this.alpha and showpoly

[Engine]

I cannot figure out how to change the alpha on polygons, could anyone help me? I want to use polygons with the particle engine to mess around but I can't seem to figure it out.

PHP Code:

function ShowPolyTest(){
  showpoly(200,{22,22,22,25,25,25,25,22});
  this.alpha = 0.5;
  with(findimg(200)){
      this.alpha = 0.5;
  }
} 


[Immolate]

Originally Posted by Engine

I cannot figure out how to change the alpha on polygons, could anyone help me? I want to use polygons with the particle engine to mess around but I can't seem to figure it out.

PHP Code:

function ShowPolyTest(){
  showpoly(200,{22,22,22,25,25,25,25,22});
  this.alpha = 0.5;
  with(findimg(200)){
      this.alpha = 0.5;
  }
} 


PHP Code:

function ShowPolyTest(){
  temp.polygonObj = showpoly(200,{22,22,22,25,25,25,25,22});
  temp.polygonObj.mode = 1;
  temp.polygonObj.alpha = 0.5;
} 


As I PMed you on Testbed, this seems to do the trick, if that's the effect you're looking for.

[Engine]

Oh, thanks I didn't see your pm.

[Engine]

I have another problem with showpoly, I figuired I might as well put it in here instead of making a new thread.

PHP Code:

function blahblah(){
  polytest = showpoly(200,{blah,blah,blah,ect});
}
function ifthishappens(){
  polytest.mode = 1;//works
  polytest.red = 0.5;//works
  polytest.blue = polytest.green = 0; //works
  polytest.x = player.x; //doesnt work
  polytest.y = player.y; //doesnt work
} 


Is there a reason why this wont work?

[Immolate]

Originally Posted by Engine

I have another problem with showpoly, I figuired I might as well put it in here instead of making a new thread.

PHP Code:

function blahblah(){
  polytest = showpoly(200,{blah,blah,blah,ect});
}
function ifthishappens(){
  polytest.mode = 1;//works
  polytest.red = 0.5;//works
  polytest.blue = polytest.green = 0; //works
  polytest.x = player.x; //doesnt work
  polytest.y = player.y; //doesnt work
} 


Is there a reason why this wont work?

Well, I think it's because polygons have multiple coordinates, but I'm not sure. To make it equal to the player's coordinates, you'd just draw every point on the polygon relative to them. For example:

PHP Code:

showpoly( 200, { player.x, player.y, player.x + 5, player.y } ); 


This would draw a straight horizontal line relative to the player's position.

It's also probably a better idea to use a this. variable instead of a global variable.

[Engine]

Well, what i'm trying to do is make a hit box and then make it so I can widen it with a slider and anything in the hit box will set this.chat to it's npcs[i].id. I'm just messing around and this really has no purpose, I'm just trying to learn.

Edit: So there isn't a way to change the entire showpoly's x/y with this.polytest.x?

[Immolate]

Originally Posted by Engine

Well, what i'm trying to do is make a hit box and then make it so I can widen it with a slider and anything in the hit box will set this.chat to it's npcs[i].id. I'm just messing around and this really has no purpose, I'm just trying to learn.

Edit: So there isn't a way to change the entire showpoly's x/y with this.polytest.x?

I don't think so. Probably best just to have your own variables that you can edit which acts as the base position.

[Engine]

Would I have to put the showpoly in a timeout to have it so it checks for updates constantly?

[Immolate]

Originally Posted by Engine

Would I have to put the showpoly in a timeout to have it so it checks for updates constantly?

Yeah, but only check if the variables change. If they do, call a function to update the polygon's position. Don't repeatedly redraw the polygon.

It'd be great if we could bind an event to certain variables that is triggered when the variable changes.

[Engine]

Alrighty, thanks a lot I finally figured it out. I'm glad you told me just to check it when it updates otherwise I would have had it looping every 0.1 seconds haha.

[Engine]

Alright, this might as well be renamed to my help thread
Can I do this clientside because it's not working for me clientside and I seem to remember reading that you can seartch through all the players x/y clientside?

