// returns asset with tri list contain vert positions and corresponding indices
public static ModelAsset ReadFileOBJ(string filepath = "")
{
// complete asset
ModelAsset newAsset = new ModelAsset();
// list used to store position data from OBJ file
List<PointF> positionList = new List<PointF>();
// list used to store position indices from OBJ file
List<List<int>> indicesList = new List<List<int>>();
try
{
// Read each line of the file into a string array. Each element of the array is one line of the file.
string[] lines = System.IO.File.ReadAllLines(filepath);
// OBJ format: only collect valid UV Verts from lines which start with vt
foreach (string line in lines)
{
// TVerts - positions
if (line.StartsWith("vt"))
{
/* Example Lines
3dsMax: vt 0.0854 0.0854 0.0000
Maya: vt 0.0854 0.0854 0.0000
*/
// remove leading 'vt' text from each line of the file
char[] invalidChars = { 'v', 't', ' ' };
string pointString = line.TrimStart(invalidChars);
// remove any leading or trailing spaces
pointString = pointString.Trim();
// split each pt into it's respected parts X,Y,Z
string[] parts = pointString.Split(' ');
if (parts.Length >= 2)
{
float X = Convert.ToSingle(parts[0]);
float Y = Convert.ToSingle(parts[1]);
PointF pt = new PointF(X, Y);
positionList.Add(pt);
}
}
// TVert Indices
if (line.StartsWith("f "))
{
/* Example Lines
3dsMax: f 1/1 2/2 3/3 4/4
Maya: f 1/1/1 2/2/2 3/3/3 4/4/4
*/
// remove leading 'f' text from each line of the file
char[] invalidChars = { 'f', ' ' };
string pointString = line.TrimStart(invalidChars);
// remove any leading or trailing spaces
pointString = pointString.Trim();
// split each pt into it's respected parts A,B,C or A,B,C,D
string[] parts = pointString.Split(' ');
if (parts.Length >= 2)
{
// list containing indices collect from line of file
List<int> indices = new List<int>();
foreach (string p in parts)
{
string[] subParts = p.Split('/');
// the second value in the 1/1/1 is the vertex id
int id = Convert.ToInt32(subParts[1]);
indices.Add(id);
}
// generate Tri object for each tri in faces
// Important: offset the indices by '-1' since arrays start at 0 but indices in the OBJ files start at 1
// Matt@boomerlabs:: you should really do a -1 here and not bother later
switch (indices.Count)
{
case 3: // single tri face
Tri triA = new Tri();
triA.indexA = indices[0]-1;
triA.indexB = indices[1]-1;
triA.indexC = indices[2]-1;
newAsset.TriList.Add(triA);
break;
case 4: // quad face made of two tris
Tri triB = new Tri();
triB.indexA = indices[0]-1;
triB.indexB = indices[1]-1;
triB.indexC = indices[2]-1;
newAsset.TriList.Add(triB);
Tri triC = new Tri();
triC.indexA = indices[2]-1;
triC.indexB = indices[3]-1;
triC.indexC = indices[0]-1;
newAsset.TriList.Add(triC);
break;
}
}
}
}
}
catch (UnauthorizedAccessException) { }
// if UV coordinate data exists go through and assign positions to the Tri's
if (positionList.Count >= 3)
{
foreach (var t in newAsset.TriList)
{
t.posA = positionList[t.indexA];
t.posB = positionList[t.indexB];
t.posC = positionList[t.indexC];
}
}
// Store the number of verts
newAsset.numberOfVerts = positionList.Count();
return newAsset;
}
// returns asset with tri list contain vert positions and corresponding indices
public static ModelAsset ReadFileOBJ(string filepath = "")
{
// complete asset
ModelAsset newAsset = new ModelAsset();
// list used to store position data from OBJ file
List <PointF> positionList = new List <PointF>();
// list used to store position indices from OBJ file
List <List <int> > indicesList = new List <List <int> >();
try
{
// Read each line of the file into a string array. Each element of the array is one line of the file.
string[] lines = System.IO.File.ReadAllLines(filepath);
// OBJ format: only collect valid UV Verts from lines which start with vt
foreach (string line in lines)
{
// TVerts - positions
if (line.StartsWith("vt"))
{
/* Example Lines
* 3dsMax: vt 0.0854 0.0854 0.0000
* Maya: vt 0.0854 0.0854 0.0000
*/
// remove leading 'vt' text from each line of the file
char[] invalidChars = { 'v', 't', ' ' };
string pointString = line.TrimStart(invalidChars);
// remove any leading or trailing spaces
pointString = pointString.Trim();
// split each pt into it's respected parts X,Y,Z
string[] parts = pointString.Split(' ');
if (parts.Length >= 2)
{
float X = Convert.ToSingle(parts[0]);
float Y = Convert.ToSingle(parts[1]);
PointF pt = new PointF(X, Y);
positionList.Add(pt);
}
}
// TVert Indices
if (line.StartsWith("f "))
{
/* Example Lines
* 3dsMax: f 1/1 2/2 3/3 4/4
* Maya: f 1/1/1 2/2/2 3/3/3 4/4/4
*/
// remove leading 'f' text from each line of the file
char[] invalidChars = { 'f', ' ' };
string pointString = line.TrimStart(invalidChars);
// remove any leading or trailing spaces
pointString = pointString.Trim();
// split each pt into it's respected parts A,B,C or A,B,C,D
string[] parts = pointString.Split(' ');
if (parts.Length >= 2)
{
// list containing indices collect from line of file
List <int> indices = new List <int>();
foreach (string p in parts)
{
string[] subParts = p.Split('/');
// the second value in the 1/1/1 is the vertex id
int id = Convert.ToInt32(subParts[1]);
indices.Add(id);
}
// generate Tri object for each tri in faces
// Important: offset the indices by '-1' since arrays start at 0 but indices in the OBJ files start at 1
// Matt@boomerlabs:: you should really do a -1 here and not bother later
switch (indices.Count)
{
case 3: // single tri face
Tri triA = new Tri();
triA.indexA = indices[0] - 1;
triA.indexB = indices[1] - 1;
triA.indexC = indices[2] - 1;
newAsset.TriList.Add(triA);
break;
case 4: // quad face made of two tris
Tri triB = new Tri();
triB.indexA = indices[0] - 1;
triB.indexB = indices[1] - 1;
triB.indexC = indices[2] - 1;
newAsset.TriList.Add(triB);
Tri triC = new Tri();
triC.indexA = indices[2] - 1;
triC.indexB = indices[3] - 1;
triC.indexC = indices[0] - 1;
newAsset.TriList.Add(triC);
break;
}
}
}
}
}
catch (UnauthorizedAccessException) { }
// if UV coordinate data exists go through and assign positions to the Tri's
if (positionList.Count >= 3)
{
foreach (var t in newAsset.TriList)
{
t.posA = positionList[t.indexA];
t.posB = positionList[t.indexB];
t.posC = positionList[t.indexC];
}
}
// Store the number of verts
newAsset.numberOfVerts = positionList.Count();
return(newAsset);
}
