在网站https://omegalords.ga/world/test.html上，我有一个代码，可以向目标计算1个单位。在代码中，斜率为1.因此跳转到的下一个点的x和y应该相同。为什么它会在某些时候发生变化而且会有2个坐标。我已经运行了数字，但它没有正常工作。有人可以解释一下吗？
</canvas>
<script>
var canvas = document.getElementById("myCanvas");
var ctx = canvas.getContext("2d");
var findDis = function(x1,y1,x2,y2){
//Finds distance rounded to the nearest 1000th
return Math.trunc(((Math.sqrt((x1-x2) * (x1-x2) + (y1-y2) * (y1-y2)))*1000))/1000
}
var findIntersections = function(b,a,m,r){
var Fraction = algebra.Fraction;
var Expression = algebra.Expression;
var Equation = algebra.Equation;
var coords = {
l:[],
g:[]
}
//b^2 - 2bx + x^2 - 2bm^2x + b^2m^2 - r^2
var sl = algebra.parse(Math.pow(b,2)+" - "+2*b+"x + x^2 + "+Math.pow(m,2)+"x^2 -" + 2 * b * Math.pow(m,2) + "* x + " + Math.pow(b,2) * Math.pow(m,2) + " - " + Math.pow(r,2));
var sr = algebra.parse("0")
var eq = new Equation(sl, sr);
//Solves for x rounded to the nearest 1000
coords.l.push(Math.trunc((eq.solveFor("x")[0]*1000))/1000);
coords.g.push(Math.trunc((eq.solveFor("x")[1]*1000))/1000);
//Solves for y
coords.l.push(Math.trunc((coords.l[0] * m + a - (b * m))*1000)/1000);
coords.g.push(Math.trunc((coords.g[0] * m + a - (b * m))*1000)/1000);
return JSON.stringify(coords);
}
var findSlope = function(x1,y1,x2,y2){
//Finds Slope rounded to the nearest 1000th
return Math.trunc(((y1-y2)/(x1-x2))*1000)/1000;
}
var getRandomInt = function(min, max) {
min = Math.ceil(min);
max = Math.floor(max);
return Math.floor(Math.random() * (max - min)) + min;
}
var wolves = [];
var deers = [];
var deer = function(x,y){
this.x = x;
this.y = y;
this.hp = 100;
this.size = 10;
this.hunger = 0*%;
this.preyTypes = [grass];
this.predatorTypes = [wolves];
deers.push(this);
}
var wolf = function(x,y){
this.x = x;
this.y = y;
this.hp = 100;
this.size = 10;
this.hunger = 0 * %;
wolves.push(this);
this.preyTypes = [deers]
}
wolf.prototype.move = function(){
this.nearbyPredators = [];
this.nearbyPrey = [];
//finds all nearby prey
for(var j = 0;j<this.preyTypes.length;j++){
for(var i = 0;i < this.preyTypes[j].length;i++){
if(findDis(this.preyTypes[j][i].x,this.preyTypes[j][i].y,this.x,this.y) < 40){
this.nearbyPrey.push(this.preyTypes[j][i]);
}else{
console.log(findDis(this.preyTypes[j][i].x,this.preyTypes[j][i].y,this.x,this.y))
}
}
}
//If there are no nearby prey, move randomly
if(this.nearbyPrey.length === 0){
wolf.x += getRandomInt(-8,9)
wolf.y -= getRandomInt(-9,8);
//If there is only one nearby prey, move towards it
}else if(this.nearbyPrey.length === 1){
this.nearestPrey = this.nearbyPrey[0]
var slope = findSlope(this.nearestPrey.x,this.nearestPrey.y,this.x,this.y);
console.log(slope);
var coords = JSON.parse(findIntersections(this.x,this.y,slope,1));
console.log(coords);
var ldis = findDis(this.x,this.y,coords.l[0],coords.l[1]);
var gdis = findDis(this.x,this.y,coords.g[0],coords.g[1]);
console.log(ldis,gdis)
if(ldis > gdis){
this.x = coords.l[0]
this.y = coords.l[1]
console.log(this.x,this.y)
}else {
this.x = coords.g[0]
this.y = coords.g[1]
console.log(this.x,this.y)
}
//If there is more than 1, find the nearest prey and move towards it
}else {
for(var i = 0; i < this.nearbyPrey.length; i++){
this.tempDis = getDis(this.x,this.y,this.nearbyPrey[i].x,this.nearbyPrey[i].y)
if(typeof this.nearestPrey == 'undefined'){
this.nearestPrey = {
prey:this.nearbyPrey[i],
distance:this.tempDis
}
this.tempDis = undefined
}else {
if(this.tempDis > this.nearestPrey.distance){
this.nearestPrey = {
prey:this.nearbyPrey[i],
distance:this.tempDis
}
}
}
}
var slope = findSlope(this.nearestPrey.x,this.nearestPrey.y,this.x,this.y)
var coords = JSON.parse(findIntersections(this.nearestPrey.x,this.nearestPrey.y,slope,1));
var ldis = findDis(this.nearestPrey.x,this.nearestPrey.y,coords.l[0],coords.l[1]);
var gdis = findDis(this.nearestPrey.x,this.nearestPrey.y,coords.g[0],coords.g[1]);
if(ldis > gdis){
this.x = coords.l[0]
this.y = coords.l[1]
}else {
this.x = coords.g[0]
this.y = coords.g[1]
}
}
}
wolf.prototype.bite = function(prey){
prey.hp -= this.strength;
this.hunger += 40 * %
console.log(this.hunger);
console.log(this.nearestPrey.hp)
}
new wolf(100,100)
new deer(80,80);
var init = function(){
ctx.translate(0.5, 0.5);
ctx.lineWidth = .5
window.setInterval(draw,1000);
}
var draw = function(){
ctx.clearRect(0,0,canvas.width,canvas.height)
wolves[0].move();
for(var i=0;i<wolves.length;i++){
ctx.beginPath();
ctx.arc(deers[0].x,deers[0].y,10,0,2*Math.PI);
ctx.stroke();
ctx.beginPath()
ctx.arc(wolves[i].x,wolves[i].y,10,0,2*Math.PI);
ctx.stroke();
}
}
init()
</script>