Add air slowdown

TODO.txt

@@ -19,7 +19,6 @@
   data file, try to somehow hack around it (maybe just convert it to an array in
   the end?) Maybe this: make a standalone C file with the string in it that
   when compiled and run outputs the array.
-- some kinda easteregg in menu or smt
 - culling is very slow now, it showed that distance bailout can accelerate it
   a lot, try to make a more accurate bailaout and see if it's faster (watch
   out for bugs due to false positives)
@@ -56,11 +55,6 @@
   - replay stretching works
   - replay with input not occuring for more that LCR_SETTING_GHOST_STEP
 - replay validation
-- make the racing module usable by itself, e.g. to allow making tools for
-  verifying replays etc., i.e. make the module measure time, count checkpoints
-  etc. DONE?
-- allow slowing down in air like in TM?
-  lower memory)
 - at the end check error handling, make sure the game handles garbage data in
   resource file etc.
 
@@ -76,6 +70,11 @@
 =========== HANDLED ==============
 
 - MAP4: one triangle in top section is missing!
+- allow slowing down in air like in TM?
+- some kinda easteregg in menu or smt
+- make the racing module usable by itself, e.g. to allow making tools for
+  verifying replays etc., i.e. make the module measure time, count checkpoints
+  etc. DONE?
 - add simple particle effects for grass/dirt/drift? Can be just a few squares
   animated from the projected backwheels.
 - FPS logging for optim

media/manual.txt

@@ -8,15 +8,17 @@ WORK IN PROGRESS
 ~~~~~ GENERAL ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Licar is a relatively simple 3D stunt racing game inspired by other popular
-games of the genre such as Trackmania and Stunts. Unlike mainstream video games,
-Licar is completely libre, i.e. free as in freedom (meaning its source code is
-available for any use whatsoever), gratis (free of cost) and its focus lies on
-being well programmed by utilizing minimalism and rejecting harmful "modern"
-programming practice. The game aims to seflessly bring joy and entertainment to
-all people who might enjoy it, even those who have no money, own only very old
-and weak computers and so on. It is not a commercial product and has been made
-purely out of love by a single man. Licar is also more than a game, for example
-it can be used for educational purposes or as a basis for new projects.
+games of the genre, such as Trackmania and Stunts. Unlike mainstream video
+games, Licar is completely libre, i.e. free as in freedom (meaning its source
+code and art assets are available for any use whatsoever), gratis (free of cost)
+and its focus lies in being well programmed by adhering to minimalism and
+rejecting harmful "modern" programming practices. The game aims to seflessly
+bring joy and entertainment to all the people that might enjoy it, even those
+who aren't able or willing to pay and/or watch ads, those owning very old and
+weak computers and so on. It was made in whole by a single man as a completely
+non-commercial product, the development was driven purely by love of the craft
+and other living beings. Licar is also more than a game, for example it may
+serve educational purposes or become a basis for new projects.
 
 The game runs on many platforms and comes in different versions depending on
 what the platforms allow. Some versions may have more features or visual
@@ -71,13 +73,20 @@ speed, times at checkpoints etc.
 
 ~~~~~ CONTROLS ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-Controls are extremely simple. The car is only controlled by 4 directional
-keys: up (accelerate), down (deccelerate, reverse), left (steer left) and
-right (steer right). There are two additional keys, A and B (depending on your
-platform these may be e.g. the K and L letter or RETURN and ESCAPE keys), for
-restarting runs and handling menu.
+Controls are more than simple: the car is driven with only 4 directional keys:
+up (accelerate), down (brake, reverse), left (steer left) and right (steer
+right). There are two additional keys, A and B (depending on your platform these
+may be e.g. K and L keys, RETURN and ESCAPE etc.), for restarting runs and
+handling menu.
 
-PRO TIP: pressing brake while in air stops the car's horizontal rotation!
+Here are some driving tips:
+
+- Tapping brake while steering triggers drifting (if this doesn't work, you may
+  be experiencing keyboard ghosting: the inability of some keyboards to detect
+  certain simultaneous key presses).
+- It's possible to stop the car from rotating mid-air by pressing brake.
+- Similarly, holding down brake in air will slow down the car's horizontal
+  velocity.
 
 ~~~~~ DATA FILE ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -275,9 +284,10 @@ that's meant to help the people.
 
 Q: Can I still voluntarily donate money?
 
-A: Currently it is possible, donation info is on my website (www.tastyfish.cz),
-but I am not dependant on donations and don't even encourage them too much, but
-if you still insist, I'll be very grateful, thank you very much.
+A: Currently it is possible, donation info is somewhere on my website, but I am
+not dependant on donations and am sometimes doubting if it's a good thing to
+accept them, but if you still insist, I'll be very grateful, thank you very
+much.
 
 Q: Why is the physics so buggy?
 

racing.h

@@ -1279,6 +1279,14 @@ uint32_t LCR_racingStep(unsigned int input)
         for (int j = 0; j < 3; ++j)
           LCR_racing.carBody.joints[i].velocity[j] =  
             LCR_racing.carBody.joints[LCR_CAR_JOINTS - 1].velocity[j]; 
+
+      // gradual slowing down mid-air:
+
+      LCR_racing.carBody.joints[4].velocity[0] = 
+        15 * (LCR_racing.carBody.joints[4].velocity[0] / 16);
+
+      LCR_racing.carBody.joints[4].velocity[2] = 
+        15 * (LCR_racing.carBody.joints[4].velocity[2] / 16);
     }
 
     if (input & (LCR_RACING_INPUT_FORW | LCR_RACING_INPUT_BACK))