It takes a lot to make an interesting and challenging enemy AI. As of now, enemy detection is based on whether the player is
- in the enemy’s view cone,
- in his line of sight, and
- if there’s enough light falling on the player
Once the player is detected, enemy’s state changes to AlertState::ALERT and if the player stays in view for a certain amount of time (I set it as 2s for now) player gets spotted.
I want to add sound based detection as well.
Also, the way the enemy viewcone is displayed is not intuitive now. I want it to be visible only when the enemy is in sight of the player. And ofcourse it should be limited to what’s actually in sight. Now as you can see, the viewcone doesn’t care about walls.
And as for lighting, you just set the position of the light and it gets turned on at that point. Lighting uses the same visiblity function to find where it falls, limited by a distance limit. The implementation is just setting the alpha value of the vertex.color at all points to zero. And that’s what the enemy checks for to see if there’s enough light on the player. The lightMap is stored as 8 bit tiles (a vertexarray of Quads in SFML) as 32 bit is too rough. But I intend this as just for the sake of AI. I’ll have to add a different way to show the light in a visually pleasing way.
