Friday, October 25, 2013

How to create a custom HUD in UDK

UTGFxHudWrapper is the wrapper that deals with the Unreal Script side of the movie or movies ie checks if they are loaded, toggles visibility etc and stores the Class of the MinimapHUDClass in it's Default properties:


GFxMinimapHud on the other hand is the Unreal script that delves deeper into the Flash movie itself:

    TeamStatsMC = GetVariableObject("_root.teamStats");
    PlayerStatsMC = GetVariableObject("_root.playerStats");
It also stores the reference to the actual Gfx movie you want to use in it's Default properties:

To create your own HUD simply extend these two classes and point to your own custom gfx movie

//CWHud .uc
class CWHud extends UTGFxHUDWrapper;

class CWMinimapHUD extends GFxMinimapHud;
The HUD is instantiated inside the PlayerController Class:
//CWPlayerController .uc
CWPlayerController extends UTPlayerController; 

reliable client function ClientSetHUD(class<HUD> newHUDType)
if(myHUD != none)
myHUD = spawn(class'CWHud', self);

Custom flying vehicle scripts

Here's the scripts from Teglegs's flying code for reference.

I don't have a model to hand but as udkc is dead I wanted to post this for prosperity, that and it's the best plug n play script I've come across.




Wednesday, October 23, 2013

How to make a custom weapon in UDK pt 2

The fastest way to get your own custom weapon is to extend what Epic have already put in place. Extending a weapon already in game is by far the best way to get started in this case we're using the Shock Rifle 'UTWeap_ShockRifle' class, In the previous post I named my shotgun model 'cw_weapon05' and imported it into my 'CWWeapons' package so the path to the skeletal mesh is 'CWWeapons.Mesh.cw_weapon05' taking a look at the CW_TestGun.uc class below shows that we only need to override the mesh, attachment class and pickup mesh.


class CW_TestGun extends UTWeap_ShockRifle;


// Weapon SkeletalMesh
Begin Object Name=FirstPersonMesh
End Object


Begin Object Name=PickupMesh
End Object


class CWAttachment_TestGun extends UTAttachment_ShockRifle;

Begin Object Name=SkeletalMeshComponent0
End Object


How to make a custom weapon in UDK

As always these are my notes and not in anyway the best way to do this. Purely the way I have done.
First off you need a gun model, I tried downloading a few free ones but as always you end up spending more time trying to crowbar whatever you find into shape, than you may have done modelling from scratch.

I created a very rudimentary shotgun shape in 3dsMax from a cylinder. Once you have this you need to add a Skin modifier to the mesh then add to this two bones. The bones will be identified in UnrealScript so if you are going to write your own then they can be whatever you want but if you're reading this then I guess we follow Epics lead.

The first bone wants to be the root bone and will ideally be inside the handle of the weapon (think of it as where the players right hand will be) the second will be along the barrel (players left hand)

These will need to be named 'b_gun_root' and 'b_gun_lefthand' Rig the bones so that all vertices are weighted completely to the 'b_gun_root' bone and none weighted to the 'b_gun_lefthand'

Following this add an Unwrap UVW and export the whole thing out as a .fbx file then go into UDK and import the fbx file into your package.

  1. Create / download 3d model
  2. Add Skin modifier
  3. Add 'b_gun_root' bone weighted to 1
  4. Add 'b_gun_lefthand' bone weighted to 0
  5. Add Unwrap UVW
  6. Export as fbx
  7. Import into custom package in UDK 

Tuesday, October 22, 2013

How to rig if you can't weight

Oh for the humanity, how many times will I forget that the weight tool in 3dsMax 2012 is bugged and requires a patch?

Well I guess that's the whole point of making these notes.

Lexluthernumber1 is still by far the best resource for in depth useful how to's for instance when all you want to know is where to stick your bone.

Wednesday, September 11, 2013

How to change UDK object properties on the fly

So what I didn't know until now is that UDK comes with a Remote Control for use when developing. This is something that will without doubt save me hours as before now it would be a case of tweaking a value, then recompiling then tweaking and recompiling over and over again, which can very quickly remove you will to live.

You can edit the properties of any object that derives from the Actor class using the editactor console command:

 editactor name=UTPawn_0

Also worth noting that if you pass trace as a param then this will display the properties of the object you are aiming directly at

editactor trace

As mentioned in the Gameplay Debugging page, this is ideal for something like fine tuning a vehicle but I guess you could go as far as tuning the lighting or pickup placements.

There are a few other commands available such as EditObject:

The editobject console command makes the properties of a specific object in the game available in the property window
editobject name=GameThirdPersonCamera_0

The editdefault console command makes the properties of a class default object available, similar to specifying a class with the editobject console command

editdefault UTProj_LinkPlasma
editdefault class=UTProj_LinkPlasma

The editarchetype console command makes the properties of an archetype available. The archetype to edit is specified by passing the path (Package.Group.Name) to the archetype following the command. Like the editdefault command, this command is also extremely useful for archetypes that are used as templates for objects that are frequently spawned, such as projectiles or units in a real-time strategy game, or for archetypes used as data definitions or content holders.
There's lot of other information in there too from data inspection to code profiling, as always the docs are there you've just got to know what you are looking for at the time.

Monday, August 19, 2013

Jesus saves...but does he back-up?

For me the save game is at the core of what I'm interested in as far as pet projects go, what you've done, who you've met, what colour key you've got in your inventory, that sort of thing. I've seen a couple of threads about it but this one I like as it goes that little bit beyond the basics of getting the file set up it also discusses serialising properties of a given object.

Thursday, May 30, 2013

UDK and Borderlands 2

There's nothing like, a glimpse of the magic or a peek behind the curtain. Day job aside it's nice to see what the basics of UDK can actually lead to. Check out the glitch video where the player breaks out of the map and finds himself stood on a very familiar checker board block, a real insight to the vastness of the level too. 

Passion never goes away