Raydium 3D Game Engine

I'm working on a new feautre.
The idea is: When you pass a circuit, the velocity of the game will become slower and slower and then the game will return to the menu for select a new ciruit.
Is a good idea?

Anyway i'm having problems to slowdown the game. Currently i'm trying with this code.

(this code goes at the end of change_game_state function)

Of course there are more lines of code here and there, but that's the important thing, i suppose

It "works" but the slowdown is quite irregular, with variations in the velocity of the game... ideas?

Good idea. "slowdown" must be a float var and should be incremented with "raydium_frame_time" (with a factor ?) if you want a linear effect.

still having problems, but i think that the problem is heredated from raydium_ode

I put here a link to a diff of mania_drive with my testing changes:
http://www.guadagames.com/demos/mania_drive_diff.diff

i have made the diff with diff -uw , is right?