# Difference between calling glfwGetCursorPos() vs callback
**URL:** https://discourse.glfw.org/t/difference-between-calling-glfwgetcursorpos-vs-callback/1401
**Category:** support
**Created:** [August 12, 2019, 10:03am UTC](https://discourse.glfw.org/t/difference-between-calling-glfwgetcursorpos-vs-callback/1401 "2019-08-12T10:03:30Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@jackywhite](https://discourse.glfw.org/u/jackywhite)
#### Post date: [August 12, 2019, 10:03am UTC](https://discourse.glfw.org/t/difference-between-calling-glfwgetcursorpos-vs-callback/1401/1 "2019-08-12T10:03:30Z")
What is the practical application of using callback to retrieve cursor position instead of `glfwGetCursorPos()`?
What method should I use to calculate camera rotation, as the difference between previous and current frame’s position of the cursor?
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### Author:  [@dougbinks](https://discourse.glfw.org/u/dougbinks)
#### Post date: [August 12, 2019, 5:47pm UTC](https://discourse.glfw.org/t/difference-between-calling-glfwgetcursorpos-vs-callback/1401/2 "2019-08-12T17:47:17Z")
The cursor callback can be called more than once per frame for every movement event, which could be useful for things like drawing applications.
For camera rotation, `glfwGetCursorPos()` is usually sufficient. This subject is a little more advanced than is easily covered in a forum reply, but there are a number of decent tutorials online you can search for, for example:
[https://learnopengl.com/Getting-started/Camera](https://learnopengl.com/Getting-started/Camera)