/// <summary>
/// Rename every material from the obj and mtl to make them unique after the merge
/// </summary>
/// <param name="objData"></param>
/// <param name="mtlData"></param>
/// <param name="indexMaterial"></param>
private static void SetUniqueMaterialsNames(ObjData objData, MtlData mtlData, IntWrapper indexMaterial)
{
// Dictionary that associate every material to a list of groups
Dictionary <string, List <int> > dictMaterialGroups = ObjUtils.GetDictMaterialGroups(objData);
if (mtlData == null) // Need to rename the Materials in obj only
{
foreach (KeyValuePair <string, List <int> > keyValue in dictMaterialGroups)
{
SetUniqueMaterialsName(objData, keyValue.Value, indexMaterial);
indexMaterial.Value++;
}
}
else // Need to rename the Materials in both obj and mtl
{
// Dictionary that associate every material of the mtl file to their index
Dictionary <string, int> dictMaterialIndex = MtlUtils.GetDictMaterialIndex(mtlData);
foreach (KeyValuePair <string, List <int> > keyValue in dictMaterialGroups)
{
SetUniqueMaterialsName(objData, keyValue.Value, indexMaterial);
if (dictMaterialIndex.TryGetValue(keyValue.Key, out int index)) // We get the index of the material
{
MaterialMtl materialMtl = mtlData.MaterialsList[index];
if (materialMtl.NewMtl != null)
{
materialMtl.NewMtl = GenericUtils.MergeIndexStr(indexMaterial.Value, materialMtl.NewMtl);
}
}
indexMaterial.Value++;
}
}
}
/// <summary>
/// Delete every unused material the obj file
/// </summary>
/// <param name="objData">Data parsed from the obj file</param>
/// <param name="mtlData">Data parsed from the mtl file</param>
public static bool DeleteUnusedMaterials(ObjData objData, MtlData mtlData)
{
if (mtlData == null)
{
return(false);
}
// Dictionary that associate every material to a list of groups
Dictionary <string, List <int> > dictMaterialGroups = ObjUtils.GetDictMaterialGroups(objData);
// Dictionary that associate every material of the mtl file to their index
Dictionary <string, int> dictMaterialIndex = MtlUtils.GetDictMaterialIndex(mtlData);
List <MaterialMtl> newMaterialsList = new List <MaterialMtl>();
foreach (KeyValuePair <string, List <int> > keyValue in dictMaterialGroups)
{
if (dictMaterialIndex.TryGetValue(keyValue.Key, out int index)) // We get the index of the material
{
MaterialMtl materialMtl = mtlData.MaterialsList[index];
newMaterialsList.Add(materialMtl);
}
}
// Every material that wasnt used in a group was not added to the list
mtlData.MaterialsList = newMaterialsList;
return(true);
}