1 files changed, 40 insertions, 0 deletions
diff --git a/source/blender/python/mathutils/mathutils.h b/source/blender/python/mathutils/mathutils.h
index 4aa26dcc5be..d73d2afe69b 100644
--- a/source/blender/python/mathutils/mathutils.h
+++ b/source/blender/python/mathutils/mathutils.h
@@ -162,28 +162,56 @@ void _BaseMathObject_RaiseNotFrozenExc(const BaseMathObject *self);
        0)
 
 /* utility func */
+/**
+ * Helper function.
+ * \return length of `value`, -1 on error.
+ */
 int mathutils_array_parse(
     float *array, int array_min, int array_max, PyObject *value, const char *error_prefix);
+/**
+ * \return -1 is returned on error and no allocation is made.
+ */
 int mathutils_array_parse_alloc(float **array,
                                 int array_min,
                                 PyObject *value,
                                 const char *error_prefix);
+/**
+ * Parse an array of vectors.
+ */
 int mathutils_array_parse_alloc_v(float **array,
                                   int array_dim,
                                   PyObject *value,
                                   const char *error_prefix);
+/**
+ * Parse an sequence array_dim integers into array.
+ */
 int mathutils_int_array_parse(int *array,
                               int array_dim,
                               PyObject *value,
                               const char *error_prefix);
+/**
+ * Parse sequence of array_dim sequences of integers and return allocated result.
+ */
 int mathutils_array_parse_alloc_vi(int **array,
                                    int array_dim,
                                    PyObject *value,
                                    const char *error_prefix);
+/**
+ * Parse sequence of variable-length sequences of int and return allocated
+ * triple of arrays to represent the result:
+ * The flattened sequences are put into *array.
+ * The start index of each sequence goes into start_table.
+ * The length of each index goes into len_table.
+ */
 int mathutils_array_parse_alloc_viseq(
     int **array, int **start_table, int **len_table, PyObject *value, const char *error_prefix);
 int mathutils_any_to_rotmat(float rmat[3][3], PyObject *value, const char *error_prefix);
 
+/**
+ * helper function that returns a Python `__hash__`.
+ *
+ * \note consistent with the equivalent tuple of floats (CPython's 'tuplehash')
+ */
 Py_hash_t mathutils_array_hash(const float *float_array, size_t array_len);
 
 /* zero remaining unused elements of the array */
@@ -194,9 +222,21 @@ Py_hash_t mathutils_array_hash(const float *float_array, size_t array_len);
 
 #define MU_ARRAY_FLAGS (MU_ARRAY_ZERO | MU_ARRAY_SPILL)
 
+/**
+ * Column vector multiplication (Matrix * Vector).
+ * <pre>
+ * [1][4][7]   [a]
+ * [2][5][8] * [b]
+ * [3][6][9]   [c]
+ * </pre>
+ *
+ * \note Vector/Matrix multiplication is not commutative.
+ * \note Assume read callbacks have been done first.
+ */
 int column_vector_multiplication(float r_vec[4], VectorObject *vec, MatrixObject *mat);
 
 #ifndef MATH_STANDALONE
 /* dynstr as python string utility functions */
+/* dynstr as python string utility functions, frees 'ds'! */
 PyObject *mathutils_dynstr_to_py(struct DynStr *ds);
 #endif