Nicolai Hess wrote
This was of course wrong, I don't know what the other method computes, but not the angle between two vectors.
Yes i also wrote a test and i think my method is right. Nicolai Hess wrote
Now the question is, why do you think your method is wrong / the boids behave wrong?
When i use my method to calculate the field of vision the Boids always fly from top left to down right and if i turn on the circling option, they crowd in the bottom right quadrant. If i give them a 360 degree field of vision by always returning true for isInFieldOfVision they behave correctly. This means they fly in a nice circle around the center and if circling is turned off, the swarm flies in different directions each time you start the simulation. Perhaps the problem is not the calculation of the angle but is in the isInFieldOfVision: method... -- View this message in context: http://forum.world.st/Calculate-angle-between-two-vectors-probably-Igor-tp47... Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.