sv_airstrafeaccel_qw cvar for tuning CPMA-style physics

[xonotic/darkplaces.git] / cl_input.c

diff --git a/cl_input.c b/cl_input.c
index aacdfcc5febea6a8eb01f96a559db26a80b603e3..4400e3a60ea8dcd8f4cb3ac4eada29f0b09bc29b 100644 (file)
--- a/cl_input.c
+++ b/cl_input.c
@@ -1099,6 +1099,25 @@ static vec_t CL_IsMoveInDirection(vec_t forward, vec_t side, vec_t angle)
        return 1 - fabs(angle);
 }
 
+static vec_t CL_GeomLerp(vec_t a, vec_t lerp, vec_t b)
+{
+       if(a == 0)
+       {
+               if(lerp < 1)
+                       return 0;
+               else
+                       return b;
+       }
+       if(b == 0)
+       {
+               if(lerp > 0)
+                       return 0;
+               else
+                       return a;
+       }
+       return a * pow(fabs(b / a), lerp);
+}
+
 void CL_ClientMovement_Physics_CPM_PM_Aircontrol(cl_clientmovement_state_t *s, vec3_t wishdir, vec_t wishspeed)
 {
        vec_t zspeed, speed, dot, k;
@@ -1353,7 +1372,7 @@ void CL_ClientMovement_Physics_Walk(cl_clientmovement_state_t *s)
                if (s->waterjumptime <= 0)
                {
                        // apply air speed limit
-                       vec_t accel, wishspeed0, wishspeed2, accelqw;
+                       vec_t accel, wishspeed0, wishspeed2, accelqw, strafity;
                        qboolean accelerating;
 
                        accelqw = cl.movevars_airaccel_qw;
@@ -1370,9 +1389,17 @@ void CL_ClientMovement_Physics_Walk(cl_clientmovement_state_t *s)
                        if(cl.movevars_airstopaccelerate != 0)
                                if(DotProduct(s->velocity, wishdir) < 0)
                                        accel = cl.movevars_airstopaccelerate;
-                       // this doesn't play well with analog input, but can't really be
-                       // fixed like the AirControl can. So, don't set the maxairstrafe*
-                       // cvars when you want to support analog input.
+                       strafity = CL_IsMoveInDirection(s->cmd.forwardmove, s->cmd.sidemove, -90) + CL_IsMoveInDirection(s->cmd.forwardmove, s->cmd.sidemove, +90); // if one is nonzero, other is always zero
+                       if(cl.movevars_maxairstrafespeed)
+                               wishspeed = min(wishspeed, CL_GeomLerp(cl.movevars_maxairspeed, strafity, cl.movevars_maxairstrafespeed));
+                       if(cl.movevars_airstrafeaccelerate)
+                               accel = CL_GeomLerp(cl.movevars_airaccelerate, strafity, cl.movevars_airstrafeaccelerate);
+                       if(cl.movevars_airstrafeaccel_qw)
+                               accelqw =
+                                       (((strafity > 0.5 ? cl.movevars_airstrafeaccel_qw : cl.movevars_airaccel_qw) >= 0) ? +1 : -1)
+                                       *
+                                       (1 - CL_GeomLerp(1 - fabs(cl.movevars_airaccel_qw), strafity, 1 - fabs(cl.movevars_airstrafeaccel_qw)));
+
                        if(s->cmd.forwardmove == 0 && s->cmd.sidemove != 0)
                        {
                                if(cl.movevars_maxairstrafespeed)
@@ -1461,6 +1488,7 @@ void CL_UpdateMoveVars(void)
                cl.movevars_airstopaccelerate = cl.statsf[STAT_MOVEVARS_AIRSTOPACCELERATE];
                cl.movevars_airstrafeaccelerate = cl.statsf[STAT_MOVEVARS_AIRSTRAFEACCELERATE];
                cl.movevars_maxairstrafespeed = cl.statsf[STAT_MOVEVARS_MAXAIRSTRAFESPEED];
+               cl.movevars_airstrafeaccel_qw = cl.statsf[STAT_MOVEVARS_AIRSTRAFEACCEL_QW];
                cl.movevars_aircontrol = cl.statsf[STAT_MOVEVARS_AIRCONTROL];
                cl.movevars_aircontrol_power = cl.statsf[STAT_MOVEVARS_AIRCONTROL_POWER];
                cl.movevars_warsowbunny_airforwardaccel = cl.statsf[STAT_MOVEVARS_WARSOWBUNNY_AIRFORWARDACCEL];
@@ -1494,6 +1522,7 @@ void CL_UpdateMoveVars(void)
                cl.movevars_airstopaccelerate = 0;
                cl.movevars_airstrafeaccelerate = 0;
                cl.movevars_maxairstrafespeed = 0;
+               cl.movevars_airstrafeaccel_qw = 0;
                cl.movevars_aircontrol = 0;
                cl.movevars_aircontrol_power = 2;
                cl.movevars_warsowbunny_airforwardaccel = 0;