public static D3ObjectGroup ImportObjectsFromObjFile(string strObjData) {
D3ObjectGroup d3ObjectGroup=new D3ObjectGroup();
string[] lines=strObjData.Split(new string[] {"\r\n"},StringSplitOptions.None);
int i=0;
List<Vertex3f> listV=new List<Vertex3f>();
List<Vertex3f> listT=new List<Vertex3f>();
List<Vertex3f> listN=new List<Vertex3f>();
Vertex3f vertex;
Vertex3f texture;
Vertex3f normal;
VertexNormal vertnorm;
D3Object d3Object=null;
string[] items;
string[] subitems;
int idxV;
int idxT;
int idxN;
Face face;
while(i<lines.Length){
//Debug.WriteLine(i.ToString());
if(lines[i].StartsWith("#")//comment
|| lines[i].StartsWith("mtllib")//material library. We build our own.
|| lines[i].StartsWith("usemtl"))//use material
{
i++;
continue;//we don't care about any of these
}
if(lines[i].StartsWith("o")) {//object. For example "o cube1"
//vertices and normals are per object as they are pulled out of the file,
//but we need to regroup them per d3Object.
i++;
continue;
}
if(lines[i].StartsWith("v ")) {//vertex. For example "v -0.34671119 0.22176000 0.83703486"
items=lines[i].Split(' ');
vertex=new Vertex3f();
vertex.X=Convert.ToSingle(items[1],CultureInfo.InvariantCulture);
vertex.Y=Convert.ToSingle(items[2],CultureInfo.InvariantCulture);
vertex.Z=Convert.ToSingle(items[3],CultureInfo.InvariantCulture);
listV.Add(vertex);
i++;
continue;
}
if(lines[i].StartsWith("vt")) {//vertex. For example "vt 0.72553915 0.63685900"
items=lines[i].Split(' ');
texture=new Vertex3f();
texture.X=Convert.ToSingle(items[1],CultureInfo.InvariantCulture);
texture.Y=Convert.ToSingle(items[2],CultureInfo.InvariantCulture);
//texture.Z=Convert.ToSingle(items[3],CultureInfo.InvariantCulture);
listT.Add(texture);
i++;
continue;
}
if(lines[i].StartsWith("vn")) {//normal. For example "vn -0.32559605 -0.84121753 -0.43167149"
items=lines[i].Split(' ');
normal=new Vertex3f();
normal.X=Convert.ToSingle(items[1],CultureInfo.InvariantCulture);
normal.Y=Convert.ToSingle(items[2],CultureInfo.InvariantCulture);
normal.Z=Convert.ToSingle(items[3],CultureInfo.InvariantCulture);
listN.Add(normal);
i++;
continue;
}
if(lines[i].StartsWith("g")) {//group. For example "g cylinder2_default"
if(d3Object!=null) {
d3ObjectGroup.D3Objects.Add(d3Object);//add the previous object to the group
}
d3Object=new D3Object();//start the new one, including the new list of VNs
d3Object.Name=lines[i].Substring(2);
i++;
continue;
}
if(lines[i].StartsWith("f")) {//face. For example "f 12//384 51//443 384//336 383//335". Format is v//n
items=lines[i].Split(' ');//5 items in this example
//create triangle fan, preserving counterclockwise order
for(int f=2;f<items.Length-1;f++) {//one face/triangle per loop, 2 triangles in this case
face=new Face();
//only grab three vertices
//first vertex is always the 0 for the fan
subitems=items[1].Split('/');//12,,384 for the first triangle
idxV=Convert.ToInt32(subitems[0])-1;//11 for the first triangle
if(subitems[1]=="") {//no texture
idxT=-1;
}
else {
idxT=Convert.ToInt32(subitems[1])-1;
}
idxN=Convert.ToInt32(subitems[2])-1;//383 for the first triangle
vertnorm=new VertexNormal();
vertnorm.Vertex=listV[idxV];
if(idxT!=-1) {
vertnorm.Texture=listT[idxT];
}
vertnorm.Normal=listN[idxN];
face.IndexList.Add(d3Object.GetIndexForVertNorm(vertnorm));
//second vertex
subitems=items[f].Split('/');//51,,443 for the first triangle
idxV=Convert.ToInt32(subitems[0])-1;//50 for the first triangle
if(subitems[1]=="") {//no texture
idxT=-1;
