光栅图像仅显示图像路径

Question

我正在尝试将图像添加到 CAD 绘图中，但只是得到一个显示路径的矩形，而没有显示图像。

我可以不将图像添加到图纸空间或仅将特定类型的图像添加到图纸空间（在我的情况下添加 .jpg 类型）。这是我的代码。

private void AddLogoImage(Transaction trans, BlockTableRecord titleRecord)
    { 
        // Define the name and image to use
        string imageName = "Comp Logo";
        string fileName = @"C:\Autodesk\Image\comp_logo.jpg";

        RasterImageDef imageDef;
        ObjectId imageDefId;

        // Get the image dictionary
        ObjectId imageDictId = RasterImageDef.GetImageDictionary(titleRecord.Database);

        // Check to see if the dictionary does not exist, it not then create it
        if (imageDictId.IsNull)
        {
            imageDictId = RasterImageDef.CreateImageDictionary(titleRecord.Database);
        }

        // Open the image dictionary
        DBDictionary imageDict = trans.GetObject(imageDictId, OpenMode.ForRead) as DBDictionary;

        // Check to see if the image definition already exists
        if (imageDict.Contains(imageName))
        {
            imageDefId = imageDict.GetAt(imageName);
            imageDef = trans.GetObject(imageDefId, OpenMode.ForWrite) as RasterImageDef;
        }
        else
        {
            // Create a raster image definition
            RasterImageDef newImageDef = new RasterImageDef();

            // Set the source for the image file
            newImageDef.SourceFileName = fileName;

            // Load the image into memory
            newImageDef.Load();

            // Add the image definition to the dictionary
            imageDict.UpgradeOpen();
            imageDefId = imageDict.SetAt(imageName, newImageDef);
            trans.AddNewlyCreatedDBObject(newImageDef, true);
            imageDef = newImageDef;
        }

        // Create the new image and assign it the image definition
        using (RasterImage acRaster = new RasterImage())
        {
            acRaster.ImageDefId = imageDefId;

            Vector3d width;
            Vector3d height;

            // Check to see if the measurement is set to English (Imperial) or Metric units
            if (titleRecord.Database.Measurement == MeasurementValue.English)
            {
                width = new Vector3d((imageDef.ResolutionMMPerPixel.X * acRaster.ImageWidth) / 25.4, 0, 0);
                height = new Vector3d(0, (imageDef.ResolutionMMPerPixel.Y * acRaster.ImageHeight) / 25.4, 0);
            }
            else
            {
                width = new Vector3d(imageDef.ResolutionMMPerPixel.X * acRaster.ImageWidth, 0, 0);
                height = new Vector3d(0, imageDef.ResolutionMMPerPixel.Y * acRaster.ImageHeight, 0);
            }

            // Define the position for the image 
            Point3d insPt = new Point3d(720, 129, 0.0);

            // Define and assign a coordinate system for the image's orientation
            CoordinateSystem3d coordinateSystem = new CoordinateSystem3d(insPt, width * 2, height * 2);
            acRaster.Orientation = coordinateSystem;

            // Set the rotation angle for the image
            acRaster.Rotation = 0;

            // Add the new object to the block table record and the transaction
            titleRecord.AppendEntity(acRaster);
            trans.AddNewlyCreatedDBObject(acRaster, true);

            // Connect the raster definition and image together so the definition
            // does not appear as "unreferenced" in the External References palette.
            RasterImage.EnableReactors(true);
            acRaster.AssociateRasterDef(imageDef);
            imageDef.Dispose();
        }
    }

我应该不使用 Rastor 图像吗？如果不是，是否有替代方法？

在来自 dwg 文件的 PDF 中正确显示，尽管更喜欢没有矩形边框。

Answer 1

要不显示边框，您可以将图像的颜色属性设置为 rgb(255,255,255)，假设您使用的是白色背景

Answer 2

免费的 TrueView 免费 DWG 查看器不显示图像。图像已成功创建并在 AutoDesk AutoCAD 完整版中可见