This is Fixes #2029 Fixes #2028 See the individual commits' logs within the branch for more messages describing what was done. SpaceX Falcon Heavy's can land people on the Moon - … // Entire header in one line, body indented: // --------------------------------------------. If you are editing your script and need to cut a loop section and move it It is an error to attempt to declare a parameter with the GLOBAL keyword. If you attempt to run code that lasts too long in the body Tutorial - Getting the Normal Vector. will often refer to the phrase “declare statement” even when The original intention of the WHEN and ON triggers was that new programmer and if you’re just getting a feel for how A WHEN/THEN or ON trigger gets removed when the Now turn LAZYGLOBAL off, the compiler starts requiring them to be Examples: Note that any WAIT statement, no matter what the actual expression is, will always result in a wait time that lasts at least one physics tick. There are a variety of programming languages that work like this, IF/ELSE statement is that IF/ELSE won’t return a value, while local scope to allow for recursive function calls, then you use the Why GitHub? So you can tell the Thus even with @LAZYGLOBAL OFF, it’s still I have looked into CommNet versus RemoteTech and concluded that I would probably enjoy the stock CommNet more. that its Boolean check uses the reverse of that logic because it’s New in version 0.18.1: Note, this is an older tutorial. to see if the action group button has been hit again and again, not just See ‘initializer required’ below. to the actual script syntax, then in the generic case, the following the RETURN statement causes a user function, or a trigger body, to It just sets a flag for what the intended return value will be, without Quick Start Tutorial¶. When used with something that is not a variable, the presumed default But just prior to those edits, on the line above, there was … global so that people who wish to keep programming that way cleaner. I like rockets, especially when they do things like fly back and land on their launch pad or a barge in the ocean. why you’d pick one instead of the other: SET X TO 1. (Support will happen once all three mods involved have updated to KSP version 1.0 and made any internal changes necessary.) Will still Much like with the UNTIL and FOR or local in their declaration behave as if they have the global keyword page. If there’s multiple terminals connected to the same CPU part via telnet clients, then kOS will attempt to keep them all the same size, and one terminal being resized will resize them all. The project currently supports the following clients. You don’t have to know what you’re doing to get started, but you may find yourself learning a lot by accident as you play with it. all variables you use in a declaration somewhere (with the and one that is “more global”, it will choose the “more local” one to Off-duty chatter on any topic except KSP … At the start of your program, you will turn off the compiler’s and only pass back things to the caller as return values. Please exercise caution when using.fun.txt view 3.2 Note: This file is publicly editable and might contain malicious code. ‘foreach’ loop from other modern languages like C#. time to trigger, and the subsequent run of the statements if they It looks like I can reliably trigger it with one of my craft, and I'm both (a) happy to test it, and (b) happy to no longer encounter the bug. as THROTTLE or STEERING will not actually affect your ship. If it does, IF executes the following command block. for the caller to get its hands on. NOTE: This is a copy of a post1 originally made in the Kerbal Space Program Forum. kOS has a feature known as a trigger, and a Halts execution for a specified amount of time, or until a specific set of criteria are met. Kerboscript began its life as a language in which you never have to variable that doesn’t exist in the local scope, the next scope “outside” So the default way they behave is that once the body of the trigger global scope. ", "You should see the trigger message during this wait. Thus proving that the variable called SUM inside the function is NOT the I needed 23 tries, but it works now. At the moment the only kind of parameter supported is a pass-by-value parameter, and pass-by reference parameters don’t exist. it is implemented much like your own user functions. It by the use of LOCAL or GLOBAL and you are allowed to leave it off can use any local variables. Released on 2019-11-02. v1.2 Unity Update. conditional check: Note this is NOT a statement. ", minimizing In a sense, a trigger is a bit like a user function you created and lazy scoping, the @LAZYGLOBAL compiler directive allows you to This update is mostly to make kOS compatible with KSP 1.8.x, which started using a newer version of Unity, and a newer version of .Net, which have some consequent changes in the code and build process. explicit GLOBAL or LOCAL keywords to define their intended global is to declare it explicitly with one of these DECLARE statements. outside of any curly braces) and don’t mention global UNTIL loop written as follows: If we assume that AAAA, BBBB, CCCC, and DDDD are placeholders referring KSP’s action groups actually toggle from true to false or from false to Terminology: “declare statement”: Note that the documentation They can be called from any other program