一个Javascript和画布“；“发动机”；，这需要碰撞检测
所以，我有一个小的“移动和填充”引擎，这是目前非常灵长的一个Javascript和画布“；“发动机”；，这需要碰撞检测,javascript,html,canvas,collision-detection,Javascript,Html,Canvas,Collision Detection,所以，我有一个小的“移动和填充”引擎，这是目前非常灵长的 var canvas, ctx; var pixX = 0; //positions var pixY = 0; var endX = 0; var endY = 0; var youX = 5; //sizes var youY = 5; var dis = 1; //timings var p = 0
var canvas, ctx;
var pixX = 0; //positions
var pixY = 0;
var endX = 0;
var endY = 0;
var youX = 5; //sizes
var youY = 5;
var dis = 1; //timings
var p = 0;
var pixel = new Array();
window.onload = function() {
init();
}
function init() {
canvas = document.getElementById('main');
ctx = canvas.getContext('2d');
setInterval(loop,40);
var pixTimer = Math.floor((Math.random() * 1000) * 10) + 1;
setInterval(addPixel, pixTimer);
document.addEventListener('keydown',function(e) {
runMove(e);
});
}
function addPixel() {
pX = Math.floor(Math.random() * 800) + 1;
pY = Math.floor(Math.random() * 600) + 1;
p++;
}
function loop() {
ctx.clearRect(0,0,canvas.width,canvas.height);
var bgImg = new Image();
bgImg.src = 'bg.png';
ctx.drawImage(bgImg,0,0,800,600);
ctx.fillRect(pixX,pixY,youX,youY);
ctx.fillText(pixX + ':' + pixY, 5, 500);
if (p > 0) {
for (var a = 0; a <= p; a++) {
pixel[a] = ctx.fillRect(pX,pY,5,5);
}
}
}
function checkIntersections() {
for (var x = 0; x < pixel.length; x++) {
if (pixX == pixel[x].x) { alert(0) }
}
}
function runMove(e) {
var canvas = document.getElementById('main');
ky = e.keyCode;
switch(ky) {
case 37:
endX = endX - dis;
if (pixX == endX) {
} else {
if (pixX >= 0 && pixX < canvas.width) {
moveleft = setInterval(ml,10);
function ml() { pixX--; }
} else {
pixX = 0;
}
}
return false;
case 38:
endY = endY - dis;
if (pixY == endY) {
} else {
if (pixY >= 0 && pixY < canvas.height) {
moveup = setInterval(mu,10);
function mu() { pixY--; }
}
}
checkIntersections();
return false;
case 39:
endX = endX + dis;
if (pixX == endX) {
} else {
if (pixX >= 0 && pixX < canvas.width) {
moveright = setInterval(mr,10);
function mr() { pixX++; }
}
}
checkIntersections();
return false;
case 40:
endY = endY + dis;
if (pixY == endY) {
} else {
if (pixY >= 0 && pixY < canvas.height) {
movedown = setInterval(md,10);
function md() { pixY++; }
}
}
checkIntersections();
return false;
case 80:
growing = setInterval(grow,100);
clearInterval(shrinking);
function grow() {
youX = youX + dis;
youY = youY + dis;
}
checkIntersections();
return false;
case 73:
clearInterval(shrinking);
clearInterval(growing);
return false;
case 79:
shrinking = setInterval(shrink,100);
clearInterval(growing);
function shrink() {
youX = youX - dis;
youY = youY - dis;
}
return false;
default:
return false;
}
}
var canvas, ctx;
var pixX = 0; //positions
var pixY = 0;
var endX = 0;
var endY = 0;
var youX = 5; //sizes
var youY = 5;
var dis = 1; //timings
var p = 0;
var pixel = new Array();
window.onload = function() {
init();
}
function init() {
canvas = document.getElementById('main');
ctx = canvas.getContext('2d');
setInterval(loop,40);
var pixTimer = Math.floor((Math.random() * 1000) * 10) + 1;
setInterval(addPixel, pixTimer);
document.addEventListener('keydown',function(e) {
runMove(e);
});
}
function addPixel() {
pX = Math.floor(Math.random() * 800) + 1;
pY = Math.floor(Math.random() * 600) + 1;
p++;
}
function loop() {
ctx.clearRect(0,0,canvas.width,canvas.height);
var bgImg = new Image();
bgImg.src = 'bg.png';
ctx.drawImage(bgImg,0,0,800,600);
ctx.fillRect(pixX,pixY,youX,youY);
ctx.fillText(pixX + ':' + pixY, 5, 500);
if (p > 0) {
