The "How do I..." Thread

[Remmirath]

I vote for 1 and 4

The 4th one is: <!>

[bagheadspidey]

So I have (1) a true-color sprite which (2) uses a color set (a limited 32 color set still) other than the Doom green for the suit. The former makes me wonder how to do translation at all on it, and for the latter, how to set up the PlayerPawn decorate definition so that gzdoom can recolor the sprite according to the player's likes.

First, Graf's Mantra (tm):

Translations on PNGs are undefined. There is no guarantee that they may work correctly.

The image will be converted to the doom palette by the engine before the translation is applied. This means (if you are still going to try this) you should use the green range from the doom palette, and translate that to your custom color of green or any other player colors. It also means if your player has a turquoise hat, it's going to get translated to blue or gray or something when the translation is applied. So to fix that, the hat would also need to be colored using the doom palette, and then translated to turquoise when the player picks his uniform color.

In other words, trying to apply translations to images not using colors from the current PLAYPAL will not work out very well, and applying translations to non-doom-format images is not officially supported.

[Ceeb]

Here's something I need a hand with, but doesn't warrant it's own thread.

I have a barrier that can be cut down with a chainsaw. However, it falls down immediately; I want the player to have to saw at it for a few seconds. I don't know how to do that kind of thing.

Code: Select all • Expand view

int script3talk = 1;

script 3 (void) //Wood barrier is destroyed
{
if(script3stopper == 0)
{
if(checkweapon("GasChainsaw"))
{
script3stopper = 1;
activatorsound("woodbreak",127);
setlinetexture(1,SIDE_FRONT,TEXTURE_MIDDLE,"WOOGA2");
delay(3);
setlinetexture(1,SIDE_FRONT,TEXTURE_MIDDLE,"WOOGA3");
delay(3);
setlinetexture(1,SIDE_FRONT,TEXTURE_MIDDLE,"WOOGA4");
delay(3);
setlinetexture(1,SIDE_FRONT,TEXTURE_MIDDLE,"WOOGA5");
delay(3);
setlinetexture(1,SIDE_FRONT,TEXTURE_MIDDLE,"WOOGA6");
setlineblocking(1,off);
}
else
{
if(script3talk == 1)
{
script3talk = 0;
print(s:"\csA chainsaw would make quick work of this.");
}
}
}
}

[Remmirath]

Maybe the delay is too short. Try to increase it at least to 15 tics.

[carlcyber]

Because once script3stopper == 0 and checkweapon("GasChainsaw") evaluates true, the wall falls down. You need an extra variable to simulate the health of the wall.

Code: Select all • Expand view

int woodhealth = 20;

script 3 (void) //Wood barrier is destroyed
{
    if(script3stopper == 0)
    {
        if(checkweapon("GasChainsaw"))
        {
            if(--woodhealth == 0)
            {
                script3stopper = 1;
                // ...
            }
        }
        else
        {
            // ...
        }
    }
} 

[ShailsTSPT]

Guys you passes through my question so here it goes again:

How do I make it so if a player presses use in a linedef it executes a script that shows a message on the screen of all the players in the game? PS: I only now that scripts go in the BEHAVIOR lump nothing more >.< know nothing about script and all that. But I may end up needing to use what im asking

[Remmirath]

Copy this in the Doom Builder script editor:

Code: Select all • Expand view

#include "zcommon.acs"

script 1 (void)
{
   print(s:"Hello World!");
}


Then assign to a linedef action 80, with the first parameter set to 1, and make it so that it can be activated by the player when he presses the Use key.

[ShailsTSPT]

Thanks Morpheus that really helped me!

[Ceeb]

Thanks carl. I'll try that.

Edit:

I think I'm doing it right, but uh, how do I subtract? Here's the modified script. I've noted where I get the error. It... Makes no fucking sense to me.

Code: Select all • Expand view

int woodhealth = 30;

script 3 (void) //Wood barrier
{
if(script3stopper == 0)
{
if(checkweapon("GasChainsaw"))
{
if(woodhealth == 0)
{
script3stopper = 1;
activatorsound("woodbreak",127);
setlinetexture(1,SIDE_FRONT,TEXTURE_MIDDLE,"WOOGA2");
delay(3);
setlinetexture(1,SIDE_FRONT,TEXTURE_MIDDLE,"WOOGA3");
delay(3);
setlinetexture(1,SIDE_FRONT,TEXTURE_MIDDLE,"WOOGA4");
delay(3);
setlinetexture(1,SIDE_FRONT,TEXTURE_MIDDLE,"WOOGA5");
delay(3);
setlinetexture(1,SIDE_FRONT,TEXTURE_MIDDLE,"WOOGA6");
setlineblocking(1,off);
}
else
{
woodhealth - 1; //this is the problem, it says there's a "missing assignment operator"
}
}
}
}

[Ryan Cordell]

I think you should actually use "woodhealth--". I know that that slowly decreases the variable/integer/whatever in increments.. But I'm not sure if it can be used standalone or in a loop.

[bagheadspidey]

To expand on that, here's what you're trying to do in that line: subtract one from woodhealth. That means you want to assign a value to woodhealth that is one less than the current value of woodhealth. So there are different ways to write it:

woodhealth = woodhealth - 1;
woodhealth -= 1;
woodhealth--;
--woodhealth;

All four will work, but think of the last three as shortcuts for the first way of writing it. In the first case, the equals sign is an assignment operator; the variable on the left side of the equation will be assigned the value on the right side of the equation.

So what if you wanted woodhealth to be half of its previous value instead of one less than its previous value?

woodhealth = woodhealth / 2;
woodhealth /= 2;

Hopefully that helps explain why it says there is a "missing assignment operator" -- because there is. You calculated the value of woodhealth minus one but didn't assign that value to any variable.

[ShailsTSPT]

Another question:
How can I make it so if I pick up a item a wall opens up with monsters? And how can I do it so if I kill ALL the monsters that came out of that wall another wall opens with more?

[Remmirath]

There's the wiki for these kind of actions:

http://zdoom.org/wiki/ThingCount

http://zdoom.org/wiki/ACS_Execute

The first link has a clear example of what you want to achieve.

[ThatOneZDoomer]

I have another question I don't think is worthy for a topic of it's own...

According to the wiki, when using DrawBar for health and armor, it's possible to use an inventory item to show that max that the bar will draw. Health seems to take it's max from the player, which I'm fine with, while armor seems to default to 100 max. I want the bar for armor to display over 100. Here's what I done..

Code: Select all • Expand view

      DrawBar "SHIEBAR1", "SHIEBAR2", Armor BlueArmor, Vertical, 20, 169;

However, in game, the bar is always empty, but works up to 100 if I don't include BlueArmor. By inventory item, does it mean an actual item that's a subclass of inventory? While on the subject, is it possible to display an inventory item using DrawBar? I don't think I have been able to do it without getting an error before start up.

[Henderick]

I only have another question..
In DECORATE: For example A_Explode has "bool hurtshooter" Default: true
How can I change it to false? I get an error if changed to "false" or something like this, and 0, 1 or any other numbers don't change it.