private void BuildFromFaces()
{
for (int i = 0; i < obj.FaceList.Count; i++)
{
ObjParser.Types.Face face = obj.FaceList[i];
if (face.VertexIndexList.Length == 3) // triangle face
{
triangles.Add(VertexIndexFromFaceElement(face, 0));
triangles.Add(VertexIndexFromFaceElement(face, 1));
triangles.Add(VertexIndexFromFaceElement(face, 2));
materialNames.Add(face.UseMtl);
}
if (face.VertexIndexList.Length == 4) // quad face
{
triangles.Add(VertexIndexFromFaceElement(face, 0));
triangles.Add(VertexIndexFromFaceElement(face, 1));
triangles.Add(VertexIndexFromFaceElement(face, 2));
materialNames.Add(face.UseMtl);
triangles.Add(VertexIndexFromFaceElement(face, 0));
triangles.Add(VertexIndexFromFaceElement(face, 2));
triangles.Add(VertexIndexFromFaceElement(face, 3));
materialNames.Add(face.UseMtl);
}
}
}
private List <ObjParser.Types.Face> ObjFacesOfListInt(int[] triangles)
{
List <ObjParser.Types.Face> faceList = new List <ObjParser.Types.Face>();
for (int i = 0; i < triangles.Length; i += 3)
{
ObjParser.Types.Face newFace = new ObjParser.Types.Face();
newFace.UseMtl = EscapeMaterialName(materialNames[i / 3]);
newFace.VertexIndexList = new int[] {
triangles[i] + 1,
triangles[i + 1] + 1,
triangles[i + 2] + 1
};
if (uvs != null)
{
newFace.TextureVertexIndexList = newFace.VertexIndexList;
}
else
{
newFace.TextureVertexIndexList = new int[0];
}
faceList.Add(newFace);
}
return(faceList);
}
private int VertexIndexFromFaceElement(ObjParser.Types.Face face, int elementIndex)
{
int faceVertexIndex = face.VertexIndexList[elementIndex];
int faceTextureVertexIndex = face.TextureVertexIndexList[elementIndex];
int vertexIndex;
ObjParser.Types.Vertex vertex = obj.VertexList[faceVertexIndex - 1];
if (faceIndex.ContainsKey(faceVertexIndex, faceTextureVertexIndex))
{
vertexIndex = faceIndex.VertexIndex(faceVertexIndex, faceTextureVertexIndex);
}
else
{
vertices.Add(new Vector3((float)vertex.X, (float)vertex.Y, (float)vertex.Z) + loadObjectOffset);
if (faceTextureVertexIndex != 0)
{
ObjParser.Types.TextureVertex textureVertex = obj.TextureList[faceTextureVertexIndex - 1];
uvs.Add(new Vector2((float)textureVertex.X, (float)textureVertex.Y));
}
vertexIndex = vertices.Count - 1;
faceIndex.Add(faceVertexIndex, faceTextureVertexIndex, vertexIndex);
}
return(vertexIndex);
}
public SyncMesh BuildMesh(Obj curObj)
{
SyncMesh syncmesh = new SyncMesh(new SyncId("MeshId_" + curObj.Name), "Mesh_" + curObj.Name);
// Faceの定義に従う。無駄は多くなる
syncmesh.SubMeshes = new List <SyncSubMesh>();
SyncSubMesh submesh = new SyncSubMesh();
for (int j = 0; j < curObj.FaceList.Count; j++)
{
ObjParser.Types.Face face = curObj.FaceList[j];
for (int i = 0; i < face.VertexIndexList.Length; i++)
{
//idx
int vertexIdx = face.VertexIndexList[i] - 1;
int uvIdx = face.TextureVertexIndexList[i] - 1;
int normalIdx = face.NormalIndexList[i] - 1;
//Console.WriteLine(string.Format("index[{0}] vert[{1}] uv[{2}] normal[{3}]",i, vertexIdx+1, uvIdx+1, normalIdx+1));
//ObjParser.Types.Vertex vertex = curObj.VertexList[vertexIdx];
//ObjParser.Types.TextureVertex uv = curObj.TextureList[uvIdx];
//ObjParser.Types.VertexNormal normal = curObj.VertexNormalList[normalIdx];
ObjParser.Types.Vertex vertex = obj.VertexList[vertexIdx];
ObjParser.Types.TextureVertex uv = obj.TextureList[uvIdx];
ObjParser.Types.VertexNormal normal = obj.VertexNormalList[normalIdx];
//頂点
// OpenGL->DirectX変換のため、Xは反転する
syncmesh.Vertices.Add(new Vector3(vertex.X * -1.0f, vertex.Y, vertex.Z)); // 2021.5.26 X軸を反転
syncmesh.Uvs.Add(new Vector2(uv.X, uv.Y));
syncmesh.Normals.Add(new Vector3(normal.X * -1.0f, normal.Y, normal.Z)); // 2021.5.26 X軸を反転
//syncmesh.Normals.Add(new Vector3(0,0,1));
//Console.WriteLine(string.Format("vert={0}\t{1}\t{2}", (float)vertex.X, (float)vertex.Y, (float)vertex.Z));
//index
//submesh.Triangles.Add(i + j * face.VertexIndexList.Length);
// OpenGL->DirectX変換のため、逆順でセットする
submesh.Triangles.Add((face.VertexIndexList.Length - 1 - i) + j * face.VertexIndexList.Length);
}
}
syncmesh.SubMeshes.Add(submesh);
return(syncmesh);
}
