cpp/openttd-patchpack/source Changeset - r3727:1785a129fadb

Changeset - r3727:1785a129fadb

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peter1138 - 19 years ago 2006-05-02 21:43:47
peter1138@openttd.org

(svn r4703) - NewGRF: add support for callback 0x1D, "can wagon be attached". This can be used to disallow freight wagons to be placed in passenger trains, along with other uses.

2 files changed with 14 insertions and 0 deletions:

newgrf_callbacks.h

train_cmd.c

0 comments (0 inline, 0 general)

newgrf_callbacks.h

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@@ @@ -25,6 +25,8 @@ enum CallbackID { @@
 	CBID_TRAIN_ARTIC_ENGINE         = 0x16,
 	CBID_TRAIN_ALLOW_WAGON_ATTACH   = 0x1D,
 	/* This callback is called from vehicle purchase lists. It returns a value to be
 	 * used as a custom string ID in the 0xD000 range. */
 	CBID_VEHICLE_ADDITIONAL_TEXT    = 0x23,

train_cmd.c

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@@ @@ -27,6 +27,7 @@ @@
 #include "train.h"
 #include "newgrf_callbacks.h"
 #include "newgrf_engine.h"
 #include "newgrf_text.h"
 #include "direction.h"
 static bool TrainCheckIfLineEnds(Vehicle *v);
@@ @@ -1076,6 +1077,17 @@ int32 CmdMoveRailVehicle(TileIndex tile, @@
 		if (flags & DC_EXEC) src->unitnumber = unit_num;
+	}
 	if (dst_head != NULL) {
 		/* Check NewGRF Callback 0x1D */
 		uint16 callback = GetVehicleCallbackParent(CBID_TRAIN_ALLOW_WAGON_ATTACH, 0, 0, dst_head->engine_type, src, dst_head);
 		if (callback != CALLBACK_FAILED) {
 			if (callback == 0xFD) return CMD_ERROR;
 			if (callback < 0xFD) {
 				StringID error = GetGRFStringID(GetEngineGRFID(dst_head->engine_type), 0xD000 + callback);
 				return_cmd_error(error);
+			}
+		}
+	}
 	/* do it? */
 	if (flags & DC_EXEC) {

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