Category:Mission Scripting

Mission Scripting

Introduction

The original Mission Script looked something like this (taken from vice city debug.sc file):

IF IS_BUTTON_PRESSED PAD2 RIGHTSHOULDER1 AND flag_create_car = 1 AND button_press_flag = 0 IF IS_CAR_DEAD magic_car DELETE_CAR magic_car ELSE IF NOT IS_PLAYER_IN_CAR player magic_car DELETE_CAR magic_car ELSE MARK_CAR_AS_NO_LONGER_NEEDED magic_car ENDIF ENDIF flag_create_car = 0 initial_car_selected = 0 button_press_flag = 1 ENDIF

Easy to read and understand, and fairly basic, so anyone with an idea of basic coding (or even english) can understand it. However, very little code came with the game like that, the majority of the mission script comes in a file called main.scm (although in San Andreas there ar alternate mains and external scripts, but they all follow the same basic format - hex codes). Example, for the code:

IF IS_CAR_DEAD magic_car DELETE_CAR magic_car

The equivalent in the main.scm would look something like this:

D6 00 04 00 19 01 02 45 0E 4D 00 01 FE 3D 87 02 A6 00 02 45 0E

As you can see, this is nowhere near as easy to understand (infact, its pretty hard to understand, even for someone who knows the SCM format), the original code (which is easy for us to understand)