public VzOFF(String path, VzMesh.Style style) throws IOException {
this.path = path;
this.style = style;
BufferedReader ins = new BufferedReader(new FileReader(new File(path)));
FloatArray vertexArray = new FloatArray();
IntArray indexArray = new IntArray();
FloatArray normalArray;
String header = ins.readLine();
if (!header.equals("OFF")) throw new IOException("Not an OFF file");
int nvertexArray, nfaces, nedges;
if (true) {
String sizes = ins.readLine();
String toks[] = fastSplit(sizes);
nvertexArray = Integer.parseInt(toks[0]);
nfaces = Integer.parseInt(toks[1]);
nedges = Integer.parseInt(toks[2]);
}
for (int i = 0; i < nvertexArray; i++) {
String line = ins.readLine();
String toks[] = fastSplit(line);
float x = Float.parseFloat(toks[0]);
float y = Float.parseFloat(toks[1]);
float z = Float.parseFloat(toks[2]);
xyz_min[0] = Math.min(xyz_min[0], x);
xyz_min[1] = Math.min(xyz_min[1], y);
xyz_min[2] = Math.min(xyz_min[2], z);
xyz_max[0] = Math.max(xyz_max[0], x);
xyz_max[1] = Math.max(xyz_max[1], y);
xyz_max[2] = Math.max(xyz_max[2], z);
vertexArray.add(x);
vertexArray.add(y);
vertexArray.add(z);
}
float vs[] = vertexArray.getData();
float ns[] = new float[vs.length];
normalArray = new FloatArray(ns);
for (int i = 0; i < nfaces; i++) {
String line = ins.readLine();
String toks[] = fastSplit(line);
int len = Integer.parseInt(toks[0]);
assert (len + 1 == toks.length);
for (int j = 2; j + 1 <= len; j++) {
int a = Integer.parseInt(toks[1]);
int b = Integer.parseInt(toks[j]);
int c = Integer.parseInt(toks[j + 1]);
indexArray.add(a);
indexArray.add(b);
indexArray.add(c);
float vba[] =
new float[] {
vs[b * 3 + 0] - vs[a * 3 + 0],
vs[b * 3 + 1] - vs[a * 3 + 1],
vs[b * 3 + 2] - vs[a * 3 + 2]
};
float vca[] =
new float[] {
vs[c * 3 + 0] - vs[a * 3 + 0],
vs[c * 3 + 1] - vs[a * 3 + 1],
vs[c * 3 + 2] - vs[a * 3 + 2]
};
float n[] = LinAlg.normalize(LinAlg.crossProduct(vba, vca));
for (int k = 0; k < 3; k++) {
ns[3 * a + k] += n[k];
ns[3 * b + k] += n[k];
ns[3 * c + k] += n[k];
}
}
}
for (int i = 0; i + 2 < ns.length; i += 3) {
double mag = Math.sqrt(ns[i + 0] * ns[i + 0] + ns[i + 1] * ns[i + 1] + ns[i + 2] * ns[i + 2]);
ns[i + 0] /= mag;
ns[i + 1] /= mag;
ns[i + 2] /= mag;
}
mesh =
new VzMesh(
new VisVertexData(vs, vs.length / 3, 3),
new VisVertexData(ns, ns.length / 3, 3),
new VisIndexData(indexArray),
VzMesh.TRIANGLES);
ins.close();
}
