unsafe IOReadResult BuildMeshes_Simple(ReadOptions options, IMeshBuilder builder)
{
if (vPositions.Length == 0)
{
return(new IOReadResult(IOCode.GarbageDataError, "No vertices in file"));
}
if (vTriangles.Length == 0)
{
return(new IOReadResult(IOCode.GarbageDataError, "No triangles in file"));
}
// [TODO] support non-per-vertex normals/colors
bool bHaveNormals = (vNormals.Length == vPositions.Length);
bool bHaveColors = (vColors.Length == vPositions.Length);
bool bHaveUVs = (vUVs.Length / 2 == vPositions.Length / 3);
int nVertices = vPositions.Length / 3;
int[] mapV = new int[nVertices];
int meshID = builder.AppendNewMesh(bHaveNormals, bHaveColors, bHaveUVs, false);
for (int k = 0; k < nVertices; ++k)
{
vtx_key vk = new vtx_key()
{
vi = k, ci = k, ni = k, ui = k
};
mapV[k] = append_vertex(builder, vk, bHaveNormals, bHaveColors, bHaveUVs);
}
// [TODO] this doesn't handle missing vertices...
for (int k = 0; k < vTriangles.Length; ++k)
{
append_triangle(builder, k, mapV);
}
if (UsedMaterials.Count == 1) // [RMS] should not be in here otherwise
{
int material_id = UsedMaterials.Keys.First();
string sMatName = UsedMaterials[material_id];
OBJMaterial useMat = Materials[sMatName];
int matID = builder.BuildMaterial(useMat);
builder.AssignMaterial(matID, meshID);
}
return(new IOReadResult(IOCode.Ok, ""));
}
IOReadResult BuildMeshes_ByMaterial(ReadOptions options, IMeshBuilder builder)
{
if (vPositions.Length == 0)
{
return(new IOReadResult(IOCode.GarbageDataError, "No vertices in file"));
}
if (vTriangles.Length == 0)
{
return(new IOReadResult(IOCode.GarbageDataError, "No triangles in file"));
}
bool bHaveNormals = (vNormals.Length > 0);
bool bHaveColors = (vColors.Length > 0);
bool bHaveUVs = (vUVs.Length > 0);
var usedMaterialIDs = new List <int>(UsedMaterials.Keys);
usedMaterialIDs.Add(Triangle.InvalidMaterialID);
foreach (int material_id in usedMaterialIDs)
{
int matID = Triangle.InvalidMaterialID;
if (material_id != Triangle.InvalidMaterialID)
{
string sMatName = UsedMaterials[material_id];
OBJMaterial useMat = Materials[sMatName];
matID = builder.BuildMaterial(useMat);
}
bool bMatHaveUVs = (material_id == Triangle.InvalidMaterialID) ? false : bHaveUVs;
// don't append mesh until we actually see triangles
int meshID = -1;
var mapV = new Dictionary <Index3i, int>();
for (int k = 0; k < vTriangles.Length; ++k)
{
Triangle t = vTriangles[k];
if (t.nMaterialID == material_id)
{
if (meshID == -1)
{
meshID = builder.AppendNewMesh(bHaveNormals, bHaveColors, bMatHaveUVs, false);
}
var t2 = new Triangle();
for (int j = 0; j < 3; ++j)
{
var vk = new Index3i(
t.vIndices[j] - 1, t.vNormals[j] - 1, t.vUVs[j] - 1);
int use_vtx = -1;
if (mapV.ContainsKey(vk) == false)
{
use_vtx = append_vertex(builder, vk, bHaveNormals, bHaveColors, bMatHaveUVs);
mapV[vk] = use_vtx;
}
else
{
use_vtx = mapV[vk];
}
t2.vIndices[j] = use_vtx;
}
append_triangle(builder, t2);
}
}
if (matID != Triangle.InvalidMaterialID)
{
builder.AssignMaterial(matID, meshID);
}
}
return(new IOReadResult(IOCode.Ok, ""));
}