PHP Code:

  for (pl: allplayers) {
    pl.chat = "test";
    if (pl.x in | HBx - 1.5, HBy - 1.5 | && pl.y in | HBx + 1.5, HBy + 1.5 | ) {
      pl.chat = "hit.";
    }
  } 


[cbk1994]

Polygon alpha has always been really sketchy. Sometimes it doesn't even work in v5, but it is fixed in v6.

[Grey]

Originally Posted by Engine

Alright, this might as well be renamed to my help thread
Can I do this clientside because it's not working for me clientside and I seem to remember reading that you can seartch through all the players x/y clientside?

PHP Code:

  for (pl: allplayers) {
    pl.chat = "test";
    if (pl.x in | HBx - 1.5, HBy - 1.5 | && pl.y in | HBx + 1.5, HBy + 1.5 | ) {
      pl.chat = "hit.";
    }
  } 


I think your problem is that you're checking the player x and player y against both an x and y value.

PHP Code:

if (pl.x in | HBx - 1.5, HBx + 1.5 | && pl.y in | HBy - 1.5, HBy + 1.5 | ) { 


But also, if you need to player actions serverside you can use FindPlayer(), for example finding a player's x would be done via

PHP Code:

FindPlayer(pl).x 


And finally, allplayers I believe is all players on the server and players is all players in the current level (not sure what you're trying to do but players might be a better option)

[Immolate]

Originally Posted by Engine

Alright, this might as well be renamed to my help thread
Can I do this clientside because it's not working for me clientside and I seem to remember reading that you can seartch through all the players x/y clientside?

PHP Code:

  for (pl: allplayers) {
    pl.chat = "test";
    if (pl.x in | HBx - 1.5, HBy - 1.5 | && pl.y in | HBx + 1.5, HBy + 1.5 | ) {
      pl.chat = "hit.";
    }
  } 


Use 'players' instead of 'allplayers'. That might work for you. The if statement seems correct, though it might be useful to provide how you're setting HBx and HBy.

[Engine]

The center x/y of the polygon.

[Engine]

And yet another problem, I cannot seem to get this to work. I have tried multiple variations of it but nothing I could conjure up in my head seems to work. Could someone point me in the right direction.

PHP Code:

function onActionServerSide(){
  for(pl:allplayers){
    if (players[pl.id].x in | player.x -5, player.x + 5 | && players[pl.id].y in | player.y-5, player.y +5 | ) {     
      findplayer(pl).chat = pl.account;
    }
  }
}
//#CLIENTSIDE
function onKeyPressed(){
  if(keydown(6)){
    triggerserver("gui", name, NULL);
  }
} 


[Immolate]

Originally Posted by Engine

And yet another problem, I cannot seem to get this to work. I have tried multiple variations of it but nothing I could conjure up in my head seems to work. Could someone point me in the right direction.

PHP Code:

function onActionServerSide(){
  for(pl:allplayers){
    if (players[pl.id].x in | player.x -5, player.x + 5 | && players[pl.id].y in | player.y-5, player.y +5 | ) {     
      findplayer(pl).chat = pl.account;
    }
  }
}
//#CLIENTSIDE
function onKeyPressed(){
  if(keydown(6)){
    triggerserver("gui", name, NULL);
  }
} 


You could, instead of 'players[pl.id]', just use 'pl', since it's just a reference of the player object anyway.

[DustyPorViva]

You need to pass the player data serverside. On the serverside your player is not the only player object, thus you need to give the script scope.

PHP Code:

function onActionServerSide(){
  for(temp.p:allplayers){
    temp.pl = findplayer(p);
    temp.mypl = findplayer(params[0]);
    if (pl.x in | mypl.x -5, mypl.x + 5 | && pl.y in | mypl.y-5,mypl.y +5 | ) {     
      pl.chat = pl.account;
    }
  }
}
//#CLIENTSIDE
function onKeyPressed(){
  if(keydown(6)){
    triggerserver("gui", name,player.account);
  }
} 


Also, you can instead on the clientside use findnearestplayers(x,y), loop through, find the players you wish to send the chat and send the array to the serverside, instead of letting the server handle the loop.

[Immolate]

Originally Posted by DustyPorViva

You need to pass the player data serverside. On the serverside your player is not the only player object, thus you need to give the script scope.

