Basic enemy AI

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78

I will see if I can add a way to ignore entities in the next update.

79

Just any entities with a “ignore tag” maybe? but also can you maybe just tell me what code to add since I already added ai to the project I am working on

80

Yes, it will be something like that. I can’t tell you what to do exactly as I first need to check and test. I expect you can do something similar as I describe in the post below.

81

Version 1.3 is released! :partying_face:

In this release a lot is changed and maybe it need to be fine tuned based on your feedback. Special thanks to @Brent_Reddick for his feedback to be able to make the right decisions and also for sharing his project to test the AI.

  • Attributes
    The available attributes are easy to use and should allow the AI ​​to work in most games.

    • View Distance
      The distance of a target is being visible.
      A view distance of zero means the enemy can’t see targets.
    • Hear Distance
      The distance of a target with Audible tag is being audible.
      A hear distance of zero means the enemy can’t hear targets.
    • Patrol Range
      The range of patrolling based on the origin.
      A patrol range of zero means the enemy will not patrol arround.
    • Combat Range
      The range of combat based on the equipment.
      A combat range of zero means the enemy will not attack.
    • Enemy Speed
      The default speed for moving and rotation.
      The actual speed of the enemy is controlled in the states.
    • Sensor Length
      The length of sensors to detect obstacles.
      The sensor length should depend on the scale and environment.
    • Sensor Height
      The height of sensors to detect obstacles.
      The sensor height should depend on the scale and environment.
    • Show sensors
      Ability to show the sensors for debugging.

  • Update Target
    This functions find the closest target for the AI based on the targets in game. You can add a new target at runtime using this.enemyTargets.push(target) or remove a target using this.enemyTargets.delete(target).

  • Update Movement
    This function moves and rotates the enemy in the direction of the destination. It avoid obstacles using the sensors. (Sinds there is no pathfinding, there are some limitations why not always the desired result can be achieved).

  • Update Animation
    This function animates your charachter based on a couple of conditions. You only have to assign the animations to the anim component and be sure it is enabled. By default no animations are used.

  • Update State
    This function only execute the current state. All other state related code is now incorporated in the specific states.

  • Enemy States
    Currently the AI has three states (patrol, chase and combat). Every state should have the information about what the AI has to do in the current state and when the AI has to change to another state.

  • Other functions
    There are a couple of other functions at the bottom of the script. One of them is the attack function, that create and fire a new bullet, when the enemy is in combat. You are free to study and change the functions.

Please note that the functions are all capitalized now, to make the script easier to read. The bullet entity is removed from the character and a template entity is used instead. The UI of the characters is removed, because it turned out that this was not used in users’ projects. I added the abiltity to ignore obstacles with an Ignore tag.

https://playcanvas.com/project/870482/overview/basic-enemy-ai

3 Likes
82

Cool!

83

Hey @Albertos I doubt you will use this, this is not a suggestion or anything, just something you might wanna check out for the ai Released: Hephauestus Grid Pathfinding

84

I just saw what the path finding does, and it kinda blew my mind, if you were somehow able to add something similar this to the ai without making it too complicated, the enemy ai would be FLAWLESS, I bet it is just wishful thinking, but if it could be added to the enemyDestination stuff. I am not saying the raycasts are not good enough, they are, but there is always room for improvement.

85

This is no longer available and was a paid solution that I couldn’t use in a public project.

I created this project because of the lack of pathfinding in PlayCanvas, not because I like the raycasts that much.

As soon as there is a better alternative, I’m happy to use it.

1 Like
86

So I can’t even buy it anymore?

87

Unfortunately, that’s correct.

2 Likes
88

I am trying to get the ai to go through the door, I tagged them all with ignore, (I’m using templates, it makes things easier, thanks) but even then he won’t could you help me out? (This is a new project btw) I already know how I plan to make him “open” doors but first I need him to go through it. Thanks in advanced

89

Also going back to the specific turn lengths, maybe not lengths but positions, my character is very wide so his arms cut into objects and stuff.

90

Also forgot, here is link lol >>> PlayCanvas | HTML5 Game Engine

91

Be aware it should be Ignore instead of ignore.

What I have seen in your previous test project is that it works perfectly fine. It are just some edge cases that I cannot prevent. Making the side sensors longer will affect the AI negatively in other cases.

1 Like
93

By the way, your doors are also a reason not the make the sensor length too long. It will faster detect the walls around the door and let the AI avoid.

1 Like
94

Got it, thanks

95

I miss turning speed, because the ai will get stuck in the spawn point (the super tiny room)

96

It goes in a back and forth motion for a while

Screenshot 2023-12-13 12.50.18 PM
Screenshot 2023-12-13 12.50.18 PM1366×768 62.3 KB

Screenshot 2023-12-13 12.50.15 PM
Screenshot 2023-12-13 12.50.15 PM1366×768 61.4 KB

97

Yes, this is also an edge case where in front and behind the AI is an obstacle. It also tells me your door is currently not ignored.

98

It is ignored, but the space is so small idk, is there a way to make the ai avoid that room completely even if the player opens the door.