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-rw-r--r--src/newgrf_callbacks.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/newgrf_callbacks.h b/src/newgrf_callbacks.h
index 05327ea88..20477bd3e 100644
--- a/src/newgrf_callbacks.h
+++ b/src/newgrf_callbacks.h
@@ -12,6 +12,9 @@
* Names are formatted as CBID_<CLASS>_<CALLBACK>
*/
enum CallbackID {
+ /* Set when calling a randomizing trigger (almost undocumented) */
+ CBID_RANDOM_TRIGGER = 0x01,
+
/* Powered wagons, if the result is lower as 0x40 then the wagon is powered
* @todo : interpret the rest of the result, aka "visual effects" */
CBID_TRAIN_WAGON_POWER = 0x10,