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Features the demo should include:  
Features the demo should include:  
* two levels (to test normal level load routine and level streaming [https://docs.unrealengine.com/en-US/Engine/LevelStreaming/HowTo/index.html (T)])
* two levels (to test normal level load routine and level streaming [https://dev.epicgames.com/documentation/en-us/unreal-engine/level-streaming-how-tos?application_version=4.27 (T)])
* skydome [https://www.youtube.com/results?search_query=ue4+skybox (V)]
* skydome [https://www.youtube.com/results?search_query=ue4+skybox (V)]
* lightning
* lightning
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* HUD ("circular" health bar, item slots)
* HUD ("circular" health bar, item slots)
** [https://web.archive.org/web/20181006203834/https://wiki.unrealengine.com/Unreal_Motion_Graphics_(UMG)_UI_-_Inventory_Tutorial_Playlist (T)]
** [https://web.archive.org/web/20181006203834/https://wiki.unrealengine.com/Unreal_Motion_Graphics_(UMG)_UI_-_Inventory_Tutorial_Playlist (T)]
* background music [https://docs.unrealengine.com/en-US/Engine/Audio/index.html (D)] [https://docs.unrealengine.com/en-US/Engine/Matinee/HowTo/MHT_7/index.html (T)] [https://www.youtube.com/results?search_query=ue4+background+music (V)]
* background music [https://dev.epicgames.com/documentation/en-us/unreal-engine/WorkingWithMedia/Audio/?application_version=4.27 (D)] [https://dev.epicgames.com/documentation/en-us/unreal-engine/playing-animations-and-sounds?application_version=4.27 (T)] [https://www.youtube.com/results?search_query=ue4+background+music (V)]
* save game state
* save game state
* read game state
* read game state
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* functional animations
* functional animations
** character h2h (force-sensitive) (a.k.a physical animation component)
** character h2h (force-sensitive) (a.k.a physical animation component)
**:[https://www.youtube.com/watch?v=2AapLKCntvc (V)]
**:<nowiki>https://www.youtube.com/watch?v=2AapLKCntvc (V)</nowiki (dead link)
** character h2h
** character h2h
**:[https://www.youtube.com/watch?v=2QakhD03d9M (V)]
**:[https://www.youtube.com/watch?v=2QakhD03d9M (V)]
** hit reaction
** hit reaction
**:[https://www.youtube.com/watch?v=f9z7N50wu7s (V)]
**:<nowiki>https://www.youtube.com/watch?v=f9z7N50wu7s (V)</nowiki> (dead link)
**:[https://www.youtube.com/watch?v=3lPSKA0hpdc (V)]
**:<nowiki>https://www.youtube.com/watch?v=3lPSKA0hpdc (V)</nowiki> (dead link)
** minimum TRAC-TRAM integration II (combat idle, punch, kick, block, half-damage, unblockable, super)
** minimum TRAC-TRAM integration II (combat idle, punch, kick, block, half-damage, unblockable, super)
** minimum TRAC-TRAM integration III (throws)
** minimum TRAC-TRAM integration III (throws)
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**:[https://www.youtube.com/watch?v=-oGDDIbvQ1c (V)]
**:[https://www.youtube.com/watch?v=-oGDDIbvQ1c (V)]
** cover (AI)
** cover (AI)
**:[https://www.youtube.com/watch?v=nh30nt0wSjs (V)]
**:<nowiki>https://www.youtube.com/watch?v=nh30nt0wSjs (V)</nowiki> (dead link)
* healing by hypo and level areas
* healing by hypo and level areas
* particle (attachable to env, weap, char)
* particle (attachable to env, weap, char)
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** YOLO +: YOLO plus the games has never been played before. first play after installation. This is a secrete achievement.
** YOLO +: YOLO plus the games has never been played before. first play after installation. This is a secrete achievement.


