public static MeshGeometry AssimpToLdd(Scene scene, Mesh mesh)
{
bool hasUVs = mesh.HasTextureCoords(0);
var builder = new GeometryBuilder();
var meshNode = Assimp.AssimpHelper.GetMeshNode(scene, mesh);
var meshTransform = Assimp.AssimpHelper.GetFinalTransform(meshNode).ToLDD();
for (int i = 0; i < mesh.VertexCount; i++)
{
builder.AddVertex(new Vertex()
{
Position = meshTransform.TransformPosition(mesh.Vertices[i].ToLDD()),
Normal = meshTransform.TransformNormal(mesh.Normals[i].ToLDD()),
TexCoord = hasUVs ? mesh.TextureCoordinateChannels[0][i].ToLDD().Xy : Simple3D.Vector2.Empty
}, false);
}
for (int i = 0; i < mesh.FaceCount; i++)
{
if (mesh.Faces[i].IndexCount != 3)
{
continue;
}
builder.AddTriangle(mesh.Faces[i].Indices[0], mesh.Faces[i].Indices[1], mesh.Faces[i].Indices[2]);
}
var geometry = builder.GetGeometry();
geometry.SimplifyVertices();
return(geometry);
}
public static MeshGeometry AssimpToLdd(Scene scene, Mesh mesh)
{
bool hasUVs = mesh.HasTextureCoords(0);
var builder = new GeometryBuilder();
var meshNode = Assimp.AssimpHelper.GetMeshNode(scene, mesh);
var meshTransform = Assimp.AssimpHelper.GetFinalTransform(meshNode).ToLDD();
for (int i = 0; i < mesh.VertexCount; i++)
{
builder.AddVertex(new Vertex()
{
Position = meshTransform.TransformPosition(mesh.Vertices[i].ToLDD()),
Normal = meshTransform.TransformNormal(mesh.Normals[i].ToLDD()),
TexCoord = hasUVs ? mesh.TextureCoordinateChannels[0][i].ToLDD().Xy : Simple3D.Vector2.Empty
}, false);
}
for (int i = 0; i < mesh.FaceCount; i++)
{
if (mesh.Faces[i].IndexCount != 3)
{
continue;
}
builder.AddTriangle(mesh.Faces[i].Indices[0], mesh.Faces[i].Indices[1], mesh.Faces[i].Indices[2]);
}
if (mesh.HasBones)
{
var boneNames = scene.Meshes.SelectMany(x => x.Bones).Select(x => x.Name).Distinct().ToList();
var boneNodes = Assimp.AssimpHelper.GetNodeHierarchy(scene.RootNode)
.Where(x => boneNames.Contains(x.Name)) /*.OrderBy(x => x.GetLevel())*/.ToList();
boneNames = boneNodes.Select(x => x.Name).ToList();//names in order
for (int i = 0; i < mesh.BoneCount; i++)
{
int boneIndex = boneNames.IndexOf(mesh.Bones[i].Name);
foreach (var vw in mesh.Bones[i].VertexWeights)
{
builder.Vertices[vw.VertexID].BoneWeights.Add(new BoneWeight(boneIndex, vw.Weight));
}
}
}
var geometry = builder.GetGeometry();
geometry.SimplifyVertices();
return(geometry);
}
