Hi,
this behavior gives you a relative Cartesian coordinate system.
You can set a relative origin, rotate the coordinate system and define a function in the coordinate system.
Demo + Behavior
Properties:
<img src="http://dl.dropbox.com/u/31151399/Construct2/Behaviors/joe7_Cartesian/postimages/properties.png" border="0">
Actions:
<img src="http://dl.dropbox.com/u/31151399/Construct2/Behaviors/joe7_Cartesian/postimages/actions.png" border="0">
Expressions:
<img src="http://dl.dropbox.com/u/31151399/Construct2/Behaviors/joe7_Cartesian/postimages/expressions.png" border="0">
Have fun and all suggestions are welcome, <img src="smileys/smiley17.gif" border="0" align="middle">
Joe7