private bool SetDracoGeometryInfo(Mesh rhinoMesh)
{
var dracoComp = DracoCompression.Compress(
rhinoMesh,
new DracoCompressionOptions()
{
VertexColorFormat = DracoColorFormat.RGBA,
CompressionLevel = options.DracoCompressionLevel,
IncludeNormals = ExportNormals(rhinoMesh),
IncludeTextureCoordinates = ExportTextureCoordinates(rhinoMesh),
IncludeVertexColors = ExportVertexColors(rhinoMesh),
PositionQuantizationBits = options.DracoQuantizationBitsPosition,
NormalQuantizationBits = options.DracoQuantizationBitsNormal,
TextureCoordintateQuantizationBits = options.DracoQuantizationBitsTexture
}
);
currentGeometryInfo = AddDracoGeometry(dracoComp);
return(currentGeometryInfo.Success);
}
public DracoGeometryInfo AddDracoGeometry(DracoCompression dracoCompression)
{
var dracoGeoInfo = new DracoGeometryInfo();
string fileName = Path.GetTempFileName();
try
{
dracoCompression.Write(fileName);
dracoGeoInfo.VertexAttributePosition = dracoCompression.VertexAttributePosition;
dracoGeoInfo.NormalAttributePosition = dracoCompression.NormalAttributePosition;
dracoGeoInfo.TextureCoordinatesAttributePosition = dracoCompression.TextureCoordinatesAttributePosition;
dracoGeoInfo.VertexColorAttributePosition = dracoCompression.VertexColorAttributePosition;
byte[] dracoBytes = GetDracoBytes(fileName);
WriteDracoBytes(dracoBytes, out dracoGeoInfo.BufferIndex, out dracoGeoInfo.ByteOffset, out dracoGeoInfo.ByteLength);
glTFLoader.Schema.BufferView compMeshBufferView = new glTFLoader.Schema.BufferView()
{
Buffer = dracoGeoInfo.BufferIndex,
ByteOffset = dracoGeoInfo.ByteOffset,
ByteLength = dracoGeoInfo.ByteLength,
};
dracoGeoInfo.BufferViewIndex = dummy.BufferViews.AddAndReturnIndex(compMeshBufferView);
dracoGeoInfo.ByteLength = dracoBytes.Length;
var geo = DracoCompression.DecompressFile(fileName);
if (geo.ObjectType == Rhino.DocObjects.ObjectType.Mesh)
{
var mesh = (Rhino.Geometry.Mesh)geo;
// Vertices Stats
dracoGeoInfo.VerticesCount = mesh.Vertices.Count;
dracoGeoInfo.VerticesMin = new Point3d(mesh.Vertices.Min());
dracoGeoInfo.VerticesMax = new Point3d(mesh.Vertices.Max());
dracoGeoInfo.IndicesCount = mesh.Faces.TriangleCount;
dracoGeoInfo.IndicesMin = 0;
dracoGeoInfo.IndicesMax = dracoGeoInfo.VerticesCount - 1;
dracoGeoInfo.NormalsCount = mesh.Normals.Count;
dracoGeoInfo.NormalsMin = mesh.Normals.Min();
dracoGeoInfo.NormalsMax = mesh.Normals.Max();
// TexCoord Stats
dracoGeoInfo.TexCoordsCount = mesh.TextureCoordinates.Count;
if (dracoGeoInfo.TexCoordsCount > 0)
{
dracoGeoInfo.TexCoordsMin = mesh.TextureCoordinates.Min();
dracoGeoInfo.TexCoordsMax = mesh.TextureCoordinates.Max();
}
dracoGeoInfo.VertexColorCount = mesh.VertexColors.Count;
dracoGeoInfo.VertexColorMin = Color4f.Black;
dracoGeoInfo.VertexColorMax = Color4f.White;
dracoGeoInfo.Success = true;
}
geo.Dispose();
dracoCompression.Dispose();
}
finally
{
File.Delete(fileName);
}
return(dracoGeoInfo);
}
public DracoGeometryInfo AddDracoGeometry(DracoCompression dracoCompression)
{
var dracoGeoInfo = new DracoGeometryInfo();
string fileName = Path.GetTempFileName();
try
{
dracoCompression.Write(fileName);
byte[] dracoBytes = GetDracoBytes(fileName);
WriteDracoBytes(dracoBytes, out dracoGeoInfo.bufferIndex, out dracoGeoInfo.byteOffset);
dracoGeoInfo.byteLength = dracoBytes.Length;
var geo = DracoCompression.DecompressFile(fileName);
if (geo.ObjectType == ObjectType.Mesh)
{
var mesh = (Rhino.Geometry.Mesh)geo;
Point2f point2f;
Point3f point3f;
Vector3f vector3f;
// Vertices Stats
dracoGeoInfo.verticesNum = mesh.Vertices.Count;
point3f = mesh.Vertices.Min();
dracoGeoInfo.verticesMin = new float[] { point3f.X, point3f.Y, point3f.Z };
point3f = mesh.Vertices.Max();
dracoGeoInfo.verticesMax = new float[] { point3f.X, point3f.Y, point3f.Z };
// Triangle Stats
dracoGeoInfo.trianglesNum = mesh.Faces.TriangleCount;
dracoGeoInfo.trianglesMin = 0;
dracoGeoInfo.trianglesMax = dracoGeoInfo.verticesNum - 1;
// Normals Stats
dracoGeoInfo.normalsNum = mesh.Normals.Count;
vector3f = mesh.Normals.Min();
dracoGeoInfo.normalsMin = new float[] { vector3f.X, vector3f.Y, vector3f.Z };
vector3f = mesh.Normals.Max();
dracoGeoInfo.normalsMax = new float[] { vector3f.X, vector3f.Y, vector3f.Z };
// TexCoord Stats
dracoGeoInfo.texCoordsNum = mesh.TextureCoordinates.Count;
if (dracoGeoInfo.texCoordsNum > 0)
{
point2f = mesh.TextureCoordinates.Min();
dracoGeoInfo.texCoordsMin = new float[] { point2f.X, point2f.Y };
point2f = mesh.TextureCoordinates.Max();
dracoGeoInfo.texCoordsMax = new float[] { point2f.X, point2f.Y };
}
dracoGeoInfo.success = true;
}
geo.Dispose();
dracoCompression.Dispose();
}
finally
{
File.Delete(fileName);
}
return(dracoGeoInfo);
}
private void AddRhinoObjectDraco(ObjectExportData data)
{
var materialIndex = GetMaterial(data.RenderMaterial, data.Object);
var primitives = new List <MeshPrimitive>();
// For each rhino mesh, create gl-buffers, gl-meshes, etc.
