Here's a topic about fixed point math:
It may be retarded but you could probably simulate numbers like 1.3 by using two variables.
thanks for the link. I didn't knew you can include the player0X/Y in the writing to spare a variable. However my issue is probably simple for good programmer. all the parts I use this methode work fine safe the part on the mountain with lightnings (cf. video on the blog). If the player go left and slide a bit, he can stop by pushing joystick right. but if you slide right and push left to stop sliding, the increment still going as the value can' t be set at zero. I got this for over a year and left for the moment as I think the issue come from another part of the program.
I ll post it later as I prefer increase my knowledge by doing other part that eventually help me to understand the problem.