {p_h2[0,0]:.2f} {p_h2[0,1]:.2f} l S")
|
|
|
|
pitch_str = f"{dx_mm:.1f} C-C"
|
|
stream_cmds.append("BT")
|
|
stream_cmds.append(f"/F1 {font_size_pt * 0.8:.1f} Tf")
|
|
stream_cmds.append(f"1 0 0 1 {(p_h1[0,0]+p_h2[0,0])/2.0:.2f} {p_h1[0,1] - font_size_pt * 0.9:.2f} Tm")
|
|
stream_cmds.append(f"({escape_pdf_text(pitch_str)}) Tj")
|
|
stream_cmds.append("ET")
|
|
|
|
# Vertical Pitch Axis (if dy_mm > 0.5)
|
|
if dy_mm > 0.5:
|
|
x_pitch_mm = max(cx1, cx2) + sizing.offset_mm * 0.5
|
|
p_v1 = to_pdf_pt(np.array([[x_pitch_mm, cy1]]))
|
|
p_v2 = to_pdf_pt(np.array([[x_pitch_mm, cy2]]))
|
|
p_e1 = to_pdf_pt(np.array([[cx1, cy1]]))
|
|
p_e2 = to_pdf_pt(np.array([[cx2, cy2]]))
|
|
|
|
stream_cmds.append(f"{p_e1[0,0]:.2f} {p_e1[0,1]:.2f} m {p_v1[0,0]:.2f} {p_v1[0,1]:.2f} l S")
|
|
stream_cmds.append(f"{p_e2[0,0]:.2f} {p_e2[0,1]:.2f} m {p_v2[0,0]:.2f} {p_v2[0,1]:.2f} l S")
|
|
stream_cmds.append(f"{p_v1[0,0]:.2f} {p_v1[0,1]:.2f} m {p_v2[0,0]:.2f} {p_v2[0,1]:.2f} l S")
|
|
|
|
pitch_str = f"{dy_mm:.1f} C-C"
|
|
stream_cmds.append("BT")
|
|
stream_cmds.append(f"/F1 {font_size_pt * 0.8:.1f} Tf")
|
|
stream_cmds.append(f"1 0 0 1 {p_v1[0,0] + 2.0:.2f} {(p_v1[0,1]+p_v2[0,1])/2.0:.2f} Tm")
|
|
stream_cmds.append(f"({escape_pdf_text(pitch_str)}) Tj")
|
|
stream_cmds.append("ET")
|
|
|