Besides from what all should be tested and made, here's a groundwork tutorial: [https://docs.unrealengine.com/en-US/Resources/Templates/ThirdPerson/index.html Blueprint 3rd Person Game]
Besides from what all should be tested and made, here's a groundwork tutorial: [https://dev.epicgames.com/documentation/en-us/unreal-engine/third-person-template?application_version=4.27 Blueprint 3rd Person Game]


It touches pretty much stuff in those 4 hours: getting a character into a level, setting him up as player, the controls, animations cycles, animation blending, animation overlay and attaching physics
It touches pretty much stuff in those 4 hours: getting a character into a level, setting him up as player, the controls, animations cycles, animation blending, animation overlay and attaching physics
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# For content creation you maybe want to use [[Blender]] since it is free and available for PC, Mac and Linux.
# For content creation you maybe want to use [[Blender]] since it is free and available for PC, Mac and Linux.
# Install Visual Studio 2017 Community (to write C++ later)
# Install Visual Studio 2017 Community (to write C++ later)
# Register at https://www.unrealengine.com/en-US/, while logged in you can download the installer from the upper right corner. (Blue button "DOWNLOAD".)
# Register at https://www.unrealengine.com/en-US, while logged in you can download the installer from the upper right corner. (Blue button "DOWNLOAD".)
# Start Installer and download Unreal Engine 4.17.1 (It will be about 6 GB. It extracts to 17 GB.)
# Start Installer and download Unreal Engine 4.17.1 (It will be about 6 GB. It extracts to 17 GB.)
# Learn viewport navigation from the yellow flashing blue hat icon.
# Learn viewport navigation from the yellow flashing blue hat icon.
# Then continue with the videos of the [https://docs.unrealengine.com/en-US/Resources/Templates/ThirdPerson/index.html 3rd Person Game tutorials.]
# Then continue with the videos of the [https://dev.epicgames.com/documentation/en-us/unreal-engine/third-person-template?application_version=4.27 3rd Person Game tutorials.]


