Quick Modding/Hacking Answers Thread

Have you tried the bullet functions then?

According to Noxid's List:

-=Bullets=-

004029B0 - Bullet Tile Collison, Solid	[08_X | 0C_Y | 10_???]
00402B30 - <Odd; after the main Tile collision runs, it does this check which returns which side of a tile it's hitting I think>
00402F50 - Generate effect, sound when Bullet hits wall							[08_WeaponObj]
00402FC0 - Bullet Tile Collison, Roof Slope 1
004030B0 - Bullet Tile Collison, Roof Slope 2
004031A0 - Bullet Tile Collison, Roof Slope 3
00403290 - Bullet Tile Collison, Roof Slope 4
00403380 - Bullet Tile Collison, Floor Slope 1
00403470 - Bullet Tile Collison, Floor Slope 2
00403560 - Bullet Tile Collison, Floor Slope 3
00403650 - Bullet Tile Collison, Floor Slope 4
00403740 - Bullet Tile Detection Algorithm
00403C00 - Clear All Weapon Object Slots
00403C40 - Count Weapon Shot Occurences				[08_WeaponID]
00403CB0 - Count All Slots Using Specific Shot			[08_ShotID]
00403D10 - Free All Slots Using Specific Weapon			[08_WeaponID]
00403D80 - Clear All Weapon Object Slots
00403DC0 - Render Bullets
00403F80 - Create Bullet
00404160 - Bullet 01: Snake Level 1
004043F0 - Bullet 02 - 03: Snake
004047B0 - Bullet 04 - 06: Polar Star				[08_WeaponObject | 0C_Level]
00404B30 - Bullet 07 - 09: Fireball 				[08_WeaponObject]
00405120 - Bullet 0A - 0C: Machine Gun
004055A0 - Bullet 0D - 0F: Missile Launcher
00405D80 - Explosion from missile <Bullet ID 10-12>
00405F30 - Bullet 13: Bubbler Level 1
00406190 - <Bullet 14?>
004064D0 - Bullet 15: Bubbler Level 3
004068B0 - Bullet 16: Bubble Spurs
00406BB0 - Bullet 19: Blade Level 1
00406E60 - Bullet 1A: Blade Level 2
00407110 - Bullet 1B: Blade Level 3
004075E0 - Bullet 17: Blade Slashes
004078A0 - Bullet 18
00407910 - Bullet 1C - 1E: Super Missile Launcher
00408080 - Bullet 1F - 21:
00408230 - Bullet 22 - 24, 2B: Nemesis
00408710 - Bullet 25 - 27
00408AE0 - Bullet 28 - 2A
00408F40 - Bullet 2C: Spur Level 2
00408F90 - Bullet 2D: Spur Level 3
00408FC0 - Runs Bullet AI
00409190 - Bullet 14: Bubbler Level 2 (?)
004095C0 - <Related to Bubbler?>

Also, I have what may be a slightly stupid question but.... in a weapon function, how would I check if a specific flag is set or not?

 

I'm quite aware of that, but I don't fully trust label systems.


Also, question:

Are the little bats that hover around Orangebell independent of Orangebell, or are they part of the same function? Reason is, I need bats that will attack/chase the player but don't drop exp (and there's no room to edit one of the existing bats)

Those bats are dependent of the parent entity and will crash if they haven't got a parent. That being said, it may be possible to have them be child to something other than orangebell..

Have you tried the bullet functions then?

Also, I have what may be a slightly stupid question but.... in a weapon function, how would I check if a specific flag is set or not?

You mean normal old flags? There's a function for that.

0040E930 - Check Flag (Returns 1 or 0)
The param is (int flag).

 

Anyway to make the polar star literally shoot tiles?

 

Anyway to make the polar star literally shoot tiles?

Of course there is.
Assembly.

 

The EXE file? If it was, then I don't think Sue's Workshop would have worked on it, and it did.

I think someone mentioned this, but the EXE is a specific file format (PEF or something) that Resource Hacker knows how to read; Sue's Workshop, however, does not save as a valid PEF executable when editing, so Resource Hacker looks and the file and thinks it is damaged or something.

