我正在打破砖块游戏。当球击中其中一块砖时,砖应该会消失。问题是它只会按照数组的顺序打破砖块。所以,如果你击中了第三块砖,但是第一块和第二块砖没有被打破,那么球就会反弹而且砖块不会消失。
let xPos = 20;
let yPos = 200;
let xRect = 10;
let yRect = 570;
let xVel = 5;
let yVel = 5;
let xBrick1 = [2];
let xBrick2 = [2];
let xBrick3 = [2];
let yBrick = 0;
let r, g, b, h;
let rS, gS, bS;
function setup() {
createCanvas(500, 600);
strokeWeight(5);
////////////////////////////////////////////
r = Math.round(random(255));
g = Math.round(random(255));
b = Math.round(random(255));
if (r == 0) {
rS = r;
} else {
rS = r-20;
}
if (g == 0) {
gS = g;
} else {
gS = g-20;
}
if (b == 0) {
bS = b;
} else {
bS = b-20;
}
////////////////////////////////////////////////
makeBricks();
//////////////////////////////////////////////////
console.log(r, g, b);
console.log(rS, gS, bS);
}
function draw() {
background(000);
xPos+=xVel;
yPos+=yVel;
xRect = mouseX - 100;
fill("fff");
stroke("#000");
rect(xRect, yRect, 150, 30);
fill("#009900");
stroke("#000");
circle(xPos, yPos, 20);
if (breakBrick() == true) {
yVel *= (-1);
}
//////////////////////////////////////////////////////
for (let i = 0; i < 8; i++) {
fill(r, g, b);
strokeWeight(2);
stroke(rS, gS, bS);
rect(xBrick1[i], 0, 60, 20)
xBrick1[i+1] = xBrick1[i] + 62;
}
for (let q = 0; q < 8; q++) {
fill(r, g, b);
strokeWeight(2);
stroke(rS, gS, bS);
rect(xBrick2[q], 22, 60, 20);
xBrick2[q+1] = xBrick2[q] + 62;
}
for (let s = 0; s < 8; s++) {
fill(r, g, b);
strokeWeight(2);
stroke(rS, gS, bS);
rect(xBrick3[s], 44, 60, 20);
xBrick3[s+1] = xBrick3[s] + 62;
}
/////////////////////////////////////////////////////////
if(xPos > 480 || xPos < 20) {
xVel *= (-1);
}
if(yPos < 20) {
yVel *= (-1);
}
if(hitTest(xPos, yPos, xRect, yRect) == true) {
yVel *= (-1);
}
else if(yPos > 600){
xPos = 250;
yPos = 530;
yVel *= (-1);
}
}
function hitTest(xPos, yPos, xRect, yRect) {
if (xPos +20 > xRect && xPos < xRect + 150) {
if (yPos + 20 > yRect && yPos < yRect + 30) {
return true;
}
}
return false;
}
function makeBricks() {
for (let ip = 0; ip < 8; ip++) {
fill(r, g, b);
strokeWeight(2);
stroke(rS, gS, bS);
xBrick1.push(xBrick1[ip]);
rect(xBrick1[ip], 0, 60, 20);
xBrick1[ip+1] = xBrick1[ip] + 62;
}
for (let qp = 0; qp < 8; qp++) {
fill(r, g, b);
strokeWeight(2);
stroke(rS, gS, bS);
xBrick2.push(xBrick2[qp]);
rect(xBrick2[qp], 22, 60, 20);
xBrick2[qp+1] = xBrick2[qp] + 62;
}
for (let sp = 0; sp < 8; sp++) {
fill(r, g, b);
strokeWeight(2);
stroke(rS, gS, bS);
xBrick3.push(xBrick3[sp]);
rect(xBrick3[sp], 44, 60, 20);
xBrick3[sp+1] = xBrick3[sp] + 62;
}
}
function breakBrick() {
for (let h = 0; h < 8; h++) {
if (xPos +20 > xBrick3[h] + 20 && xPos < xBrick3[h] + 60) {
if (yPos +20 > 44 && yPos < 84) {
xBrick3.splice(h, 1);
return true;
}
}
if (xPos +20 > xBrick2[h] + 20 && xPos < xBrick2[h] + 60) {
if (yPos +20 > 22 && yPos < 62) {
xBrick2.splice(h, 1);
return true;
}
}
if (xPos +20 > xBrick1[h] + 20 && xPos < xBrick1[h] + 60) {
if (yPos +20 > 0 && yPos < 40) {
xBrick1.splice(h, 1);
return true;
}
}
}
}
我查看了所有代码和注释,无法弄明白。
我该如何解决这个问题?
如果你试图调试它,你会注意到砖实际上正在被销毁,但随后会被draw
函数覆盖。当我评论出3行时,游戏似乎工作正常:
for (let i = 0; i < 8; i++) {
fill(r, g, b);
strokeWeight(2);
stroke(rS, gS, bS);
rect(xBrick1[i], 0, 60, 20)
// xBrick1[i+1] = xBrick1[i] + 62;
}
for (let q = 0; q < 8; q++) {
fill(r, g, b);
strokeWeight(2);
stroke(rS, gS, bS);
rect(xBrick2[q], 22, 60, 20);
// xBrick2[q+1] = xBrick2[q] + 62;
}
for (let s = 0; s < 8; s++) {
fill(r, g, b);
strokeWeight(2);
stroke(rS, gS, bS);
rect(xBrick3[s], 44, 60, 20);
// xBrick3[s+1] = xBrick3[s] + 62;
}
我相信你可以自己弄清楚其余的,这里的教训是:你应该避免变异。阅读here,了解为什么这是一个不好的做法。
可预测性
变异隐藏变化,产生(意外)副作用,这可能导致令人讨厌的错误。当您实施不变性时,您可以简化应用程序架构和心智模型,这样可以更轻松地推断您的应用程序。