for (var a = 0; a <= p; a++) {
pixel[a] = ctx.fillRect(pX,pY,5,5);
}
}
}
function checkIntersections() {
for (var x = 0; x < pixel.length; x++) {
if (pixX == pixel[x].x) { alert(0) }
}
}
function runMove(e) {
var canvas = document.getElementById('main');
ky = e.keyCode;
switch(ky) {
case 37:
endX = endX - dis;
if (pixX == endX) {
} else {
if (pixX >= 0 && pixX < canvas.width) {
moveleft = setInterval(ml,10);
function ml() { pixX--; }
} else {
pixX = 0;
}
}
return false;
case 38:
endY = endY - dis;
if (pixY == endY) {
} else {
if (pixY >= 0 && pixY < canvas.height) {
moveup = setInterval(mu,10);
function mu() { pixY--; }
}
}
checkIntersections();
return false;
case 39:
endX = endX + dis;
if (pixX == endX) {
} else {
if (pixX >= 0 && pixX < canvas.width) {
moveright = setInterval(mr,10);
function mr() { pixX++; }
}
}
checkIntersections();
return false;
case 40:
endY = endY + dis;
if (pixY == endY) {
} else {
if (pixY >= 0 && pixY < canvas.height) {
movedown = setInterval(md,10);
function md() { pixY++; }
}
}
checkIntersections();
return false;
case 80:
growing = setInterval(grow,100);
clearInterval(shrinking);
function grow() {
youX = youX + dis;
youY = youY + dis;
}
checkIntersections();
return false;
case 73:
clearInterval(shrinking);
clearInterval(growing);
return false;
case 79:
shrinking = setInterval(shrink,100);
clearInterval(growing);
function shrink() {
youX = youX - dis;
youY = youY - dis;
}
return false;
default:
return false;
}
}
var canvas, ctx;
var pixX = 0; //positions
var pixY = 0;
var endX = 0;
var endY = 0;
var youX = 5; //sizes
var youY = 5;
var dis = 1; //timings
var p = 0;
var pixel = new Array();
window.onload = function() {
init();
}
function init() {
canvas = document.getElementById('main');
ctx = canvas.getContext('2d');
setInterval(loop,40);
var pixTimer = Math.floor((Math.random() * 1000) * 10) + 1;
setInterval(addPixel, pixTimer);
document.addEventListener('keydown',function(e) {
runMove(e);
});
}
function addPixel() {
pX = Math.floor(Math.random() * 800) + 1;
pY = Math.floor(Math.random() * 600) + 1;
p++;
}
function loop() {
ctx.clearRect(0,0,canvas.width,canvas.height);
var bgImg = new Image();
bgImg.src = 'bg.png';
ctx.drawImage(bgImg,0,0,800,600);
ctx.fillRect(pixX,pixY,youX,youY);
ctx.fillText(pixX + ':' + pixY, 5, 500);
if (p > 0) {
for (var a = 0; a <= p; a++) {
pixel[a] = ctx.fillRect(pX,pY,5,5);
}
}
}
function checkIntersections() {
for (var x = 0; x < pixel.length; x++) {
if (pixX == pixel[x].x) { alert(0) }
}
}
function runMove(e) {
var canvas = document.getElementById('main');
ky = e.keyCode;
switch(ky) {
case 37:
endX = endX - dis;
if (pixX == endX) {
} else {
if (pixX >= 0 && pixX < canvas.width) {
moveleft = setInterval(ml,10);
function ml() { pixX--; }
} else {
pixX = 0;
}
}
return false;
case 38:
endY = endY - dis;
if (pixY == endY) {
} else {
if (pixY >= 0 && pixY < canvas.height) {
moveup = setInterval(mu,10);
function mu() { pixY--; }
}
}
checkIntersections();
return false;
case 39:
endX = endX + dis;
if (pixX == endX) {
} else {
if (pixX >= 0 && pixX < canvas.width) {
moveright = setInterval(mr,10);
function mr() { pixX++; }
}
}
checkIntersections();
return false;
case 40:
endY = endY + dis;
if (pixY == endY) {
} else {
if (pixY >= 0 && pixY < canvas.height) {
movedown = setInterval(md,10);
function md() { pixY++; }
}
}
checkIntersections();
return false;
case 80:
growing = setInterval(grow,100);
clearInterval(shrinking);
function grow() {
youX = youX + dis;
youY = youY + dis;
}
