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@tonicanada
Created August 16, 2022 03:36
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using System;
using System.Collections.Generic;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.EditorInput;
namespace ShortestPathMatrix
{
public class BlockNodeCreator
{
/// <summary>
/// Method that generates the entities to build a node block with the shape of a circle with a letter inside.
/// </summary>
/// <param name="db">AutoCAD database</param>
/// <param name="basePoint">Nodeblock basepoint</param>
/// <returns>Entities list to build the block</returns>
public static List<Entity> CircleBlockNodeEntities(Database db, Point3d basePoint)
{
List<Entity> result = new List<Entity>();
Circle circ = new Circle();
circ.Center = basePoint;
circ.Radius = 2.5;
AttributeDefinition attr = new AttributeDefinition();
attr.Tag = "Node name";
attr.Prompt = "Node name:";
//attr.TextString = "A";
attr.Verifiable = true;
attr.LockPositionInBlock = true;
attr.TextStyleId = db.Textstyle;
attr.Height = 1.75;
attr.Justify = AttachmentPoint.MiddleCenter;
result.Add(circ);
result.Add(attr);
return result;
}
/// <summary>
/// Method that generates the entities to build a node block with the shape of leader line with a label.
/// </summary>
/// <param name="db">AutoCAD database</param>
/// <param name="basePoint">Nodeblock basepoint</param>
/// <returns>Entities list to build the block</returns>
public static List<Entity> LeaderBlockNodeEntities(Database db, Point3d basePoint)
{
List<Entity> result = new List<Entity>();
Polyline pl = new Polyline();
pl.AddVertexAt(0, new Point2d(0, 0), 0, 0, 0);
pl.AddVertexAt(1, new Point2d(3, 3), 0, 0, 0);
pl.AddVertexAt(2, new Point2d(13, 3), 0, 0, 0);
Circle circ = new Circle();
circ.Center = basePoint;
circ.Radius = 0.5;
AttributeDefinition attr = new AttributeDefinition();
attr.Tag = "Station#";
attr.Prompt = "Station number:";
//attr.TextString = "Barcelona";
attr.Verifiable = true;
attr.LockPositionInBlock = true;
attr.TextStyleId = db.Textstyle;
attr.Height = 1.0;
attr.Position = new Point3d(6.0, 3.2, 0);
attr.AdjustAlignment(db);
result.Add(pl);
result.Add(circ);
result.Add(attr);
return result;
}
/// <summary>
/// Function that creates a block into the model's database, defined by list of entities.
/// </summary>
/// <param name="bt">AutoCAD BlockTable</param>
/// <param name="acDoc">AutoCAD Document</param>
/// <param name="db">AutoCAD Database</param>
/// <param name="blockName">Block's name</param>
/// <param name="blockEntities">List of entities to build the block</param>
public static void InsertBlockNodeToDb(BlockTable bt, Document acDoc, Database db, String blockName, List<Entity> blockEntities)
{
using (Transaction myT = db.TransactionManager.StartTransaction())
{
Editor ed = acDoc.Editor;
if (bt.Has(blockName))
{
ed.WriteMessage($"Block {blockName} already exists");
return;
}
BlockTableRecord btr = new BlockTableRecord();
bt.Add(btr);
btr.Name = blockName;
Point3d base_point = new Point3d(0, 0, 0);
btr.Origin = base_point;
btr.BlockScaling = BlockScaling.Uniform;
btr.Explodable = true;
foreach (Entity ent in blockEntities)
{
btr.AppendEntity(ent);
myT.AddNewlyCreatedDBObject(ent, true);
}
myT.AddNewlyCreatedDBObject(btr, true);
myT.Commit();
}
}
/// <summary>
/// Function that inserts a block into the model.
/// </summary>
/// <param name="bt">AutoCAD BlockTable</param>
/// <param name="btr">AutoCAD BlockTableRecord</param>
/// <param name="blockName">Node block's name</param>
/// <param name="nodeLabel">Node Label</param>
/// <param name="origin">Node Position</param>
public static void DrawBlockNodeToModel(BlockTable bt, BlockTableRecord btr, String blockName, String nodeLabel, Point3d origin)
{
BlockTableRecord btrNode = bt[blockName].GetObject(OpenMode.ForRead) as BlockTableRecord;
using (BlockReference blockRef = new BlockReference(origin, btrNode.ObjectId))
{
btr.AppendEntity(blockRef);
foreach (ObjectId id in btrNode)
//Iterate block definition to find all non-constant
// AttributeDefinitions
{
DBObject obj = id.GetObject(OpenMode.ForRead);
AttributeDefinition attDef = obj as AttributeDefinition;
if ((attDef != null) && (!attDef.Constant))
{
//This is a non-constant AttributeDefinition
//Create a new AttributeReference
using (AttributeReference attRef = new AttributeReference())
{
attRef.SetAttributeFromBlock(attDef, blockRef.BlockTransform);
attRef.TextString = nodeLabel;
//Add the AttributeReference to the BlockReference
blockRef.AttributeCollection.AppendAttribute(attRef);
}
}
}
}
}
}
}
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