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RhinoDocGltfConverter.cs
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RhinoDocGltfConverter.cs
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Rhino.DocObjects;
using Rhino;
using glTFLoader.Schema;
using Rhino.Render;
using Rhino.Display;
namespace glTF_BinExporter
{
public class ObjectExportData
{
public Rhino.Geometry.Mesh[] Meshes = null;
public Rhino.Geometry.Transform Transform = Rhino.Geometry.Transform.Identity;
public RenderMaterial RenderMaterial = null;
public RhinoObject Object = null;
}
class RhinoDocGltfConverter
{
public RhinoDocGltfConverter(glTFExportOptions options, bool binary, RhinoDoc doc, IEnumerable<RhinoObject> objects, LinearWorkflow workflow)
{
this.doc = doc;
this.options = options;
this.binary = binary;
this.objects = objects;
this.workflow = workflow;
}
public RhinoDocGltfConverter(glTFExportOptions options, bool binary, RhinoDoc doc, LinearWorkflow workflow)
{
this.doc = doc;
this.options = options;
this.binary = binary;
this.objects = doc.Objects;
this.workflow = null;
}
private RhinoDoc doc = null;
private IEnumerable<RhinoObject> objects = null;
private bool binary = false;
private glTFExportOptions options = null;
private LinearWorkflow workflow = null;
private Dictionary<Guid, int> materialsMap = new Dictionary<Guid, int>();
private gltfSchemaDummy dummy = new gltfSchemaDummy();
private List<byte> binaryBuffer = new List<byte>();
private Dictionary<int, Node> layers = new Dictionary<int, Node>();
private RenderMaterial defaultMaterial = null;
private RenderMaterial DefaultMaterial
{
get
{
if(defaultMaterial == null)
{
defaultMaterial = Rhino.DocObjects.Material.DefaultMaterial.RenderMaterial;
}
return defaultMaterial;
}
}
public Gltf ConvertToGltf()
{
dummy.Scene = 0;
dummy.Scenes.Add(new gltfSchemaSceneDummy());
dummy.Asset = new Asset()
{
Version = "2.0",
};
dummy.Samplers.Add(new Sampler()
{
MinFilter = Sampler.MinFilterEnum.LINEAR,
MagFilter = Sampler.MagFilterEnum.LINEAR,
WrapS = Sampler.WrapSEnum.REPEAT,
WrapT = Sampler.WrapTEnum.REPEAT,
});
if(options.UseDracoCompression)
{
dummy.ExtensionsUsed.Add(glTFExtensions.KHR_draco_mesh_compression.Tag);
dummy.ExtensionsRequired.Add(glTFExtensions.KHR_draco_mesh_compression.Tag);
}
dummy.ExtensionsUsed.Add(glTFExtensions.KHR_materials_transmission.Tag);
dummy.ExtensionsUsed.Add(glTFExtensions.KHR_materials_clearcoat.Tag);
dummy.ExtensionsUsed.Add(glTFExtensions.KHR_materials_ior.Tag);
dummy.ExtensionsUsed.Add(glTFExtensions.KHR_materials_specular.Tag);
var sanitized = SanitizeRhinoObjects(objects);
foreach(ObjectExportData exportData in sanitized)
{
int? materialIndex = GetMaterial(exportData.RenderMaterial, exportData.Object);
RhinoMeshGltfConverter meshConverter = new RhinoMeshGltfConverter(exportData, materialIndex, options, binary, dummy, binaryBuffer);
int meshIndex = meshConverter.AddMesh();
glTFLoader.Schema.Node node = new glTFLoader.Schema.Node()
{
Mesh = meshIndex,
Name = GetObjectName(exportData.Object),
};
int nodeIndex = dummy.Nodes.AddAndReturnIndex(node);
if(options.ExportLayers)
{
AddToLayer(doc.Layers[exportData.Object.Attributes.LayerIndex], nodeIndex);
