Action3/Canals

Introduction

Action 3 assigns graphics sets (referenced to by (chains of) action 2(s) to feature IDs.

Format

The format of the data is feature-dependent, canals use specific ids which define the graphics being provided.

The data is:

 <Sprite-number> * <Length> 03 05 01 <id> 00 <set-ID>

Element	Size	Description
<Sprite-number>	dec	A sequential sprite number
<length>	dec	The total number of bytes used in this action
03	B	Defines action 03
05	B	Feature 05 "Canals"
01	B	Canals and rivers can only provide one "ID" at a time
<id>	B/B*	IDs of the current feature this action 3 associates graphics with. There must be as many IDs as <n-id> specifies
00	B	Canals support no cargo types
<set-ID>	W	Default set-ID to use if none of the above matches

Description

Sprite-number

This is just the number you are at.

Length

Count the number of bytes in this action.

Feature

This sets the type of feature that you wish to change, 05 for canals in this case

id

In the case of canals or rivers this differs by the type of sprites provided in the real sprite:

ID	Description	Sprites		Sprites when prop. 09 Bit 0 is set
00	Watercliffs	0.6 2.5	4 slope sprites	1.1 2.6	1 flat ground sprite followed by 4 slope sprites
01	Locks	0.6 2.5	24		undefined
02	Dikes	0.6 2.5	12		undefined
03	Icons	2.5	1		undefined
04	Flat docks	2.5	4		undefined
05	River Slope	0.6 2.6	4	1.1 2.6	1 flat ground sprite followed by 4 slope sprites
06	Riverbanks	0.6 2.6	12*5 (Last 4 for slopes)		undefined
07	River GUI	0.6 2.6	2		undefined

Dikes (Canals) (02)

River slopes (05)

When property 09, bit 0 is NOT set, the required sprites are

if the bit is set, the sprites are preceeded by a flat water tile which then represents the water used exclusively for rivers.

Riverbanks (06)

This contains 5 times sprites as shown for id2 (dikes). The first 12 sprites are for level land, the following ones are for sloped rivers where slopes follow the same order as for id5 (river slopes).

set-ID

set-ID (or Action2 ID)