- added a new math function double_round, useful for rounding a number to a number of decimal places.

- added Mathutils vector method, vec.asTuple(round), since this is tedious in python and fairly common task.

source/blender/python/generic/vector.c

@@ -48,6 +48,7 @@ static PyObject *Vector_Negate( VectorObject * self );
 static PyObject *Vector_Resize2D( VectorObject * self );
 static PyObject *Vector_Resize3D( VectorObject * self );
 static PyObject *Vector_Resize4D( VectorObject * self );
+static PyObject *Vector_ToTuple( VectorObject * self, PyObject *value );
 static PyObject *Vector_ToTrackQuat( VectorObject * self, PyObject * args );
 static PyObject *Vector_Reflect( VectorObject *self, VectorObject *value );
 static PyObject *Vector_Cross( VectorObject * self, VectorObject * value );
@@ -61,6 +62,7 @@ static struct PyMethodDef Vector_methods[] = {
 	{"resize2D", (PyCFunction) Vector_Resize2D, METH_NOARGS, NULL},
 	{"resize3D", (PyCFunction) Vector_Resize3D, METH_NOARGS, NULL},
 	{"resize4D", (PyCFunction) Vector_Resize4D, METH_NOARGS, NULL},
+	{"toTuple", (PyCFunction) Vector_ToTuple, METH_O, NULL},
 	{"toTrackQuat", ( PyCFunction ) Vector_ToTrackQuat, METH_VARARGS, NULL},
 	{"reflect", ( PyCFunction ) Vector_Reflect, METH_O, NULL},
 	{"cross", ( PyCFunction ) Vector_Cross, METH_O, NULL},
@@ -236,6 +238,30 @@ static PyObject *Vector_Resize4D(VectorObject * self)
 	Py_INCREF(self);
 	return (PyObject*)self;
 }
+
+/*----------------------------Vector.resize4D() ------------------
+  resize the vector to x,y,z,w */
+static PyObject *Vector_ToTuple(VectorObject * self, PyObject *value)
+{
+	int ndigits= PyLong_AsSsize_t(value);
+	int x;
+
+	PyObject *ret;
+
+	if(ndigits > 22 || ndigits < 0) { /* accounts for non ints */
+		PyErr_SetString(PyExc_TypeError, "vector.key(ndigits): ndigits must be between 0 and 21");
+		return NULL;
+	}
+
+	ret= PyTuple_New(self->size);
+
+	for(x = 0; x < self->size; x++) {
+		PyTuple_SET_ITEM(ret, x, PyFloat_FromDouble(double_round((double)self->vec[x], ndigits)));
+	}
+
+	return ret;
+}
+
 /*----------------------------Vector.toTrackQuat(track, up) ----------------------
   extract a quaternion from the vector and the track and up axis */
 static PyObject *Vector_ToTrackQuat( VectorObject * self, PyObject * args )