private static ModelNode LoadNode(JObject data)
{
if (data == null)
{
return(null);
}
ModelNode result;
if (data.ContainsKey("parts"))
{
// Mesh
var mesh = new MeshNode();
var partsData = (JArray)data["parts"];
foreach (JObject partData in partsData)
{
var newPart = new MeshPart
{
MeshPartId = partData["meshpartid"].ToString(),
MaterialId = partData["materialid"].ToString()
};
if (partData.ContainsKey("bones"))
{
var bonesData = (JArray)partData["bones"];
foreach (JObject boneData in bonesData)
{
var bone = LoadBone(boneData);
newPart.Bones.Add(bone);
}
}
mesh.Parts.Add(newPart);
}
result = mesh;
}
else
{
result = new ModelNode();
}
result.Id = data.GetId();
result.DefaultTransform = result.Transform = LoadTransform(data);
if (data.ContainsKey("children"))
{
var children = (JArray)data["children"];
foreach (JObject child in children)
{
var childNode = LoadNode(child);
childNode.Parent = result;
result.Children.Add(childNode);
}
}
return(result);
}
private static void LoadMeshData(JObject meshData, Dictionary <string, MeshPart> meshes)
{
// Determine vertex type
int elementsPerRow;
var declaration = LoadDeclaration((JArray)meshData["attributes"], out elementsPerRow);
var vertices = (JArray)meshData["vertices"];
int bonesCount = 0;
foreach (var element in declaration.GetVertexElements())
{
if (element.VertexElementUsage != VertexElementUsage.BlendWeight)
{
continue;
}
if (element.UsageIndex + 1 > bonesCount)
{
bonesCount = element.UsageIndex + 1;
}
}
var bonesPerMesh = BonesPerMesh.None;
if (bonesCount >= 3)
{
bonesPerMesh = BonesPerMesh.Four;
}
else if (bonesCount == 2)
{
bonesPerMesh = BonesPerMesh.Two;
}
else if (bonesCount == 1)
{
bonesPerMesh = BonesPerMesh.One;
}
List <Vector3> positions;
var vertexBuffer = LoadVertexBuffer(ref declaration,
elementsPerRow,
vertices,
out positions);
var partsData = (JArray)meshData["parts"];
foreach (JObject partData in partsData)
{
var id = partData.GetId();
// var type = (PrimitiveType)Enum.Parse(typeof(PrimitiveType), partData.EnsureString("type"));
var partPositions = new List <Vector3>();
var indicesData = (JArray)partData["indices"];
var indices = new short[indicesData.Count];
for (var i = 0; i < indicesData.Count; ++i)
{
var idx = Convert.ToInt16(indicesData[i]);
indices[i] = idx;
partPositions.Add(positions[idx]);
}
var indexBuffer = new IndexBuffer(Nrs.GraphicsDevice, IndexElementSize.SixteenBits,
indices.Length, BufferUsage.None);
indexBuffer.SetData(indices);
var boundingSphere = BoundingSphere.CreateFromPoints(partPositions);
var mesh = new Mesh
{
IndexBuffer = indexBuffer,
VertexBuffer = vertexBuffer
};
meshes[id] = new MeshPart
{
Mesh = mesh,
BonesPerMesh = bonesPerMesh,
BoundingSphere = boundingSphere
};
}
}