}
else
{
dummy.Scenes[dummy.Scene].Nodes.Add(nodeIndex);
}
}
if (binary && binaryBuffer.Count > 0)
{
//have to add the empty buffer for the binary file header
dummy.Buffers.Add(new glTFLoader.Schema.Buffer()
{
ByteLength = (int)binaryBuffer.Count,
Uri = null,
});
}
return dummy.ToSchemaGltf();
}
private void AddToLayer(Layer layer, int child)
{
if(layers.TryGetValue(layer.Index, out Node node))
{
if (node.Children == null)
{
node.Children = new int[1] { child };
}
else
{
node.Children = node.Children.Append(child).ToArray();
}
}
else
{
node = new Node()
{
Name = layer.Name,
Children = new int[1] { child },
};
layers.Add(layer.Index, node);
int nodeIndex = dummy.Nodes.AddAndReturnIndex(node);
Layer parentLayer = doc.Layers.FindId(layer.ParentLayerId);
if (parentLayer == null)
{
dummy.Scenes[dummy.Scene].Nodes.Add(nodeIndex);
}
else
{
AddToLayer(parentLayer, nodeIndex);
}
}
}
public string GetObjectName(RhinoObject rhinoObject)
{
return string.IsNullOrEmpty(rhinoObject.Name) ? null : rhinoObject.Name;
}
public byte[] GetBinaryBuffer()
{
return binaryBuffer.ToArray();
}
int? GetMaterial(RenderMaterial material, RhinoObject rhinoObject)
{
if(!options.ExportMaterials)
{
return null;
}
if(material == null && options.UseDisplayColorForUnsetMaterials)
{
Color4f objectColor = GetObjectColor(rhinoObject);
return CreateSolidColorMaterial(objectColor);
}
else if(material == null)
{
material = DefaultMaterial;
}
Guid materialId = material.Id;
if(!materialsMap.TryGetValue(materialId, out int materialIndex))
{
RhinoMaterialGltfConverter materialConverter = new RhinoMaterialGltfConverter(options, binary, dummy, binaryBuffer, material, workflow);
materialIndex = materialConverter.AddMaterial();
materialsMap.Add(materialId, materialIndex);
}
return materialIndex;
}
int CreateSolidColorMaterial(Color4f color)
{
glTFLoader.Schema.Material material = new glTFLoader.Schema.Material()
{
PbrMetallicRoughness = new MaterialPbrMetallicRoughness()
{
BaseColorFactor = color.ToFloatArray(),
}
};
return dummy.Materials.AddAndReturnIndex(material);
}
Color4f GetObjectColor(RhinoObject rhinoObject)
{
if(rhinoObject.Attributes.ColorSource == ObjectColorSource.ColorFromLayer)
{
int layerIndex = rhinoObject.Attributes.LayerIndex;
return new Color4f(rhinoObject.Document.Layers[layerIndex].Color);
}
else
{
return new Color4f(rhinoObject.Attributes.ObjectColor);
}
}
public Rhino.Geometry.Mesh[] GetMeshes(RhinoObject rhinoObject)
{
if (rhinoObject.ObjectType == ObjectType.Mesh)
{
MeshObject meshObj = rhinoObject as MeshObject;
return new Rhino.Geometry.Mesh[] { meshObj.MeshGeometry };
}
else if(rhinoObject.ObjectType == ObjectType.SubD)
{
SubDObject subdObject = rhinoObject as SubDObject;
Rhino.Geometry.SubD subd = subdObject.Geometry as Rhino.Geometry.SubD;
Rhino.Geometry.Mesh mesh = null;
if (options.SubDExportMode == SubDMode.ControlNet)
{
mesh = Rhino.Geometry.Mesh.CreateFromSubDControlNet(subd);
}
else
{
int level = options.SubDLevel;
mesh = Rhino.Geometry.Mesh.CreateFromSubD(subd, level);
}
return new Rhino.Geometry.Mesh[] { mesh };
}
// Need to get a Mesh from the None-mesh object. Using the FastRenderMesh here. Could be made configurable.