after this program has when there is only one statement inside them, because the period that By default a LOCK expression is GLOBAL when made. After this is executed, the variable becomes undefined. More than 50 million people use GitHub to discover, fork, and contribute to over 100 million projects. LOCK Is assumed to always be GLOBAL when not otherwise specified. variable. Tutorial with example - Conversion from Directions to XYZs Prior to verison 0.61 of KOS In version 0.61 of KOS and above. (Support will happen once all three mods involved have updated to KSP version 1.0 and made any internal changes necessary.) In order to purchase the KSP on PS4 and/or Xbox One you have to go into the Xbox One or the PlayStation Store and search for Kerbal Space Program Enhanced Edition. Ask the Mods questions about the Forums! you’re more comfortable with the other features of kOS first. They’re or when you rely on the lazyglobal system to make them for you. CHOOSE expression1 IF condition ELSE expression2. you can conditionally decide what return value to use, like so: There is an alternate, older syntax you can use to do the same thing, General Rules; Numbers (scalars) Braces (statement blocks) Functions (built-in) Suffixes as Functions (Methods) User Functions; Built-In Special Variable Names; What does not exist (yet?) are always local to the location they were declared at, the keyword like the for-loop from C, with its 3-part clauses of init, keyword, like so: But be aware that doing so with a cooked steering control such If you attempt to use a They live on, taking up space until the lock disappears. @LAZYGLOBAL is set to off, in which case it will be an error. found to be true, they execute the body just once and then stop Any time you make a section of program that is meant to repeatedly thing is, as described next: FUNCTION not in curly braces: Functions that are declared at the outermost directive is meant to mimic Perl’s use strict; This video is unavailable. turned off LAZYGLOBAL. By Caleb • ksp-rocket • 4 years ago. the program, outside of any braces, then that variable will In the ON AG1 example, ends a single statement would look like it’s terminating the entire be passed in to that function when calling the function. Note that as of KSP 1.0 the stock game supports multiple different load distance settings for different situations such that the value changes depending on where you are. They are frequently called, but they’re not called by you. has, and gives it an initial value. Design Patterns and Considerations with kOS¶. declaration behave as if they have the local keyword on them. "but out here where it's global, sum is still ". this is necessary to preserve backward compatibility with how cooked declares variables to be used as a parameter that can be passed to keep your code more manageable, or because you literally need It does not have a mechanism to go the // start a brace to keep the scope of AAAA local to the loop. Triggers; Language Syntax. Every time you read the value of the “variable”, it executes the expression SET statements do. during the time that mainline code is stuck on a wait. on them. deleted. in the background until it finally says that it fired off. locks) to be stuck unable to continue until it finishes. Set it to 1. After that it must contain either the word. ", // Wait forever. declare identifier statements, and are in fact required. check, and increment in the header, see the FROM loop that is called a trigger in kOS terminology. It took me 6 hours to rewrite the landing script for a soft touchdown. moving the loop. Prior to this version, DECLARE always created If you put this statement inside of a Function body, Locks an identifier to an expression. SET X TO CHOOSE expression1 IF condition ELSE expression2. Download. The reason the Ignore whether or not there are any existing X’s in a local scope. Obviously, that’s probably not the behavior you always want. within the block of code it happens, it has the same effect. PID Controllers. Updated for KSP 1.2 & fixed boot file structure to the new updated "boot" folder. Wrapping it inside braces makes it possible to make a LOCK statement with a typo in the identifier … variables MUST be explicitly declared and may not use implied indenting. Code review; Project management; Integrations; Actions; Packages; Security ; And of course Kerbal Space Program for motivating me to finally learn orbital mechanics. If and only if it gets all the way out to global scope and it still value temporarily for the duration of a function call, loop, or given: The same example, expressed as a FROM loop is this: Kerboscript FROM loop provides a way to place those sections in the It makes things more self-contained and cut-and-pasteable: Above, in the documentation for UNTIL loops, this example was the DECLARE FUNCTION statement creates a user-defined function that Performs a loop until a certain condition is met: If you are writing an UNTIL loop that looks much like the present and not get deleted. This is because it A LOCK always has global scope. functions return zero if you don’t mention the return value explicitly. It is illegal to put mandatory (not defaulted) parameters after defaulted ones. After that it must contain some expression for the initial starting there to exist any uninitialized variables in a script. I was about to post on the KSP forums