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bird.js
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bird.js
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class Bird{
constructor(){
this.position = createVector(random(width), random(height));
this.velocity = createVector(random(-1, 1), random(-1, 1));
// this.velocity.setMag(random(0.5, 1));
this.acceleration = createVector();
this.speed = 3;
this.force = 0.3;
this.r = 2;
}
// inside_region(flock){
// for(let b of flock){
// let d = dist(this.position.x, this.position.y, b.position.x, b.position.y);
// if(this!=b && d<radius){
// this.nearest_neighbour.push(b);
// }
// }
// }
//------------------------------------------------------------------------------------------------------------------------
// seperation(neighbours){
// let average_position = createVector();
// let total = 0;
// for(let b of neighbours){
// let diffrence = p5.Vector.sub(this.position, b.position);
// let d = dist(this.position.x, this.position.y, b.position.x, b.position.y);
// if(d>0){
// diffrence.div(d);
// average_position.add(diffrence);
// total++;
// }
// }
// if(total>0){
// average_position.div(total);
// average_position.setMag(this.speed);
// average_position.sub(this.velocity);
// average_position.limit(this.force);
// }
// return average_position;
// }
// cohesion(neighbours){
// let average_position = createVector();
// let total = 0;
// for(let b of neighbours){
// average_position.add(b.position);
// total++;
// }
// if(total>0){
// average_position.div(total);
// average_position.sub(this.position);
// average_position.setMag(this.speed);
// average_position.sub(this.velocity);
// average_position.limit(this.force);
// }
// return average_position;
// }
// allign(neighbours){
// let average_velocity = createVector();
// let total = 0;
// for(let b of neighbours){
// average_velocity.add(b.velocity);
// total++;
// }
// if(total>0){
// average_velocity.div(total);
// average_velocity.setMag(this.speed);
// average_velocity.sub(this.velocity);
// average_velocity.limit(this.force);
// }
// return average_velocity;
// }
//------------------------------------------------------------------------------------------------------------------------
rule1(neighbours){
let average_position = createVector();
let total = 0;
for(let b of neighbours){
let d = dist(this.position.x, this.position.y, b.position.x, b.position.y);
if(d > 0 && d < radius){
let diffrence = p5.Vector.sub(this.position, b.position);
diffrence.normalize();
diffrence.div(d);
average_position.add(diffrence);
total++;
}
}
if(total>0){
average_position.div(total);
average_position.normalize();
average_position.mult(this.speed);
average_position.sub(this.velocity);
// average_position.limit(this.force);
average_position.limit(0.4);
}
return average_position;
}
rule2(neighbours){
let average_position = createVector();
let total = 0;
for(let b of neighbours){
average_position.add(b.position);
total++;
}
if(total>0){
average_position.div(total);
average_position.sub(this.position);
average_position.normalize();
average_position.mult(this.speed);
average_position.sub(this.velocity);
average_position.limit(this.force);
}
return average_position;
}
rule3(neighbours){
let average_velocity = createVector();
let total = 0;
for(let b of neighbours){
average_velocity.add(b.velocity);
total++;
}
if(total>0){
average_velocity.div(total);
average_velocity.normalize();
average_velocity.mult(this.speed);
average_velocity.sub(this.velocity);
average_velocity.limit(this.force);
}
return average_velocity;
}
//------------------------------------------------------------------------------------------------------------------------
apply_rules(neighbours){
let force1 = this.rule1(neighbours);
let force2 = this.rule2(neighbours);
let force3 = this.rule3(neighbours);
this.acceleration.add(force1);
this.acceleration.add(force2);
this.acceleration.add(force3);
}
update(){
//this.position.add(this.velocity);
this.velocity.add(this.acceleration);
this.velocity.setMag(this.speed);
// this.velocity.limit(this.speed);
this.position.add(this.velocity);
this.acceleration.mult(0);
// boundary checking
this.position.x = (this.position.x + width) % width;
this.position.y = (this.position.y + height) % height;
}
// show(){
// noStroke();
// fill(255, 200);
// circle(this.position.x, this.position.y, 5);
// }
show() {
let theta = this.velocity.heading() + radians(90);
noStroke();
fill(175);
push();
translate(this.position.x, this.position.y);
rotate(theta);
beginShape(TRIANGLES);
vertex(0, -this.r*2);
vertex(-this.r, this.r*2);
vertex(this.r, this.r*2);
endShape();
pop();
}
}