Fix cv_glshearing 2 in first person

src/r_main.c

@@ -1074,15 +1074,22 @@ subsector_t *R_PointInSubsectorOrNull(fixed_t x, fixed_t y)
 // recalc necessary stuff for mouseaiming
 // slopes are already calculated for the full possible view (which is 4*viewheight).
 // 18/08/18: (No it's actually 16*viewheight, thanks Jimita for finding this out)
-static void R_SetupFreelook(void)
+static void R_SetupFreelook(player_t *player, boolean skybox)
 {
 	INT32 dy = 0;
 
+#ifndef HWRENDER
+	(void)player;
+	(void)skybox;
+#endif
+
 	// clip it in the case we are looking a hardware 90 degrees full aiming
 	// (lmps, network and use F12...)
 	if (rendermode == render_soft
 #ifdef HWRENDER
-		|| cv_glshearing.value
+		|| (rendermode == render_opengl
+			&& (cv_glshearing.value == 1
+			|| (cv_glshearing.value == 2 && R_IsViewpointThirdPerson(player, skybox))))
 #endif
 		)
 	{
@@ -1203,7 +1210,7 @@ void R_SetupFrame(player_t *player)
 	viewsin = FINESINE(viewangle>>ANGLETOFINESHIFT);
 	viewcos = FINECOSINE(viewangle>>ANGLETOFINESHIFT);
 
-	R_SetupFreelook();
+	R_SetupFreelook(player, false);
 }
 
 void R_SkyboxFrame(player_t *player)
@@ -1340,7 +1347,7 @@ void R_SkyboxFrame(player_t *player)
 	viewsin = FINESINE(viewangle>>ANGLETOFINESHIFT);
 	viewcos = FINECOSINE(viewangle>>ANGLETOFINESHIFT);
 
-	R_SetupFreelook();
+	R_SetupFreelook(player, true);
 }
 
 boolean R_ViewpointHasChasecam(player_t *player)