Revit 二次开发 几何计算练习

学习地址：https://www.bilibili.com/video/BV1mf4y1S72o?p=8

达到目标一

• 从一个元素中得到实体
• 从实体得到面，计算面积与体积
• Solid、Face、Mesh、Triangle之间的关系

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Autodesk.Revit.UI;
using Autodesk.Revit.DB;
using Autodesk.Revit.ApplicationServices;
using Autodesk.Revit.Attributes;
using System.Windows.Forms;
using Autodesk.Revit.UI.Selection;

namespace RevitDevTV
{
    /// <summary>
    /// 几何计算
    /// </summary>
    [TransactionAttribute(TransactionMode.Manual)]
    [RegenerationAttribute(RegenerationOption.Manual)]
    public class SolidPractise : IExternalCommand
    {
        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            //获取UIDocument
            UIDocument uiDoc = commandData.Application.ActiveUIDocument;
            Autodesk.Revit.DB.Document revitDoc = uiDoc.Document;
            //收集Document的id
            ICollection<ElementId> ids = uiDoc.Selection.GetElementIds(); //获取选择到的元素的ID
            Element selElem = uiDoc.Document.GetElement(ids.First()); //获取选择的第一个元素
            GeometryElement ge = selElem.get_Geometry(new Options());
            double area = 0; //面积
            double volume = 0; //体积
            int triangleCount = 0; //三角网格数
            foreach (GeometryObject gObj in ge)
            {
                if (gObj is Solid) //判断是否是实体
                {
                    Solid sd = gObj as Solid; //如果是实体，都是sd
                    foreach (Face face in sd.Faces) //获取所有面
                    {
                        area += face.Area*0.3048*0.3048;
                        Mesh mesh = face.Triangulate(0.5);
                        triangleCount += mesh.NumTriangles; //获取网格数量
                    }
                    volume += sd.Volume * 0.3048 * 0.3048 * 0.3048;
                }
            }
            TaskDialog.Show("计算", "面积总和为:"+area.ToString()+";平方米"+"
"+"体积为："+volume.ToString("0.000")+"立方米"+"
"+"三角网格数:"+triangleCount.ToString()+"个");
            return Result.Succeeded;
        }
    }
}

达到目标二

交点立柱

• 计算轴线间的交点
• 在交点处放置柱子

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Autodesk.Revit.UI;
using Autodesk.Revit.DB;
using Autodesk.Revit.ApplicationServices;
using Autodesk.Revit.Attributes;
using System.Windows.Forms;
using Autodesk.Revit.UI.Selection;

namespace RevitDevTV
{
    /// <summary>
    /// 交点立柱
    /// </summary>
    [TransactionAttribute(TransactionMode.Manual)]
    [RegenerationAttribute(RegenerationOption.Manual)]
    public class GridPractise : IExternalCommand
    {
        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            UIDocument uiDoc = commandData.Application.ActiveUIDocument;
            Document revitDoc = uiDoc.Document;
            //创建一个收集器，从uiDoc.Document中获取
            FilteredElementCollector coll = new FilteredElementCollector(revitDoc);
            //创建一个轴网过滤器，从grid（网格）中收集
            ElementClassFilter gridFilter = new ElementClassFilter(typeof(Grid));
            //将过滤的轴网，放入list
            List<Element> grid = coll.WherePasses(gridFilter).ToElements().ToList();
            //收集线
            List<Line> gridLines = new List<Line>();
            //创建交点
            List<XYZ> intPos = new List<XYZ>();
            //找到轴网的交点
            foreach (Grid gri in grid)
            {
                gridLines.Add(gri.Curve as Line);

            }
            foreach (Line ln1 in gridLines)
            {
                foreach (Line ln2 in gridLines)
                {
                    XYZ normal1 = ln1.Direction;
                    XYZ normal2 = ln2.Direction;
                    if (normal1.IsAlmostEqualTo(normal2)) continue;
                    IntersectionResultArray results;
                    SetComparisonResult intRst = ln1.Intersect(ln2, out results);
                    if (intRst==SetComparisonResult.Overlap && results.Size==1)
                    {
                        XYZ tp = results.get_Item(0).XYZPoint;
                        if (intPos.Where(m=>m.IsAlmostEqualTo(tp)).Count()==0)
                        {
                            intPos.Add(tp);
                        }
                    }
                }
            }
            Level level = revitDoc.GetElement(new ElementId(331)) as Level;
            FamilySymbol familysymb = revitDoc.GetElement(new ElementId(52557)) as FamilySymbol;
            //在交点处放置52557的柱子
            using (Transaction trans=new Transaction(revitDoc))
            {
                trans.Start("dfs");
                if (!familysymb.IsActive)
                {
                    familysymb.Activate();
                }
                foreach (XYZ p in intPos)
                {
                    //使用创建方法
                    FamilyInstance familyInstance = revitDoc.Create.NewFamilyInstance(p,familysymb,level,Autodesk.Revit.DB.Structure.StructuralType.NonStructural);
                }
                trans.Commit();
            }
                return Result.Succeeded;
        }
    }
}