hpl2:tutorials:script:running_up_walls
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hpl2:tutorials:script:running_up_walls [2013/08/25 18:41] amn created |
hpl2:tutorials:script:running_up_walls [2015/07/17 20:32] (current) amn |
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| - | asd | + | ====== Running up walls ====== |
| + | |||
| + | This code will simulate the player running up walls.\\ | ||
| + | Since code ends up being too large and thus confusing, i'm dividing it in parts. | ||
| + | |||
| + | 1. How it works | ||
| + | |||
| + | {{http://s21.postimg.org/cjfsgmqqv/running_up_walls_image_1.jpg?direct&}} | ||
| + | |||
| + | This feature uses areas to determine where the wall is and to detect when the player jumps to it.\\ | ||
| + | Using the function //AddPlayerBodyForce// i can simulate the force of each leg running up. | ||
| + | |||
| + | To get the interval between steps, i'm using //Timers//.\\ | ||
| + | \\ | ||
| + | We declare the area collision: (//AreaWall1 // is the area covering the wall and //WallRunCollide // is the function.) | ||
| + | <code php> | ||
| + | void OnStart { | ||
| + | AddEntityCollideCallback( "Player", "AreaWall1", "WallRunCollide", false, 1 ); | ||
| + | } | ||
| + | </code> | ||
| + | |||
| + | And this is the function that triggers when the players collides with the area: | ||
| + | |||
| + | <code php> | ||
| + | void WallRunCollide ( string &in p, string &in c, int s ) { | ||
| + | AddPlayerBodyForce( 0, 20000, 0, false ); | ||
| + | } | ||
| + | </code> | ||
| + | |||
| + | 2. Adjusting code +//Timer// +//Loop// | ||
| + | |||
| + | //BodyForce // function uses large numbers, so i'm using a variable instead: | ||
| + | <code php> | ||
| + | void WallRunCollide ( string &in p, string &in c, int s ) { | ||
| + | float M = 10000; | ||
| + | AddPlayerBodyForce( 0, 2*M, 0, false ); | ||
| + | } | ||
| + | </code> | ||
| + | |||
| + | This will push the player up just once, so i'm adding a //Timer+Loop // to repeat the impulse (5 times): | ||
| + | <code php> | ||
| + | void WallRunCollide ( string &in p, string &in c, int s ) { | ||
| + | float i = 0.25; int n = 5; float r = 0; | ||
| + | |||
| + | for ( int v = 1; v <= n; v++ ) { | ||
| + | AddTimer ( "", r, "RunOnMe" ); | ||
| + | r = r +i; | ||
| + | } | ||
| + | } | ||
| + | </code> | ||
| + | |||
| + | As you can see, the content changed, i moved it to another new function.\\ | ||
| + | I added 3 variables, interval, number and a counter.\\ | ||
| + | These are used in the //for loop.\\ | ||
| + | // This loop will set a //Timer// to call the function "//RunOnMe//" //n// times, on an interval of //i // seconds.//\\ | ||
| + | // \\ | ||
| + | \\ | ||
| + | Below is the new function i created that the //Timers// will trigger: | ||
| + | <code php> | ||
| + | void RunOnMe ( string &in t ) { | ||
| + | float M = 10000; | ||
| + | AddPlayerBodyForce( 0, 2*M, 0, false ); | ||
| + | } | ||
| + | </code> | ||
| + | |||
| + | This is supposed to be a step, i'm adding a sound: | ||
| + | |||
| + | <code php> | ||
| + | void RunOnMe ( string &in t ) { | ||
| + | float M = 10000; | ||
| + | AddPlayerBodyForce( 0, 2*M, 0, false ); | ||
| + | PlayGuiSound( "step_run_female_rock.snt", 0.4 ); | ||
| + | } | ||
| + | </code> | ||
| + | |||
| + | At this point, the code is working fine. You can test it out. | ||
| + | |||
| + | 3. Preventions | ||
| + | |||
| + | Now we have to consider possible bugs.\\ | ||
| + | We don't want to trigger this if the player didn't jump.\\ | ||
| + | It would look weird and just fail cause there's not enough starting force.\\ | ||
| + | We can avoid that using //GetPlayerYSpeed()// function, anything below 1 is not jumping: | ||
| + | <code php> | ||
| + | void WallRunCollide ( string &in p, string &in c, int s ) { | ||
| + | |||
| + | if ( GetPlayerYSpeed() <1 ) { return; } | ||
| + | float i = 0.25; int n = 5; float r = 0; | ||
| + | |||
| + | for ( int v = 1; v <= n; v++ ) { | ||
| + | AddTimer ( "", r, "RunOnMe" ); | ||
| + | r = r +i; | ||
| + | } | ||
| + | } | ||
| + | |||
| + | </code> | ||
| + | |||
| + | That new condition i just added will stop the code by using the //return // function.\\ | ||
| + | So player may walk into the wall area and not get thrown up by the wall running code. | ||
| + | |||
| + | 4. Direction | ||
| + | |||
| + | We are adding now a small tweak to our code to let the player direct his wall running.\\ | ||
| + | Using //AddPlayerBodyForce // we can add a slight push ahead: ( just to help the player go where he's looking at) | ||
| + | <code php> | ||
| + | void RunOnMe ( string &in t ) { | ||
| + | float M = 10000; | ||
| + | AddPlayerBodyForce( 0, 2*M, 0, false ); | ||
| + | AddPlayerBodyForce( 0, 0, 0.7*M, true ); | ||
| + | PlayGuiSound( "step_run_female_rock.snt", 0.4 ); | ||
| + | } | ||
| + | |||
| + | </code> | ||
| + | |||
| + | 0.7<nowiki>*</nowiki> M should be enough, remember this will run on every step. There's 5. | ||
| + | |||
| + | 5. Functionality | ||
| + | |||
| + | This is the end of this guide. With this code you can experiment new functionalities and expand its possibilities.\\ | ||
| + | If you're interested, you can take a look at my code in any script file from my mod Riukka for more developed functions on wall running. | ||
| + | |||
| + | \\ | ||
| + | Amn.- | ||
hpl2/tutorials/script/running_up_walls.1377456064.txt.gz · Last modified: 2013/08/25 18:41 by amn
