Copy some stuff from the server side implementation of QC physics

[xonotic/xonotic-data.pk3dir.git] / qcsrc / csqcmodellib / cl_player.qc

diff --git a/qcsrc/csqcmodellib/cl_player.qc b/qcsrc/csqcmodellib/cl_player.qc
index dfb72070cdecd10e02f51023135faab516d428b8..29df6e61ae119a540e7094e0e7fd0f0d7c024052 100644 (file)
--- a/qcsrc/csqcmodellib/cl_player.qc
+++ b/qcsrc/csqcmodellib/cl_player.qc
@@ -385,6 +385,20 @@ void CSQC_ClientMovement_Move(entity s)
                s.velocity = primalvelocity;
 }
 
+float IsMoveInDirection(vector mv, float angle) // key mix factor
+{
+       if(mv_x == 0 && mv_y == 0)
+               return 0; // avoid division by zero
+       angle -= RAD2DEG * atan2(mv_y, mv_x);
+       angle = remainder(angle, 360) / 45;
+       if(angle >  1)
+               return 0;
+       if(angle < -1)
+               return 0;
+       return 1 - fabs(angle);
+}
+
+// TODO: remove this and use above function
 float CSQC_IsMoveInDirection(float forward, float side, float angle)
 {
        // TODO: move to a common header
@@ -403,7 +417,7 @@ float CSQC_IsMoveInDirection(float forward, float side, float angle)
        #undef ANGLEMOD
 }
 
-float CSQC_GeomLerp(float a, float lerp, float b)
+float GeomLerp(float a, float lerp, float b)
 {
        if(a == 0)
        {
@@ -424,39 +438,42 @@ float CSQC_GeomLerp(float a, float lerp, float b)
 
 void CSQC_ClientMovement_Physics_CPM_PM_Aircontrol(entity s, vector wishdir, float wishspeed)
 {
-       float zspeed, speed, dot, k;
+       float zspeed, xyspeed, dot, k;
 
-       k = 32 * (2 * CSQC_IsMoveInDirection(input_movevalues_x, input_movevalues_y, 0) - 1);
+#if 0
+       // this doesn't play well with analog input
+       if(s.movement_x == 0 || s.movement_y != 0)
+               return; // can't control movement if not moving forward or backward
+       k = 32;
+#else
+       k = 32 * (2 * IsMoveInDirection(input_movevalues, 0) - 1);
        if(k <= 0)
                return;
+#endif
 
        k *= bound(0, wishspeed / getstatf(STAT_MOVEVARS_MAXAIRSPEED), 1);
 
        zspeed = s.velocity_z;
        s.velocity_z = 0;
-       speed = vlen(s.velocity);
-       if (speed) s.velocity /= speed;
+       xyspeed = vlen(s.velocity); s.velocity = normalize(s.velocity);
 
-       dot = dotproduct(s.velocity, wishdir);
+       dot = s.velocity * wishdir;
 
-       if(dot > 0) { // we can't change direction while slowing down
+       if(dot > 0) // we can't change direction while slowing down
+       {
                k *= pow(dot, getstatf(STAT_MOVEVARS_AIRCONTROL_POWER))*input_timelength;
-               speed = max(0, speed - getstatf(STAT_MOVEVARS_AIRCONTROL_PENALTY) * sqrt(max(0, 1 - dot*dot)) * k/32);
+               xyspeed = max(0, xyspeed - getstatf(STAT_MOVEVARS_AIRCONTROL_PENALTY) * sqrt(max(0, 1 - dot*dot)) * k/32);
                k *= getstatf(STAT_MOVEVARS_AIRCONTROL);
-               s.velocity = speed * s.velocity + k * wishdir;
-               s.velocity = normalize(s.velocity);
+               s.velocity = normalize(s.velocity * xyspeed + wishdir * k);
        }
 
-       s.velocity *= speed;
+       s.velocity = s.velocity * xyspeed;
        s.velocity_z = zspeed;
 }
 
 float CSQC_ClientMovement_Physics_AdjustAirAccelQW(float accelqw, float factor)
 {
-       return
-               (accelqw < 0 ? -1 : +1)
-               *
-               bound(0.000001, 1 - (1 - fabs(accelqw)) * factor, 1);
+       return copysign(bound(0.000001, 1 - (1 - fabs(accelqw)) * factor, 1), accelqw);
 }
 
 void CSQC_ClientMovement_Physics_PM_Accelerate(entity s, vector wishdir, float wishspeed, float wishspeed0, float accel, float accelqw, float stretchfactor, float sidefric, float speedlimit)
@@ -707,14 +724,14 @@ void CSQC_ClientMovement_Physics_Walk(entity s)
                        }
                        strafity = CSQC_IsMoveInDirection(input_movevalues_x, input_movevalues_y, -90) + CSQC_IsMoveInDirection(input_movevalues_x, input_movevalues_y, +90); // if one is nonzero, other is always zero
                        if(getstatf(STAT_MOVEVARS_MAXAIRSTRAFESPEED))
-                               wishspeed = min(wishspeed, CSQC_GeomLerp(getstatf(STAT_MOVEVARS_MAXAIRSPEED), strafity, getstatf(STAT_MOVEVARS_MAXAIRSTRAFESPEED)));
+                               wishspeed = min(wishspeed, GeomLerp(getstatf(STAT_MOVEVARS_MAXAIRSPEED), strafity, getstatf(STAT_MOVEVARS_MAXAIRSTRAFESPEED)));
                        if(getstatf(STAT_MOVEVARS_AIRSTRAFEACCELERATE))
-                               accel = CSQC_GeomLerp(getstatf(STAT_MOVEVARS_AIRACCELERATE), strafity, getstatf(STAT_MOVEVARS_AIRSTRAFEACCELERATE));
+                               accel = GeomLerp(getstatf(STAT_MOVEVARS_AIRACCELERATE), strafity, getstatf(STAT_MOVEVARS_AIRSTRAFEACCELERATE));
                        if(getstatf(STAT_MOVEVARS_AIRSTRAFEACCEL_QW))
                                accelqw =
                                        (((strafity > 0.5 ? getstatf(STAT_MOVEVARS_AIRSTRAFEACCEL_QW) : getstatf(STAT_MOVEVARS_AIRACCEL_QW)) >= 0) ? +1 : -1)
                                        *
-                                       (1 - CSQC_GeomLerp(1 - fabs(getstatf(STAT_MOVEVARS_AIRACCEL_QW)), strafity, 1 - fabs(getstatf(STAT_MOVEVARS_AIRSTRAFEACCEL_QW))));
+                                       (1 - GeomLerp(1 - fabs(getstatf(STAT_MOVEVARS_AIRACCEL_QW)), strafity, 1 - fabs(getstatf(STAT_MOVEVARS_AIRSTRAFEACCEL_QW))));
                        // !CPM
 
                        if(getstatf(STAT_MOVEVARS_WARSOWBUNNY_TURNACCEL) && accelerating && input_movevalues_y == 0 && input_movevalues_x != 0)