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+.. default-domain:: C
+
+vec4 extra
+==========
+
+Header: cglm/vec4-ext.h
+
+There are some functions are in called in extra header. These are called extra
+because they are not used like other functions in vec4.h in the future some of
+these functions ma be moved to vec4 header.
+
+Table of contents (click to go):
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Functions:
+
+1. :c:func:`glm_vec4_mulv`
+#. :c:func:`glm_vec4_broadcast`
+#. :c:func:`glm_vec4_eq`
+#. :c:func:`glm_vec4_eq_eps`
+#. :c:func:`glm_vec4_eq_all`
+#. :c:func:`glm_vec4_eqv`
+#. :c:func:`glm_vec4_eqv_eps`
+#. :c:func:`glm_vec4_max`
+#. :c:func:`glm_vec4_min`
+
+Functions documentation
+~~~~~~~~~~~~~~~~~~~~~~~
+
+.. c:function:: void  glm_vec4_mulv(vec4 a, vec4 b, vec4 d)
+
+    multiplies individual items
+
+    Parameters:
+      | *[in]*  **a**  vec1
+      | *[in]*  **b**  vec2
+      | *[out]* **d**  destination
+
+.. c:function:: void  glm_vec4_broadcast(float val, vec4 d)
+
+    fill a vector with specified value
+
+    Parameters:
+      | *[in]*  **val**   value
+      | *[out]* **dest**  destination
+
+.. c:function:: bool  glm_vec4_eq(vec4 v, float val)
+
+    check if vector is equal to value (without epsilon)
+
+    Parameters:
+      | *[in]*  **v**    vector
+      | *[in]*  **val**  value
+
+.. c:function:: bool  glm_vec4_eq_eps(vec4 v, float val)
+
+    check if vector is equal to value (with epsilon)
+
+    Parameters:
+      | *[in]*  **v**    vector
+      | *[in]*  **val**  value
+
+.. c:function:: bool  glm_vec4_eq_all(vec4 v)
+
+    check if vectors members are equal (without epsilon)
+
+    Parameters:
+      | *[in]*  **v**   vector
+
+.. c:function:: bool  glm_vec4_eqv(vec4 v1, vec4 v2)
+
+    check if vector is equal to another (without epsilon) vector
+
+    Parameters:
+      | *[in]*  **vec**   vector 1
+      | *[in]*  **vec**   vector 2
+
+.. c:function:: bool  glm_vec4_eqv_eps(vec4 v1, vec4 v2)
+
+    check if vector is equal to another (with epsilon)
+
+    Parameters:
+      | *[in]*  **v1**    vector1
+      | *[in]*  **v2**    vector2
+
+.. c:function:: float  glm_vec4_max(vec4 v)
+
+    max value of vector
+
+    Parameters:
+      | *[in]*  **v**    vector
+
+.. c:function:: float glm_vec4_min(vec4 v)
+
+     min value of vector
+
+    Parameters:
+      | *[in]*  **v**  vector
+
+.. c:function:: bool glm_vec4_isnan(vec4 v)
+
+    | check if one of items is NaN (not a number)
+    | you should only use this in DEBUG mode or very critical asserts
+
+    Parameters:
+      | *[in]*  **v**  vector
+
+.. c:function:: bool glm_vec4_isinf(vec4 v)
+
+    | check if one of items is INFINITY
+    | you should only use this in DEBUG mode or very critical asserts
+
+    Parameters:
+      | *[in]*  **v**  vector
+
+.. c:function:: bool glm_vec4_isvalid(vec4 v)
+
+    | check if all items are valid number
+    | you should only use this in DEBUG mode or very critical asserts
+
+    Parameters:
+      | *[in]*  **v**  vector
+
+.. c:function:: void glm_vec4_sign(vec4 v, vec4 dest)
+
+    get sign of 32 bit float as +1, -1, 0
+
+    Parameters:
+      | *[in]*   **v**     vector
+      | *[out]*  **dest**  sign vector (only keeps signs as -1, 0, -1)
+
+.. c:function:: void glm_vec4_sqrt(vec4 v, vec4 dest)
+
+    square root of each vector item
+
+    Parameters:
+      | *[in]*   **v**     vector
+      | *[out]*  **dest**  destination vector (sqrt(v))