checkIntersections();
return false;
case 73:
clearInterval(shrinking);
clearInterval(growing);
return false;
case 79:
shrinking = setInterval(shrink,100);
clearInterval(growing);
function shrink() {
youX = youX - dis;
youY = youY - dis;
}
return false;
default:
return false;
}
}
var canvas, ctx;
var pixX = 0; //positions
var pixY = 0;
var endX = 0;
var endY = 0;
var youX = 5; //sizes
var youY = 5;
var dis = 1; //timings
var p = 0;
window.onload = function() {
init();
}
function init() {
canvas = document.getElementById('main');
ctx = canvas.getContext('2d');
setInterval(loop,40);
var pixTimer = Math.floor((Math.random() * 1000) * 10) + 1;
setInterval(addPixel, pixTimer);
document.addEventListener('keydown',function(e) {
runMove(e);
});
}
function addPixel() {
pX = Math.floor(Math.random() * 800) + 1;
pY = Math.floor(Math.random() * 600) + 1;
p++;
}
function loop() {
ctx.clearRect(0,0,canvas.width,canvas.height);
ctx.fillRect(pixX,pixY,youX,youY);
ctx.fillText(pixX + ':' + pixY, 5, 500);
if (p > 0) {
for (var a = 0; a <= p; a++) {
ctx.fillRect(pX,pY,5,5);
}
}
}
function runMove(e) {
var canvas = document.getElementById('main');
ky = e.keyCode;
switch(ky) {
case 37:
endX = endX - dis;
if (pixX == endX) {
} else {
if (pixX >= 0 && pixX < canvas.width) {
moveleft = setInterval(ml,10);
function ml() { pixX--; }
} else {
pixX = 0;
}
}
return false;
case 38:
endY = endY - dis;
if (pixY == endY) {
} else {
if (pixY >= 0 && pixY < canvas.height) {
moveup = setInterval(mu,10);
function mu() { pixY--; }
}
}
return false;
case 39:
endX = endX + dis;
if (pixX == endX) {
} else {
if (pixX >= 0 && pixX < canvas.width) {
moveright = setInterval(mr,10);
function mr() { pixX++; }
}
}
return false;
case 40:
endY = endY + dis;
if (pixY == endY) {
} else {
if (pixY >= 0 && pixY < canvas.height) {
movedown = setInterval(md,10);
function md() { pixY++; }
}
}
return false;
case 80:
growing = setInterval(grow,100);
clearInterval(shrinking);
function grow() {
youX = youX + dis;
youY = youY + dis;
}
return false;
case 73:
clearInterval(shrinking);
clearInterval(growing);
return false;
case 79:
shrinking = setInterval(shrink,100);
clearInterval(growing);
function shrink() {
youX = youX - dis;
youY = youY - dis;
}
return false;
default:
return false;
}
}
var canvas, ctx;
var pixX = 0; //positions
var pixY = 0;
var endX = 0;
var endY = 0;
var youX = 5; //sizes
var youY = 5;
var dis = 1; //timings
var p = 0;
var pixel = new Array();
window.onload = function() {
init();
}
function init() {
canvas = document.getElementById('main');
ctx = canvas.getContext('2d');
setInterval(loop,40);
var pixTimer = Math.floor((Math.random() * 1000) * 10) + 1;
setInterval(addPixel, pixTimer);
document.addEventListener('keydown',function(e) {
runMove(e);
});
}
function addPixel() {
pX = Math.floor(Math.random() * 800) + 1;
pY = Math.floor(Math.random() * 600) + 1;
p++;
}
function loop() {
ctx.clearRect(0,0,canvas.width,canvas.height);
var bgImg = new Image();
bgImg.src = 'bg.png';
ctx.drawImage(bgImg,0,0,800,600);
ctx.fillRect(pixX,pixY,youX,youY);
ctx.fillText(pixX + ':' + pixY, 5, 500);
if (p > 0) {
for (var a = 0; a <= p; a++) {
pixel[a] = ctx.fillRect(pX,pY,5,5);
}
}
}
function checkIntersections() {
for (var x = 0; x < pixel.length; x++) {
if (pixX == pixel[x].x) { alert(0) }
}
}
function runMove(e) {
var canvas = document.getElementById('main');
ky = e.keyCode;
switch(ky) {
case 37:
endX = endX - dis;
if (pixX == endX) {
} else {
if (pixX >= 0 && pixX < canvas.width) {
moveleft = setInterval(ml,10);
