- fixed interpolation issues with sector objects in SW.

SO's vertex interpolation does not use the common framework so it got missed by the sector retriangulation checks.
We need to check two wall positions as well to make sure that sector movement is properly detected.

source/core/intvec.h

@@ -18,6 +18,7 @@ struct vec2_t
     vec2_t operator-(const vec2_t& other) const { return { x - other.x, y - other.y }; }
     vec2_t& operator+=(const vec2_t& other) { x += other.x; y += other.y; return *this; };
     vec2_t& operator-=(const vec2_t& other) { x -= other.x; y -= other.y; return *this; };
+    bool operator == (const vec2_t& other) const { return x == other.x && y == other.y; };
 };
 
 struct vec3_t

source/core/sectorgeometry.cpp

@@ -304,6 +304,8 @@ void SectorGeometry::ValidateSector(unsigned int secnum, int plane)
 			sec->floorxpan_ == compare->floorxpan_ &&
 			sec->floorypan_ == compare->floorypan_ &&
 			sec->floorz == compare->floorz &&
+			wall[sec->wallptr].pos == data[secnum].poscompare &&
+			wall[wall[sec->wallptr].point2].pos == data[secnum].poscompare &&
 			!(sec->dirty & 1) && data[secnum].planes[plane].vertices.Size() ) return;
 
 		sec->dirty &= ~1;
@@ -316,10 +318,13 @@ void SectorGeometry::ValidateSector(unsigned int secnum, int plane)
 			sec->ceilingxpan_ == compare->ceilingxpan_ &&
 			sec->ceilingypan_ == compare->ceilingypan_ &&
 			sec->ceilingz == compare->ceilingz &&
+			wall[wall[sec->wallptr].point2].pos == data[secnum].poscompare &&
 			!(sec->dirty & 2) && data[secnum].planes[plane].vertices.Size()) return;
 
 		sec->dirty &= ~2;
 	}
 	*compare = *sec;
+	data[secnum].poscompare == wall[sec->wallptr].pos;
+	data[secnum].poscompare2 == wall[wall[sec->wallptr].point2].pos;
 	MakeVertices(secnum, plane);
 }

source/core/sectorgeometry.h

@@ -15,6 +15,8 @@ struct SectorGeometryData
 {
 	SectorGeometryPlane planes[2];
 	sectortype compare{};
+	vec2_t poscompare{ };
+	vec2_t poscompare2{ };
 };
 
 class SectorGeometry