/// <summary>
/// 自定义方法，用递归找到包含贴图信息：Asset包含的AssetProperty有多种类型，其中Asset、Properties
/// 和Reference这三种必须递归处理。贴图信息的AssetProperty名字是unifiedbitmap_Bitmap，类型是String。
/// </summary>
/// <param name="ap"></param>
/// <returns></returns>
private Autodesk.Revit.DB.Visual.Asset FindTextureAsset(AssetProperty ap)
{
Autodesk.Revit.DB.Visual.Asset result = null;
if (ap.Type == AssetPropertyType.Asset)
{
if (!IsTextureAsset(ap as Autodesk.Revit.DB.Visual.Asset))
{
for (int i = 0; i < (ap as Autodesk.Revit.DB.Visual.Asset).Size; i++)
{
if (null != FindTextureAsset((ap as Autodesk.Revit.DB.Visual.Asset)[i]))
{
result = FindTextureAsset((ap as Autodesk.Revit.DB.Visual.Asset)[i]);
break;
}
}
}
else
{
result = ap as Autodesk.Revit.DB.Visual.Asset;
}
return(result);
}
else
{
for (int j = 0; j < ap.NumberOfConnectedProperties; j++)
{
if (null != FindTextureAsset(ap.GetConnectedProperty(j)))
{
result = FindTextureAsset(ap.GetConnectedProperty(j));
}
}
return(result);
}
}
/// <summary>
/// 自定义方法，判断Asset是否包含贴图信息
/// </summary>
/// <param name="asset"></param>
/// <returns></returns>
private bool IsTextureAsset(Autodesk.Revit.DB.Visual.Asset asset)
{
AssetProperty assetProprty = GetAssetProprty(asset, "assettype");
if (assetProprty != null && (assetProprty as AssetPropertyString).Value == "texture")
{
return(true);
}
return(GetAssetProprty(asset, "unifiedbitmap_Bitmap") != null);
}
/// <summary>
/// 自定义方法，根据名字获取对应的AssetProprty
/// </summary>
/// <param name="asset"></param>
/// <param name="propertyName"></param>
/// <returns></returns>
private AssetProperty GetAssetProprty(Autodesk.Revit.DB.Visual.Asset asset, string propertyName)
{
for (int i = 0; i < asset.Size; i++)
{
if (asset[i].Name == propertyName)
{
return(asset[i]);
}
}
return(null);
}
/// <summary>
/// 设置材质
/// </summary>
/// <remarks>
//可以为每个单独的输出网格调用OnMaterial方法
///即使材质尚未实际更改。 因此通常
///有利于存储当前材料并仅获取其属性
///当材质实际更改时。
/// </remarks>
public void OnMaterial(MaterialNode node)
{
if (currentMaterialId != node.MaterialId)
{
currentMaterialId = node.MaterialId;
currentColor = node.Color;
currentTransparency = node.Transparency;
swMtl.Write(strNewmtl, currentMaterialId.IntegerValue.ToString(),
(currentColor.Red / 256.0).ToString(), (currentColor.Green / 256.0).ToString(), (currentColor.Blue / 256.0).ToString(),
currentTransparency);
if (node.HasOverriddenAppearance)
{
currentAsset = node.GetAppearanceOverride();
}
else
{
currentAsset = node.GetAppearance();
}
try
{
//取得Asset中贴图信息
string textureFile = (FindTextureAsset(currentAsset as AssetProperty)["unifiedbitmap_Bitmap"] as AssetPropertyString).Value.Split('|')[0];
//用Asset中贴图信息和注册表里的材质库地址得到贴图文件所在位置
string texturePath = Path.Combine(textureFolder, textureFile.Replace("/", "\\"));
//写入贴图名称
swMtl.Write("map_Kd " + Path.GetFileName(texturePath) + "\n");
//如果贴图文件真实存在，就复制到相应位置
if (File.Exists(texturePath))
{
File.Copy(texturePath, Path.Combine(Path.GetDirectoryName(filePath), textureName), true);
}
}
catch (Exception e)
{
Debug.Print("{0} Second exception.", e.Message);
}
}
Debug.Print($"Material {node.NodeName}");
}
/// <summary>
/// 设置当前材质
/// </summary>
/// <param name="uidMaterial"></param>
void SetCurrentMaterial(string uidMaterial, MaterialNode node)
{
if (!_materials.ContainsKey(uidMaterial))
{
RMaterial material = CurrentDocument.GetElement(uidMaterial) as RMaterial;
Color c = material.Color;
MaterialBuilder m = null;
try
{
if (material.Transparency != 0)
{
m = new MaterialBuilder()
.WithAlpha(SharpGLTF.Materials.AlphaMode.BLEND)
.WithDoubleSide(true)
.WithMetallicRoughnessShader()
.WithChannelParam(KnownChannel.BaseColor, new Vector4(c.Red / 256f, c.Green / 256f, c.Blue / 256f, 1 - (material.Transparency / 128f)));
}
else
{
m = new MaterialBuilder()
.WithDoubleSide(true)
.WithMetallicRoughnessShader()
.WithChannelParam(KnownChannel.BaseColor, new Vector4(c.Red / 256f, c.Green / 256f, c.Blue / 256f, 1));
}
Autodesk.Revit.DB.Visual.Asset currentAsset;
if (node.HasOverriddenAppearance)
{
currentAsset = node.GetAppearanceOverride();
}
else
{
currentAsset = node.GetAppearance();
}
try
{
//取得Asset中贴图信息
Autodesk.Revit.DB.Visual.Asset findAssert = FindTextureAsset(currentAsset as AssetProperty);
if (findAssert != null)
{
string textureFile = (findAssert["unifiedbitmap_Bitmap"] as AssetPropertyString).Value.Split('|')[0];
//用Asset中贴图信息和注册表里的材质库地址得到贴图文件所在位置
string textureName = textureFile.Replace("/", "\\");
string texturePath = Path.Combine(_textureFolder, textureName);
m.WithChannelImage(KnownChannel.BaseColor, texturePath);
}
}
catch (Exception e)
{
}
}
catch (Exception e)
{
}
_materials.Add(uidMaterial, m);
}
_currentMaterial = _materials[uidMaterial];
}