function ml() { pixX--; }
} else {
pixX = 0;
}
}
return false;
case 38:
endY = endY - dis;
if (pixY == endY) {
} else {
if (pixY >= 0 && pixY < canvas.height) {
moveup = setInterval(mu,10);
function mu() { pixY--; }
}
}
checkIntersections();
return false;
case 39:
endX = endX + dis;
if (pixX == endX) {
} else {
if (pixX >= 0 && pixX < canvas.width) {
moveright = setInterval(mr,10);
function mr() { pixX++; }
}
}
checkIntersections();
return false;
case 40:
endY = endY + dis;
if (pixY == endY) {
} else {
if (pixY >= 0 && pixY < canvas.height) {
movedown = setInterval(md,10);
function md() { pixY++; }
}
}
checkIntersections();
return false;
case 80:
growing = setInterval(grow,100);
clearInterval(shrinking);
function grow() {
youX = youX + dis;
youY = youY + dis;
}
checkIntersections();
return false;
case 73:
clearInterval(shrinking);
clearInterval(growing);
return false;
case 79:
shrinking = setInterval(shrink,100);
clearInterval(growing);
function shrink() {
youX = youX - dis;
youY = youY - dis;
}
return false;
default:
return false;
}
}
var画布，ctx；
var-pixX=0//位置
var-pixY=0；
var-endX=0；
var-endY=0；
var-youX=5//尺寸
var=5；
var-dis=1//时间安排
var p=0；
window.onload=函数（）{
init（）；
}
函数init（）{
canvas=document.getElementById（'main'）；
ctx=canvas.getContext（'2d'）；
设置间隔（循环，40）；
var-pixTimer=Math.floor（（Math.random（）*1000）*10）+1；
设置间隔（addPixel、pixTimer）；
文档.添加的事件列表器（'keydown'，函数（e）{
runMove（e）；
});
}
函数addPixel（）{
pX=Math.floor（Math.random（）*800）+1；
pY=Math.floor（Math.random（）*600）+1；
p++；
}
函数循环（）{
clearRect（0,0，canvas.width，canvas.height）；
ctx.fillRect（pixX，pixY，youX，youY）；
ctx.fillText（pixX+'：'+pixY，5500）；
如果（p>0）{
对于（var a=0；a=0&&pixX=0&&pixY=0&&pixX=0&&pixY var canvas, ctx;
var pixX = 0; //positions
var pixY = 0;
var endX = 0;
var endY = 0;
var youX = 5; //sizes
var youY = 5;
var dis = 1; //timings
var p = 0;
var pixel = new Array();
window.onload = function() {
init();
}
function init() {
canvas = document.getElementById('main');
ctx = canvas.getContext('2d');
setInterval(loop,40);
var pixTimer = Math.floor((Math.random() * 1000) * 10) + 1;
setInterval(addPixel, pixTimer);
document.addEventListener('keydown',function(e) {
runMove(e);
});
}
function addPixel() {
pX = Math.floor(Math.random() * 800) + 1;
pY = Math.floor(Math.random() * 600) + 1;
p++;
}
function loop() {
ctx.clearRect(0,0,canvas.width,canvas.height);
var bgImg = new Image();
bgImg.src = 'bg.png';
ctx.drawImage(bgImg,0,0,800,600);
ctx.fillRect(pixX,pixY,youX,youY);
ctx.fillText(pixX + ':' + pixY, 5, 500);
if (p > 0) {
for (var a = 0; a <= p; a++) {
pixel[a] = ctx.fillRect(pX,pY,5,5);
}
}
}
function checkIntersections() {
for (var x = 0; x < pixel.length; x++) {
if (pixX == pixel[x].x) { alert(0) }
}
}
function runMove(e) {
var canvas = document.getElementById('main');
ky = e.keyCode;
switch(ky) {
case 37:
endX = endX - dis;
if (pixX == endX) {
} else {
if (pixX >= 0 && pixX < canvas.width) {
moveleft = setInterval(ml,10);
function ml() { pixX--; }
} else {
pixX = 0;
}
}
return false;
case 38:
endY = endY - dis;
if (pixY == endY) {
} else {
if (pixY >= 0 && pixY < canvas.height) {
moveup = setInterval(mu,10);
function mu() { pixY--; }
}
}
checkIntersections();
return false;
case 39:
endX = endX + dis;
if (pixX == endX) {
} else {
if (pixX >= 0 && pixX < canvas.width) {
moveright = setInterval(mr,10);
function mr() { pixX++; }
}
}
checkIntersections();
return false;
case 40:
endY = endY + dis;
if (pixY == endY) {
} else {
if (pixY >= 0 && pixY < canvas.height) {
