Add gates to the Red Alert mod.

mods/ra/rules/defaults.yaml

@@ -511,6 +511,32 @@
 			TopLeft: -512, -512
 			BottomRight: 512, 512
 
+^Gate:
+	Inherits: ^BasicBuilding
+	Valued:
+		Cost: 250
+	Health:
+		HP: 350
+	Armor:
+		Type: Heavy
+	LineBuildNode:
+		Types: concrete, gate
+	-Building:
+	-WithSpriteBody:
+	WithGateSpriteBody:
+	Power:
+	CanPowerDown:
+	Tooltip:
+		Name: Gate
+		Description: Automated barrier that opens for allied units.
+	Gate:
+		Adjacent: 4
+		BlocksProjectilesHeight: 0
+		BuildSounds: place2.aud
+		OpeningSound: cashturn.aud
+		ClosingSound: cashturn.aud
+		TerrainTypes: Clear, Road
+
 ^TechBuilding:
 	Inherits: ^BasicBuilding
 	Health:

mods/ra/rules/structures.yaml

@@ -1666,6 +1666,40 @@ BRIK:
 	WithWallSpriteBody:
 		Type: concrete
 
+VGATE:
+	Inherits: ^Gate
+	Gate:
+		Footprint: x x x
+		Dimensions: 1,3
+	WithGateSpriteBody:
+		WallConnections: 0,-1, 0,3
+	LineBuildNode:
+		Connections: 0,-1, 0,1
+	Tooltip:
+		Name: Vertical Gate
+
+HGATE:
+	Inherits: ^Gate
+	Gate:
+		Footprint: xxx
+		Dimensions: 3,1
+	WithGateSpriteBody:
+		WallConnections: -1,0, 3,0
+	LineBuildNode:
+		Connections: -1,0, 1,0
+	Tooltip:
+		Name: Horizontal Gate
+	RenderSprites:
+		Image: agate
+		FactionImages:
+			allies: agate
+			england: agate
+			france: agate
+			germany: agate
+			soviet: sgate
+			russia: sgate
+			ukraine: sgate
+
 CYCL:
 	Inherits: ^Wall
 	Tooltip:

mods/ra/sequences/structures.yaml

@@ -598,6 +598,33 @@ brik:
 		Length: 16
 	icon: brikicon
 
+vgate:
+	make:
+		Length: 7
+	idle:
+		Frames: 6, 5, 4, 3, 2, 1, 0
+		Length: 7
+		ZOffset: -1c511
+	damaged-idle:
+		Frames: 13, 12, 11, 10, 9, 8, 7
+		Length: 7
+		ZOffset: -1c511
+
+agate:
+	make:
+		Length: 7
+	idle:
+		Frames: 6, 5, 4, 3, 2, 1, 0
+		Length: 7
+		ZOffset: -1c511
+	damaged-idle:
+		Frames: 13, 12, 11, 10, 9, 8, 7
+		Length: 7
+		ZOffset: -1c511
+
+sgate:
+	Inherits: agate
+
 sbag:
 	idle:
 		Length: 16