Hello
Correct me if i got your wrong , you want to modify the Catapult example in C2 to make it limited between 10 to 45 degrees instead of 180° ?
if that what your looking for , then it's easy , i just saw your post and opened the C2 example and added only 2 conditions to the existing one.
here is the capx file : notice the difference between the original code and this there is only more 1 Sub-event made of 2 conditions for the touch event that drags the projectile and set the angle.
https://drive.google.com/open?id=0B3inOTwCmTPDUFlxY09hbUU4SWc