Frosch: fix link

2020-11-13T13:03:11Z

fix link

← Older revision		Revision as of 13:03, 13 November 2020
Line 3:		Line 3:
	* Sound Effects		* Sound Effects
	* Signals		* Signals
	have no regular Action2 to assign graphics. However, Action2 is still needed to make [[~~Callback Failed~~ \| callbacks fail]].		have no regular Action2 to assign graphics. However, Action2 is still needed to make [[Callbacks#Introduction \| callbacks fail]].

	== Syntax ==		== Syntax ==

Frosch: callback failure for signals and sound effects

2011-06-19T17:54:51Z

callback failure for signals and sound effects

New page

== Introduction ==
The features
* Sound Effects
* Signals
have no regular Action2 to assign graphics. However, Action2 is still needed to make [[Callback Failed | callbacks fail]].

== Syntax ==
<Sprite-number> * <Length> 01 <feature> 01 00
<Sprite-number> * <Length> 02 <feature> <set-id> 01 00 00 00
This syntax consists of both an [[Action1]] and the actual [[Action2]]. See the detailed description below.

{|
!Element!![[GRFActionsDetailed|Size]]!!Description
|-
|<Sprite-number>||dec||A sequential sprite number
|-
|<length>||dec||The total number of bytes used in this action
|-
|<set-id>||B||What set-ID this action2 defines
|}

== Description ==

The syntax to use is the syntax of the regular [[Action2]] referencing Action1 spritesets. However:
* Every Action2 must reference at least one spriteset, so we must also define one via [[Action1]].
* Every Action1 must define at least one spriteset, but spritesets may contain zero sprites.

Above syntax specifies two pseudo sprites. First an [[Action1]] defining 1 spriteset with 0 sprites, then the [[Action2]] referencing only that single spriteset.

=== Sprite-number ===

This is just the number you are at.

=== Length ===

Count the number of bytes in this action.

=== set-id ===

This defines the ID of the current action 2. This ID will later be referred to by [[Action3|action 3]], or a variational/random action 2.

You can reuse action 2 IDs, and there's no restriction on the order in which they are defined.

Action2/Only Callback Failure - Revision history

Frosch: fix link

Frosch: callback failure for signals and sound effects