Johnsmith's Profile

- johnsmith
- - Joined 21 Jun, 2013
  - 18 topics • 75 posts
- 1
- 19 Oct, 2013
- Quote
Well thanks for your help mindfaQ

But unfortunately that doesnt work for what I want to do as I keep modifying the bullet angle of motion, that's why I was going for a "set X,Y" event instead..this way the bullet behaviour is not altered and can continue doing his stuff..

Also there is a problem in your example as the enemy still goes through walls from time to time..

I think the detectors I'm using was a bad idea, and maybe I can trigger the "set X,Y" with something else (like the overlapping at offset ?) but as I said, Im kinda lost with how to change the cosinus formula..

If anyone got an idea, I'd be glad to hear it ! :)
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- johnsmith
- - Joined 21 Jun, 2013
  - 18 topics • 75 posts
- 1
- 18 Oct, 2013
- Quote
Yes they are straight walls, with atm only 90�angles (for floor, side wall & ceiling), but ideally I would also like to have some more fancy angles later..

I've found a formula on this forum about Cosinus & sinus (which I dont really understand..but it's working so far). Im applying it with the help of 2 detectors for X & Y pinned to my ennemy and the event looks like this:

Detector X overlapping wall

--> Enemy set X to self.x-cos(self.Bullet.AngleOfMotion)*self.Bullet.Speed*dt

Detector Y overlapping wall

--> Enemy set Y to self.Y-sin(self.Bullet.AngleOfMotion)*self.Bullet.Speed*dt

That works...but there is still a problem when this happens:

(orange rectangle is Y detector, blue is X)

<img src="http://i.imgur.com/Qh79369.jpg" border="0" />

There, the enemy will just get stuck (if not worst)...as the wrong detector got triggered first.. :/

And if I make both detectors the same size to cover the 4 corners "holes" then it doesnt work at all as they are both triggered at the same time...

I dont know what to do here, I've tried many things but unsuccesfully so far..and as I dont really understand that cosinus formula It's hard for me to "tweak" it, so if anyone could help me on this that would be great, thanks.
- johnsmith
- - Joined 21 Jun, 2013
  - 18 topics • 75 posts
- 1
- 15 Oct, 2013
- Quote
Hello,

I have an enemy with the bullet behaviour.

When he sights the player, his angle goes toward the player.

But if the distance between the player & enemy < 200, his angle changes to angle(playerXY,EnemyXY)+90 or -90, this way he starts to randomly turn around the player.

My problem is when he collides with a wall...I'm preventing collision by using the "bounce off solid" but this gives a pretty bad result as the eneymy keep colliding itself against the wall (until randomly changing his angle again).

So I was wondering, can I make it so the enemy slide against the wall (in the appropriate direction regarding his current angle of motion) instead of colliding with it ? How would I do that ?

Or if you have any other solution to make it so the enemy avoids walls, I'm interrested.

Thanks by advance for your help ! :)