foreach (var rhinoMesh in data.Meshes)
{
if (options.MapRhinoZToGltfY)
{
rhinoMesh.Transform(ZtoYUp);
}
rhinoMesh.TextureCoordinates.ReverseTextureCoordinates(1);
var dracoComp = DracoCompression.Compress(
rhinoMesh,
new DracoCompressionOptions()
{
CompressionLevel = options.DracoCompressionLevel,
IncludeNormals = true,
IncludeTextureCoordinates = true,
IncludeVertexColors = false,
PositionQuantizationBits = options.DracoQuantizationBitsPosition,
NormalQuantizationBits = options.DracoQuantizationBitsNormal,
TextureCoordintateQuantizationBits = options.DracoQuantizationBitsTexture
}
);
DracoGeometryInfo dracoGeoInfo = AddDracoGeometry(dracoComp);
var compMeshBufferView = new BufferView()
{
Buffer = dracoGeoInfo.bufferIndex,
ByteOffset = dracoGeoInfo.byteOffset,
ByteLength = dracoGeoInfo.byteLength,
};
int compMeshBufferViewIdx = dummy.BufferViews.AddAndReturnIndex(compMeshBufferView);
var vtxAccessor = new Accessor
{
Type = Accessor.TypeEnum.VEC3,
ComponentType = Accessor.ComponentTypeEnum.FLOAT,
Count = dracoGeoInfo.verticesNum,
Min = dracoGeoInfo.verticesMin,
Max = dracoGeoInfo.verticesMax,
ByteOffset = 0,
};
int vtxAccessorIdx = dummy.Accessors.AddAndReturnIndex(vtxAccessor);
// // Accessor Triangles Vertex IDs
var idsAccessor = new Accessor
{
Type = Accessor.TypeEnum.SCALAR,
ComponentType = Accessor.ComponentTypeEnum.UNSIGNED_INT,
Count = dracoGeoInfo.trianglesNum,
Min = new float[] { dracoGeoInfo.trianglesMin },
Max = new float[] { dracoGeoInfo.trianglesMax },
ByteOffset = 0,
};
int idsAccessorIdx = dummy.Accessors.AddAndReturnIndex(idsAccessor);
// Accessor Normals
var normalsAccessor = new Accessor
{
Type = Accessor.TypeEnum.VEC3,
ComponentType = Accessor.ComponentTypeEnum.FLOAT,
Count = dracoGeoInfo.normalsNum,
Min = dracoGeoInfo.normalsMin,
Max = dracoGeoInfo.normalsMax,
ByteOffset = 0,
};
int normalsAccessorIdx = dummy.Accessors.AddAndReturnIndex(normalsAccessor);
var primitive = new MeshPrimitive()
{
Attributes = new Dictionary <string, int>()
{
{ Constants.PositionAttributeTag, vtxAccessorIdx },
{ Constants.NormalAttributeTag, normalsAccessorIdx },
},
Indices = idsAccessorIdx,
Material = materialIndex,
};
if (dracoGeoInfo.texCoordsNum > 0)
{
// Accessor TexCoords
var texCoordsAccessor = new Accessor
{
Type = Accessor.TypeEnum.VEC2,
ComponentType = Accessor.ComponentTypeEnum.FLOAT,
Count = dracoGeoInfo.texCoordsNum,
Min = dracoGeoInfo.texCoordsMin,
Max = dracoGeoInfo.texCoordsMax,
ByteOffset = 0,
};
int texCoordsAccessorIdx = dummy.Accessors.AddAndReturnIndex(texCoordsAccessor);
primitive.Attributes.Add(Constants.TexCoord0AttributeTag, texCoordsAccessorIdx);
primitive.Extensions = new Dictionary <string, object>()
{
{
Constants.DracoMeshCompressionExtensionTag,
new
{
bufferView = compMeshBufferViewIdx,
attributes = new
{
POSITION = 0,
NORMAL = 1,
TEXCOORD_0 = 2
}
}
}
};
}
else
{
primitive.Extensions = new Dictionary <string, object>()
{
{
Constants.DracoMeshCompressionExtensionTag,
new
{
bufferView = compMeshBufferViewIdx,
attributes = new
{
POSITION = 0,
NORMAL = 1,
}
}
}
};
}
// Create mesh
primitives.Add(primitive);
}
var mesh = new glTFLoader.Schema.Mesh()
{
Primitives = primitives.ToArray(),
};
int meshIndex = dummy.Meshes.AddAndReturnIndex(mesh);
var node = new Node()
{
Mesh = meshIndex,
};
int nodeIndex = dummy.Nodes.AddAndReturnIndex(node);
dummy.Scenes[dummy.Scene].Nodes.Add(nodeIndex);
}