private static List <ModelGeometry> LoadGeometries(XElement geometryNode, SemanticAssociations association, List <Vector4> weights = null, List <Vector4> joints = null)
{
List <ModelGeometry> geometries = new List <ModelGeometry>();
//geometry
if (geometryNode.GetNode("mesh") != null)
{
//if mesh load data
var mesh = geometryNode.GetNode("mesh");
var sources = mesh.GetNodes("source");
var vertices = mesh.GetNodes("vertices");
//load data, only triangles supported
foreach (var elem in mesh.Elements())
{
ModelGeometry geometry = new ModelGeometry();
geometry.Name = geometryNode.GetAttribute("id");
//lines
//linestrips
switch (elem.Name.LocalName)
{
case "polygons":
break;
case "polylist":
break;
case "triangles":
GetTriangleMesh(geometry, elem, mesh, association, weights, joints);
geometry.Optimize();
geometries.Add(geometry);
break;
case "trifans":
break;
case "tristrips":
break;
default:
break;
}
}
}
return(geometries);
}
/// <summary>
/// Load From File
/// </summary>
/// <param name="filename">Filename</param>
/// <param name="association">Custom Semantic Association</param>
/// <returns>Model</returns>
public static ModelData Import(string filename, SemanticAssociations association)
{
ModelData data = new ModelData();
XDocument doc = XDocument.Load(filename);
//search for visual scene
//instance_visual_scene
XElement scene = doc.GetNode("instance_visual_scene");
if (scene == null)
{
return(null);
}
XElement sceneReference = doc.GetReference(scene);
data.Name = sceneReference.GetAttribute("name");
//Search for Nodes
foreach (XElement c in sceneReference.GetChildren("node"))
{
data.Nodes.Add(LoadNodes(c, association));
}
//Search for Animations
XElement animation = doc.GetNode("library_animations");
Animation anim = new Animation();
if (animation != null)
{
var list = animation.GetNodes("animation");
foreach (XElement a in list)
{
anim.Nodes.Add(CreateAnimationTrack(a));
}
}
data.Animations.Add(anim);
return(data);
}
private static ModelNode LoadNodes(XElement element, SemanticAssociations association)
{
ModelNode node = new ModelNode();
node.Name = element.GetAttribute("id");
//type
string type = element.GetAttribute("type").ToLower();
if (string.IsNullOrEmpty(type) || type == "node")
{
node.Type = NodeType.Node;
}
else
{
node.Type = NodeType.Joint;
}
//world matrix
node.World = ComputeMatrix(element);
//Iterate each node
foreach (XElement c in element.GetChildren("node"))
{
//Load Children
node.Children.Add(LoadNodes(c, association));
}
//Iterate Geometries
foreach (XElement g in element.GetNodes("instance_geometry"))
{
node.Geometries.AddRange(LoadGeometries(g.GetReference(), association));
}
//Get Animation Controller
foreach (XElement c in element.GetNodes("instance_controller"))
{
SkinInformation skin;
node.Geometries.AddRange(LoadController(c, association, out skin));
node.Skinning = skin;
}
return(node);
}
/// <summary>
/// Load From File
/// </summary>
/// <param name="filename">Filename</param>
/// <param name="association">Custom Semantic Association</param>
/// <returns>Model</returns>
public static ModelData Import(string filename, SemanticAssociations association)
{
ModelData data = new ModelData();
XDocument doc = XDocument.Load(filename);
//search for visual scene
//instance_visual_scene
XElement scene = doc.GetNode("instance_visual_scene");
if (scene == null)
return null;
XElement sceneReference = doc.GetReference(scene);
