Let level darkness be changed per splitscreen, use player_t variables

Modifies netsave.

- Add darkness_start, darkness_end to player_t

src/d_player.h

@@ -982,6 +982,9 @@ struct player_t
 	icecubevars_t icecube;
 
 	level_tally_t tally;
+
+	tic_t darkness_start;
+	tic_t darkness_end;
 };
 
 // WARNING FOR ANYONE ABOUT TO ADD SOMETHING TO THE PLAYER STRUCT, G_PlayerReborn WANTS YOU TO SUFFER

src/doomstat.h

@@ -807,7 +807,7 @@ extern exitcondition_t g_exit;
 extern struct darkness_t
 {
 	tic_t start, end;
-	fixed_t value;
+	fixed_t value[MAXSPLITSCREENPLAYERS];
 } g_darkness;
 
 #define DEFAULT_GRAVITY (4*FRACUNIT/5)

src/p_saveg.c

@@ -787,6 +787,10 @@ static void P_NetArchivePlayers(savebuffer_t *save)
 		WRITEUINT8(save->p, players[i].icecube.wiggle);
 		WRITEUINT32(save->p, players[i].icecube.frozenat);
 		WRITEUINT8(save->p, players[i].icecube.shaketimer);
+
+		// darkness
+		WRITEUINT32(save->p, players[i].darkness_start);
+		WRITEUINT32(save->p, players[i].darkness_end);
 	}
 
 	TracyCZoneEnd(__zone);
@@ -1358,6 +1362,10 @@ static void P_NetUnArchivePlayers(savebuffer_t *save)
 		players[i].icecube.frozenat = READUINT32(save->p);
 		players[i].icecube.shaketimer = READUINT8(save->p);
 
+		// darkness
+		players[i].darkness_start = READUINT32(save->p);
+		players[i].darkness_end = READUINT32(save->p);
+
 		//players[i].viewheight = P_GetPlayerViewHeight(players[i]); // scale cannot be factored in at this point
 	}
 

src/p_tick.c

@@ -768,6 +768,43 @@ void P_RunChaseCameras(void)
 	}
 }
 
+static fixed_t P_GetDarkness(tic_t start, tic_t end)
+{
+	if (leveltime <= end)
+	{
+		tic_t fade = end - DARKNESS_FADE_TIME;
+		tic_t t;
+
+		if (leveltime < fade) // dark or darkening
+		{
+			t = leveltime - start;
+			t = min(t, DARKNESS_FADE_TIME);
+		}
+		else // lightening
+		{
+			t = end - leveltime;
+		}
+
+		return Easing_Linear((t * FRACUNIT) / DARKNESS_FADE_TIME, 0, FRACUNIT/7);
+	}
+
+	return 0;
+}
+
+static void P_TickDarkness(void)
+{
+	const fixed_t globalValue = P_GetDarkness(g_darkness.start, g_darkness.end);
+	UINT8 i;
+
+	for (i = 0; i <= r_splitscreen; ++i)
+	{
+		const player_t *p = &players[displayplayers[i]];
+		fixed_t value = P_GetDarkness(p->darkness_start, p->darkness_end);
+
+		g_darkness.value[i] = value ? value : globalValue;
+	}
+}
+
 //
 // P_Ticker
 //
@@ -1046,27 +1083,7 @@ void P_Ticker(boolean run)
 		if (racecountdown > 1)
 			racecountdown--;
 
-		if (leveltime <= g_darkness.end)
-		{
-			tic_t fade = g_darkness.end - DARKNESS_FADE_TIME;
-			tic_t t;
-
-			if (leveltime < fade) // dark or darkening
-			{
-				t = leveltime - g_darkness.start;
-				t = min(t, DARKNESS_FADE_TIME);
-			}
-			else // lightening
-			{
-				t = g_darkness.end - leveltime;
-			}
-
-			g_darkness.value = Easing_Linear((t * FRACUNIT) / DARKNESS_FADE_TIME, 0, FRACUNIT/7);
-		}
-		else // light
-		{
-			g_darkness.value = 0;
-		}
+		P_TickDarkness();
 
 		if (exitcountdown >= 1)
 		{

src/r_debug.cpp

@@ -18,6 +18,7 @@
 #include "i_time.h"
 #include "m_fixed.h"
 #include "r_draw.h"
+#include "r_fps.h"
 #include "r_main.h"
 #include "g_game.h"
 
@@ -43,7 +44,7 @@ INT32 R_AdjustLightLevel(INT32 light)
 
 	if (!debugrender_highlight && cv_debugrender_contrast.value == 0)
 	{
-		const fixed_t darken = FixedMul(FixedMul(g_darkness.value, mapheaderinfo[gamemap-1]->darkness), kRange);
+		const fixed_t darken = FixedMul(FixedMul(g_darkness.value[R_GetViewNumber()], mapheaderinfo[gamemap-1]->darkness), kRange);
 		return std::clamp((light * FRACUNIT) - darken, 0, kRange) / FRACUNIT;
 	}