xevion/Boids
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update Boid class for new Monobehavior structure

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Xevion
2020-05-16 13:05:48 -05:00
parent 5b049f2f24
commit 5b16c736ee
1 changed files with 14 additions and 22 deletions
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36
Assets/Boid.cs
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@@ -1,22 +1,13 @@
using System.Collections.Generic; using System.Collections.Generic;
using UnityEngine; using UnityEngine;
public class Boid { // Boids are represented by a moving, rotating triangle.
private Vector2 _position; // Boids should communicate with sibling Boids
private Vector2 _velocity; public class Boid : MonoBehaviour {
public Vector2 velocity = Vector2.zero;
public Boid(Vector2 position, Vector2 velocity) {
_position = position;
_velocity = velocity;
}
public void SetPosition(Vector2 position) {
_position = position;
}
// Renders the Boid. If focused, the
void Render(bool focused = false) {
void Start() {
velocity = Vector2.one;
} }
// Returns the next position the Boid will be moving to // Returns the next position the Boid will be moving to
@@ -29,23 +20,23 @@ public class Boid {
Vector2 r2 = Rule2(flock) * magnitudes[1]; Vector2 r2 = Rule2(flock) * magnitudes[1];
Vector2 r3 = Rule3(flock) * magnitudes[2]; Vector2 r3 = Rule3(flock) * magnitudes[2];
return _position + r1 + r2 + r3; return transform.position + (Vector3) (r1 + r2 + r3);
} }
// Cohesion: Steer towards center of mass of flock // Cohesion: Steer towards center of mass of flock
Vector2 Rule1(List<Boid> flock) { Vector2 Rule1(List<Boid> flock) {
Vector2 center = Vector2.zero; Vector2 center = Vector2.zero;
foreach (Boid boid in flock) foreach (Boid boid in flock)
center += boid._position; center += (Vector2) boid.transform.position;
center /= flock.Count; center /= flock.Count;
return (center - _position) / 100; return (center - (Vector2) transform.position) / 100;
} }
// Separation: Steer to avoid other Boids within flock // Separation: Steer to avoid other Boids within flock
Vector2 Rule2(List<Boid> flock) { Vector2 Rule2(List<Boid> flock) {
Vector2 c = Vector2.zero; Vector2 c = Vector2.zero;
foreach (Boid boid in flock) { foreach (Boid boid in flock) {
Vector2 diff = boid._position - _position; Vector2 diff = boid.transform.position - transform.position;
if (diff.magnitude < 5) if (diff.magnitude < 5)
c -= diff; c -= diff;
} }
@@ -56,15 +47,16 @@ public class Boid {
Vector3 Rule3(List<Boid> flock) { Vector3 Rule3(List<Boid> flock) {
Vector2 perceived = Vector2.zero; Vector2 perceived = Vector2.zero;
foreach (Boid boid in flock) foreach (Boid boid in flock)
perceived += boid._velocity; perceived += boid.velocity;
perceived /= flock.Count; perceived /= flock.Count;
return (perceived - _velocity) / 8; return (perceived - velocity) / 8;
} }
// Returns a list of boids within a certain radius of the Boid, representing it's local 'flock'
List<Boid> GetFlock(List<Boid> boids, float radius) { List<Boid> GetFlock(List<Boid> boids, float radius) {
List<Boid> flock = new List<Boid>(); List<Boid> flock = new List<Boid>();
foreach(Boid boid in boids) foreach(Boid boid in boids)
if(boid != this && Vector2.Distance(_position, boid._position) <= radius) if(boid != this && Vector2.Distance(transform.position, boid.transform.position) <= radius)
flock.Add(boid); flock.Add(boid);
return flock; return flock;
} }