【Xbim+C#】创建拉伸的墙

基础

基础回顾

效果图

简单的工具类

using System.Collections.Generic;
using System.Linq;
using Xbim.Common.Step21;
using Xbim.Ifc;
using Xbim.Ifc4.GeometricConstraintResource;
using Xbim.Ifc4.GeometricModelResource;
using Xbim.Ifc4.GeometryResource;
using Xbim.Ifc4.Interfaces;
using Xbim.Ifc4.Kernel;
using Xbim.Ifc4.MeasureResource;
using Xbim.Ifc4.PresentationAppearanceResource;
using Xbim.Ifc4.ProductExtension;
using Xbim.Ifc4.ProfileResource;
using Xbim.Ifc4.RepresentationResource;
using Xbim.Ifc4.SharedBldgElements;

namespace TestXbim
{
    public class IfcUtil
    {
        public static IfcStore MakeIfcStore()
        {
            return IfcStore.Create(IfcSchemaVersion.Ifc4, XbimStoreType.InMemoryModel);
        }

        public static IfcProject CreateProject(IfcStore model)
        {
            return model.Instances.New<IfcProject>(p =>
            {
                p.UnitsInContext = model.Instances.New<IfcUnitAssignment>(a =>
                    a.SetOrChangeSiUnit(IfcUnitEnum.LENGTHUNIT, IfcSIUnitName.METRE, IfcSIPrefix.MILLI));
            });
        }
        public static IfcSite CreateSite(IfcStore model)
        {
            return model.Instances.New<IfcSite>();
        }
        public static IfcBuilding CreateBuilding(IfcStore model)
        {
            return  model.Instances.New<IfcBuilding>();  
        }
     
        public static IfcWall CreateWall(IfcStore model)
        {
            return model.Instances.New<IfcWall>();  
        }       

        public static IfcProductDefinitionShape CreateExtrudedShape(IfcStore model, List<double[]> points, double depth, double elevation)
        {
            //基于点坐标序列，创建折线
            IfcPolyline polyline = model.Instances.New<IfcPolyline>(L =>
            {
                foreach (var point in points)
                {
                    IfcCartesianPoint p = model.Instances.New<IfcCartesianPoint>(cp => cp.SetXY(point[0], point[1]));
                    L.Points.Add(p);
                }
            });

            //基于折线创建切面
            var profileDef = model.Instances.New<IfcArbitraryClosedProfileDef>(p =>
            {
                p.ProfileType = IfcProfileTypeEnum.AREA;
                p.OuterCurve = polyline;
            });

            //基于切面创建拉伸体
            var solid = model.Instances.New<IfcExtrudedAreaSolid>(s =>
            {
                s.Position = model.Instances.New<IfcAxis2Placement3D>(p =>
                    p.Location = model.Instances.New<IfcCartesianPoint>(c => c.SetXYZ(0, 0, elevation)));
                s.Depth = depth;
                s.ExtrudedDirection = model.Instances.New<IfcDirection>(d => d.SetXYZ(0, 0, 1));
                s.SweptArea = profileDef;
            });

            //基于拉伸体，创建形状
            var rep = model.Instances.New<IfcShapeRepresentation>(r =>
            {
                r.Items.Add(solid);
            });

            //基于形状，创建产品形状
            var shape = model.Instances.New<IfcProductDefinitionShape>(s => s.Representations.Add(rep));

            return shape;
        }        
    }
}

示例代码

public void TestMethod1()
{
    var pts = new List<double[]>()
    {
        new double[]{0,0},
        new double[]{0,1000},
        new double[]{2000,1000},
        new double[]{2000,0},
    };
    var pts2 = new List<double[]>()
    {
        new double[]{0,1500},
        new double[]{0,2500},
        new double[]{1000,2500},
        new double[]{1000,1500},
    };
    var model = IfcUtil.MakeIfcStore();
    using (var tran = model.BeginTransaction())
    {
        var color = new double[] { 0.5, 0, 0, 2 };
        var wallShape = IfcUtil.CreateExtrudedShape(model, pts, 500, 0);
        var wall = IfcUtil.CreateWall(model);
        wall.Representation = wallShape;

        var wallShape2 = IfcUtil.CreateExtrudedShape(model, pts2, 500, 0);
        var wall2 = IfcUtil.CreateWall(model);
        wall2.Representation = wallShape2;

        var building = IfcUtil.CreateBuilding(model);
        building.AddElement(wall);
        building.AddElement(wall2);

        var site = IfcUtil.CreateSite(model);
        site.AddBuilding(building);

        var project = IfcUtil.CreateProject(model);
        project.AddSite(site);

        tran.Commit();
    }

    model.SaveAs("./wall.ifc");
}

原文地址：https://blog.csdn.net/liqian_ken/article/details/143867404

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