public static List<Mesh3d> LoadSceneFromCollada(string infile)
{
List<Mesh3d> infos = new List<Mesh3d>();
XDocument xml = XDocument.Load(infile);
var colladaNode = xml.Elements().First();
var lib = colladaNode.SelectSingle("library_geometries");
var geometries = lib.SelectMany("geometry");
foreach(var geom in geometries)
{
try
{
string geoID = geom.Attribute("id").Value;
string geoName = geom.Attribute("name").Value;
List<float> xyzs = geom.SelectSingle("mesh").SelectMany("source").ElementAt(0).SelectSingle("float_array").Value.Split(new char[] { ' ' }).Select<string, float>((a) => float.Parse(a, System.Globalization.NumberFormatInfo.InvariantInfo)).ToList();
List<float> normals = geom.SelectSingle("mesh").SelectMany("source").ElementAt(1).SelectSingle("float_array").Value.Trim().Split(new char[] { ' ' }).Select<string, float>((a) => float.Parse(a, System.Globalization.NumberFormatInfo.InvariantInfo)).ToList();
List<float> uvs = null;
try
{
uvs = geom.SelectSingle("mesh").SelectMany("source").ElementAt(2).SelectSingle("float_array").Value.Trim().Split(new char[] { ' ' }).Select<string, float>((a) => float.Parse(a, System.Globalization.NumberFormatInfo.InvariantInfo)).ToList();
}
catch
{
uvs = new List<float>();
}
List<int> indices = geom.SelectSingle("mesh").SelectSingle("polylist").SelectSingle("p").Value.Trim().Split(new char[] { ' ' }).Select<string, int>((a) => int.Parse(a)).ToList();
List<float> VBO = new List<float>();
List<uint> indicesNew = new List<uint>();
uint vcount = 0;
for(int i = 0; i < indices.Count; )
{
int vid = indices[i] * 3;
int nid = indices[i + 1] * 3;
int uid = indices[i + 2] * 2;
indicesNew.Add(vcount++);
VBO.AddRange(new float[] { -xyzs[vid + 1], xyzs[vid + 2], -xyzs[vid] });
if(uvs.Count > 0)
{
VBO.AddRange(new float[] { uvs[uid], uvs[uid + 1] });
i += 3;
}
else
{
VBO.AddRange(new float[] { 0, 0 });
i += 2;
}
VBO.AddRange(new float[] { -normals[nid + 1], normals[nid + 2], -normals[nid] });
}
var objinfo = new Object3dInfo(VBO, indicesNew);
var transformationNode = colladaNode.SelectSingle("library_visual_scenes").SelectSingle("visual_scene").SelectMany("node").First((a) => a.SelectSingle("instance_geometry").Attribute("url").Value == "#" + geoID);
var mesh = new Mesh3d(objinfo, new GenericMaterial(Color.White));
List<float> transVector = transformationNode.SelectMany("translate").First((a) => a.Attribute("sid").Value == "location").Value.Trim().Split(new char[] { ' ' }).Select<string, float>((a) => float.Parse(a, System.Globalization.NumberFormatInfo.InvariantInfo)).ToList();
List<List<float>> rots = transformationNode.SelectMany("rotate").Select<XElement, List<float>>((a) => a.Value.Trim().Split(new char[] { ' ' }).Select<string, float>((ax) => float.Parse(ax, System.Globalization.NumberFormatInfo.InvariantInfo)).ToList()).ToList();
List<float> scale = transformationNode.SelectMany("scale").First((a) => a.Attribute("sid").Value == "scale").Value.Trim().Split(new char[] { ' ' }).Select<string, float>((a) => float.Parse(a, System.Globalization.NumberFormatInfo.InvariantInfo)).ToList();
mesh.Translate(-transVector[1], transVector[2], -transVector[0]);
foreach(var r in rots)
mesh.Rotate(Quaternion.FromAxisAngle(new Vector3(-r[1], r[2], -r[0]), MathHelper.DegreesToRadians(r[3])));
mesh.Scale(scale[1], scale[2], scale[0]);
infos.Add(mesh);
}
catch
{
}
}
return infos;
}