===Tutorial summary: 3rd Person Game===
===Tutorial summary: 3rd Person Game===
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====Meshes====
====Meshes====
[[Image:UE4_StaticOniMesh.png|400px|right|thumb]]
Since '''OniSplit outputs 3D meshes mostly as Collada (DAE)''' - and few as Wavefront (OBJ) - you cannot transfer objects from Oni to UE4 directly.
'''Creating FBX'''
You either need the '''[https://aps.autodesk.com/developer/overview/fbx-converter-archives FBX converter]''' or [[Blender]] to convert the Collada to FBX file format.
=====Reimports (Furniture)=====
The CJBO files include a furniture file. But this can be mostly garbage - or empty. Instead the furniture is baked into AKEV. The meshes have flags which allow OniSplit to extract these objects again.
Onisplit -extract:dae level1_Final level1_Final/AKEV*.oni
In the past this created a bunch of DAE files:
EnvWarehouse_bnv.dae
EnvWarehouse_cons.dae
EnvWarehouse_door.dae
EnvWarehouse_furn.dae
EnvWarehouse_env.dae
EnvWarehouse_env_markers.dae
EnvWarehouse_script_X.dae
EnvWarehouse_trig.dae
other.dae
At some point _furn might be extracted as part of _env. The cause for this is unknown.
'''Importing FBX'''
The scaling of OniSplit DAE files is too small. '''Use a factor of 10 to fix it.''' If we wanted to do a mass-import we would need a tool or a Blender script that alters the DAE (XML) data in advance. (Or maybe some python magic for the UE4 editor can help here too.)
Warehouse boxes from level 1 (and others objects) do only have 5 sides. Writing a macro for XSI/Blender COULD possibly add a 6th side automatically.
'''Placing individual furniture assets into levels'''
After dragging the assets into the level we need to reposition them all to 0, 0, 0 as the pivot point is used inside the FBX to save their relative position the level.
'''Optional: Asset library'''
Besides re-imports of furniture, objects could be added to a new asset library. For the later case [https://www.youtube.com/watch?v=N1h5mMviSKs resetting the pivot point of meshes (V)] can be useful.
'''Object instances'''
If we would import an entire furniture file to UE4 it would create the objects as they are: for each object one mesh. That is inefficient as many objects are simply duplicates, although textures and materials are created only once.
To bypass this inefficiency scripting is needed.
U_freight_wht_long_7412
U_freight_wht_long_7413
Ending numbers such as "_7412" seem to be the CJBO id. (See [[XML:AKEV#AGQG|AGQG <ObjectId>]])
For example a script would export the furniture "U_freight_wht_long" and save the position of all instances to a text file. UE4 would need the import the FBX once and read that text file to place them all in the level. The problem is that rotations are all reset to 0. It might be possible to define some kind of reference and read the first vertex of each object, reading the different rotation and saving this to the text file as well.
A text file (txt/csv/json/xml) might store this data:
<asset name="U_freight_wht_long" cjboId="7412" pos="x,y,z" rot="x,y,z" />
<asset name="U_freight_wht_long" cjboId="7413" pos="x,y,z" rot="x,y,z" />
If we import a level 1 '''furniture file as it is''', it creates 366 meshes, 66 textures/materials, resulting in a total '''498 "uassets" 45 MB''' in disc space. The process takes all cores to get the job done, first import, about one or two minutes on a modern CPU.
'''Some possibilities of preparing FURN'''
{| class="wikitable"
|-
! Method !! Notes
|-
| XSI scripting || considered "deprecated" by community
|-
| Standalone python || splitting DAE (mostly XML)
|-
| Blender scripting || -
|-
| UE4 editor scripting || importing XML/CSV list for instances of meshes
|}
'''Adding door locklight particle to assets?'''
Some objects such as door locklight are meant to have particles. Oni happened to store some  particle in '''ONLV''', however the door locklight have been moved to the '''CJBO particle collection'''. That's something to keep in mind. If we want to add particle to the static meshes we would need to turn them into full-fledged blueprint assets.
ONLVlab.xml (locklight particle example)
    <ENVP id="6">
        <Particles>
            <ENVPParticle>
                <Class>locklight</Class>
                <Tag>lock1_locklight01</Tag>
                <Transform>-1 -4.559326E-08 -1.34529964E-05 1.34529973E-05 -2.03512554E-05 -1 4.53194744E-08 -1 2.03512554E-05 643.527 13.0480433 -275.8361</Transform>
                <DecalScale>1 1</DecalScale>
                <Flags></Flags>
            </ENVPParticle>
'''Green collision boxes'''
Although the green collision boxes are imported with transparency they are not completely invisible. We could either:
* remove the collision box (scripting)
** then tick checkbox in FBX import dialog "Auto Generate Collision"
* modify the texture "_marker_barrier"
* modify the material "MaterialLibrary__marker_barrier"
** change Opacity from Texture Sample to a scalar or vector 3 node (0,0,0 for black = fully transparent)
Since in Oni the '''green collision box is meant for characters how do we deal with particle collisions?'''
=====Custom collision boxes=====
=====Custom collision boxes=====
In an 3D editor create collision objects and name it beginning with "UCX_". Save objects and collision objects together in one FBX file.
In an 3D editor create collision objects and name it beginning with "UCX_". Save objects and collision objects together in one FBX file.
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=====Reimports=====
=====Reimports (AKEV core geometry)=====
[[Image:UE4_StaticOniMesh.png|400px|right|thumb]]
'''IIRC, Edt said you need to carefully pick the options while importing''' core geometry as rooms with otherwise open doors can be blocked for character locomotion.
Since OniSplit outputs 3D meshes mostly as Collada (DAE) - and few as Wavefront (OBJ) - you cannot transfer objects from Oni to UE4 directly.
 
For destructive environment / Chaos system a modular core geometry might be better. However, this would require scripting again to split geometries apart.
 
In XSI we can relative easily see where an object has "polygon clusters" and associated textures. (Select a polygon cluster in wireframe mode while having an Image panel open.)
 
Whether this can be an alternative to Edt's workflow only major '''testing''' can show whereby the geometry is extracted as usual...
 
Onisplit -extract:dae level1_Final level1_Final/AKEV*.oni
 
... and loaded into an 3D editor ...
 
