private static IMeshBuilder <MaterialBuilder> ConvertMesh(PssgNode mpjnNode, ExportState state)
{
IEnumerable <PssgNode> primitives = mpjnNode.FindNodes("MATRIXPALETTERENDERINSTANCE"); // RD: Grid
primitives = primitives.Concat(mpjnNode.FindNodes("MATRIXPALETTEJOINTRENDERINSTANCE")); // Dirt 2 and beyond
var primitiveDatas = new List <PrimitiveData>();
var texCoordSets = 0;
foreach (var prim in primitives)
{
var shaderName = ((string)prim.Attributes["shader"].Value).Substring(1);
var material = CreateMaterialBuilder(shaderName, state, out var createdNew);
string rdsId = ((string)prim.Attributes["indices"].Value).Substring(1);
var rdsNode = prim.File.FindNodes("RENDERDATASOURCE", "id", rdsId).First();
var rds = new RenderDataSourceReader(rdsNode);
texCoordSets = Math.Max(texCoordSets, rds.TexCoordSetCount);
primitiveDatas.Add(new PrimitiveData(prim, material, createdNew, rds));
}
string name = (string)mpjnNode.Attributes["id"].Value;
var mb = CreateMeshBuilder(name, texCoordSets);
foreach (var prim in primitiveDatas)
{
if (prim.CreatedNewMaterial)
{
ConvertMaterial(prim.Node.File, prim.Material, prim.Rds.TexCoordSetCount);
}
var pb = mb.UsePrimitive(prim.Material);
var rds = prim.Rds;
var indexOffset = prim.Node.Attributes["indexOffset"].GetValue <uint>();
var indexCount = prim.Node.Attributes["indicesCountFromOffset"].GetValue <uint>();
var triangles = rds.GetTriangles((int)indexOffset, (int)indexCount);
foreach (var tri in triangles)
{
pb.AddTriangle(
CreateVertexBuilder(rds, tri.A, state),
CreateVertexBuilder(rds, tri.B, state),
CreateVertexBuilder(rds, tri.C, state));
}
}
return(mb);
}
protected record PrimitiveData(PssgNode Node, MaterialBuilder Material, bool CreatedNewMaterial, RenderDataSourceReader Rds);
