Add linedef executor for modifying (as opposed to copying) a sector's light level

extras/conf/udb/Includes/SRB222_linedefs.cfg

@@ -762,7 +762,7 @@ doom
 		}
 		402
 		{
-			title = "Set Tagged Sector's Light Level";
+			title = "Copy Light Level to Tagged Sectors";
 			prefix = "(402)";
 		}
 		408
@@ -815,6 +815,11 @@ doom
 			title = "Change Plane Scroller Direction";
 			prefix = "(435)";
 		}
+		467
+		{
+			title = "Set Tagged Sector's Light Level";
+			prefix = "(467)";
+		}
 	}
 
 	linedefexecplane
@@ -2513,7 +2518,7 @@ udmf
 
 		402
 		{
-			title = "Copy Light Level";
+			title = "Copy Light Level to Tagged Sectors";
 			prefix = "(402)";
 			arg0
 			{
@@ -2700,6 +2705,38 @@ udmf
 				title = "Speed";
 			}
 		}
+
+		467
+		{
+			title = "Set Tagged Sector's Light Level";
+			prefix = "(467)";
+			arg0
+			{
+				title = "Target sector tag";
+				type = 13;
+			}
+			arg1
+			{
+				title = "Light level";
+			}
+			arg2
+			{
+				title = "Affected area";
+				type = 11;
+				enum
+				{
+					0 = "Sector";
+					1 = "Floor";
+					2 = "Ceiling";
+				}
+			}
+			arg3
+			{
+				title = "Set/Add?";
+				type = 11;
+				enum = "setadd";
+			}
+		}
 	}
 
 	linedefexecplane

src/p_setup.c

@@ -3826,6 +3826,12 @@ static void P_ConvertBinaryMap(void)
 		case 456: //Stop fading colormap
 			lines[i].args[0] = Tag_FGet(&lines[i].tags);
 			break;
+		case 467: //Set light level
+			lines[i].args[0] = tag;
+			lines[i].args[1] = sides[lines[i].sidenum[0]].textureoffset >> FRACBITS;
+			lines[i].args[2] = TML_SECTOR;
+			lines[i].args[3] = !!(lines[i].flags & ML_EFFECT3);
+			break;
 		case 480: //Polyobject - door slide
 		case 481: //Polyobject - door move
 			lines[i].args[0] = tag;

src/p_spec.c

@@ -3683,6 +3683,45 @@ static void P_ProcessLineSpecial(line_t *line, mobj_t *mo, sector_t *callsec)
 			}
 			break;
 
+		case 467: // Set light level
+			TAG_ITER_SECTORS(line->args[0], secnum)
+			{
+				if (sectors[secnum].lightingdata)
+				{
+					// Stop any lighting effects going on in the sector
+					P_RemoveThinker(&((elevator_t *)sectors[secnum].lightingdata)->thinker);
+					sectors[secnum].lightingdata = NULL;
+
+					// No, it's not an elevator_t, but any struct with a thinker_t named
+					// 'thinker' at the beginning will do here. (We don't know what it
+					// actually is: could be lightlevel_t, fireflicker_t, glow_t, etc.)
+				}
+
+				if (line->args[2] == TML_FLOOR)
+				{
+					if (line->args[3])
+						sectors[secnum].floorlightlevel += line->args[1];
+					else
+						sectors[secnum].floorlightlevel = line->args[1];
+				}
+				else if (line->args[2] == TML_CEILING)
+				{
+					if (line->args[3])
+						sectors[secnum].ceilinglightlevel += line->args[1];
+					else
+						sectors[secnum].ceilinglightlevel = line->args[1];
+				}
+				else
+				{
+					if (line->args[3])
+						sectors[secnum].lightlevel += line->args[1];
+					else
+						sectors[secnum].lightlevel = line->args[1];
+					sectors[secnum].lightlevel = max(0, min(255, sectors[secnum].lightlevel));
+				}
+			}
+			break;
+
 		case 480: // Polyobj_DoorSlide
 		case 481: // Polyobj_DoorSwing
 			PolyDoor(line);

src/p_spec.h

@@ -112,6 +112,13 @@ typedef enum
 	TMP_BOTH = 2,
 } textmapplanes_t;
 
+typedef enum
+{
+	TML_SECTOR  = 0,
+	TML_FLOOR   = 1,
+	TML_CEILING = 2,
+} textmaplightareas_t;
+
 typedef enum
 {
 	TMLC_NOSECTOR  = 1,