EnvWarehouse_env.dae
 
A rough splitting could be done by looping over the polygon clusters
 
' XSI (VBS) scripting
for each n in selection(0).activeprimitive.geometry.clusters
  logmessage (n.name)
next


You either need the [http://usa.autodesk.com/adsk/servlet/pc/item?siteID=123112&id=22694909 FBX converter] or [[Blender]] to convert the Collada to FBX file format.
Loop content:
' basic test with Polygon75 instead of n.name
SelectObj "world.polymsh.cls.Polygon75"
SelectMembers "world.polymsh.cls.Polygon75"
' poly arg can be blank, in that case active selection is taken
' ExtractFromComponents "ExtractPolygonsOp", "world.poly[12653-12730]", "polymsh_extracted", , siPersistentOperation, siKeepGenOpInputs
ExtractFromComponents "ExtractPolygonsOp", , "polymsh_extracted", , siPersistentOperation, siKeepGenOpInputs


Also the scaling is too small. Use a factor of 10 to fix it. If we wanted to do a mass-import we would need a tool or a Blender script that alters the DAE (XML) data in advance. Also boxes do only have 5 sides. Writing a macro to fix that would be more spicy. I'm not sure if it is worth the effort to write one.
After the level has been broken down into pieces it could be save as DAE and then converted to FBX.




Tips and tricks:
'''Baked-in furniture'''
* Reset pivot of meshes [https://www.youtube.com/watch?v=N1h5mMviSKs (V)]


At unknown constellation OniSplit outputs the "_env" file with furniture from level one (Syndicate Warehouse). This needs double-checking. Is a newer OniSplit or .NET/Windows 10 version to blame?


====Sockets====
====Sockets====
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In the following there is code that let's you pickup Hyposprays (1 + 2) and use them to regain health (3 + 4).
In the following there is code that let's you pickup Hyposprays (1 + 2) and use them to regain health (3 + 4).


Caution: This script is different from the others as the the pickup key press event is located in the level blueprint. Normally key press events are found in the the character blueprint. We will probably want to change that in a future version though I don't know how yet. --[[User:Paradox-01|paradox-01]] ([[User talk:Paradox-01|talk]]) 21:03, 16 December 2017 (CET)
Caution: This script is different from the others as the pickup key press event is located in the level blueprint. Normally key press events are found in the character blueprint. We will probably want to change that in a future version though I don't know how yet. --[[User:Paradox-01|paradox-01]] ([[User talk:Paradox-01|talk]]) 21:03, 16 December 2017 (CET)


If you add a trigger volume to your hypospray object it will act like a new collision box. This can be used to adds some tolerance to the pickup distance. Otherwise the character has to be not just really close but to actually overlap the object.
If you add a trigger volume to your hypospray object it will act like a new collision box. This can be used to adds some tolerance to the pickup distance. Otherwise the character has to be not just really close but to actually overlap the object.
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</gallery>
</gallery>


Youtube: [https://youtu.be/y4sxRP-GrVQ Oni UE4 Test #2 - picking up hyposprays and using them]
Youtube: <nowiki>https://youtu.be/y4sxRP-GrVQ</nowiki> Oni UE4 Test #2 - picking up hyposprays and using them (dead link)


'''Todo'''
'''Todo'''
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Health and overhealth points have different densities which results in different grow speeds on the artwork.
Health and overhealth points have different densities which results in different grow speeds on the artwork.


To recreate a similar behavior we can let the normals health points fill the health bar with a speed of 1.5 while overpower is the sum of normal health * 1.5 plus health over 100% * 0.5. Since the the health bar isn't a full circle we tweaking the second factor to about 0.44.
To recreate a similar behavior we can let the normals health points fill the health bar with a speed of 1.5 while overpower is the sum of normal health * 1.5 plus health over 100% * 0.5. Since the health bar isn't a full circle we tweaking the second factor to about 0.44.




