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-rw-r--r--src/newgrf_spritegroup.cpp7
-rw-r--r--src/newgrf_spritegroup.h14
2 files changed, 13 insertions, 8 deletions
diff --git a/src/newgrf_spritegroup.cpp b/src/newgrf_spritegroup.cpp
index 2d0ca71bb..74cba113b 100644
--- a/src/newgrf_spritegroup.cpp
+++ b/src/newgrf_spritegroup.cpp
@@ -142,13 +142,16 @@ const SpriteGroup *DeterministicSpriteGroup::Resolve(ResolverObject *object) con
/* Try to get the variable. We shall assume it is available, unless told otherwise. */
bool available = true;
if (adjust->variable == 0x7E) {
- ResolverObject subobject = *object;
- const SpriteGroup *subgroup = SpriteGroup::Resolve(adjust->subroutine, &subobject);
+ const SpriteGroup *subgroup = SpriteGroup::Resolve(adjust->subroutine, object);
if (subgroup == NULL) {
value = CALLBACK_FAILED;
} else {
value = subgroup->GetCallbackResult();
}
+
+ /* Reset values to current scope.
+ * Note: 'last_value' and 'reseed' are shared between the main chain and the procedure */
+ object->scope = this->var_scope;
} else {
value = GetVariable(object, adjust->variable, adjust->parameter, &available);
}
diff --git a/src/newgrf_spritegroup.h b/src/newgrf_spritegroup.h
index 0382de7c6..f10574bdd 100644
--- a/src/newgrf_spritegroup.h
+++ b/src/newgrf_spritegroup.h
@@ -291,14 +291,16 @@ struct ResolverObject {
uint32 callback_param2;
byte trigger;
- byte count;
- uint32 last_value;
- uint32 reseed;
- VarSpriteGroupScope scope;
- BaseStorageArray *psa; ///< The persistent storage array of this resolved object.
+ uint32 last_value; ///< Result of most recent DeterministicSpriteGroup (including procedure calls)
+ uint32 reseed; ///< Collects bits to rerandomise while triggering triggers.
+
+ VarSpriteGroupScope scope; ///< Scope of currently resolved DeterministicSpriteGroup resp. RandomizedSpriteGroup
+ byte count; ///< Additional scope for RandomizedSpriteGroup
+
+ BaseStorageArray *psa; ///< The persistent storage array of this resolved object.
- const GRFFile *grffile; ///< GRFFile the resolved SpriteGroup belongs to
+ const GRFFile *grffile; ///< GRFFile the resolved SpriteGroup belongs to
union {
struct {