public ObjFileMtlImporter(TextReader reader, string absPath, Model model)
{
this.Reader = reader;
this.Model = model;
this.Line = 0;
if (model.DefaultMaterial == null)
{
Model.DefaultMaterial = new Material();
model.DefaultMaterial.MaterialName = "default";
}
Load();
}
public ObjFileParser(TextReader reader, string modelName, string dirPath)
{
Reader = reader;
DirPath = dirPath;
// Create the model instance to store all the data
Model = new Model();
Model.ModelName = modelName;
// create default material and store it
Model.DefaultMaterial = new Material();
Model.DefaultMaterial.MaterialName = DEFAULT_MATERIAL;
Model.MaterialLib.Add(DEFAULT_MATERIAL);
Model.MaterialMap[DEFAULT_MATERIAL] = Model.DefaultMaterial;
// Start parsing the file
parseFile();
}
void CreateVertexArray(Model model, Object currentObject, int meshIndex, AssimpSharp.Mesh mesh, int numIndices)
{
Debug.Assert(null != currentObject);
if (currentObject.Meshes.Count == 0)
{
return;
}
var objMesh = model.Meshes[meshIndex];
if (null == objMesh || objMesh.NumIndices < 1)
{
return;
}
mesh.NumVertices = numIndices;
if (mesh.NumVertices == 0)
{
throw (new DeadlyImportError("OBJ: no vertices"));
}
else if (mesh.NumVertices > int.MaxValue)
{
throw (new DeadlyImportError("OBJ: Too many vertices, would run out of memory"));
}
mesh.Vertices = new Vector3[mesh.NumVertices];
if (model.Normals.Count != 0 && objMesh.HasNormals)
{
mesh.Normals = new Vector3[mesh.NumVertices];
}
if (model.TextureCoord.Count > 0 && objMesh.UVCoordinates[0] > 0)
{
mesh.NumUVComponents[0] = 2;
mesh.TextureCoords[0] = new Vector3[mesh.NumVertices];
}
int newIndex = 0;
int outIndex = 0;
for (int index = 0; index < objMesh.Faces.Count; index++)
{
var sourceFace = objMesh.Faces[index];
for (int vertexIndex = 0, outVertexIndex = 0; vertexIndex < sourceFace.Vertices.Count; vertexIndex++)
{
int vertex = (int)sourceFace.Vertices[vertexIndex];
if (vertexIndex >= model.Vertices.Count)
{
throw (new DeadlyImportError("OBJ: vertex index out of range"));
}
mesh.Vertices[newIndex] = model.Vertices[vertex];
}
}
}
AssimpSharp.Mesh CreateTopology(Model model, Object data, int meshIndex)
{
var objMesh = model.Meshes[meshIndex];
if (objMesh == null)
{
return null;
}
var mesh = new AssimpSharp.Mesh();
if (!string.IsNullOrEmpty(objMesh.Name))
{
mesh.Name = objMesh.Name;
}
for (int index = 0; index < objMesh.Faces.Count; index++)
{
var inp = objMesh.Faces[index];
if (inp.PrimitiveType == PrimitiveType.Line)
{
mesh.NumFaces += inp.Vertices.Count;
mesh.PrimitiveTypes |= AssimpSharp.PrimitiveType.Line;
}
else if (inp.PrimitiveType == PrimitiveType.Point)
{
mesh.NumFaces += inp.Vertices.Count;
mesh.PrimitiveTypes |= AssimpSharp.PrimitiveType.Point;
}
else
{
mesh.NumFaces++;
if (inp.Vertices.Count > 3)
{
mesh.PrimitiveTypes |= AssimpSharp.PrimitiveType.Polygon;
}
else
{
mesh.PrimitiveTypes |= AssimpSharp.PrimitiveType.Triangle;
}
}
}
int indexCount = 0;
if (mesh.NumFaces > 0)
{
mesh.Faces = new AssimpSharp.Face[mesh.NumFaces];
if (objMesh.MaterialIndex != Mesh.NoMaterial)
{
mesh.MaterialIndex = (int)objMesh.MaterialIndex;
}
