jiaozrr / testinggroundsfps

This is the last course session to Udemy Unreal Course.

TestingGroundsFPS

This is the last course session to Udemy Unreal Course.

1 First Commit

The first commit is to align with the course ep.

2 GDD (Game Description Document)

Description

• 2.1 You can pass a testing ground undetected
• 2.2 If detected, you must clear the area
• 2.3 Checkpoints save when you pass to a new area
• 2.4 If killed you return to the last checkpoint
• 2.5 You and enemies fight for same ammo reosources
• 2.6 You are scored on how many areas you can pass

Requirement

• 2.7 Testing ground landscape(s)
• 2.8 Unreal starter content + landscape tools
• 2.9 2 guns, and 2 ammo box types
• 2.10 A rigged humanoid character we can modify
• 2.11 Various SFX
• 2.12 Other stuff

Challenge

• 2.13 Serialization when saving
• 2.14 Checkpoint system architecture
• 2.15 Smooth network for co-op play
• 2.16 Procedural generation of testing grounds
• 2.17 Creating a new skeletal animation

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3 Markdown & Market Decoration

• HASH "#" stands for title
• START "*" stands for item
• DASH "---" stands for line break

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4 Git clean -x -d -i

• Using git clean -x -d -i in terminal can clean the files in gitignore to avoid any impact when doing the code reverse.

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5 Target Points

• Target point array is to assign an agent to patrol around these target locations.
• By implementing these target points, AI behaviour tree and blackboard are often used.

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6 Assets Grouping

• Layers are often for visibility. One assets can be assigned to multiple layers.
• Groups are often for batch operation and fast multi selection.
• Tags are ... not sure what are the advantages... probably for tracking in the CPP???
• Parent Empty Actors are often for iterating the children and for batch moving.
• Folders are often to organize the hierachy.

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7 Behavior Tree

• Behavior tree is using a sequence module to switch the index cycle and the move to action. Index cycle is made in blueprint.

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8 Performance Profiling

• Using blueprint can drag system running slow. In order to check the load/consume of each function/method in the blueprint/cpp. Performance profiling is a good way.
• Window -> Developer Tools -> Frontend Session.

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9 EditInstanceOnly vs EditAnywhere vs EditDefaultsOnly

• EditAntwhere means the variable can be modified either in the blueprint, or in the instance generated (inherited) by the blueprint.
• EditDefaultsOnly means the variable can be only modified in the blueprint.
• EditInstanceOnly means the variable can be only modified in the instance generated.

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10 Graphs in an animation blueprint

• EventGraph is much like the other event graghs in the blueprint where the variables are mostly set up here.
• AnimGraph is to set which animation should be applied to the skeleton. State machine can be used to switch in between different states.

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11 About Blackboard

• Blackboard is like a dictionary where a "key-value" combo is always set.
• When you need to SET a blackboard value, you always need to "Set value as xxx", and assign it with a key and their true value.
• When you need to GET a blackboard value, you alwasy need to "Get value as xxx", and feed it with a key name and the value would return accordingly.
• When dealing with a behavior tree at the same time, the key to the SETTER and the GETTER can be different as usually a BTtask would be created.
• Therefore, the SETTER key (KEY_SETTER) and the GETTER key (KEY_GETTER) would be matached at the BTtask assign interface.

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12 Map out the source codes

• TODO map out how the NPC is sharing same movement component (especially rotation) with the human player.

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13 SetFocus

• Compared with SetFocusPoint, SetFoucs has more ability where an actor can be used as a target "point".
• Pitch angle will also be used to SetFocus.
• However, please do remember to tick Pawn->Use Controller Rotation Pitch / Yaw and Roll!
• The aiming point seems to be the actor bottom point.

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14 Services

• If you want to do something repeatly, use service.

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15 lfs and git

• Change track file: .gitattibutes
• Fresh lfs cache (to make files untracked from LFS): git rm --cached -r "PATH/."
• Re-add lfs files: git -add "PATH/."

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16 IK

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17 Extract old version blueprint

• $ git show "SHORT_ID":"PATH" | git lfs smudge > "PATH" (to generate the old blueprint)

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18 Animation slot

• Animation slot is a placeholder to feed in the animations. (to make 1 mesh listens to 2 parts: animation slot overrides the states machine)
• Layer blend per bone is a good way to seperate the bone animation in the structure where it can makes the upper body running 1 animation with the lower body not impacted.

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19 Github Pull & Push test

No other aims. Just for testing. No other aims. Just for testing, too.