Bridges

The code for bridges consists of three parts:

• the bridge's definition
• the bridge's layout
• the bridge's graphics

The definition sets the feature properties of a bridge ID (length, price, max speed, ...). Please note that a bridge definition may only occur after a prior grfinit() function call for the newGRF file.

The bridge's layout functions are used to allocate graphics sprites for the various bridge types and segments.

The bridge's graphics are supplied by use of one or more spriteblock() functions, overriding original TTD sprites, most probably those of the toyland climate.

Function	Meaning
definebridge(<ID>, <block>)	Bridge definition
layout(<ID>, <block>)	Layout definition

This function defines a bridge. Its parameter is a fixed ID, and a block of property-defining functions, where the relative position of the property functions is irrelevant. Note that bridges have fixed IDs, in contrast to other features.

definebridge(0,
	intro(1950)
	minlength(3)
	maxlength(9)
	price(50)
	maxspeed(80 km/h)
	flags(NOFARPILLARS)
	purchasetext(_ptext)
	bridgerailtext(_railtext)
	bridgeroadtext(_roadtext)
)

• Bridge Tutorial