public static List <TextureBundle> GetTextureBundles(Document doc, out List <string> paths)
{
if (_bundleCache.ContainsKey(doc.PathName))
{
paths = _texturePathCache[doc.PathName];
return(_bundleCache[doc.PathName]);
}
_texturePathCache.Add(doc.PathName, new List <string>());
// Find materials
FilteredElementCollector fec = new FilteredElementCollector(doc).OfClass(typeof(Material));
// Convert materials to bundles
List <TextureBundle> bundles = new List <TextureBundle>();
foreach (var m in fec.Cast <Material>())
{
try
{
var bundle = new TextureBundle(m);
ElementId appearanceAssetId = m.AppearanceAssetId;
AppearanceAssetElement appearanceAssetElem
= doc.GetElement(appearanceAssetId)
as AppearanceAssetElement;
if (appearanceAssetElem == null)
{
continue;
}
Asset asset = appearanceAssetElem
.GetRenderingAsset();
if (asset == null)
{
continue;
}
for (int assetIdx = 0; assetIdx < asset.Size; assetIdx++)
{
AssetProperty aProperty = asset[assetIdx];
if (aProperty.NumberOfConnectedProperties < 1)
{
continue;
}
Asset connectedAsset = aProperty
.GetConnectedProperty(0) as Asset;
// See if there is a path associated.
#if REVIT2018 || REVIT2019 || REVIT2020
// This line is 2018.1 & up because of the
// property reference to UnifiedBitmap
// .UnifiedbitmapBitmap. In earlier versions,
// you can still reference the string name
// instead: "unifiedbitmap_Bitmap"
AssetPropertyString path = connectedAsset[
UnifiedBitmap.UnifiedbitmapBitmap]
as AssetPropertyString;
#else
AssetPropertyString path =
connectedAsset["unifiedbitmap_Bitmap"] as AssetPropertyString;
#endif
// If there is no asset path, nothing to pursue (Empty field)
if (path == null || String.IsNullOrEmpty(path.Value))
{
continue;
}
// See what kind of texture it is.
if (TryGetTextureTypeFromAssetName(connectedAsset.Name, out var t))
{
// This will be a relative path to the
// built -in materials folder, addiitonal
// render appearance folder, or an
// absolute path.
string assetName = Path.GetFileNameWithoutExtension(path.Value);
// Ensure that we have a valid texture path.
if (RevitTextures.ContainsKey(assetName))
{
bundle.TexturePaths.Add(t, new SafenedFilename(RevitTextures[assetName]));
}
else
{
//Logger.LogError(
// $"Found asset outisde of Revit material lib: {path.Value}. Could not add to export"
// );
}
}
}
// Return the bundle we created.
bundles.Add(bundle);
}
catch (Exception e)
{
//Logger.LogException("Error in bundle creation: ", e);
}
}
var bundleList = bundles.Where(b => b != null).ToList();
_bundleCache.Add(doc.PathName, bundleList);
paths = _texturePathCache[doc.PathName];
return(bundleList);
}
public static Assimp.Material ConvertToAssimpMaterial(TextureBundle bundle, Document doc)
{
// Create new material with base props
// from the Revit material
var newmat = new Assimp.Material()
{
Opacity = bundle.Material.GetOpacity(),
Reflectivity = 0f,
Name = bundle.Material.Name,
ColorDiffuse = bundle.Material.ToColor4D()
};
// Extract base properties from revit material
ElementId appearanceAssetId = bundle.Material.AppearanceAssetId;
AppearanceAssetElement appearanceAsset = doc.GetElement(appearanceAssetId) as AppearanceAssetElement;
Asset renderingAsset = appearanceAsset.GetRenderingAsset();
RenderAppearanceDescriptor rad
= new RenderAppearanceDescriptor(renderingAsset);
PropertyDescriptorCollection collection = rad.GetProperties();
List <PropertyDescriptor> orderableCollection = new List <PropertyDescriptor>(collection.Count);
List <string> allPropNames = orderableCollection.Select(f => f.Name).ToList();
foreach (PropertyDescriptor descr in collection)
{
orderableCollection.Add(descr);
switch (descr.Name)
{
#region Notes
// The commented out properties aren't in use yet,
// but do work with revit materials as expected.
//case "texture_UScale":
// var uScale = renderingAsset["texture_UScale"] as AssetPropertyDouble;
// break;
//case "texture_VScale":
// break;
//case "texture_UOffset":
// break;
//case "texture_VOffset":
// break;
//case "texture_RealWorldScaleX":
// var xScale = renderingAsset["texture_RealWorldScaleX"] as AssetPropertyDistance;
// break;
//case "texture_RealWorldScaleY":
// break;
#endregion
case "generic_diffuse":
var prop = renderingAsset.GetAssetProperty <AssetPropertyDoubleArray4d>("generic_diffuse");
newmat.ColorDiffuse = ColorFromAssetDoubleArray4d(prop);
break;
case "glazing_reflectance":
// This is glass, so we should reduce the transparency.
var refl = renderingAsset.GetAssetProperty <AssetPropertyDouble>("glazing_reflectance");
if (refl == null)
{
var reflFloat = renderingAsset.GetAssetProperty <AssetPropertyFloat>("glazing_reflectance");
newmat.Reflectivity = reflFloat?.Value ?? 0f;
}
else
{
newmat.Reflectivity = (float)refl.Value;
}
newmat.Opacity = Math.Abs(0f - newmat.Reflectivity);
break;
case "common_Tint_color":
// Tint shouldn't be used if generic diffuse is set
if (
renderingAsset.GetAssetProperty <AssetPropertyDoubleArray4d>("generic_diffuse") != null
)
{
continue;
}
var tintProp = renderingAsset.GetAssetProperty <AssetPropertyDoubleArray4d>("common_Tint_color");
newmat.ColorDiffuse = ColorFromAssetDoubleArray4d(tintProp);
break;
default:
break;
}
}
// Set textures
foreach (var tx in bundle.TexturePaths)
{
// Get the filename
var txFileName = tx.Value.SafeFileName;
if (tx.Key == RevitTextureType.Color)
{
newmat.TextureDiffuse = new TextureSlot(
$"Textures/{txFileName}",
TextureType.Diffuse,
0, // Texture index in the material
TextureMapping.Box,
0, //
0.5f, // Blend mode
TextureOperation.Add,
TextureWrapMode.Clamp,
TextureWrapMode.Clamp,
0 // Flags,
);
}
else if (tx.Key == RevitTextureType.Bump)
{
newmat.TextureHeight = new TextureSlot(
$"Textures/{txFileName}",
TextureType.Diffuse,
0, // Texture index in the material
TextureMapping.Box,
0, //
0.5f, // Blend mode
TextureOperation.Add,
TextureWrapMode.Clamp,
TextureWrapMode.Clamp,
0 // Flags,
);
}
}
return(newmat);
}