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Add NewGRF bridge property to prevent town or AI/GS building bridge type

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This commit is contained in:
Jonathan G Rennison
2020-10-14 19:53:06 +01:00
parent 0c0c6c7531
commit 14adcbac80
7 changed files with 41 additions and 3 deletions
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12
src/tunnelbridge_cmd.cpp
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@@ -274,6 +274,14 @@ CommandCost CheckBridgeAvailability(BridgeType bridge_type, uint bridge_len, DoC
return_cmd_error(STR_ERROR_BRIDGE_TOO_LONG);
}
bool MayTownBuildBridgeType(BridgeType bridge_type)
{
if (bridge_type >= MAX_BRIDGES) return false;
const BridgeSpec *b = GetBridgeSpec(bridge_type);
return !HasBit(b->ctrl_flags, BSCF_NOT_AVAILABLE_TOWN);
}
/**
* Build a Bridge
* @param end_tile end tile
@@ -283,6 +291,7 @@ CommandCost CheckBridgeAvailability(BridgeType bridge_type, uint bridge_len, DoC
* - p2 = (bit 0- 7) - bridge type (hi bh)
* - p2 = (bit 8-13) - rail type or road types.
* - p2 = (bit 15-16) - transport type.
* - p2 = (bit 17) - script command
* @param text unused
* @return the cost of this operation or an error
*/
@@ -300,6 +309,8 @@ CommandCost CmdBuildBridge(TileIndex end_tile, DoCommandFlag flags, uint32 p1, u
TransportType transport_type = Extract<TransportType, 15, 2>(p2);
bool script_cmd = HasBit(p2, 17);
/* type of bridge */
switch (transport_type) {
case TRANSPORT_ROAD:
@@ -354,6 +365,7 @@ CommandCost CmdBuildBridge(TileIndex end_tile, DoCommandFlag flags, uint32 p1, u
/* set and test bridge length, availability */
CommandCost ret = CheckBridgeAvailability(bridge_type, bridge_len, flags);
if (ret.Failed()) return ret;
if (script_cmd && HasBit(GetBridgeSpec(bridge_type)->ctrl_flags, BSCF_NOT_AVAILABLE_AI_GS)) return CMD_ERROR;
} else {
if (bridge_len > _settings_game.construction.max_bridge_length) return_cmd_error(STR_ERROR_BRIDGE_TOO_LONG);
}