client: render: implemented getting PVS culling radius from engine, made culling more aggressive

Author: SNMetamorph

client/render/gl_cvars.cpp

@@ -50,6 +50,7 @@ cvar_t *r_dof_change_time;
 cvar_t *r_dof_focal_length;
 cvar_t *r_dof_fstop;
 cvar_t *r_dof_debug;
+cvar_t *r_pvs_radius;
 cvar_t *r_allow_mirrors;
 cvar_t *r_allow_portals;
 cvar_t *r_allow_screens;
@@ -136,6 +137,7 @@ void R_InitializeConVars()
 	r_nocull = CVAR_GET_POINTER("r_nocull");
 	r_lockpvs = CVAR_GET_POINTER("r_lockpvs");
 	r_lockfrustum = CVAR_GET_POINTER("r_lockfrustum");
+	r_pvs_radius = CVAR_GET_POINTER("r_pvs_radius");
 	r_wireframe = CVAR_GET_POINTER("gl_wireframe");
 	r_lightmap = CVAR_GET_POINTER("r_lightmap");
 	r_decals = CVAR_GET_POINTER("r_decals");

client/render/gl_cvars.h

@@ -44,6 +44,7 @@ extern cvar_t *r_novis;
 extern cvar_t *r_nocull;
 extern cvar_t *r_lockpvs;
 extern cvar_t *r_lockfrustum;
+extern cvar_t *r_pvs_radius;
 extern cvar_t *gl_hdr;
 extern cvar_t *r_tonemap;
 extern cvar_t *r_bloom;

client/render/gl_local.h

@@ -83,7 +83,6 @@ GNU General Public License for more details.
 #define SHADOW_SIZE		4096			// atlas size
 
 #define WORLD_MATRIX	0			// must be 0 always
-#define REFPVS_RADIUS	2.0f			// PVS radius for rendering
 #define Z_NEAR		4.0f
 #define Z_NEAR_LIGHT	0.1f
 #define BACKFACE_EPSILON	0.01f

client/render/gl_rmain.cpp

@@ -182,6 +182,12 @@ const Vector gl_state_t :: GetModelOrigin( void )
 	return transform.VectorITransform( RI->view.origin );
 }
 
+float R_GetPVSRadius()
+{
+	const float defaultPvsRadius = 2.0f; // formerly REFPVS_RADIUS
+	return r_pvs_radius ? r_pvs_radius->value : defaultPvsRadius;
+}
+
 /*
 ===============
 GL_CacheState
@@ -421,7 +427,7 @@ static void R_SetupViewCache( const ref_viewpass_t *rvp )
 		if( CVAR_TO_BOOL( r_novis ) || FBitSet( RI->params, RP_DRAW_OVERVIEW ) || ( !RI->view.leaf ))
 			fullvis = true;
 
-		ENGINE_SET_PVS( RI->view.pvspoint, REFPVS_RADIUS, RI->view.pvsarray, mergevis, fullvis );
+		ENGINE_SET_PVS( RI->view.pvspoint, R_GetPVSRadius(), RI->view.pvsarray, mergevis, fullvis);
 		SetBits( RI->view.changed, RC_PVS_CHANGED );
 	}
 

client/render/gl_shadows.cpp

@@ -364,8 +364,9 @@ static void R_ShadowPassSetupViewCache( CDynLight *pl, int split = 0 )
 	RI->view.worldMatrix.CopyToArray( RI->glstate.modelviewMatrix );
 
 	// TODO optimize it with caching last view leaf
+	const float pvsCullingRadius = 2.0f; // made it larger than default, to avoid disappearing shadows
 	RI->view.pvspoint = pl->origin;
-	ENGINE_SET_PVS( RI->view.pvspoint, REFPVS_RADIUS, RI->view.pvsarray, false, true ); 
+	ENGINE_SET_PVS( RI->view.pvspoint, pvsCullingRadius, RI->view.pvsarray, false, true ); 
 	R_MarkWorldVisibleFaces( worldmodel );
 
 	// add all studio models, mark visible bmodels