data.Name = sceneReference.GetAttribute("name");
//Search for Nodes
foreach (XElement c in sceneReference.GetChildren("node"))
{
data.Nodes.Add(LoadNodes(c, association));
}
//Search for Animations
XElement animation = doc.GetNode("library_animations");
Animation anim = new Animation();
if (animation != null)
{
var list = animation.GetNodes("animation");
foreach (XElement a in list)
anim.Nodes.Add(CreateAnimationTrack(a));
}
data.Animations.Add(anim);
return data;
}
private static ModelNode LoadNodes(XElement element, SemanticAssociations association)
{
ModelNode node = new ModelNode();
node.Name = element.GetAttribute("id");
//type
string type = element.GetAttribute("type").ToLower();
if (string.IsNullOrEmpty(type) || type == "node")
node.Type = NodeType.Node;
else
node.Type = NodeType.Joint;
//world matrix
node.World = ComputeMatrix(element);
//Iterate each node
foreach (XElement c in element.GetChildren("node"))
{
//Load Children
node.Children.Add(LoadNodes(c, association));
}
//Iterate Geometries
foreach (XElement g in element.GetNodes("instance_geometry"))
{
node.Geometries.AddRange(LoadGeometries(g.GetReference(), association));
}
//Get Animation Controller
foreach (XElement c in element.GetNodes("instance_controller"))
{
SkinInformation skin;
node.Geometries.AddRange(LoadController(c, association, out skin));
node.Skinning = skin;
}
return node;
}
private static List<ModelGeometry> LoadGeometries(XElement geometryNode, SemanticAssociations association, List<Vector4> weights = null, List<Vector4> joints = null)
{
List<ModelGeometry> geometries = new List<ModelGeometry>();
//geometry
if (geometryNode.GetNode("mesh") != null)
{
//if mesh load data
var mesh = geometryNode.GetNode("mesh");
var sources = mesh.GetNodes("source");
var vertices = mesh.GetNodes("vertices");
//load data, only triangles supported
foreach (var elem in mesh.Elements())
{
ModelGeometry geometry = new ModelGeometry();
geometry.Name = geometryNode.GetAttribute("id");
//lines
//linestrips
switch (elem.Name.LocalName)
{
case "polygons":
break;
case "polylist":
break;
case "triangles":
GetTriangleMesh(geometry, elem, mesh, association, weights, joints);
geometry.Optimize();
geometries.Add(geometry);
break;
case "trifans":
break;
case "tristrips":
break;
default:
break;
}
}
}
return geometries;
}
private static List<ModelGeometry> LoadController(XElement element, SemanticAssociations association, out SkinInformation skinInfo)
{
skinInfo = new SkinInformation();
XElement skin = element.GetReference().GetChild("skin");
if (skin == null)
{
//only skinned animation supported
throw new NotSupportedException("Only Skin Animation supported");
}
//target geometry
string geometryUrl = skin.GetAttribute("source");
//bind matrix
XElement bind = skin.GetChild("bind_shape_matrix");
if (bind == null)
skinInfo.BindMatrix = Matrix.Identity;
else
skinInfo.BindMatrix = MatrixFromString(bind.Value);
//load joint and input
XElement joints = skin.GetChild("joints");
var jointName = joints.GetChildren("input").Where(i => i.GetAttribute("semantic") == "JOINT").First();
skinInfo.JointNames = jointName.GetSource().Value.Replace('\n', ' ').Split(' ').Where(s => !string.IsNullOrWhiteSpace(s)).ToList();
var bindMatrix = joints.GetChildren("input").Where(i => i.GetAttribute("semantic") == "INV_BIND_MATRIX").First();
var values = GetFloatList(bindMatrix.GetSource().Value);
for (int i = 0; i < values.Count; i += 16)
{