PHP Code:

function onActionServerSide(){
  for(temp.p:allplayers){
    temp.pl = findplayer(p);
    temp.mypl = findplayer(params[0]);
    if (pl.x in | mypl.x -5, mypl.x + 5 | && pl.y in | mypl.y-5,mypl.y +5 | ) {     
      pl.chat = pl.account;
    }
  }
}
//#CLIENTSIDE
function onKeyPressed(){
  if(keydown(6)){
    triggerserver("gui", name,player.account);
  }
} 


Using the player object has mostly worked for me serverside when using triggerserver, since I think it still keeps the player who triggered serverside in scope. Could be completely wrong though and it's probably a good idea to get into the habit of not assuming the player obect is always in scope.

[cbk1994]

Originally Posted by Engine

And yet another problem, I cannot seem to get this to work. I have tried multiple variations of it but nothing I could conjure up in my head seems to work. Could someone point me in the right direction.

PHP Code:

function onActionServerSide(){
  for(pl:allplayers){
    if (players[pl.id].x in | player.x -5, player.x + 5 | && players[pl.id].y in | player.y-5, player.y +5 | ) {     
      findplayer(pl).chat = pl.account;
    }
  }
}
//#CLIENTSIDE
function onKeyPressed(){
  if(keydown(6)){
    triggerserver("gui", name, NULL);
  }
} 


Try this:

PHP Code:

function onActionServerSide(cmd) {
  if (cmd == "hitPlayers") {
    // before you were using 'allplayers' which is an array of every player on the server
    // 'players' is an array of every player in the current level
    // 'findNearestPlayer(x, y)' just returns every player within a level or so of the x/y given. It's a lot more efficient when used on GMAPs.
    for (temp.pl : findNearestPlayers(player.x, player.y)) {
      if (pl.x in |player.x - 5, player.x + 5| && pl.y in |player.y - 5, player.y + 5|) {
        pl.chat = "oww!!!";
        player.chat = "I hit " @ pl.communityname @ "!";
      }
    }
  }
}
//#CLIENTSIDE
function onKeyPressed() {
  if (keydown(6)) {
    triggerserver("gui", this.name, "hitPlayers"); // it is customary to always send a command for verification purposes
  }
} 


Originally Posted by DustyPorViva

You need to pass the player data serverside. On the serverside your player is not the only player object, thus you need to give the script scope.

PHP Code:

function onActionServerSide(){
  for(temp.p:allplayers){
    temp.pl = findplayer(p);
    temp.mypl = findplayer(params[0]);
    if (pl.x in | mypl.x -5, mypl.x + 5 | && pl.y in | mypl.y-5,mypl.y +5 | ) {     
      pl.chat = pl.account;
    }
  }
}
//#CLIENTSIDE
function onKeyPressed(){
  if(keydown(6)){
    triggerserver("gui", name,player.account);
  }
} 


Also, you can instead on the clientside use findnearestplayers(x,y), loop through, find the players you wish to send the chat and send the array to the serverside, instead of letting the server handle the loop.

No offense intended to Dusty, but I would ignore everything he said. You should always do things like hit detection serverside. You should always assume that the player can change any clientside code, and do everything you can serverside to prevent against hackers.

Second, if you trigger serverside, your player object is always in scope. Sending your player account with it is a huge security risk because a hacker could change this to make other players do something.

Third, this is completely unnecessary:

PHP Code:

  for(temp.p:allplayers){
    temp.pl = findplayer(p); 


p in this case is already a TServerPlayer object. Technically findPlayer(String account) shouldn't even find the player correctly. The only reason it does work is because it interprets the object as object.name, which happens to be the account name of the player. For example, you can do:

PHP Code:

for (temp.pl : allplayers) {
  pl.chat = "hello";
  pl.setlevel2("start.nw", 30, 30);
  
  if (pl.x > 32) {
    pl.x = 16; // example
  }
} 


Again, sorry if I give off the feeling of being offensive, just trying to help

[Engine]

Thanks for the awesome explanation Chris and Dusty. I have another question, is there a better way to have a more accurate hit detection? I tried making a showpoly that would show me the area being hit but it doesn't seem to hit correctly in the box.