int outIndex = 0;
// Copy all data from all stored meshes
for (int index = 0; index < objMesh.Faces.Count; index++)
{
var inp = objMesh.Faces[index];
if (inp.PrimitiveType == PrimitiveType.Line)
{
for (int i = 0; i < inp.Vertices.Count - 1; i++)
{
var f = mesh.Faces[outIndex++];
indexCount += 2;
f.Indices = new int[2];
}
continue;
}
else if (inp.PrimitiveType == PrimitiveType.Point)
{
for (int i = 0; i < inp.Vertices.Count; i++)
{
var f = mesh.Faces[outIndex++];
indexCount += 1;
f.Indices = new int[1];
}
continue;
}
var face = mesh.Faces[outIndex++];
var numIndices = objMesh.Faces[index].Vertices.Count;
indexCount += numIndices;
if (face.Indices.Length > 0)
{
face.Indices = new int[numIndices];
}
}
}
// Create mesh vertices
CreateVertexArray(model, data, meshIndex, mesh, indexCount);
return mesh;
}
Node CreateNodes(Model model, Object data, Node parent, Scene scene, List<AssimpSharp.Mesh> meshArray)
{
Debug.Assert(null != model);
if (null == data)
{
return null;
}
var olsMeshSize = meshArray.Count;
var node = new AssimpSharp.Node();
node.Name = data.ObjName;
if (parent != null)
{
AppendChildToParentNode(parent, node);
}
foreach (var meshId in data.Meshes)
{
var mesh = CreateTopology(model, data, (int)meshId);
if (mesh != null && mesh.NumFaces > 0)
{
meshArray.Add(mesh);
}
}
if (data.SubObjects.Count > 0)
{
var numChilds = data.SubObjects.Count;
}
var meshSizeDiff = meshArray.Count - olsMeshSize;
if (meshSizeDiff > 0)
{
int index = 0;
for (int i = olsMeshSize; i < meshArray.Count; i++)
{
throw (new NotImplementedException());
}
}
return node;
}
/// <summary>
/// Creates the material
/// </summary>
void CreateMaterilas(Model model, Scene scene)
{
Debug.Assert(null != scene);
{
return;
}
int numMaterials = model.MaterialLib.Count;
scene.Materials.Clear();
if (model.MaterialLib.Count == 0)
{
Debug.WriteLine("OBJ: no materials specified");
return;
}
for (int matIndex = 0; matIndex < numMaterials; matIndex++)
{
// Store material name
// No material found, use the default material
Material currentMaterial;
if (!model.MaterialMap.TryGetValue(model.MaterialLib[matIndex], out currentMaterial))
{
continue;
}
var mat = new AssimpSharp.Material();
mat.Name = currentMaterial.MaterialName;
// convert illumination model
ShadingMode sm = 0;
switch (currentMaterial.IlluminationModel)
{
case 0:
sm = ShadingMode.NoShading;
break;
case 1:
sm = ShadingMode.Gouraud;
break;
case 2:
sm = ShadingMode.Phong;
break;
default:
sm = ShadingMode.Gouraud;
Debug.WriteLine("OBJ: unexpected illumination model (0-2 recognized)");
break;
}
mat.ShadingMode = sm;
// multiplying the specular exponent with 2 seems to yield better results
currentMaterial.Shineness *= 4f;
// Adding material colors
mat.ColorAmbient = new Color4(currentMaterial.Ambient);
mat.ColorDiffuse = new Color4(currentMaterial.Diffuse);
mat.ColorSpecular = new Color4(currentMaterial.Specular);
mat.ColorEmissive = new Color4(currentMaterial.Emissive);
mat.Shininess = currentMaterial.Shineness;
mat.Opacity = currentMaterial.Alpha;
// Adding refraction index
mat.Reflectivity = currentMaterial.IOR;
