基于C#开发CATIA V5排样应用：排样迭代计算起点问询

由于CATIA V5没有排样功能，我想要基于C#开发一款排样应用。

已完成的开发步骤 #

1. 创建带材料尺寸限制的零件 #

通过以下代码设置零件的X和Y维度：

INFITF.Application catiaApp = (INFITF.Application)Marshal.GetActiveObject("CATIA.Application");

Documents catDocuments = catiaApp.Documents;
PartDocument partDoc = (PartDocument)catDocuments.Add("Part");
Part part = partDoc.Part;

Bodies bodies = part.Bodies;
MECMOD.Body body = bodies.Item("PartBody");
Sketches sketches = body.Sketches;

OriginElements originElements = part.OriginElements;
Reference planeXY = (Reference)originElements.PlaneXY;

Sketch sketch = sketches.Add(planeXY);

Factory2D factory2D = sketch.OpenEdition();

double xValue = Convert.ToDouble(xTextBox.Text);
double yValue = Convert.ToDouble(yTextBox.Text);

Point2D point1 = factory2D.CreatePoint(xValue, yValue);
Point2D point2 = factory2D.CreatePoint(0, yValue);
Point2D point3 = factory2D.CreatePoint(xValue, 0);
Point2D point4 = factory2D.CreatePoint(0, 0);

Line2D line1 = factory2D.CreateLine(0, yValue, xValue, yValue);
line1.StartPoint = point2;
line1.EndPoint = point1;

Line2D line2 = factory2D.CreateLine(xValue, yValue, xValue, 0);
line2.StartPoint = point1;
line2.EndPoint = point3;

Line2D line3 = factory2D.CreateLine(xValue, 0, 0, 0);
line3.StartPoint = point3;
line3.EndPoint = point4;

Line2D line4 = factory2D.CreateLine(0, 0, 0, yValue);
line4.StartPoint = point4;
line4.EndPoint = point2;

sketch.CloseEdition();
part.Update();

2. 创建待排样CATPart列表并选择排样区域面 #

代码如下：

OpenFileDialog dialog = new OpenFileDialog();
dialog.Filter = "CATIA Part Files (*.CATPart)|*.CATPart";
dialog.Multiselect = true; 
if (dialog.ShowDialog() == DialogResult.OK)
{
    foreach (string file in dialog.FileNames) // 选择的所有文件
    {
        string fileName = System.IO.Path.GetFileName(file); // 仅获取文件名
        dataGridView1.Rows.Add(fileName, 1); // 第二列自动填充"1"

        // 在CATIA中打开文件
        try
        {
            catiaApp.Documents.Open(file); // 在CATIA中打开每个文件
            PartDocument partDocument = (PartDocument)catiaApp.ActiveDocument;
            Part part = partDocument.Part;

            Selection selection = partDocument.Selection;
            object[] filter = { "Face" };
            string status = selection.SelectElement2(filter, "", false);

            if (status == "Normal")
            {
                Reference selectedFace = (Reference)selection.Item(1).Reference;

                HybridShapeFactory hybridShapeFactory = (HybridShapeFactory)part.HybridShapeFactory;

                HybridShapeInverse hybridShapeInverse = hybridShapeFactory.AddNewInverse(selectedFace, -1);

                HybridBodies hybridBodies = part.HybridBodies;
                HybridBody hybridBody = hybridBodies.Item("Geometrical Set.1");

                hybridBody.AppendHybridShape(hybridShapeInverse);
                part.InWorkObject = hybridShapeInverse;
                part.Update();

                Reference reference2 = part.CreateReferenceFromObject(hybridShapeInverse);
                HybridShapeBoundary hybridShapeBoundary = hybridShapeFactory.AddNewBoundaryOfSurface(reference2);

                hybridBody.AppendHybridShape(hybridShapeBoundary);
                part.InWorkObject = hybridShapeBoundary;
                part.Update();
            }
            else
            {
                MessageBox.Show("未选择面，操作已取消。");
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show($"无法打开文件: {fileName}\n错误: {ex.Message}");
        }
    }
}

当前问题与需求 #

接下来我计划打开Product文件，添加上述X/Y矩形边界零件，然后开始放置待排样零件，但遇到了问题：如何在CATIA中实现排样的迭代逻辑？

我已有通过平移、旋转放置零件，以及通过约束设置边界与零件间偏移量的思路，请问应从何处开始进行排样计算？

我的应用界面（原界面为英文，已完成中文翻译）：

内容的提问来源于stack exchange，提问作者Yunus Mert AŞKIN