/** This method is a hack. I really want another constructor. */
public static Obj3d parseFile(InputStream is, ModelViewer modelViewer, boolean register)
throws IOException, FileFormatException {
StreamTokenizer st = new StreamTokenizer(new BufferedReader(new InputStreamReader(is)));
st.eolIsSignificant(true);
st.commentChar('#');
Obj3d obj3d = new Obj3d(st, modelViewer, register);
// should be at end of file
is.close();
if (st.ttype != StreamTokenizer.TT_EOF) {
throw new FileFormatException(is.toString());
}
return obj3d;
}
public void loadTree() {
System.out.println("Loading tree");
StreamTokenizer stream = null;
try {
FileInputStream f = new FileInputStream(tree);
Reader input = new BufferedReader(new InputStreamReader(f));
stream = new StreamTokenizer(input);
stream.resetSyntax();
stream.wordChars(32, 127);
} catch (Exception e) {
System.out.println("Error opening " + tree);
System.exit(1);
}
list = new ArrayList();
try {
// read the file to the end
while (stream.nextToken() != StreamTokenizer.TT_EOF) {
// is a word being read
if (stream.ttype == StreamTokenizer.TT_WORD) {
list.add(new String(stream.sval));
}
// is a number being read
if (stream.ttype == StreamTokenizer.TT_NUMBER) {
list.add(new Double(stream.nval));
}
}
} catch (Exception e) {
System.out.println("\nError reading " + tree + ". Exiting...");
System.exit(1);
}
}
public String[] parseTokens(String line) throws IOException {
List tokens = new ArrayList();
/*StringTokenizer st = new StringTokenizer(line);
String token;
while((token = st.nextToken()) != null) {
tokens.add(token);
} */
StreamTokenizer st = new StreamTokenizer(new StringReader(line));
st.parseNumbers();
st.wordChars('_', '_'); // A word can be THIS_IS_A_WORD
int token = st.nextToken();
while (token != StreamTokenizer.TT_EOF) {
String element = null;
switch (token) {
case StreamTokenizer.TT_NUMBER:
element = String.valueOf(st.nval);
break;
case StreamTokenizer.TT_WORD:
element = st.sval;
break;
case '"':
case '\'':
element = st.sval;
break;
case StreamTokenizer.TT_EOL:
break;
case StreamTokenizer.TT_EOF:
break;
default:
element = String.valueOf((char) st.ttype);
break;
}
if (element != null) tokens.add(element);
token = st.nextToken();
}
String[] result = new String[tokens.size()];
for (int index = 0; index < tokens.size(); index++) result[index] = (String) tokens.get(index);
return result;
}
/**
* Parses a text file and creates an Obj3d. The file format is as follows:
*
* <pre>
*
* # a simple kite made of two triangular polygons
* # by foo bar, 27 Aug 2002
* 2
* t f CC99FF 12.1 2.4 3.5, 12.4 2.2 3.5, 3.2 5 7.4,
* t t 336699 9.7 0 3.5, 2.2 2.2 3.5, 3.2 5 7.3,
*
* </pre>
*
* The above represents an Obj3d with two polygons, the second of which is double sided; each is a
* differnt color; each is made up of 3 points. Both cast shadows. The first flag indicates if the
* polygon casts a shadow. The second flag indicates if the polygon is double sided.
*/
public Obj3d(StreamTokenizer st, ModelViewer modelViewer, boolean register)
throws IOException, FileFormatException {
// call to constructor must be first, but we do not
// know how many polygons yet, hence the following
this(modelViewer, register);
// gobble EOL's due to comments
while (st.nextToken() == StreamTokenizer.TT_EOL) {;
}
// how many polygons
int num = (int) st.nval;
// set num polygons
this.setNumPolygons(num);
// gobble up new line
st.nextToken();
// Tools3d.debugTokens(st); //tmp
// System.exit(0);
// read a line a data for each polygon
for (int i = 0; i < num; i++) {
// has shadow ?
st.nextToken();
boolean shadow = "t".equals(st.sval);
// double sided ?
st.nextToken();
boolean doubleSided = "t".equals(st.sval);
// color - a hex number
Color color = null;
st.nextToken();
try {
color = Color.decode("0x" + st.sval);
} catch (NumberFormatException e) {
throw new FileFormatException(
"Unable to parse color: " + st.sval + ", polygon index: " + i);
}
if (color == null) {
color = COLOR_DEFAULT;
}
// read point co-ords until we reach end of line
Vector points = new Vector();
while (st.nextToken() != StreamTokenizer.TT_EOL) {
float[] p = new float[3];
p[0] = (float) st.nval;
st.nextToken();
p[1] = (float) st.nval;
st.nextToken();
p[2] = (float) st.nval;
// gobble up comma which seperates points
// note there must be a comma after the last point
if (st.nextToken() != ',') {
throw new FileFormatException("Unable to parse co-ordinates; comma expected: " + st);
}
points.addElement(p);
}
// convert vector to an array
float[][] vs = new float[points.size()][];
for (int j = 0; j < points.size(); j++) {
vs[j] = (float[]) points.elementAt(j);
}
// finally, add the polygon
if (!shadow) {
this.addPolygon(vs, color, doubleSided);
} else {
this.addPolygonWithShadow(vs, color, doubleSided);
}
}
}
