/**
* Gets a contour surface for a specified image value.
*
* @param c the image value to contour.
* @param withNormals true, for normal vectors; false, otherwise.
*/
public Contour getContour(float c) {
IntList tlist = new IntList();
FloatList xlist = new FloatList();
FloatList ulist = _normals ? new FloatList() : null;
march(
_s1.getCount(),
_s2.getCount(),
_s3.getCount(),
_s1.getDelta(),
_s2.getDelta(),
_s3.getDelta(),
_s1.getFirst(),
_s2.getFirst(),
_s3.getFirst(),
_f,
c,
tlist,
xlist,
ulist);
Contour contour = new Contour();
contour.i = tlist.trim();
contour.x = xlist.trim();
contour.u = _normals ? ulist.trim() : null;
if (_swap13) {
float[] x = contour.x;
float[] u = contour.u;
for (int i = x.length - 3; i >= 0; i -= 3) {
float x1 = x[i];
float x3 = x[i + 2];
x[i] = x3;
x[i + 2] = x1;
if (u != null) {
float u1 = u[i];
float u3 = u[i + 2];
u[i] = u3;
u[i + 2] = u1;
}
}
}
return contour;
}
