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PMI 建模

PMI 用于在 3D 场景中显示尺寸、工艺信息和文字标注。通过 build_description.type = "Pmi" 创建 PMI 节点。

PMI 总体效果

点到点尺寸​

点到点 PMI

doc.addNode({ build_description: { type: "Pmi", payload: { type: "DistancePmi", data: {
  point0: [34.5, -45, -110.5], point1: [80, -45, -110.5], text: "3: 45.5",
  yDir: [0, 1, 0], appendUp: "+0.02", appendDown: "-0.02", extLength: 10, textWidth: 35,
} } } });

point0 和 point1 定义端点，text 是主文字，appendUp/appendDown 表示上下偏差，yDir 定义文字上方向。

单点和深度标注​

单点 PMI 深度 PMI

doc.addNode({ build_description: { type: "Pmi", payload: { type: "PointPmi", data: {
  point: [96.05, 35.17, 93.44], text: "R9", textWidth: 20,
  yDir: [0, 1, 0], xDir: [-1, 0, 0], extLength: 20,
} } } });

doc.addNode({ build_description: { type: "Pmi", payload: { type: "DistancePmi", data: {
  point0: [5, 27, 95], point1: [5, 27, 1], text: "深94.00",
  yDir: [-1, 0, 0], extLength: 30, textWidth: 45, depthMode: true,
} } } });

线段引出标注​

线段 PMI

doc.addNode({ build_description: { type: "Pmi", payload: { type: "LinePmi", data: {
  point: [-101, 151, 0.9], text: "101.00", appendUp: "+0.05", appendDown: "-0.05",
  yDir: [1, 0, 0], xDir: [0, 1, 0], textWidth: 35, extLength: 80,
  color: 0x00ff00, xFlip: false,
} } } });

xFlip: true 可将文字沿 xDir 反向显示；color 用于设置 PMI 颜色。PMI 参数应随业务数据保存，重新加载 Document 后再次构建。

PMI 颜色