/// <summary>
///
/// </summary>
/// <returns></returns>
private string GenerateGeometry(IOMesh mesh)
{
// convert mesh to triangles to simplify
mesh.MakeTriangles();
// create a unique geometry id
var geomID = GetUniqueID(mesh.Name + "-geometry");
// create geometry element
Geometry geom = new Geometry()
{
ID = geomID,
Name = mesh.Name
};
geom.Mesh = new Mesh();
// generate sources
SourceGenerator srcgen = new SourceGenerator();
srcgen.AddSourceData(
geomID, Input_Semantic.POSITION,
mesh.Vertices.SelectMany(e => new float[] { e.Position.X, e.Position.Y, e.Position.Z }).ToArray());
srcgen.AddSourceData(
geomID, Input_Semantic.NORMAL,
mesh.Vertices.SelectMany(e => new float[] { e.Normal.X, e.Normal.Y, e.Normal.Z }).ToArray());
for (int i = 0; i < 7; i++)
{
if (mesh.HasUVSet(i))
{
srcgen.AddSourceData(
geomID, Input_Semantic.TEXCOORD,
mesh.Vertices.SelectMany(e => new float[] { e.UVs[i].X, e.UVs[i].Y }).ToArray(),
i);
}
}
for (int i = 0; i < 7; i++)
{
if (mesh.HasColorSet(i))
{
srcgen.AddSourceData(
geomID, Input_Semantic.COLOR,
mesh.Vertices.SelectMany(e => new float[] { e.Colors[i].X, e.Colors[i].Y, e.Colors[i].Z, e.Colors[i].W }).ToArray(),
i);
}
}
// fill in vertex info
geom.Mesh.Vertices = new Vertices()
{
ID = GetUniqueID(mesh.Name + "-vertices"),
Input = new Input_Unshared[] {
new Input_Unshared()
{
Semantic = IONET.Collada.Enums.Input_Semantic.POSITION,
source = "#" + srcgen.GetID(Input_Semantic.POSITION)
}
}
};
// fill in triangles
var polyIndex = 0;
geom.Mesh.Triangles = new Triangles[mesh.Polygons.Count];
foreach (var poly in mesh.Polygons)
{
if (poly.PrimitiveType != IOPrimitive.TRIANGLE)
{
System.Diagnostics.Debug.WriteLine("Warning: " + poly.PrimitiveType + " not currently supported");
continue;
}
Triangles tri = new Triangles()
{
Count = poly.Indicies.Count / 3,
Material = poly.MaterialName
};
List <Input_Shared> inputs = new List <Input_Shared>();
inputs.Add(new Input_Shared()
{
Semantic = Input_Semantic.VERTEX,
Offset = inputs.Count,
source = "#" + geom.Mesh.Vertices.ID
});
inputs.Add(new Input_Shared()
{
Semantic = Input_Semantic.NORMAL,
Offset = inputs.Count,
source = "#" + srcgen.GetID(Input_Semantic.NORMAL)
});
for (int i = 0; i < 7; i++)
{
if (mesh.HasUVSet(i))
{
inputs.Add(new Input_Shared()
{
Semantic = Input_Semantic.TEXCOORD,
source = "#" + srcgen.GetID(Input_Semantic.TEXCOORD, i),
Offset = inputs.Count,
Set = i
});
}
}
for (int i = 0; i < 7; i++)
{
if (mesh.HasColorSet(i))
{
inputs.Add(new Input_Shared()
{
Semantic = Input_Semantic.COLOR,
source = "#" + srcgen.GetID(Input_Semantic.COLOR, i),
Offset = inputs.Count,
Set = i
});
}
}
tri.Input = inputs.ToArray();
tri.P = new IONET.Collada.Types.Int_Array_String()
{
Value_As_String = string.Join(" ", srcgen.Remap(poly.Indicies))
};
geom.Mesh.Triangles[polyIndex++] = tri;
}
// generate sources
geom.Mesh.Source = srcgen.GetSources();
// add geometry element to document
if (_collada.Library_Geometries == null)
{
_collada.Library_Geometries = new Library_Geometries();
}
if (_collada.Library_Geometries.Geometry == null)
{
_collada.Library_Geometries.Geometry = new Geometry[0];
}
Array.Resize(ref _collada.Library_Geometries.Geometry, _collada.Library_Geometries.Geometry.Length + 1);
_collada.Library_Geometries.Geometry[_collada.Library_Geometries.Geometry.Length - 1] = geom;
// return geometry id
return(geomID);
}