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* Construct event -> Get HealthImage, Get Dynamic Material, set Dynamic Material variable, Get Player Character, Cast to ThirdPersonCharacter, Target MaxHealth, Set Progress (call function)
* Construct event -> Get HealthImage, Get Dynamic Material, set Dynamic Material variable, Get Player Character, Cast to ThirdPersonCharacter, Target MaxHealth, Set Progress (call function)


* Custom event -> Set Progress (with a float input), Get Dynamic Material, Set Vector Parameter Value (Parameter name ("Color") from your material), add lerp(linearColor) to SVPV node, add vector color variables to lerp node (here we can add more logic to recreate [[XML:ONGS#detailed_explanation_of_the_health_display_meter|ONGS' <Color> tags]])
* Custom event -> Set Progress (with a float input), Get Dynamic Material, Set Vector Parameter Value (Parameter name ("Color") from your material), add lerp(linearColor) to SVPV node, add vector color variables to lerp node (here we can add more logic to recreate [[XML:ONGS#The_health_display_meter|ONGS' <Color> tags]])


Displaying the widget to screen and creating a reference ...
Displaying the widget to screen and creating a reference ...
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[...]
[...]
====Tables and structures====
* Data tables are created based on previously defined structures. So these two file types are best seen as a tandem to get things done.
* Structures can be made to provide default values so that new tables will have those after creation. This might be suitable for new ONCC.
* Structures can be nested.
** Wtih version 4.25, the editor and engine might need a few restarts before an new structure is usable by an older one.
** With version 4.26, this bug doesn't seem to appear anymore.
* '''Tables can be exported to csv and json''' whereby json would be the more human readable form for complex, nested structures.
** Exporting and examining tables help you understand how to programmatically create such structured tables.
* Tables can be imported by using the import button or drag and drop.
* Tables can be reimported by rightclicking then Reimport (remembers file location) or Reimport With New File.
** Reimports (converting raw data files to assets) can be done with python and probably other methods.


====Widgets====
====Widgets====
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Summary:
Summary:
* if you need a free spreadsheet program [https://www.libreoffice.org/download/download/ you can download Calc, it is part of LibreOffice], or use Google Sheets
* if you need a free spreadsheet program [https://www.libreoffice.org/download/download-libreoffice/ you can download Calc, it is part of LibreOffice], or use Google Sheets
* '''create a csv''' file with the first cell of first column (A1) being empty and the other lower cells (A2, A3, ...) to be unique in name
* '''create a csv''' file with the first cell of first column (A1) being empty and the other lower cells (A2, A3, ...) to be unique in name
* Calc: save file, check "edit filter settings", save csv with comma as field delimiter
* Calc: save file, check "edit filter settings", save csv with comma as field delimiter
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Stuff that might be useful later...
Stuff that might be useful later...
* https://docs.unrealengine.com/en-US/BlueprintAPI/Utilities/Text/FindStringTableIDandKeyfromText/index.html
* https://dev.epicgames.com/documentation/en-us/unreal-engine/BlueprintAPI/Utilities/Text/FindStringTableIDandKeyfromText?application_version=4.27
* https://docs.unrealengine.com/en-US/BlueprintAPI/Utilities/Text/MakeTextfromStringTable_Advanced/index.html
* https://dev.epicgames.com/documentation/en-us/unreal-engine/BlueprintAPI/Utilities/Text/MakeTextfromStringTable_Advanced/?application_version=4.27
* https://answers.unrealengine.com/questions/607039/how-to-localise-with-string-tables-in-blueprints-o.html
* https://forums.unrealengine.com/t/how-to-localise-with-string-tables-in-blueprints-only-project/395329


Importing data tables is cool but unfortunately I haven't see a way to create text and image fields programmatically to the editor. --[[User:Paradox-01|paradox-01]] ([[User talk:Paradox-01|talk]]) 22:52, 11 February 2018 (CET)
Importing data tables is cool but unfortunately I haven't see a way to create text and image fields programmatically to the editor. --[[User:Paradox-01|paradox-01]] ([[User talk:Paradox-01|talk]]) 22:52, 11 February 2018 (CET)
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You can now play the game.
You can now play the game.


:https://answers.unrealengine.com/questions/37357/how-do-i-create-a-exe-of-my-game.html
:https://forums.unrealengine.com/t/how-do-i-create-a-exe-of-my-game/282120


====Exit the game====
====Exit the game====
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