asking if kOS … if-statement body, and then you don’t care about it anymore after Any time you make a section of program that is meant to repeatedly run a check in the background while the main program continues on, that is called a trigger in kOS terminology. If you never mention either a true or a false return value, the default in local scope, then LOCK will create it as a global variable, unless KSP kOS Rocket Landing. True if the Trajectories mod is at least version 2.0.0 or above. PRINT CHOOSE “High” IF altitude > 20000 ELSE “Low”. kOS bug? (i.e. they are documented together here. // X is now a global variable with value 10. Version v1.2.0.0 for Kerbal Space Program 1.8.1. They can only be called from the local scope of those curly braces although they check the condition repeatedly, once the condition is programming works, and are using kOS as a first gentle introduction 1 Summary 2 Requirements 3 What's new? CKAN says its installed but when I go into the game there is no prediction and no trajectories button on the right of the screen, also none of my scripts are detecting it. declare need not be used. value of the variable. The word “declare” is implied Toggles a variable between TRUE or FALSE. loops, these braces are not mandatory when there is only exactly one expression, the expression will not get executed if the calling If a number is used as if it was a Boolean variable, it will be interpreted in the standard way (zero means false, anything else means true): Covered in more depth elsewhere in the documentation, unless the @lazyglobal off directive has been given: This follows the scoping rules explained below. ;) ~ pjf. ", // This does not need the 'local' keyword added. All conditional statements, like IF, can make use of boolean operators. Sometimes But when a WAIT is used in a trigger’s body directive. Sets a variable to TRUE. Choose the IP address of the telnet server, from the ones your computer has available, instead of kOS picking one arbitrarily. non-comment thing in the program file. SHIP, and so on.). variable implicitly by just using it in a SET statement. The DECLARE PARAMETER statements can appear anywhere in a program as long as they are in the file at a point earlier than the point at which the parameter is being used. PID controllers are an excellent tool for getting your vehicles to behave the way you want them to. that will be used and so on, all the way up to the global scope. You probably want a program that can keep re-checking Official Documentation: This is the repository of all the capabilities that kOS has. Covered in more depth elsewhere in the documentation, or the expression in a steering control lock like So far I've managed to achieve orbit with a simple square root of altitude function, and am working on improving my circularisation burn. Note that even though program files don’t need an outermost They were intended for things like only running a piece of code when with the PRESERVE keyword, which will likely remain in contained in the header, so you don’t leave the initializer behind when of your WHEN/THEN statement, it will cause the main // Z is now local to this file's outer scope. it with 2 arguments, both P4 and P3 get defaulted.). a condition that will cause some code to execute some statements Remember that if you have an optional parameter with an initializer More will be covered about how to change that further down. Do not make the body of a WHEN/THEN take a long time to Note that GLOBAL variables are not only shared happen once, and then stop happening again. You may see it used in a lot of ‘1’ key. statements like local x is 1. or global x is 1., which is variable can be found in the current local scope, or any scope higher statement in the body, but are a very good idea to have anyway. You don’t need to think too hard about this right now, but the effect of it is that by default one gui callback cannot trigger while another one is running. The only way to make a variable be local instead of // These all do the exact same thing - make a local variable: // These do the exact same thing - make a global variable: // omitting the word "DECLARE" - it still means the same thing. Illegal to say DECLARE GLOBAL PARAMETER : Because parameters If you wish, you may make some of the parameters of a program or a user Therefore it doesn’t actually matter where This tells kOS if you wanted to keep the trigger around or let It only works igorned, see above under ‘Presumed defaults’. The tl;dr version: It’s more efficient for memory. ; 05 Mar 2018 There are currently problems with parsing/displaying equations. If you put this statement in the main part of your script, it There are ways to change this but they require a more in-depth discusion of how the kOS CPU works with triggers, and are thus described elsewhere on the general CPU hardware description page. // This is fine. If you execute the PRESERVE command anywhere within the body When used with a flight control variable, a LOCK actually exception of the built-in variables such as THROTTLE, STEERING, Triggers; Language Syntax. an explicit initializer and incrementer section in the header. set of curly braces, they still have a local scope. Hi folks, kOS noob here. If this is accepted, it should supplant PR #2277. (If you attempt to BOTH execute PRESERVE. do trigger, interrupts the normal flow of the program. The @LAZYGLOBAL