}
else {
idxT=Convert.ToInt32(subitems[1])-1;
}
idxN=Convert.ToInt32(subitems[2])-1;//442 for the first triangle
vertnorm=new VertexNormal();
vertnorm.Vertex=listV[idxV];
if(idxT!=-1) {
vertnorm.Texture=listT[idxT];
}
vertnorm.Normal=listN[idxN];
face.IndexList.Add(d3Object.GetIndexForVertNorm(vertnorm));
//third vertex
subitems=items[f+1].Split('/');//384,,336 for the first triangle
idxV=Convert.ToInt32(subitems[0])-1;//383 for the first triangle
if(subitems[1]=="") {//no texture
idxT=-1;
}
else {
idxT=Convert.ToInt32(subitems[1])-1;
}
idxN=Convert.ToInt32(subitems[2])-1;//335 for the first triangle
vertnorm=new VertexNormal();
vertnorm.Vertex=listV[idxV];
if(idxT!=-1) {
vertnorm.Texture=listT[idxT];
}
vertnorm.Normal=listN[idxN];
face.IndexList.Add(d3Object.GetIndexForVertNorm(vertnorm));
d3Object.Faces.Add(face);
}
i++;
continue;
}
//might be another kind of row that we missed above
i++;
}
if(d3Object!=null) {
d3ObjectGroup.D3Objects.Add(d3Object);//add the last object to the group
}
return d3ObjectGroup;
}
///<summary>Should only be run on startup for efficiency.</summary>
private void ImportObj() {
byte[] buffer=null;
if(toothID=="1" || toothID=="16") {
buffer=Properties.Resources.tooth1;
}
else if(toothID=="2" || toothID=="15") {
buffer=Properties.Resources.tooth2;
}
else if(toothID=="3" || toothID=="14") {
//file+="3.obj";
buffer=Properties.Resources.tooth3;
}
else if(toothID=="4" || toothID=="13") {
buffer=Properties.Resources.tooth4;
}
else if(toothID=="5" || toothID=="12") {
buffer=Properties.Resources.tooth5;
}
else if(toothID=="6" || toothID=="11") {
buffer=Properties.Resources.tooth6;
}
else if(toothID=="7" ||toothID=="10") {
buffer=Properties.Resources.tooth7;
}
else if(toothID=="8" || toothID=="9") {
buffer=Properties.Resources.tooth8;
}
else if(toothID=="17" || toothID=="32") {
buffer=Properties.Resources.tooth32;
}
else if(toothID=="18" || toothID=="31") {
buffer=Properties.Resources.tooth31;
}
else if(toothID=="19" || toothID=="30") {
buffer=Properties.Resources.tooth30;
}
else if(toothID=="20" || toothID=="29") {
buffer=Properties.Resources.tooth29;
}
else if(toothID=="21" || toothID=="28") {
buffer=Properties.Resources.tooth28;
}
else if(toothID=="22" || toothID=="27") {
buffer=Properties.Resources.tooth27;
}
else if(toothID=="23" || toothID=="24" || toothID=="25" ||toothID=="26") {
buffer=Properties.Resources.tooth25;
}
else if(toothID=="A" || toothID=="J") {
buffer=Properties.Resources.toothA;
}
else if(toothID=="B" || toothID=="I") {
buffer=Properties.Resources.toothB;
}
else if(toothID=="C" || toothID=="H") {
buffer=Properties.Resources.toothC;
}
else if(toothID=="D" || toothID=="G") {
buffer=Properties.Resources.toothD;
}
else if(toothID=="E" || toothID=="F") {
buffer=Properties.Resources.toothE;
}
else if(toothID=="P" || toothID=="O" || toothID=="Q" || toothID=="N") {
buffer=Properties.Resources.toothP;
}
else if(toothID=="R" || toothID=="M") {
buffer=Properties.Resources.toothR;
}
else if(toothID=="S" || toothID=="L") {
buffer=Properties.Resources.toothS;
}
else if(toothID=="T" || toothID=="K") {
buffer=Properties.Resources.toothT;
}
else if(toothID=="implant"){
buffer=Properties.Resources.implant;
}
bool flipHorizontally=false;
if(toothID!="implant" && IdToInt(toothID)>=9 && IdToInt(toothID)<=24) {
flipHorizontally=true;
}
//There will not necessarily be the same number of vertices as normals.
//But as they get paired up later, we will create a 1:1 relationship.
