Added: New sidedef flag "sdf_middle_stretch". Normally, height of the…

… middle surface on twosided linedefs is clipped to that of the material used on it. If this flag is set, this behaviour is disabled (instead, the surface will stretch from floor to ceiling). This flag can be set via DMU and subsequently XG, using the ltc_wall_texture/ltc_wall_material class.

Implemented for jDoom64. When loading a DOOM64 format map, this flag will be set for all sidedefs automatically in line with the original game behavior.

doomsday/engine/api/dd_share.h

@@ -613,6 +613,7 @@ enum /* Do not change the numerical values of the constants! */
 #define SDF_BLENDMIDTOTOP       0x0002
 #define SDF_BLENDMIDTOBOTTOM    0x0004
 #define SDF_BLENDBOTTOMTOMID    0x0008
+#define SDF_MIDDLE_STRETCH      0x0010 // Stretch the middle surface to reach from floor to ceiling.
 
 // Surface flags:
 // For use with P_Set/Get(DMU_SURFACE, n, DMU_FLAGS).

doomsday/engine/defs/flags.ded

@@ -85,6 +85,7 @@ Flag { ID = "sdf_fade_top_mid";  Value = 0x1; }
 Flag { ID = "sdf_fade_mid_top";  Value = 0x2; }
 Flag { ID = "sdf_fade_mid_bottom";  Value = 0x4; }
 Flag { ID = "sdf_fade_bottom_mid";  Value = 0x8; }
+Flag { ID = "sdf_middle_stretch"; Value = 0x10; }
 
 # Models
 Flag { ID = "df_fullbright"; Value = 0x1; }

doomsday/engine/portable/src/rend_main.c

@@ -417,6 +417,9 @@ boolean Rend_DoesMidTextureFillGap(linedef_t *line, int backside)
                 float               openTop[2], matTop[2];
                 float               openBottom[2], matBottom[2];
 
+                if(side->flags & SDF_MIDDLE_STRETCH)
+                    return true;
+
                 openTop[0] = openTop[1] = matTop[0] = matTop[1] =
                     MIN_OF(back->SP_ceilvisheight, front->SP_ceilvisheight);
                 openBottom[0] = openBottom[1] = matBottom[0] = matBottom[1] =
@@ -1651,7 +1654,7 @@ static boolean renderWorldPoly(rvertex_t* rvertices, uint numVertices,
         rvertex_t           origVerts[4];
         rcolor_t            origColors[4];
         rtexcoord_t         origTexCoords[4];
-
+        
         /**
          * Need to swap indices around into fans set the position
          * of the division vertices, interpolate texcoords and
@@ -2479,7 +2482,8 @@ static boolean Rend_RenderWallSeg(subsector_t* ssec, seg_t* seg)
         }
 
         mat = surface->material->current;
-        if(Rend_MidMaterialPos
+        if((side->flags & SDF_MIDDLE_STRETCH) ||
+           Rend_MidMaterialPos
            (&vL_ZBottom, &vR_ZBottom, &vL_ZTop, &vR_ZTop,
            &texOffset[VY], surface->visOffset[VY], mat->height,
             (ldef->flags & DDLF_DONTPEGBOTTOM)? true : false))

doomsday/plugins/wadmapconverter/src/load.c

@@ -1426,7 +1426,7 @@ boolean TransferMap(void)
         {
             frontIdx =
                 MPE_SidedefCreate(front->sector,
-                                  (map->format == MF_DOOM64? SDF_MIDDLE_MATERIAL_TILED : 0),
+                                  (map->format == MF_DOOM64? SDF_MIDDLE_STRETCH : 0),
                                   front->topMaterial->num,
                                   front->offset[VX], front->offset[VY], 1, 1, 1,
                                   front->middleMaterial->num,
@@ -1440,7 +1440,7 @@ boolean TransferMap(void)
         {
             backIdx =
                 MPE_SidedefCreate(back->sector,
-                                  (map->format == MF_DOOM64? SDF_MIDDLE_MATERIAL_TILED : 0),
+                                  (map->format == MF_DOOM64? SDF_MIDDLE_STRETCH : 0),
                                   back->topMaterial->num,
                                   back->offset[VX], back->offset[VY], 1, 1, 1,
                                   back->middleMaterial->num,