private void readSurfaces(String filepath) {
// System.out.println("\nBuilding surfaces...");
// This method is the last to be called out of all of the methods in this class. Once all
// of the vertex information has been read in, as well as the materials, they are arranged
// into the surfaces and polygons that form that object itself...See the included file
// CustomOBJSpecs.txt for more details
int curMat = 0; // this is a reference to the current material to be used
// int curIndex = 0; //This is a temporary variable for reading in vertices of polygons
SurfCell curSurf; // the current surface being worked with
// PolyCell curPoly; //the current polygon in the surface
String matName; // This is the material name from the obj file. It will be used to find the
// material in the list
String line; // the current line being analyzed
StringTokenizer token; // For tokenizing the string to grab the different components of the line
// StringTokenizer vertTokens; //For tokenizing the vertex entries in a polygon (surface) line
FileReader fr; // Just a file reading stream for the file
BufferedReader objFile; // this wraps around the file reader so we can do things like readLine()
boolean inSmooth = false; // a flag for whether or not a given face is in a surface
try {
fr = new FileReader(filepath);
objFile = new BufferedReader(fr);
line = objFile.readLine();
curSurf = surfHead;
while (line != null) {
if (line.length() > 0) {
switch (line.charAt(0)) {
case '#':
case '!':
case '$':
case '\n':
case 'v': // These are all comments or vertex info...skip them :-)
break;
case 'u':
token = new StringTokenizer(line);
line = token.nextToken(); // "eat" up the usemtl keyword
matName = token.nextToken(); // actually grab the material name
boolean found = false;
int i = 0;
while (!found && i < numMats)
// for(int i = 0; i < numMats; i++)
{
// simply compare the stored material name to the name retrieved from the OBJ file.
// if they match, set curMat to whatever index that material is at
if (materials[i].materialName.toUpperCase().compareTo(matName.toUpperCase()) == 0) {
curMat = i; // Set curMat to the current material index
found = true;
}
i++;
}
if (!found) {
System.out.printf(
"Group %s material %s not found - using default\n", curSurf.name, matName);
curSurf.material = 0;
} else curSurf.material = curMat;
break;
case 's':
token = new StringTokenizer(line);
line = token.nextToken(); // "eat" up the s at the beginning of the line
// If there are more tokens on the line (specifically, the word "off")
// then we will read them in. The only one that we really care about is if it's
// an "off" but it must be read if it's there.
if (token.hasMoreTokens()) line = token.nextToken();
// if smooth groups are turned off and no new smooth group is specified...
if (line.toUpperCase().compareTo("OFF") == 0) {
inSmooth = false;
} else // We are simply starting a new smooth group
{
inSmooth = true;
// curSurf.smooth = inSmooth;
} // end else
break;
case 'f':
if (curSurf != null) {
addPolyToSurf(curSurf, line, inSmooth);
} else // no active surface - create a "default" surface and add this poly to it
{
System.out.printf("ReadSurfaces: No active surface available\n");
System.out.printf("Creating a default surface\n");
if (inSmooth) surfHead = new SurfCell("default");
else surfHead = new SurfCell("default");
curSurf = surfHead;
addPolyToSurf(curSurf, line, inSmooth);
}
curSurf.numPoly++; // Surface level count of the polygons
numPolys++; // PMesh level count of the polygons
break;
case 'g': // Starts a new surface - if inSmooth is true set the smooth flag in
// that surface
token = new StringTokenizer(line);
line = token.nextToken(); // "eat" up the g at the beginning of the line
// If there are more tokens on the line (specifically a group name)
// then we will read it in.
if (token.hasMoreTokens()) line = token.nextToken();
if (line == null) line = new String("Group" + numSurf);
if (surfHead == null) // Create first surface
{
surfHead = new SurfCell(line);
curSurf = surfHead;
} else // Advance to next surface
{
curSurf.next = new SurfCell(line);
curSurf = curSurf.next;
}
// Assign beginning variables
numSurf++; // PMesh level count of surfaces break;
default:
break;
} // end switch
} // end if(line.length() > 0)
line = objFile.readLine(); // grab the next line for reading
} // end while(line != null)
objFile.close();
fr.close();
} // end try
catch (IOException exception) {
System.out.println("Error while reading surface data from: " + filepath);
} // end catch
System.out.printf("\n %d vertices %d surfaces\n", numVerts, numSurf);
// System.out.println("\n" + numSurf + " surfaces found");
} // end method readSurfaces
