Callback: Ambient sound effects - Revision history

Glx at 00:25, 29 October 2025

2025-10-29T00:25:11Z

← Older revision		Revision as of 00:25, 29 October 2025
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	\|}		\|}

	This callback must be enabled by bit 4 in [[~~ActionD~~#Misc ~~GRF Features 9E~~\|action D var 9E]].		This callback must be enabled by bit 4 in [[GlobalVariables#Misc._GRF_Features_.281E_.2F_9E.29\|action D var 9E]].
	[[Category:Callbacks]]		[[Category:Callbacks]]

Frosch: use new grf templates

2012-04-01T13:32:59Z

use new grf templates

← Older revision		Revision as of 13:32, 1 April 2012
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	To decide whether to play a sound, and what sound to play, Var.Action 2 variable 10 holds the following information:		To decide whether to play a sound, and what sound to play, Var.Action 2 variable 10 holds the following information:
	* {{~~grf~~\|7}} For GRF version 7 and below: THRRxxxt		* {{grfTill\|7}} For GRF version 7 and below: THRRxxxt
	* {{~~grf~~\|8}} For GRF version 8 and above: xTHHRRtt		* {{grfFrom\|8}} For GRF version 8 and above: xTHHRRtt

	{\| \|-		{\| \|-
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	\|-		\|-
	\|HH\|\|		\|HH\|\|
	{{~~grf~~\|7}} Height of north corner of tile (multiple of 8)<br/>		{{grfTill\|7}} Height of north corner of tile (multiple of 8)<br/>
	{{~~grf~~\|8}} Height of lowest corner of tile (multiple of 1)		{{grfFrom\|8}} Height of lowest corner of tile (multiple of 1)
	\|-		\|-
	\|RR\|\|8 random bits		\|RR\|\|8 random bits
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	\|tt\|\|		\|tt\|\|
	* Bits 0..2: Terrain type: 0 normal (grass), 1 desert, 2 rainforest, 4 on or above snowline.		* Bits 0..2: Terrain type: 0 normal (grass), 1 desert, 2 rainforest, 4 on or above snowline.
	* Bits 3..5: {{~~grf~~\|8}} Water class: 0 - undefined / land; 1 - sea; 2 - canal; 3 - river.		* Bits 3..5: {{grfFrom\|8}} Water class: 0 - undefined / land; 1 - sea; 2 - canal; 3 - river.
	\|}		\|}

Frosch: grf version 8

2011-11-08T20:35:47Z

grf version 8

← Older revision		Revision as of 20:35, 8 November 2011
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	The 15-bit return value is the sound effect number. Values from 0 to 72 (dec) are TTD's built-in sound effects, values beyond that refer to the sounds from [[Action11\|Action 11]].		The 15-bit return value is the sound effect number. Values from 0 to 72 (dec) are TTD's built-in sound effects, values beyond that refer to the sounds from [[Action11\|Action 11]].

	To decide whether to play a sound, and what sound to play, Var.Action 2 variable 10 holds the following information: ~~THRRxxxt~~		To decide whether to play a sound, and what sound to play, Var.Action 2 variable 10 holds the following information:
			* {{grf\|7}} For GRF version 7 and below: THRRxxxt
			* {{grf\|8}} For GRF version 8 and above: xTHHRRtt

	{\| \|-		{\| \|-
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	\|T\|\|Tile class, 0=bare land, 4=trees, 6=water		\|T\|\|Tile class, 0=bare land, 4=trees, 6=water
	\|-		\|-
			\|HH\|\|
	\|~~H\|\|~~Height of north corner of tile		{{grf\|7}} Height of north corner of tile (multiple of 8)<br/>
			{{grf\|8}} Height of lowest corner of tile (multiple of 1)
	\|-		\|-
	\|RR\|\|8 random bits		\|RR\|\|8 random bits
Line 18:		Line 22:
	\|xxx\|\|Reserved		\|xxx\|\|Reserved
	\|-		\|-
			\|tt\|\|
	~~\|t\|\|~~Terrain type; ~~ ~~0 normal (grass), 1 desert, 2 rainforest, 4 on or above snowline		* Bits 0..2: Terrain type: 0 normal (grass), 1 desert, 2 rainforest, 4 on or above snowline.
			* Bits 3..5: {{grf\|8}} Water class: 0 - undefined / land; 1 - sea; 2 - canal; 3 - river.
	\|}		\|}

Pm-bot: Create a separate page for each callback

2011-06-16T18:58:18Z

Create a separate page for each callback

New page

== Ambient sound effects (144) ==

This callback is a generic callback for feature 0C (new sounds) used for playing ambient sound effects.

The 15-bit return value is the sound effect number. Values from 0 to 72 (dec) are TTD's built-in sound effects, values beyond that refer to the sounds from [[Action11|Action 11]].

To decide whether to play a sound, and what sound to play, Var.Action 2 variable 10 holds the following information: THRRxxxt

{| |-
!Field!!Meaning
|-
|T||Tile class, 0=bare land, 4=trees, 6=water
|-
|H||Height of north corner of tile
|-
|RR||8 random bits
|-
|xxx||Reserved
|-
|t||Terrain type;  0 normal (grass), 1 desert, 2 rainforest, 4 on or above snowline
|}

This callback must be enabled by bit 4 in [[ActionD#Misc GRF Features 9E|action D var 9E]].
[[Category:Callbacks]]