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(svn r25115) -Fix (r8973) [FS#5492-ish]: [NewGRF] Acceleration of NewGRF aircraft was too fast, while acceleration of default aircraft was way too slow. I.e. choose wisely who to let write the software for your orbiter.

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frosch
2013-03-22 21:27:13 +00:00
parent 3e7f180298
commit 789e4a8998
4 changed files with 23 additions and 11 deletions
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9
src/aircraft_cmd.cpp
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@@ -598,7 +598,14 @@ enum AircraftSpeedLimits {
*/
static int UpdateAircraftSpeed(Aircraft *v, uint speed_limit = SPEED_LIMIT_NONE, bool hard_limit = true)
{
uint spd = v->acceleration * 16;
/**
* 'acceleration' has the unit 3/8 mph/tick. This function is called twice per tick.
* So the speed amount we need to accelerate is:
* acceleration * 3 / 16 mph = acceleration * 3 / 16 * 16 / 10 km-ish/h
* = acceleration * 3 / 10 * 256 * (km-ish/h / 256)
* ~ acceleration * 77 (km-ish/h / 256)
*/
uint spd = v->acceleration * 77;
byte t;
/* Adjust speed limits by plane speed factor to prevent taxiing