Create README.md

README.md

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+**Play Online:** https://mrbid.github.io/porydrive
+
+How 3D assets are converted from ASCII PLY to C Header files: https://gist.github.com/mrbid/cc1141c5476af0a262eaeaf45f799992
+
+## input
+*  **ESCAPE** = Unlock Mouse
+*  **N** = New Game and Car Color
+*  **W,A,S,D** = Drive Car
+*  **Space** = Brake
+*  **L-Shift** = Boost
+*  **RIGHT CLICK/MOUSE4** = Zoom Snap Close/Ariel
+*  **Mouse Scroll** = Zoom in/out
+*  **C** = Random Car Colors
+*  **R** = Accelerate/step DNA color peel
+*  **F** = FPS to console
+*  **P** = Player stats to console
+*  **O** = Toggle auto drive
+
+## config
+It is possible to tweak the car physics by creating a `config.txt` file in the exec/working directory of the game, here is an example of such config file with the default car physics variables.
+```
+maxspeed 0.0265
+acceleration 0.0028
+inertia 0.0022
+drag 0.00038
+steeringspeed 0.04
+steerinertia 120
+minsteer 0.3
+maxsteer 0.36
+steering_deadzone 0.033
+steeringtransfer 0.023
+steeringtransferinertia 280
+suspension_pitch 3
+suspension_pitch_limit 0.06
+suspension_roll 30
+suspension_roll_limit 0.3
+sticky_collisions 0
+
+ad_min_dstep 0.01
+ad_max_dstep 0.06
+ad_min_speedswitch 2
+ad_maxspeed_reductor 0.5
+```
+#### car physics variables
+- `maxspeed` - top travel speed of car.
+- `acceleration` - increase of speed with respect to time.
+- `inertia` - minimum speed before car will move from a stationary state.
+- `drag` - loss in speed with respect to time.
+- `steeringspeed` - how fast the wheels turn.
+- `steerinertia` - how much of the max steering angle is lost as the car increases in speed _(crude steering loss)_.
+- `minsteer` - minimum steering angle as scalar _(1 = 180 degree)_ attainable after steering loss caused by `steeringintertia`.
+- `maxsteer` - maximum steering angle as scalar _(1 = 180 degree)_ attainable at minimal speeds.
+- `steering_deadzone` - minimum angle of steering considered the deadzone or cutoff, within this angle the steering angle will always be forced to zero.
+- `steeringtransfer` - how much the wheel rotation angle translates into rotation of the body the wheels are connected to _(the car)_.
+- `steeringtransferinertia` - how much the `steeringtransfer` reduces as the car speed increases, this is related to `steerinertia` to give the crude effect of traction loss of the front tires as speed increases and the inability to force the wheels into a wider angle at higher speeds.
+- `suspension_pitch` - suspension pitch increment scalar
+- `suspension_pitch_limit` - max & min pitch limit
+- `suspension_roll` - suspension roll increment scalar
+- `suspension_roll_limit` - max & min roll limit
+- `sticky_collisions` - 0 = bouncy collisions, 1 = sticky collisions
+
+#### auto drive variables
+- `ad_min_dstep` - minimum delta-distance from the porygon that can trigger a change in steering direction. The delta-distance is the amount of change in the distance since the last update.
+- `ad_max_dstep` - maximum delta-distance from the porygon, once this is set any distance above this limit will trigger a change in steering direction.
+- `ad_min_speedswitch` - minimum distance from the porygon before the speed of the car begins to linearly reduce as it approaches the porygon.
+- `ad_maxspeed_reductor` - the rate at which the speed reduces as the car approaches the porygon with respect to `ad_min_speedswitch`.