Documentation: updated mathutils documentation

Added descriptions of the constructors, and improved the module-level
documentation.

source/blender/python/mathutils/mathutils.c

@@ -38,7 +38,18 @@
 #endif
 
 PyDoc_STRVAR(M_Mathutils_doc,
-"This module provides access to matrices, eulers, quaternions and vectors."
+"This module provides access to the math classes:\n"
+"\n"
+"- :class:`Color`,\n"
+"- :class:`Euler`,\n"
+"- :class:`Matrix`,\n"
+"- :class:`Quaternion`,\n"
+"- :class:`Vector`,\n"
+"\n"
+".. note::\n"
+"\n"
+"   Classes, methods and attributes that accept vectors also accept other numeric sequences,\n"
+"   such as tuples, lists."
 );
 static int mathutils_array_parse_fast(float *array,
                                       int size,

source/blender/python/mathutils/mathutils_Color.c

@@ -811,7 +811,12 @@ static struct PyMethodDef Color_methods[] = {
 
 /* ------------------PY_OBECT DEFINITION-------------------------- */
 PyDoc_STRVAR(color_doc,
-"This object gives access to Colors in Blender."
+".. class:: Color(rgb)\n"
+"\n"
+"   This object gives access to Colors in Blender.\n"
+"\n"
+"   :param rgb: (r, g, b) color values\n"
+"   :type rgb: 3d vector\n"
 );
 PyTypeObject color_Type = {
 	PyVarObject_HEAD_INIT(NULL, 0)

source/blender/python/mathutils/mathutils_Euler.c

@@ -657,7 +657,14 @@ static struct PyMethodDef Euler_methods[] = {
 
 /* ------------------PY_OBECT DEFINITION-------------------------- */
 PyDoc_STRVAR(euler_doc,
-"This object gives access to Eulers in Blender."
+".. class:: Euler(angles, order='XYZ')\n"
+"\n"
+"   This object gives access to Eulers in Blender.\n"
+"\n"
+"   :param angles: Three angles, in radians.\n"
+"   :type angles: 3d vector\n"
+"   :param order: Optional order of the angles, a permutation of ``XYZ``.\n"
+"   :type order: str\n"
 );
 PyTypeObject euler_Type = {
 	PyVarObject_HEAD_INIT(NULL, 0)

source/blender/python/mathutils/mathutils_Matrix.c

@@ -2716,7 +2716,14 @@ static struct PyMethodDef Matrix_methods[] = {
 
 /*------------------PY_OBECT DEFINITION--------------------------*/
 PyDoc_STRVAR(matrix_doc,
-"This object gives access to Matrices in Blender."
+".. class:: Matrix([rows])\n"
+"\n"
+"   This object gives access to Matrices in Blender, supporting square and rectangular\n"
+"   matrices from 2x2 up to 4x4.\n"
+"\n"
+"   :param rows: Sequence of rows.\n"
+"   When ommitted, a 4x4 identity matrix is constructed.\n"
+"   :type rows: 2d number sequence\n"
 );
 PyTypeObject matrix_Type = {
 	PyVarObject_HEAD_INIT(NULL, 0)

source/blender/python/mathutils/mathutils_Quaternion.c

@@ -187,6 +187,8 @@ PyDoc_STRVAR(Quaternion_to_exponential_map_doc,
 "\n"
 "   :return: exponential map.\n"
 "   :rtype: :class:`Vector` of size 3\n"
+"\n"
+"   To convert back to a quaternion, pass it to the :class:`Quaternion` constructor.\n"
 );
 static PyObject *Quaternion_to_exponential_map(QuaternionObject *self)
 {
@@ -1226,7 +1228,29 @@ static PyGetSetDef Quaternion_getseters[] = {
 
 /* ------------------PY_OBECT DEFINITION-------------------------- */
 PyDoc_STRVAR(quaternion_doc,
-"This object gives access to Quaternions in Blender."
+".. class:: Quaternion([seq, [angle]])\n"
+"\n"
+"   This object gives access to Quaternions in Blender.\n"
+"\n"
+"   :param seq: size 3 or 4\n"
+"   :type seq: :class:`Vector`\n"
+"   :param angle: rotation angle, in radians\n"
+"   :type angle: float\n"
+"\n"
+"   The constructor takes arguments in various forms:\n"
+"\n"
+"   (), *no args*\n"
+"       Create an identity quaternion\n"
+"   (*wxyz*)\n"
+"       Create a quaternion from a ``(w, x, y, z)`` vector.\n"
+"   (*exponential_map*)\n"
+"       Create a quaternion from a 3d exponential map vector.\n"
+"\n"
+"       .. seealso:: :meth:`to_exponential_map`\n"
+"   (*axis, angle*)\n"
+"       Create a quaternion representing a rotation of *angle* radians over *axis*.\n"
+"\n"
+"       .. seealso:: :meth:`to_axis_angle`\n"
 );
 PyTypeObject quaternion_Type = {
 	PyVarObject_HEAD_INIT(NULL, 0)

source/blender/python/mathutils/mathutils_Vector.c

@@ -2904,7 +2904,12 @@ static struct PyMethodDef Vector_methods[] = {
  */
 
 PyDoc_STRVAR(vector_doc,
-"This object gives access to Vectors in Blender."
+".. class:: Vector(seq)\n"
+"\n"
+"   This object gives access to Vectors in Blender.\n"
+"\n"
+"   :param seq: Components of the vector, must be a sequence of at least two\n"
+"   :type seq: sequence of numbers\n"
 );
 PyTypeObject vector_Type = {
 	PyVarObject_HEAD_INIT(NULL, 0)