# The problem of collision

**URL:** <https://forum.kirupa.com/t/the-problem-of-collision/172976>\
**Category:** Uncategorized\
**Created:** [December 20, 2005, 1:05am UTC](https://forum.kirupa.com/t/the-problem-of-collision/172976 "2005-12-20T01:05:43Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![OMG](https://avatars.discourse-cdn.com/v4/letter/o/9dc877/32.png) [@OMG](https://forum.kirupa.com/u/OMG)\
**Post date:** [December 20, 2005, 1:05am UTC](https://forum.kirupa.com/t/the-problem-of-collision/172976/1 "2005-12-20T01:05:43Z")

</div>

I have read somewhere that predict a collision using hittest isn’t a good way  
any other choices?

ex: I need to move a little boy, on the screen there are: 2 trees, 5 rocks and 1 river(the boy can’t walk on those things)