JS_Projects/carDrivingNeuralNet/ray.js
Dawid Pietrykowski 25a12f221e Initial commit
2022-11-09 23:34:49 +01:00

87 lines
2.9 KiB
JavaScript
Executable File

class Ray {
constructor(xorigin, yorigin, angle, sight) {
this.origin = createVector(xorigin, yorigin);
this.direction = p5.Vector.fromAngle(angle); //createVector(xdirection, ydirection);
this.length = sight;
this.hit = 0;
this.intersections = [];
this.closestIntersection;
}
show() {
if (this.hit >= 1) {
stroke(130);
line(this.origin.x, this.origin.y, this.closestIntersection.x, this.closestIntersection.y);
push();
noFill();
stroke(100);
strokeWeight(10);
ellipse(this.closestIntersection.x, this.closestIntersection.y, 7, 7);
pop();
} else {
push();
noFill();
stroke(75);
strokeWeight(1);
line(this.origin.x, this.origin.y, this.origin.x + this.direction.x * this.length, this.origin.y + this.direction.y * this.length);
//line(this.origin.x, this.origin.y, mouseX, mouseY);
pop();
}
}
cast(wall) {
if (wall) {
const x1 = this.origin.x;
const y1 = this.origin.y;
const x2 = this.origin.x + this.direction.x * this.length;
const y2 = this.origin.y + this.direction.y * this.length;
//const x2 = mouseX;
//const y2 = mouseY;
const x3 = wall.a.x;
const y3 = wall.a.y;
const x4 = wall.b.x;
const y4 = wall.b.y;
const den = ((x1 - x2) * (y3 - y4) - (y1 - y2) * (x3 - x4));
if (den == 0) {
return;
}
const t = ((x1 - x3) * (y3 - y4) - (y1 - y3) * (x3 - x4)) / den;
const u = -((x1 - x2) * (y1 - y3) - (y1 - y2) * (x1 - x3)) / den;
if (t >= 0 && t <= 1 && u >= 0 && u <= 1) {
this.hit++;
this.intersections.push(createVector(x1 + t * (x2 - x1), y1 + t * (y2 - y1)));
}
this.distance = Infinity;
if (this.intersections && this.intersections.length) {
if (this.hit) {
for (let i = 0; i < this.intersections.length; i++) {
if (p5.Vector.dist(createVector(x1, y1), this.intersections[i]) < this.distance) {
this.closestIntersection = this.intersections[i];
this.distance = p5.Vector.dist(createVector(x1, y1), this.intersections[i])
}
}
}
}
} else {
if (this.hit >= 1)
return this.distance;
else
return null;
}
}
}
function distanceFromVectors(v1, v2) {
//var distance = abs(v1.x - v2.x) + abs(v1.y - v2.y)
var distance = sqrt(sq(v1.x - v2.x) + sq(v1.y - v2.y));
return distance;
}