public static List <Mesh> Denormalize(FileFormatWavefront.Model.Scene scene)
{
var meshes = new List <Mesh>();
var vertics = scene.Vertices;
var normals = scene.Normals;
var uvs = scene.Uvs;
List <Face> facesWithSameIndexCount = new List <Face>();
int currentIndexCount = -1;
// Go through every group and denormalize it.
foreach (var group in scene.Groups)
{
// Go through each face.
for (int i = 0; i < group.Faces.Count; i++)
{
var face = group.Faces[i];
// If this is the first face, set the current index count.
if (currentIndexCount == -1)
{
currentIndexCount = face.Indices.Count;
}
else if (currentIndexCount == face.Indices.Count)
{
facesWithSameIndexCount.Add(face);
}
// If this is a new index count, or the end, complete the mesh.
if (currentIndexCount != face.Indices.Count || i == group.Faces.Count - 1)
{
var indices = facesWithSameIndexCount.SelectMany(f => f.Indices).ToList();
// Create the mesh vertices.
var vs = indices.Select(ind => vertics[ind.vertex]).Select(v => new vec3(v.x, v.y, v.z)).ToArray();
var ns = indices.Any(ind => ind.normal.HasValue == false)
? null
: indices.Select(ind => normals[ind.normal.Value]).Select(
v => new vec3(v.x, v.y, v.z)).ToArray();
var ts = indices.Any(ind => ind.uv.HasValue == false)
? null
: indices.Select(ind => uvs[ind.uv.Value]).Select(v => new vec2(v.u, v.v)).ToArray();
meshes.Add(new Mesh
{
vertices = vs,
normals = ns,
uvs = ts,
material = facesWithSameIndexCount.First().Material,
indicesPerFace = currentIndexCount
});
facesWithSameIndexCount = new List <Face>();
facesWithSameIndexCount.Add(face);
currentIndexCount = face.Indices.Count;
}
}
}
return(meshes);
}
private void PopulateModelTreeView(Scene scene)
{
// Populate the model tree view.
treeViewModel.Nodes.Clear();
// Add the vertices, normals and uvs.
treeViewModel.Nodes.Add(new TreeNode
{
Text = "Vertices",
Tag = scene.Vertices
});
treeViewModel.Nodes.Add(new TreeNode
{
Text = "UVs",
Tag = scene.Uvs
});
treeViewModel.Nodes.Add(new TreeNode
{
Text = "Normals",
Tag = scene.Normals
});
treeViewModel.Nodes.Add(new TreeNode
{
Text = "Ungrouped Faces",
Tag = scene.UngroupedFaces
});
// Add the groups.
var treeNodeGroups = new TreeNode
{
Text = "Groups",
Tag = scene.Groups
};
foreach (var group in scene.Groups)
{
var treeNodeGroup = new TreeNode
{
Text = group.Names.Any() ? string.Join(" ", group.Names) : "<unnamed>",
Tag = group
};
treeNodeGroup.Nodes.Add(new TreeNode
{
Text = "Faces",
Tag = group.Faces
});
treeNodeGroups.Nodes.Add(treeNodeGroup);
}
treeViewModel.Nodes.Add(treeNodeGroups);
// Add the materials.
var treeNodeMaterials = new TreeNode
{
Text = "Materials",
Tag = scene.Materials
};
foreach (var material in scene.Materials)
{
treeNodeMaterials.Nodes.Add(new TreeNode
{
Text = !string.IsNullOrEmpty(material.Name) ? material.Name : "<unnamed>",
Tag = material
});
}
treeViewModel.Nodes.Add(treeNodeMaterials);
}