// Adding textures
if (!string.IsNullOrEmpty(currentMaterial.Texture))
{
mat.TextureDiffuse = new TextureSlot()
{
TextureBase = currentMaterial.Texture
};
if (currentMaterial.Clamp[(int)Material.TextureType.DiffuseType])
{
AddTextureMappingModeProperty(mat, TextureType.Diffuse);
}
}
if (!string.IsNullOrEmpty(currentMaterial.TextureAmbient))
{
mat.TextureAmbient = new TextureSlot()
{
TextureBase = currentMaterial.TextureAmbient
};
if (currentMaterial.Clamp[(int)Material.TextureType.AmbientType])
{
AddTextureMappingModeProperty(mat, TextureType.Ambient);
}
}
if (!string.IsNullOrEmpty(currentMaterial.TextureEmissive))
{
mat.TextureAmbient = new TextureSlot()
{
TextureBase = currentMaterial.TextureEmissive
};
}
if (!string.IsNullOrEmpty(currentMaterial.TextureSpecular))
{
mat.TextureSpecular = new TextureSlot()
{
TextureBase = currentMaterial.TextureSpecular
};
if (currentMaterial.Clamp[(int)Material.TextureType.SpecularType])
{
AddTextureMappingModeProperty(mat, TextureType.Specular);
}
}
if (!string.IsNullOrEmpty(currentMaterial.TextureBump))
{
mat.TextureHeight = new TextureSlot()
{
TextureBase = currentMaterial.TextureBump
};
if (currentMaterial.Clamp[(int)Material.TextureType.BumpType])
{
AddTextureMappingModeProperty(mat, TextureType.Height);
}
}
if (!string.IsNullOrEmpty(currentMaterial.TextureNormal))
{
mat.TextureNormals = new TextureSlot()
{
TextureBase = currentMaterial.TextureNormal
};
if (currentMaterial.Clamp[(int)Material.TextureType.NormalType])
{
AddTextureMappingModeProperty(mat, TextureType.Normals);
}
}
if (!string.IsNullOrEmpty(currentMaterial.TextureDisp))
{
mat.TextureDisplacement = new TextureSlot()
{
TextureBase = currentMaterial.TextureDisp
};
if (currentMaterial.Clamp[(int)Material.TextureType.DispType])
{
AddTextureMappingModeProperty(mat, TextureType.Displacement);
}
}
if (!string.IsNullOrEmpty(currentMaterial.TextureOpacity))
{
mat.TextureOpacity = new TextureSlot()
{
TextureBase = currentMaterial.TextureOpacity
};
if (currentMaterial.Clamp[(int)Material.TextureType.OpacityType])
{
AddTextureMappingModeProperty(mat, TextureType.Opacity);
}
}
if (!string.IsNullOrEmpty(currentMaterial.TextureSpecularity))
{
mat.TextureShininess = new TextureSlot()
{
TextureBase = currentMaterial.TextureSpecularity
};
if (currentMaterial.Clamp[(int)Material.TextureType.SpecularityType])
{
AddTextureMappingModeProperty(mat, TextureType.Shininess);
}
}
// Store material property info in material array in scene
scene.Materials.Add(mat);
}
// Test number of created materials.
Debug.Assert(scene.Materials.Count == numMaterials);
}
void CreateDataFromImport(Model model, Scene scene)
{
if (null == model)
{
return;
}
scene.RootNode = new Node();
if (string.IsNullOrEmpty(model.ModelName))
{
scene.RootNode.Name = model.ModelName;
}
else
{
Debug.Assert(false);
}
var meshArray = new List<AssimpSharp.Mesh>();
for (int index = 0; index < model.Objects.Count; index++)
{
CreateNodes(model, model.Objects[index], scene.RootNode, scene, meshArray);
}
if (scene.Meshes.Count > 0)
{
scene.Meshes.AddRange(meshArray);
}
CreateMaterilas(model, scene);
}