[vitorrossi]

This code allows a player to climb/crawl through walls. Also when the player stop while climbing, he will be stuck to the wall and will not fall.

PHP Code:

//Two global variables. First tells us if the player is above ground and stuck to the wall.
//Second finds the origin of the player when he is near a wall.

new g_bfStuckToWall;
new Float:g_flWallOrigin[33];

#define stickPlayer(%1)            g_bfStuckToWall |= (1 << (%1 & 31))
#define unstickPlayer(%1)        g_bfStuckToWall &= ~(1 << (%1 & 31))
#define isStuck(%1)                g_bfStuckToWall & (1 << (%1 & 31)) 


PHP Code:

//Register touch to find if player is touching a wall.
//Register prethink to create wallclimb when conditions are proper.

register_touch("worldspawn","player","Touch_Climb");
register_touch("func_brush","player","Touch_Climb");
register_touch("func_breakable","player","Touch_Climb");
register_forward(FM_PlayerPreThink, "Forward_PlayerPreThink", 0); 


PHP Code:

public Touch_Climb(Ent,id)
{
    //If player is touching a wall then we find it's origin

    pev(id,pev_origin,g_flWallOrigin[id]);
        
    return PLUGIN_HANDLED;
} 


PHP Code:

public Forward_PlayerPreThink(id)
{
    //If player is dead then ignore.
    
    if(!is_user_alive(id))
        return;
        
    static iButton[33], iCrawlSpeed;
    
    //Get button that player is using as well as the speed he is supposed to move on the wall.
    //I left iCrawlSpeed as a get_pcvar_num so you can register a cvar for that.
    
    iButton[id] = get_user_button(id);
    iCrawlSpeed = get_pcvar_num(YOU_CVAR);

    if(iButton[id] & IN_USE)
    {
        //Here we have three matrices holding the origin of the player, previous origin and velocity.
        
        static Float:fOrigin[33][3];
        static Float:fOriginOld[33][3];
        static Float:fVelocity[33][3];
        
        //Get user origin.
        
        pev(id,pev_origin,fOrigin[id]);
        
        //If he is far from the wall then return.
        
        if(get_distance_f(fOrigin[id],g_flWallOrigin[id]) > 10.0)
            return;
        
        //If holding iButton and moving forward
        
        if(iButton[id] & IN_FORWARD)
        {
            //Check if player is stuck to wall.
            switch(isStuck(id)){
                
                //If not them make him move.
                case 0:{
                    velocity_by_aim(id,iCrawlSpeed,fVelocity[id]);
                    set_pev(id,pev_velocity,fVelocity[id]);
                }
                
                //If yes then unstuck him.
                default:{
                    unstickPlayer(id);
                }
            }
        }
        
        //If holding iButton and moving back
        
        else if(iButton[id] & IN_BACK)
        {
            switch(isStuck(id)){
                case 0:{
                    velocity_by_aim(id,-iCrawlSpeed,fVelocity[id]);
                    set_pev(id,pev_velocity,fVelocity[id]);
                }
                            
                default:{
                    unstickPlayer(id);
                }
            }
        }
        
        else if(iButton[id])
        {
            //If Player is holding iButton but not moving, then g_bStuckToWall = true
            //and previous origin will now always be equal to current.
            
            switch(isStuck(id)){
                case 0:{
                    fOriginOld[id] = fOrigin[id];
                    stickPlayer(id);
                }
            }
            
            //Set his velocity to zero.
            velocity_by_aim(id,0,fVelocity[id]);
            set_pev(id,pev_velocity,fVelocity[id]);
            
            //if the diference between previous and current origins are small, then set
            //set player's new origin as previous
            
            if(get_distance_f(fOrigin[id],fOriginOld[id]) <= 10){
                set_pev(id,pev_origin,fOriginOld[id]);
            }
        }
    }
} 


[fysiks]

What is this? Are you having issues? Does this code work? Why did you post it here?

[vitorrossi]

Yeah it works, I struggled with it and finally got it to work, so I thought I'd share!

[YamiKaitou]

Originally Posted by fysiks What is this? Why did you post it here?

[vitorrossi]

Definition under the Code Snippets/Tutorials Forum:

Post tutorials/snippets/includes/stocks of code here that you find useful

If it doesn't belong here just delete it

[YamiKaitou]

Normally, when people post stuff here, they post an explanation and/or a tutorial. You just post a snippet with zero details.

[micapat]

"For some reason if you make these as "new" and also not an array, the player starts falling".

LOL.

Furthermore register_touch would be better.

[vitorrossi]

Originally Posted by micapat "For some reason if you make these as "new" and also not an array, the player starts falling". LOL.

Yeah I'm new lol so somethings are still a mistery to me. Anyway, I will upload a better explanation

Edit: I added some explanation to my steps. If this still doesn't belong here then sorry I posted. Was just trying to share things I've learned

[YamiKaitou]

I meant an explanation about what the snippet as a whole does and/or tries to accomplish

[Liverwiz]

I'd also suggest using a bitsum instead of a bool array.
As such....

new bool:g_bStuckToWall[33];

PHP Code:

new g_bStuckToWall;
#define stickPlayer(%1)    g_bStuckToWall |= (1 << (%1 & 31));
#define unstickPlayer(%1)    g_bStuckToWall &= ~(1 << (%1 & 31));
#define isStuck(%1)        g_bStuckToWall & (1 << (%1 & 31)); 


This will be much faster and more efficient. As well as at the end of the round (to unstick people) you can simply g_bStuckToWall = 0 rather than looping through the array and setting all to false.

If you'd like more information about bitsums read THIS tutorial by Bugsy.