Short answer: Never use Sue's Workshop if you can avoid it.

 

Of course there is.
Assembly.

The roller enemy automatically changes the tile it's on when it's spawned. (Changing it to 00, which is nothing) Typically on almost (maybe all?) tilesets, the next number, 01, is a solid block. If you use the roller enemy's code as a basis, you should be able to modify the collision part of the bullet to change whatever tile it collides with. That's not really 'shooting' tiles, though. If you can check which side the tile was hit on, then shift one unit away, and change that tile... then the polar star would 'shoot tiles'. Of course, you could really, REALLY screw up an area with such a weapon, unless the tiles were somehow temporary, or destructible.

It'd probably be better to make an ice weapon that instead of damaging an enemy, turns them into a different NPC that's just a frozen block... but pass the NPC's number to the ice block NPC, so if it's destroyed/thawed/whatever it can turn back into the original NPC type.

 

You wouldn't necessarily need change the end-block only, you could make an invisible damageless bullet that each step does something like this:

xx = x /10
yy = y/10
if xx != xp or yy != yp {
t[xx,yy] = v*
v = t[xx,yy]
t[xx,yy] = 1
}

xp = xx
yp = yy

//apply constants

But that would yield a sorta jumpy looking thing. With smoke effects however, you could make it look like the tetris blocks in wtf.

I don't actually remember how the tiles work off the top of my head, but I'm assuming they make a 2d array of roomwidth by roomheight in tilesizes. If it allowed individual xs/ys, you could actually make a gun easily.

I was planning on doing something like this for a mod. Who knows?

Also, people, please refrain from making posts like "with assembly! hurr...." it isn't helpful.


*This use of a variable storing the original tile could also be used to make a time-out if you wanted to have that (and not wreck the map, as you mentioned in your post).

 

Been looking for the up to date profile.dat hacking guide/lexicon for a while now. Can't seem to find it. If anyone has it, I'd appreciate being tossed a link.

 

I don't think there is a more up-to-date version. The most recent one I have is from 2006. Maybe celtic will have more info because of his save converter? He'd be my first stop if i wanted to know more.

 

Hello, I would like to decrease the number of falling blocks (entity #294: Quake + Falling Blocks generator, used in the map Hell2 for example), is it possible?

 

The blocks fall indefinitely, but it would be possible to decrease the freqency at which they occur

00461ACC |. 8378 78 18 CMP DWORD PTR [EAX+78],18

Change the 18 to a number larger than 18 to increase the timer.
Alternatively, the hex address is 0x61ACF

 

Now that you mention it, are their velocities easily editable?

 

as easily as anything else.
the blocks themselves are a separate entity from the spawner of course.

 

The blocks fall indefinitely, but it would be possible to decrease the freqency at which they occur

00461ACC |. 8378 78 18 CMP DWORD PTR [EAX+78],18

Change the 18 to a number larger than 18 to increase the timer.
Alternatively, the hex address is 0x61ACF

Yeah, I meant the frequency, sorry.
Thanks for the information. Do you think it's also possible to put something like the Entity ID address instead of 18? Like that I could choose the frequency I want each time I use the generator...

 

You'll have to make the following changes:


00461AC9 8B4A 2C MOV ECX,[EDX+2C]
00461ACC 3948 78 CMP [EAX+78],ECX
00461ACF 90 NOP

That should do it.

 

Hmmm, it makes the game crash.

 

Oh whoops, the 2nd one should be CMP [EDX+78], ECX

 

... Doesn't work either.
You don't have to worry anymore about that (unless you want to, in that case I'll keep the solution in my archives for it can be useful), I have another idea. Thanks for your help anyway!

 

I don't know off of the top of my head what happens before that, but make sure you're moving in arg1 before taking the local var.

 

Melee Weapon

I decided to try making the Blade into an actual melee weapon, and it's actually going pretty well. I figured out it's mostly an issue of fine-tuning it to look nice. One small problem is the little star-shaped explosion whenever you swing the sword... I don't want it there. I could just delete it from Caret.bmp, but I want it to appear for everything else. So does anyone know how to make that not show up? Preferably not using assembly hacking, but whatever works is good.