private static void AssignMaterialsToMeshBatchesRecursive(J3D.J3D file, Obj.MaterialLibrary matLibrary, IList <Obj.Object> objObjects, HierarchyNode curNode, ref Obj.ObjMaterial curMaterial)
{
/*switch (curNode.Type)
* {
* case HierarchyDataType.Material: curMaterial = matLibrary.Materials[file.MAT3Tag.MaterialRemapTable[curNode.Value]]; break;
* case HierarchyDataType.Batch:
* Obj.Object obj = objObjects[file.SHP1Tag.ShapeRemapTable[curNode.Value]];
* obj.Material = curMaterial;
* break;
* }
*
* foreach (var child in curNode.Children)
* AssignMaterialsToMeshBatchesRecursive(file, matLibrary, objObjects, child, ref curMaterial);*/
}
public static void Export(J3D.J3D file, string toFilePath)
{
Obj outputObj = new Obj();
List <Obj.Object> objObjects = new List <Obj.Object>();
foreach (var shape in file.SHP1Tag.Shapes)
{
// We can read the Position/UV/Normal data off of the shapes here, but we don't know which
// material they belong to yet unless we iterate through the J3D's scene graph.
Obj.Object objShape = new Obj.Object();
objShape.Positions.AddRange(shape.VertexData.Position);
objShape.Normals.AddRange(shape.VertexData.Normal);
objShape.TexCoords.AddRange(shape.VertexData.Tex0);
for (int i = 0; i < shape.VertexData.Color0.Count; i++)
{
WLinearColor col = shape.VertexData.Color0[i];
objShape.Colors.Add(new Vector4(col.R, col.G, col.B, col.A));
}
objShape.BuildFacesFromData();
objObjects.Add(objShape);
}
// Create a material for each material in the J3D file.
Obj.MaterialLibrary objMaterialLibrary = new Obj.MaterialLibrary(file.Name);
foreach (var mat in file.MAT3Tag.MaterialList)
{
Obj.ObjMaterial objMaterial = new Obj.ObjMaterial(mat.Name);
// Because of the complexity of TEV Materials and their multi-inputs, we don't assign
// anything to the Ambient/Diffuse/Specular colors of the material. Instead we leave them
// at their defaults and just assign a Diffuse texture since it is also the only one we can
// reliably determine from a TEV material. We also are forced to use the first TextureIndex,
// even though there can be up to 8.
int textureIndex = mat.TextureIndexes[0];
if (textureIndex < 0)
{
continue;
}
Texture texture = file.TEX1Tag.Textures[textureIndex];
var textureBitmap = texture.CompressedData.CreateBitmap();
objMaterial.AmbientTexture = objMaterial.DiffuseTexture = textureBitmap;
// Add it to our Obj Material Library
objMaterialLibrary.Materials.Add(objMaterial);
}
// Now we have to do a custom iteration through the SceneGraph of the J3D file to assign Materials to Objects.
Obj.ObjMaterial dummyMat = null;
AssignMaterialsToMeshBatchesRecursive(file, objMaterialLibrary, objObjects, file.INF1Tag.HierarchyRoot, ref dummyMat);
// Write the created OBJ file out to disk.
// Free the bitmaps we allocated as part of creating the materials.
foreach (var mat in objMaterialLibrary.Materials)
{
mat.AmbientTexture.Dispose();
}
}