movedown = setInterval(md,10);
function md() { pixY++; }
}
}
checkIntersections();
return false;
case 80:
growing = setInterval(grow,100);
clearInterval(shrinking);
function grow() {
youX = youX + dis;
youY = youY + dis;
}
checkIntersections();
return false;
case 73:
clearInterval(shrinking);
clearInterval(growing);
return false;
case 79:
shrinking = setInterval(shrink,100);
clearInterval(growing);
function shrink() {
youX = youX - dis;
youY = youY - dis;
}
return false;
default:
return false;
}
}
var canvas, ctx;
var pixX = 0; //positions
var pixY = 0;
var endX = 0;
var endY = 0;
var youX = 5; //sizes
var youY = 5;
var dis = 1; //timings
var p = 0;
var pixel = new Array();
window.onload = function() {
init();
}
function init() {
canvas = document.getElementById('main');
ctx = canvas.getContext('2d');
setInterval(loop,40);
var pixTimer = Math.floor((Math.random() * 1000) * 10) + 1;
setInterval(addPixel, pixTimer);
document.addEventListener('keydown',function(e) {
runMove(e);
});
}
function addPixel() {
pX = Math.floor(Math.random() * 800) + 1;
pY = Math.floor(Math.random() * 600) + 1;
p++;
}
function loop() {
ctx.clearRect(0,0,canvas.width,canvas.height);
var bgImg = new Image();
bgImg.src = 'bg.png';
ctx.drawImage(bgImg,0,0,800,600);
ctx.fillRect(pixX,pixY,youX,youY);
ctx.fillText(pixX + ':' + pixY, 5, 500);
if (p > 0) {
for (var a = 0; a <= p; a++) {
pixel[a] = ctx.fillRect(pX,pY,5,5);
}
}
}
function checkIntersections() {
for (var x = 0; x < pixel.length; x++) {
if (pixX == pixel[x].x) { alert(0) }
}
}
function runMove(e) {
var canvas = document.getElementById('main');
ky = e.keyCode;
switch(ky) {
case 37:
endX = endX - dis;
if (pixX == endX) {
} else {
if (pixX >= 0 && pixX < canvas.width) {
moveleft = setInterval(ml,10);
function ml() { pixX--; }
} else {
pixX = 0;
}
}
return false;
case 38:
endY = endY - dis;
if (pixY == endY) {
} else {
if (pixY >= 0 && pixY < canvas.height) {
moveup = setInterval(mu,10);
function mu() { pixY--; }
}
}
checkIntersections();
return false;
case 39:
endX = endX + dis;
if (pixX == endX) {
} else {
if (pixX >= 0 && pixX < canvas.width) {
moveright = setInterval(mr,10);
function mr() { pixX++; }
}
}
checkIntersections();
return false;
case 40:
endY = endY + dis;
if (pixY == endY) {
} else {
if (pixY >= 0 && pixY < canvas.height) {
movedown = setInterval(md,10);
function md() { pixY++; }
}
}
checkIntersections();
return false;
case 80:
growing = setInterval(grow,100);
clearInterval(shrinking);
function grow() {
youX = youX + dis;
youY = youY + dis;
}
checkIntersections();
return false;
case 73:
clearInterval(shrinking);
clearInterval(growing);
return false;
case 79:
shrinking = setInterval(shrink,100);
clearInterval(growing);
function shrink() {
youX = youX - dis;
youY = youY - dis;
}
return false;
default:
return false;
}
}
var画布，ctx；
var pixX=0；//位置
var-pixY=0；
var-endX=0；
var-endY=0；
var youX=5；//大小
var=5；
var dis=1；//计时
var p=0；
var pixel=新数组（）；
window.onload=函数（）{
init（）；
}
函数init（）{
canvas=document.getElementById（'main'）；
ctx=canvas.getContext（'2d'）；
设置间隔（循环，40）；
var-pixTimer=Math.floor（（Math.random（）*1000）*10）+1；
设置间隔（addPixel、pixTimer）；
文档.添加的事件列表器（'keydown'，函数（e）{
runMove（e）；
});
}
函数addPixel（）{
pX=Math.floor（Math.random（）*800）+1；
pY=Math.floor（Math.random（）*600）+1；
p++；
}
函数循环（）{
clearRect（0,0，canvas.width，canvas.height）；
var bgImg=新图像（）；
bgimgsrc='bg.png'；
ctx.drawImage（bgImg，0,0800600）；
ctx.fillRect（pixX，pixY，youX，youY）；
ctx.fillText（pixX+'：'+pixY，5500）；
如果（p>0）{
对于（var a=0；a=0&&pixX=0&&pixY=0&&pixX=0&&pixY