skinInfo.InverseBinding.Add(new Matrix(values.GetRange(i, 16).ToArray()).ToTranspose());
}
//Weight
XElement vertex_weights = skin.GetChild("vertex_weights");
var weights = GetFloatList(vertex_weights.GetChildren("input").Where(i => i.GetAttribute("semantic") == "WEIGHT").First().GetSource().Value);
var v = GetIntList(vertex_weights.GetChild("v").Value);
var vCount = GetIntList(vertex_weights.GetChild("vcount").Value);
//Prepare vertex data
int k = 0;
List<Vector4> weightsTemp = new List<Vector4>();
List<Vector4> jointsTemp = new List<Vector4>();
foreach (int i in vCount)
{
Vector4 wei = new Vector4();
Vector4 joy = new Vector4();
for (int j = 0; j < i; j++)
{
switch (j)
{
case 0:
joy.X = v[k]; k++;
wei.X = weights[v[k]]; k++;
break;
case 1:
joy.Y = v[k]; k++;
wei.Y = weights[v[k]]; k++;
break;
case 2:
joy.Z = v[k]; k++;
wei.Z = weights[v[k]]; k++;
break;
case 3:
joy.W = v[k]; k++;
wei.W = weights[v[k]]; k++;
break;
default:
break;
}
}
float sum = wei.X + wei.Y + wei.Z + wei.W;
wei *= 1.0F / sum;
weightsTemp.Add(wei);
jointsTemp.Add(joy);
}
return LoadGeometries(element.Document.GetByID(geometryUrl.Replace("#", "")), association, weightsTemp, jointsTemp);
}
//Load Triangle Mesh
private static void GetTriangleMesh(ModelGeometry model, XElement triangle, XElement mesh, SemanticAssociations association, List<Vector4> weights = null, List<Vector4> joints = null)
{
//Indices
List<int> indices = GetIntList(triangle.GetNode("p").Value);
//Load Channel
var inputs = triangle.GetNodes("input");
List<ChannelData> inputData = new List<ChannelData>();
foreach (XElement elem in inputs)
{
inputData.Add(new ChannelData(elem));
}
//Load Material
model.Material = new MaterialData();
model.Material = GetMaterial(triangle.Document, triangle.GetAttribute("material"));
//Create Vertices
int k = 0;
while (k < indices.Count)
{
VertexFormat v = new VertexFormat();
foreach (ChannelData e in inputData)
{
var data = e.GetChannel(indices[k]);
switch (association[e.Semantic])
{
case ChannelCode.Position:
v.Position = new Vector3(data);
//Add weights and joints if loaded for skinned model
if (weights != null)
{
v.Weight = weights[indices[k]];
}
if (joints != null)
{
v.Joint = joints[indices[k]];
}
break;
case ChannelCode.Normal:
v.Normal = new Vector3(data);
break;
case ChannelCode.Tangent:
v.Tangent = new Vector3(data);
break;
case ChannelCode.Binormal:
v.Binormal = new Vector3(data);
break;
case ChannelCode.TexCoord1:
if (data.Length >= 2)
v.TextureSet1 = new Vector2(data.Take(2).ToArray());
break;
case ChannelCode.TexCoord2:
v.TextureSet2 = new Vector2(data.Take(2).ToArray());
break;
case ChannelCode.Joint:
v.Joint = new Vector4(data);
break;
case ChannelCode.Weight:
v.Weight = new Vector4(data);
break;
case ChannelCode.None:
break;
default:
break;
}
k++;
}
//Save to model
model.Vertices.Add(v);
model.Indices.Add(model.Indices.Count);
}
}
private static List <ModelGeometry> LoadController(XElement element, SemanticAssociations association, out SkinInformation skinInfo)
{
skinInfo = new SkinInformation();
XElement skin = element.GetReference().GetChild("skin");
if (skin == null)
{
//only skinned animation supported
throw new NotSupportedException("Only Skin Animation supported");
}
//target geometry
string geometryUrl = skin.GetAttribute("source");
//bind matrix
XElement bind = skin.GetChild("bind_shape_matrix");
if (bind == null)
{
skinInfo.BindMatrix = Matrix.Identity;
}
else
{
skinInfo.BindMatrix = MatrixFromString(bind.Value);
