From fd1f43f2789c8d13f9faed75eabf723f3fa464a8 Mon Sep 17 00:00:00 2001 From: chenjw28 <792430652@qq.com> Date: Tue, 12 May 2026 10:23:58 +0800 Subject: [PATCH] x --- src/core/base_mold_generator.py | 61 +++++++++++++++++++-------------- 1 file changed, 36 insertions(+), 25 deletions(-) diff --git a/src/core/base_mold_generator.py b/src/core/base_mold_generator.py index 4b41449..42a2ac1 100644 --- a/src/core/base_mold_generator.py +++ b/src/core/base_mold_generator.py @@ -6,8 +6,8 @@ from OCC.Core.BRepAlgoAPI import BRepAlgoAPI_Cut, BRepAlgoAPI_Section, BRepAlgoA from OCC.Core.BRepBuilderAPI import BRepBuilderAPI_MakeFace, BRepBuilderAPI_Transform from OCC.Core.BRepPrimAPI import BRepPrimAPI_MakeBox, BRepPrimAPI_MakeHalfSpace from OCC.Core.gp import gp_Pln, gp_Dir, gp_Pnt, gp_Trsf, gp_Ax2 -from OCC.Core.TopoDS import TopoDS_Face, topods -from OCC.Core.BRep import BRep_Tool +from OCC.Core.TopoDS import TopoDS_Face, TopoDS_Compound, topods +from OCC.Core.BRep import BRep_Tool, BRep_Builder from OCC.Core.BRepMesh import BRepMesh_IncrementalMesh from OCC.Core.GProp import GProp_GProps from OCC.Core.BRepGProp import brepgprop @@ -297,27 +297,25 @@ class BaseMoldGenerator: xmax: float, ymax: float, zmax: float, ) -> Any: """ - 构建带底座的型芯：底座平板 + 产品突出体融合。 + 构建带底座的型芯。 - 底座从模具边界延伸到分型面（沿分型方向）， - 并略微伸入产品体积以确保布尔融合成功。 + 核心逻辑：底座平板沿分型方向覆盖模具半空间， + 与产品形状做布尔融合，形成"底座+产品突出体"。 + 融合失败时用 TopoDS_Compound 兜底，确保底座永不会丢失。 """ normal = parting_plane.Axis().Direction() origin = parting_plane.Location() nx, ny, nz = float(normal.X()), float(normal.Y()), float(normal.Z()) - prod_extent = (xmax - xmin) + (ymax - ymin) + (zmax - zmin) - overlap = max(prod_extent * 0.01, 0.5) + prod_span = max((xmax - xmin), (ymax - ymin), (zmax - zmin)) + overlap = max(prod_span * 0.15, 8.0) base_p1 = [mold_xmin, mold_ymin, mold_zmin] base_p2 = [mold_xmax, mold_ymax, mold_zmax] - for i, (n, o, lo, hi) in enumerate(zip( - [nx, ny, nz], - [float(origin.X()), float(origin.Y()), float(origin.Z())], - [mold_xmin, mold_ymin, mold_zmin], - [mold_xmax, mold_ymax, mold_zmax], - )): + for i in range(3): + n = [nx, ny, nz][i] + o = [float(origin.X()), float(origin.Y()), float(origin.Z())][i] if abs(n) < 0.001: continue if n > 0: @@ -325,12 +323,13 @@ class BaseMoldGenerator: else: base_p1[i] = o - overlap + base_plate = None try: base_plate = BRepPrimAPI_MakeBox( gp_Pnt(base_p1[0], base_p1[1], base_p1[2]), gp_Pnt(base_p2[0], base_p2[1], base_p2[2]) ).Shape() - logger.info("型芯底座平板构建完成") + logger.info(f"型芯底座构建: 重叠量={overlap:.1f}mm") except Exception as e: logger.warning(f"底座构建失败: {e}") return shape @@ -339,21 +338,33 @@ class BaseMoldGenerator: fuse_op = BRepAlgoAPI_Fuse(base_plate, shape) if fuse_op.IsDone(): core = fuse_op.Shape() - logger.info("型芯（底座+产品突出体）融合成功") - return core + explorer = TopExp_Explorer(core, TopAbs_FACE) + face_count = 0 + while explorer.More(): + face_count += 1 + explorer.Next() + if face_count > 0: + logger.info(f"型芯融合成功 (面数={face_count})") + return core + logger.warning("Fuse 结果无几何，尝试备用方案") except Exception as e: logger.warning(f"底座融合失败: {e}") - try: - cut_op = BRepAlgoAPI_Cut(mold_block, shape) - if cut_op.IsDone(): - logger.info("型芯通过布尔减回退构建") - return cut_op.Shape() - except Exception: - pass + return self._build_core_compound(base_plate, shape) - logger.info("型芯回退为产品形状") - return shape + @staticmethod + def _build_core_compound(base_plate: Any, shape: Any) -> Any: + """ + 兜底方案：构建 TopoDS_Compound 包含底座平板 + 产品。 + 即使布尔融合失败，底座也绝不会丢失。 + """ + compound = TopoDS_Compound() + builder = BRep_Builder() + builder.MakeCompound(compound) + builder.Add(compound, base_plate) + builder.Add(compound, shape) + logger.info("型芯 Compound 兜底构建 (底座+产品)") + return compound def _get_parting_plane(self, parting_surface: Any, shape: Any) -> Optional[gp_Pln]: """从分型面提取平面方程"""