PHP Code:

function onActionServerSide(hittx, hitty) {
  this.range = - 3;
  for (pl: findNearestPlayers(player.x, player.y)) {
    if (pl.account != player.account) {
      if (pl.x in | hittx + this.range, hittx | && pl.y in | hitty + this.range, hitty | ) {
       //Do stuff
      }
    }
  }
}
//#CLIENTSIDE
function onKeyPressed() {
  if (keydown(6)) {
    temp.hitx = player.x + 1.4 + vecx(player.dir) * 2;
    temp.hity = player.y + 1.5 + vecy(player.dir) * 2;
    test.lol = showpoly(200, {
                          temp.hitx - 1.5, temp.hity - 1.5,
                          temp.hitx + 1.5, temp.hity - 1.5,
                          temp.hitx + 1.5, temp.hity + 1.5,
                          temp.hitx - 1.5, temp.hity + 1.5});
    test.lol.mode = 1;
    test.lol.alpha = .5;
    triggerserver("gui", name, temp.hitx, temp.hity);
  }
} 


[DustyPorViva]

Serverside HD will always feel inaccurate unless you have a good ping/connection, as it's detecting player's where the server knows they are, rather than where you're seeing them on the clientside. However, a lot of how you do HD will depend on what sort of HD you want and a lot of logic.

For example, you'll want the 'hit origin' of the target to be at player.x+1.5 and playery+2. That's the center of the player's blocking area. So instead of detecting if the player's x is in the range, you detect iif the center is, like so:

if (pl.x+1.5 in |hittx + this.range,hittx|)

However, before the days of 'in', we would calculate HD via delta's. Like so:

PHP Code:

temp.hitx = player.x+1.5+vecx(player.dir)*2;
temp.hity = player.y+2+vecy(player.dir)*2;
if (abs((pl.x+1.5) - hitx) <= 1.5 && abs((pl.y+2) - hity) <= 1.5) {
  // Will hit a player in a 3 tile block of the player's immediate direction.
  // abs() calculates the absolute value. So whether the player is -2 tiles away from the hit, or 2, it will return as 2.
  // this makes it easier to process the data
} 


However, using 'in' is just as well anymore.

[cbk1994]

Here's what we use on Era Dev. It's as accurate as possible, just make sure you have the actual point you hit at the right location. Try showing a polygon dot there until it's correct.

PHP Code:

function attackPlayers(dx, dy) {
  for (temp.pl : findNearestPlayers(dx, dy)) {
    if (! (dx in |pl.x, pl.x + 3| && dy in |pl.y, pl.y + 3|)) {
      continue;
    }
    
    pl.chat = "owww!!!";
  }
} 


We're using this for melee attacks:

PHP Code:

temp.dx = player.x + 1.5 + vecx(dir) * 2;
temp.dy = player.y + 2 + vecy(dir) * 2; 


so looks like everything is good

[Engine]

It's late and maybe I'm just over thinking this but I don't get what the "if (NOT(dx in |" is for, wouldn't you want them to be in the the hitbox?

[cbk1994]

Originally Posted by Engine

It's late and maybe I'm just over thinking this but I don't get what the "if (NOT(dx in |" is for, wouldn't you want them to be in the the hitbox?

The command "continue" in that if clause is skipping to the next player in the array. Alternatively you could just put the hit commands in the clause and remove the "!".

[Engine]

Is there any downfall to doing it that way?

[cbk1994]

Originally Posted by Engine

Is there any downfall to doing it that way?

Nope. I did it with continue because there was some more stuff down there and it gets messy with lots of indents. It's also good for stuff like:

PHP Code:

for (temp.pl : players) {
  if (pl.clientr.hp <= 0) {
    continue;
  }
  
  if (pl == player) {
    continue;
  }
  
  if (pl.onStaffTag()) {
    continue;
  }
  
  if (pl.guild == player.guild && player.guild != "") {
    continue;
  }
  
  pl.chat = "oww!!!";
} 


as opposed to

PHP Code:

for (temp.pl : players) {
  if (pl.clientr.hp > 0 && pl != player && ! pl.staffTag() && (pl.guild != player.guild && player.guild != "")) {
    pl.chat = "oww!!!";
  }
} 


[Engine]

Oh, alright. I get it now, I was totally confused for a second. Thanks again.