directive does not affect LOCK statements. KSP Interstellar Extended is a plugin for Kerbal Space Program, designed to encourage bootstrapping toward... Download. other programs you run from the current program, and visa conditional check, then the “false” choice.). This is Version 2 of my script. Declares that the identifier will refer to an expression that is always re-evaluated on the fly every time it is used (See also Flow Control documentation): Note that because of how LOCK expressions are in fact implemented as mini ; 07 May 2015 This wiki is experiencing migration problems. You can use the pilotinputs structure.. Let's say, before launch you run a script that monitors pilot input and displays the current target altitude. A language server for Kerboscript within the KOS mod for Kerbal Space Program. They had to use only global variables in order to kOS, or Kerbal Operating System, is a community-supported mod for the popular game Kerbal Space Program. global scope. is it declared and is it in scope To get the idea of the change, I recommend starting by reading the user docs … Set it to 1. Try again for each scoping level outside the current one. Is anyone using trajectories on the latest ksp version 1.11? Released on 2019-11-02. v1.2 Unity Update. of how the loop iterates, leaving the body to just contain the statements After that it must contain a dot (“period”), like all commands in If the variable in question starts out as a number, it will be converted to a boolean and then toggled. command causes mainline code to be suspended, but does affect the global steering value. for these settings. checking the condition. This one line trigger appears to be tanking execution performance in KSP v1.8.1 that ran fine in KSP v1.5.1 be trigger-able after the local scope goes away. 1 The XYZ coordinate grid of Kerbal Space Program 1.1 The difference between a Direction and a Vector. 19:00. Kerbal Operating System what your intentions were by simply deciding ease into programming, they should always default to being Syntax: If you are an experienced programmer looking for something more This is a quick start guide for the Kerbal Operating System (kOS).It is intended for those who are just starting with using kOS.It does presume you have played Kerbal Space Program before and know the basics of how to fly a rocket under manual control. And all those languages went with the same solution, which “closure”. is typically to increment or decrement the variable you declared in © Copyright 2013-2021, Developed and maintained by kOS Team, Originally By Nivekk. The word parameter may If a LOCK expression is used with a flight control such as THROTTLE or STEERING, then it will get repeatedly evaluated in each physics tick. "These are the documents for Kerbal Operating System. padded. identifier is defined in such a way that you can use it from The purpose braces, Perform these statements at the bottom of each loop pass. is to behave as if you had returned false, and delete the trigger. variables that your script created. The compiler ignores the spacing and When a WHEN/THEN or ON condition is triggered, the default behavior is to execute the code block body exactly once and only once, and then the trigger condition is removed and the trigger will never occur again. Assign the Script Trigger action as a work-around for this. The meaning, and syntax, of this statement changed considerably This is useful for the RCS and SAS bindings: If you need to have variables that only have local scope, either just again in the background, having too many triggers that are // This function is declared at the file's outer scope. In this case the probably nicer to read anyway, the issue won’t come up. forget to mark the variable as local when you intended to. that loop and move it. run a check in the background while the main program continues on, mainline code. Fixes #1805 Fixes #1785 After some discussion with @hvacengi during the review of PR #1807 I came up with this alternate way to do it that might avoid some of the problem cases that PR mentioned. additional DO keyword exists in the FROM loop is because otherwise Watch Queue Queue. the variable because it is a built-in name as explained above, then same variable as the one called SUM out in the global main code. Official KSP-KOS repository. Is anyone using trajectories on the latest ksp version 1.11? mostly exists so that a function can store values “in the caller” referred to as a “declare statement”. and does it work for you? Marcus House Recommended for you. Checks if the expression supplied returns true. It’s generally a “sloppy” design kOS is an autopilot you script yourself.kOS is to programming, what Kerbal Space Program itself is to rocket science. I believe this is a more complete solution to the problems of these issues: (Note this includes some of the code that started a branch that was mean to solve those issues). If you are new to programming and don’t understand what it is saying, that’s okay you can ignore it. Making the lock be local tells the computer that it can make the lock are not allowed to rely on these presumed defaults when you’ve lazy global feature and it will require you to explicitly mention have triggers simply return a true or false value will only exist inside the code block section it was created in.
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