// First make sure the internal rhino mesh has been created
rhinoObject.CreateMeshes(Rhino.Geometry.MeshType.Preview, Rhino.Geometry.MeshingParameters.FastRenderMesh, true);
// Then get the internal rhino meshes
Rhino.Geometry.Mesh[] meshes = rhinoObject.GetMeshes(Rhino.Geometry.MeshType.Preview);
List<Rhino.Geometry.Mesh> validMeshes = new List<Rhino.Geometry.Mesh>();
foreach (Rhino.Geometry.Mesh mesh in meshes)
{
if (MeshIsValidForExport(mesh))
{
mesh.EnsurePrivateCopy();
validMeshes.Add(mesh);
}
}
return validMeshes.ToArray();
}
public bool MeshIsValidForExport(Rhino.Geometry.Mesh mesh)
{
if (mesh == null)
{
return false;
}
if (mesh.Vertices.Count == 0)
{
return false;
}
if (mesh.Faces.Count == 0)
{
return false;
}
if(!options.ExportOpenMeshes && !mesh.IsClosed)
{
return false;
}
return true;
}
private string GetDebugName(RhinoObject rhinoObject)
{
if (string.IsNullOrEmpty(rhinoObject.Name))
{
return "(Unnamed)";
}
return rhinoObject.Name;
}
public List<ObjectExportData> SanitizeRhinoObjects(IEnumerable<RhinoObject> rhinoObjects)
{
List<ObjectExportData> explodedObjects = new List<ObjectExportData>();
foreach (var rhinoObject in rhinoObjects)
{
if (rhinoObject.ObjectType == ObjectType.InstanceReference && rhinoObject is InstanceObject instanceObject)
{
List<RhinoObject> pieces = new List<RhinoObject>();
List<Rhino.Geometry.Transform> transforms = new List<Rhino.Geometry.Transform>();
ExplodeRecursive(instanceObject, Rhino.Geometry.Transform.Identity, pieces, transforms);
foreach (var item in pieces.Zip(transforms, (rObj, trans) => (rhinoObject: rObj, trans)))
{
explodedObjects.Add(new ObjectExportData()
{
Object = item.rhinoObject,
Transform = item.trans,
RenderMaterial = GetObjectMaterial(item.rhinoObject),
});
}
}
else
{
explodedObjects.Add(new ObjectExportData()
{
Object = rhinoObject,
RenderMaterial = GetObjectMaterial(rhinoObject),
});
}
}
//Remove Unmeshable
explodedObjects.RemoveAll(x => !x.Object.IsMeshable(Rhino.Geometry.MeshType.Any));
foreach (var item in explodedObjects)
{
//Mesh
if (item.Object.ObjectType == ObjectType.SubD && item.Object.Geometry is Rhino.Geometry.SubD subd)
{
if (options.SubDExportMode == SubDMode.ControlNet)
{
Rhino.Geometry.Mesh mesh = Rhino.Geometry.Mesh.CreateFromSubDControlNet(subd);
mesh.Transform(item.Transform);
item.Meshes = new Rhino.Geometry.Mesh[] { mesh };
}
else
{
int level = options.SubDLevel;
Rhino.Geometry.Mesh mesh = Rhino.Geometry.Mesh.CreateFromSubD(subd, level);
mesh.Transform(item.Transform);
item.Meshes = new Rhino.Geometry.Mesh[] { mesh };
}
}
else
{
Rhino.Geometry.MeshingParameters parameters = item.Object.GetRenderMeshParameters();
if (item.Object.MeshCount(Rhino.Geometry.MeshType.Render, parameters) == 0)
{
item.Object.CreateMeshes(Rhino.Geometry.MeshType.Render, parameters, false);
}
List<Rhino.Geometry.Mesh> meshes = new List<Rhino.Geometry.Mesh>(item.Object.GetMeshes(Rhino.Geometry.MeshType.Render));
foreach (Rhino.Geometry.Mesh mesh in meshes)
{
mesh.EnsurePrivateCopy();
mesh.Transform(item.Transform);
}
//Remove bad meshes
meshes.RemoveAll(x => x == null || !MeshIsValidForExport(x));
item.Meshes = meshes.ToArray();
}
}
//Remove meshless objects
explodedObjects.RemoveAll(x => x.Meshes.Length == 0);
return explodedObjects;
}
private RenderMaterial GetObjectMaterial(Rhino.DocObjects.RhinoObject rhinoObject)
{
ObjectMaterialSource source = rhinoObject.Attributes.MaterialSource;
Rhino.Render.RenderMaterial renderMaterial = null;
if(source == ObjectMaterialSource.MaterialFromObject)
{
renderMaterial = rhinoObject.RenderMaterial;
}
else if (source == ObjectMaterialSource.MaterialFromLayer)
{
int layerIndex = rhinoObject.Attributes.LayerIndex;
renderMaterial = GetLayerMaterial(layerIndex);
}
return renderMaterial;
}
private Rhino.Render.RenderMaterial GetLayerMaterial(int layerIndex)
{
if(layerIndex < 0 || layerIndex >= doc.Layers.Count)
{
return null;
}
return doc.Layers[layerIndex].RenderMaterial;
}
private void ExplodeRecursive(InstanceObject instanceObject, Rhino.Geometry.Transform instanceTransform, List<RhinoObject> pieces, List<Rhino.Geometry.Transform> transforms)
{
for (int i = 0; i < instanceObject.InstanceDefinition.ObjectCount; i++)
{
RhinoObject rhinoObject = instanceObject.InstanceDefinition.Object(i);
if (rhinoObject is InstanceObject nestedObject)
{
Rhino.Geometry.Transform nestedTransform = instanceTransform * nestedObject.InstanceXform;
ExplodeRecursive(nestedObject, nestedTransform, pieces, transforms);
}
else
{
pieces.Add(rhinoObject);
transforms.Add(instanceTransform);
}
}
}
}
}