public static PlotlyScene ToPlotly(this Schema2.Mesh mesh)
{
var dstScene = new PlotlyScene();
dstScene.AppendTriangles(mesh.EvaluateTriangles(), GetMaterialColor);
return(dstScene);
}
private static IEnumerable <SRCPRIM> _GetValidPrimitives(SRCMESH srcMesh)
{
foreach (var srcPrim in srcMesh.Primitives)
{
var ppp = srcPrim.GetVertexAccessor("POSITION");
if (ppp.Count < 3)
{
continue;
}
if (srcPrim.DrawPrimitiveType == Schema2.PrimitiveType.POINTS)
{
continue;
}
if (srcPrim.DrawPrimitiveType == Schema2.PrimitiveType.LINES)
{
continue;
}
if (srcPrim.DrawPrimitiveType == Schema2.PrimitiveType.LINE_LOOP)
{
continue;
}
if (srcPrim.DrawPrimitiveType == Schema2.PrimitiveType.LINE_STRIP)
{
continue;
}
yield return(srcPrim);
}
}
internal void _WriteMesh(SRCMESH srcMesh)
{
if (_Device == null)
{
throw new InvalidOperationException();
}
var srcPrims = _GetValidPrimitives(srcMesh)
.ToDictionary(item => item, item => new MeshPrimitiveReader(item, item.Material?.DoubleSided ?? false));
VertexNormalsFactory.CalculateSmoothNormals(srcPrims.Values.ToList());
VertexTangentsFactory.CalculateTangents(srcPrims.Values.ToList());
foreach (var srcPrim in srcPrims)
{
_CurrentMeshIndex = srcMesh.LogicalIndex;
_WriteMeshPrimitive(srcPrim.Value, srcPrim.Key.Material);
}
}
public static MeshData FromGltfMesh(GLTF.Mesh mesh)
{
var vcount = mesh.Primitives.Select(prim => prim.VertexAccessors["POSITION"].Count).Sum();
if (vcount >= ushort.MaxValue)
{
throw new Exception($"Too many vertices ({vcount}) in mesh {mesh.Name}. Limit is 65535");
}
var attribsUsed = mesh.Primitives.First().VertexAccessors.Select(i => i.Key).OrderBy(i => i);
var ok = mesh.Primitives.Select(i => i.VertexAccessors.Keys.OrderBy(j => j)).Aggregate(true, (acc, curr) => acc && curr.SequenceEqual(attribsUsed));
if (!ok)
{
throw new Exception("Vertex attributes not consistent between Primitives. Diesel cannot represent this.");
}
var ms = new MeshData();
ms.materials = mesh.Primitives.Select(i => i.Material?.Name ?? "Material: Default Material").Distinct().ToList();
uint currentBaseVertex = 0;
uint currentBaseIndex = 0;
foreach (var prim in mesh.Primitives)
{
var vertices = GetVerticesFromPrimitive(prim).ToList();
var primFaces = prim.GetTriangleIndices().ToList();
var matname = prim.Material?.Name ?? "Material: Default Material";
var ra = new DM.RenderAtom
{
BaseIndex = currentBaseIndex,
BaseVertex = currentBaseVertex,
MaterialId = (uint)ms.materials.IndexOf(matname),
TriangleCount = (uint)primFaces.Count
};
var vertexIds = new Dictionary <Vertex, int>();
foreach (var(A, B, C) in primFaces)
{
var vtxA = vertices[A];
var vtxB = vertices[B];
var vtxC = vertices[C];
if (!vertexIds.ContainsKey(vtxA))
{
vertexIds[vtxA] = ms.AppendVertex(vtxA);
}
if (!vertexIds.ContainsKey(vtxB))
{
vertexIds[vtxB] = ms.AppendVertex(vtxB);
}
if (!vertexIds.ContainsKey(vtxC))
{
vertexIds[vtxC] = ms.AppendVertex(vtxC);
}
var df = new DM.Face(
(ushort)vertexIds[vtxA],
(ushort)vertexIds[vtxB],
(ushort)vertexIds[vtxC]
);
ms.faces.Add(df);
}
ra.GeometrySliceLength = (uint)vertexIds.Count;
ms.renderAtoms.Add(ra);
currentBaseIndex += ra.TriangleCount * 3;
currentBaseVertex += ra.GeometrySliceLength;
}
return(ms);
}
