public static GeometryBuilder ToGeometryBuilder(this Va3cGeometry g)
{
var gb = new GeometryBuilder();
var vertices = g.data.vertices.ToIArray()
.SelectTriplets(ToVertex);
// https://github.com/mrdoob/three.js/wiki/JSON-Model-format-3
// https://github.com/mrdoob/three.js/wiki/JSON-Object-Scene-format-4
// https://stackoverflow.com/questions/35386518/parsing-three-js-json-mesh-format-normals-errors
// https://stackoverflow.com/questions/28023734/threejs-json-loader-mixed-faces-and-vertices
var f = 0;
var obscure = removeFourthValue(g.data.faces.ToArray());
while (f < obscure.Length)
{
//var bits = g.data.faces[f++];
//var isTriangle = (bits & 1) == 0;
//var isQuad = (bits & 1) != 0;
//var hasMaterial = (bits & 2) != 0;
//var hasUV = (bits & 4) != 0;
//var hasVertexUv = (bits & 8) != 0;
//var hasNormal = (bits & 16) != 0;
//var hasVertexNormal = (bits & 32) != 0;
//var hasColor = (bits & 64) != 0;
//var hasVertexColor = (bits & 128) != 0;
//Debug.Assert(bits == 0);
for (var i = 0; i < 3; ++i)
{
gb.Indices.Add(obscure[f++]);
}
}
gb.Vertices.AddRange(vertices.ToArray());
gb.UVs.AddRange(Vector2.Zero.Repeat(vertices.Count).ToArray());
var nfaces = gb.Indices.Count / 3;
for (var i = 0; i < nfaces; ++i)
{
gb.MaterialIds.Add(-1);
gb.FaceGroupIds.Add(-1);
}
return(gb);
}
public static Va3cGeometry ToGeometry(IMesh m, int index)
{
var r = new Va3cGeometry();
r.uuid = index.ToString();
for (var i = 0; i < m.NumFaces; ++i)
{
r.data.faces.Add(0);
for (var j = 0; j < 3; ++j)
{
r.data.faces.Add(m.Indices[i * 3 + j]);
}
}
for (var i = 0; i < m.NumVertices; ++i)
{
var v = m.Vertices[i];
r.data.vertices.Add(v.X * Constants.FeetToMm);
r.data.vertices.Add(v.Y * Constants.FeetToMm);
r.data.vertices.Add(v.Z * Constants.FeetToMm);
}
return(r);
}