}
//load joint and input
XElement joints = skin.GetChild("joints");
var jointName = joints.GetChildren("input").Where(i => i.GetAttribute("semantic") == "JOINT").First();
skinInfo.JointNames = jointName.GetSource().Value.Replace('\n', ' ').Split(' ').Where(s => !string.IsNullOrWhiteSpace(s)).ToList();
var bindMatrix = joints.GetChildren("input").Where(i => i.GetAttribute("semantic") == "INV_BIND_MATRIX").First();
var values = GetFloatList(bindMatrix.GetSource().Value);
for (int i = 0; i < values.Count; i += 16)
{
skinInfo.InverseBinding.Add(new Matrix(values.GetRange(i, 16).ToArray()).ToTranspose());
}
//Weight
XElement vertex_weights = skin.GetChild("vertex_weights");
var weights = GetFloatList(vertex_weights.GetChildren("input").Where(i => i.GetAttribute("semantic") == "WEIGHT").First().GetSource().Value);
var v = GetIntList(vertex_weights.GetChild("v").Value);
var vCount = GetIntList(vertex_weights.GetChild("vcount").Value);
//Prepare vertex data
int k = 0;
List <Vector4> weightsTemp = new List <Vector4>();
List <Vector4> jointsTemp = new List <Vector4>();
foreach (int i in vCount)
{
Vector4 wei = new Vector4();
Vector4 joy = new Vector4();
for (int j = 0; j < i; j++)
{
switch (j)
{
case 0:
joy.X = v[k]; k++;
wei.X = weights[v[k]]; k++;
break;
case 1:
joy.Y = v[k]; k++;
wei.Y = weights[v[k]]; k++;
break;
case 2:
joy.Z = v[k]; k++;
wei.Z = weights[v[k]]; k++;
break;
case 3:
joy.W = v[k]; k++;
wei.W = weights[v[k]]; k++;
break;
default:
break;
}
}
float sum = wei.X + wei.Y + wei.Z + wei.W;
wei *= 1.0F / sum;
weightsTemp.Add(wei);
jointsTemp.Add(joy);
}
return(LoadGeometries(element.Document.GetByID(geometryUrl.Replace("#", "")), association, weightsTemp, jointsTemp));
}
//Load Triangle Mesh
private static void GetTriangleMesh(ModelGeometry model, XElement triangle, XElement mesh, SemanticAssociations association, List <Vector4> weights = null, List <Vector4> joints = null)
{
//Indices
List <int> indices = GetIntList(triangle.GetNode("p").Value);
//Load Channel
var inputs = triangle.GetNodes("input");
List <ChannelData> inputData = new List <ChannelData>();
foreach (XElement elem in inputs)
{
inputData.Add(new ChannelData(elem));
}
//Load Material
model.Material = new MaterialData();
model.Material = GetMaterial(triangle.Document, triangle.GetAttribute("material"));
//Create Vertices
int k = 0;
while (k < indices.Count)
{
VertexFormat v = new VertexFormat();
foreach (ChannelData e in inputData)
{
var data = e.GetChannel(indices[k]);
switch (association[e.Semantic])
{
case ChannelCode.Position:
v.Position = new Vector3(data);
//Add weights and joints if loaded for skinned model
if (weights != null)
{
v.Weight = weights[indices[k]];
}
if (joints != null)
{
v.Joint = joints[indices[k]];
}
break;
case ChannelCode.Normal:
v.Normal = new Vector3(data);
break;
case ChannelCode.Tangent:
v.Tangent = new Vector3(data);
break;
case ChannelCode.Binormal:
v.Binormal = new Vector3(data);
break;
case ChannelCode.TexCoord1:
if (data.Length >= 2)
{
v.TextureSet1 = new Vector2(data.Take(2).ToArray());
}
break;
case ChannelCode.TexCoord2:
v.TextureSet2 = new Vector2(data.Take(2).ToArray());
break;
case ChannelCode.Joint:
v.Joint = new Vector4(data);
break;
case ChannelCode.Weight:
v.Weight = new Vector4(data);
break;
case ChannelCode.None:
break;
default:
break;
}
k++;
}
//Save to model
model.Vertices.Add(v);
model.Indices.Add(model.Indices.Count);
}
}