List<Vertex3f> verts=new List<Vertex3f>();
List<Vertex3f> norms=new List<Vertex3f>();
Groups=new List<ToothGroup>();
//ArrayList ALf=new ArrayList();//faces always part of a group
List<Face> faces=new List<Face>();
MemoryStream stream=new MemoryStream(buffer);
using(StreamReader sr = new StreamReader(stream)){
String line;
Vertex3f vertex;
string[] items;
string[] subitems;
Face face;
ToothGroup group=null;
while((line = sr.ReadLine()) != null) {
if(line.StartsWith("#")//comment
|| line.StartsWith("mtllib")//material library. We build our own.
|| line.StartsWith("usemtl")//use material
|| line.StartsWith("o")) {//object. There's only one object
continue;
}
if(line.StartsWith("v ")) {//vertex
items=line.Split(new char[] { ' ' });
vertex=new Vertex3f();//float[3];
if(flipHorizontally) {
vertex.X=-Convert.ToSingle(items[1],CultureInfo.InvariantCulture);
}
else {
vertex.X=Convert.ToSingle(items[1],CultureInfo.InvariantCulture);
}
vertex.Y=Convert.ToSingle(items[2],CultureInfo.InvariantCulture);
vertex.Z=Convert.ToSingle(items[3],CultureInfo.InvariantCulture);
verts.Add(vertex);
continue;
}
if(line.StartsWith("vn")) {//vertex normal
items=line.Split(new char[] { ' ' });
vertex=new Vertex3f();//new float[3];
if(flipHorizontally) {
vertex.X=-Convert.ToSingle(items[1],CultureInfo.InvariantCulture);
}
else {
vertex.X=Convert.ToSingle(items[1],CultureInfo.InvariantCulture);
}
vertex.Y=Convert.ToSingle(items[2],CultureInfo.InvariantCulture);
vertex.Z=Convert.ToSingle(items[3],CultureInfo.InvariantCulture);
norms.Add(vertex);
continue;
}
if(line.StartsWith("g")) {//group
if(group != null) {
//move all faces into the existing group
group.Faces=new List<Face>(faces);
//move the existing group into the AL
Groups.Add(group);
}
//start a new group to which all subsequent faces will be attached.
group=new ToothGroup();
faces=new List<Face>();
//group.PaintColor=Color.FromArgb(255,255,253,209);//default to enamel
switch(line) {
default:
group.GroupType=ToothGroupType.None;
break;
case "g cube1_Cementum":
group.GroupType=ToothGroupType.Cementum;
break;
case "g cube1_Enamel2":
group.GroupType=ToothGroupType.Enamel;
break;
case "g cube1_M":
group.GroupType=ToothGroupType.M;
break;
case "g cube1_D":
group.GroupType=ToothGroupType.D;
break;
case "g cube1_F":
group.GroupType=ToothGroupType.F;
break;
case "g cube1_I":
group.GroupType=ToothGroupType.I;
break;
case "g cube1_L":
group.GroupType=ToothGroupType.L;
break;
case "g cube1_V":
group.GroupType=ToothGroupType.V;
break;
case "g cube1_B":
group.GroupType=ToothGroupType.B;
break;
case "g cube1_O":
group.GroupType=ToothGroupType.O;
break;
case "g cube1_Canals":
group.GroupType=ToothGroupType.Canals;
break;
case "g cube1_Buildup":
group.GroupType=ToothGroupType.Buildup;
break;
case "g cube1_Implant":
group.GroupType=ToothGroupType.Implant;
break;
case "g cube1_EnamelF":
group.GroupType=ToothGroupType.EnamelF;
break;
case "g cube1_DF":
group.GroupType=ToothGroupType.DF;
break;
case "g cube1_MF":
group.GroupType=ToothGroupType.MF;
break;
case "g cube1_IF":
group.GroupType=ToothGroupType.IF;
break;
}
}
if(line.StartsWith("f")) {//face. Usually 4 vertices, but not always.
items=line.Split(new char[] { ' ' });
face=new Face();
VertexNormal vertnorm;
int vertIdx;
int normIdx;
//do we need to load these backwards for flipping, so they'll still be counterclockwise?
//It seems to work anyway, but it's something to keep in mind for later.
for(int i=1;i<items.Length;i++){//face.GetLength(0);i++) {
subitems=items[i].Split(new char[] { '/' });// eg: 9//9 this is an index to a given vertex/normal.
vertnorm=new VertexNormal();//unlike the old way of just storing idxs, we will actually store vertices.
vertIdx=Convert.ToInt32(subitems[0])-1;
normIdx=Convert.ToInt32(subitems[2])-1;
vertnorm.Vertex=verts[vertIdx];
vertnorm.Normal=norms[normIdx];
face.IndexList.Add(GetIndexForVertNorm(vertnorm));
}
faces.Add(face);
continue;
}
}//while readline
//For the very last group, move all faces into the group
group.Faces=new List<Face>(faces);//new int[ALf.Count][][];
//move the last group into the AL
Groups.Add(group);
}
//MessageBox.Show(Vertices[2,2].ToString());
}
public Face Copy()
{
Face f=new Face();
f.IndexList=new List<int>(this.IndexList);
return f;
}
