JavaScript如何编写网页小游戏
这篇文章主要介绍JavaScript如何编写网页小游戏，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！
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以下为游戏界面：
以下为游戏代码：
var timerID = null;
var INT = 40;
var loadFLG = 0;
var gameFLG = 0;
var missFLG = 0;
var tim = 0;
var blcol = new Array(5); // block color
var blsta = new Array(40); // block status
var blNO = new Array(40); // block No
var blclr = 0; // clear block
var ballX = 0; // ball data
var ballY = 0;
var ballN = 5;
var ballDX = 0;
var ballDY = 0;
var tmpRL = 193;
var X = 0;
blcol[0] = "blue";
blcol[1] = "yello";
blcol[2] = "red";
blcol[3] = "purple";
blcol[4] = "#FF0000";
blcol[5] = "black";
function mainF() {
clearTimeout(timerID);
tim = tim + 1;
with (Math) {
tmptim = floor(tim / 10)};
document.forms[0].TM.value = tmptim;
ballX = ballX + ballDX;
ballY = ballY + ballDY;
outCHK();
blkCHK();
ball.style.posTop = ballY;
ball.style.posLeft = ballX;
racket.style.posLeft = tmpRL;
if (gameFLG == 01) {
timerID = setTimeout("mainF()", INT);
}
}
function initG() {
if (blclr >= 40) {
blclr = 0;
tim = 0;
ballN = 3;
with (Math) {
tmptim = floor(tim / 10);
}
document.forms[0].TM.value = tmptim;
clrmes.style.posTop = -1000;
clrmes.style.posLeft = -1000;
ovrmes.style.posTop = -1000;
ovrmes.style.posLeft = -1000;
for (ib = 0; ib < 5; ib++) {
for (ia = 0; ia < 8; ia++) {
chc(ib * 8 + ia +1, ib);
blsta[ib * 8 + ia] = ib;
}
}
}
document.forms[0].BL.value = ballN;
starter.style.posTop = -1000;
starter.style.posLeft = -1000;
gameFLG = 1;
loadFLG = 1;
ballX = 209;
ballY = 270;
ballDX =- 8;
ballDY =- 8;
tmpRL = 193;
missFLG = 0;
timerID = setTimeout("mainF()", INT);
}
function SUP() {
UP.outerHTML = "SPEED DOWN
";
DN.style.posTop = 170;
DN.style.posLeft = 432;
INT = 40;
}
function SDN() {
DN.outerHTML = "
SPEED UP ";
UP.style.posTop = 170;
UP.style.posLeft = 432;
INT = 50;
}
function MouseMv() {
if (loadFLG == 1) {
tmpRL = X - 20;
if (tmpRL < 16) { tmpRL = 16; }
if (tmpRL > 370) { tmpRL = 370; }
}
}
function outCHK() {
if (ballX < 16){ ballX = 32 - ballX; ballDX = -ballDX; }
if (ballX > 401){ ballX = 802 - ballX; ballDX = -ballDX; }
if (ballY < 16){ ballY = 32 - ballY; ballDY = -ballDY; }
if (ballY >= 272) {
if (missFLG == 0) {
tmpX = (ballDX / ballDY) * (272 - ballY) + ballX;
if (tmpX >= tmpRL - 12) {
if (tmpX <= tmpRL + 42) {
ballY = 272; ballDY = -ballDY;
ballX = tmpX;
ballRD = tmpX - tmpRL;
with (Math){ ballDX = 8 * abs(ballDX) / ballDX; }
if (ballRD < -4){ ballDX = -15; }
if (ballRD > 36){ ballDX = 15; }
if (ballRD >= 14){ if (ballRD <= 16) { ballDX = -2; } }
if (ballRD >= 17){ if (ballRD <= 20) { ballDX = 2; } }
if (ballRD >= 0){ if (ballRD <= 4) { ballDX = -4; } }
if (ballRD >= 28){ if (ballRD <= 32) { ballDX = 4; } }
if (ballRD >= -4){ if (ballRD <= -1) { ballDX = -11; } }
if (ballRD >= 33){ if (ballRD <= 36) { ballDX = 11; } }
}
}
if (ballDY > 0){ missFLG = 1; }
}
else {
if (ballY > 290){ missFLG = 0; ballN = ballN - 1; gameEnd(); }
}
}
}
function blkCHK() {
tmpY = ballY + 4;
tmpX = ballX + 4;
if (tmpY >= 48) {
if (tmpY <= 147) {
if (tmpX >= 29) {
if (tmpX <= 396) {
with (Math) {
ia = floor((tmpX - 29) / 46);
ib = floor((tmpY - 48) / 20);
ic = ib * 8 + ia;
}
if (blsta[ic] <= 4) {
tmpbc = blsta[ic] + 1;
blsta[ic] = tmpbc;
chc(ic + 1, tmpbc);
if (tmpbc == 5){ blclr = blclr + 1; }
if (blclr >= 40){ gameEnd(); }
if (ballDX > 0) {
iy=(ballDY / ballDX) * (29 + 46 * ia - tmpX) + tmpY;
if (iy > 48 + 20 * ib + 18) {
tmpY1 = 48 + 20 * ib + 18;
tmpX1 = (ballDX / ballDY) * (48 + 20 * ib + 18 - tmpY) + tmpX;
ballX = tmpX1 - 4;
ballY = tmpY1 - 4;
ballDY = -ballDY;
}
else {
if (iy < 44 + 20 * ib) {
tmpY1 = 48 + 20 * ib;
tmpX1 = (ballDX / ballDY) * (48 + 20 * ib - tmpY) + tmpX;
ballX = tmpX1 - 4;
ballY = tmpY1 - 4;
ballDY = -ballDY;
}
else {
tmpX1 = 29 + 46 * ia;
tmpY1 = (ballDY / ballDX) * (29 + 46 * ia - tmpX) + tmpY;
ballX = tmpX1 - 4;
ballY = tmpY1 - 4;
ballDX = -ballDX;
}
}
}
else {
iy = (ballDY / ballDX) * (29+46 * ia + 44 - tmpX) + tmpY;
if (iy > 48 + 20 * ib + 18) {
tmpY1 = 48 + 20 * ib + 18;
tmpX1 = (ballDX / ballDY) * (48 + 20 * ib + 18 - tmpY) + tmpX;
ballX = tmpX1 - 4;
ballY = tmpY1 - 4;
ballDY = -ballDY;
}
else {
if (iy < 44 + 20 * ib) {
tmpY1 = 48 + 20 * ib;
tmpX1 = (ballDX / ballDY) * (48 + 20 * ib - tmpY) + tmpX;
ballX = tmpX1 - 4;
ballY = tmpY1 - 4;
ballDY = -ballDY;
}
else {
tmpX1 = 29+46 * ia + 44;
tmpY1 = (ballDY / ballDX) * (29 + 46 * ia + 44 - tmpX) + tmpY;
ballX = tmpX1 - 4;
ballY = tmpY1 - 4;
ballDX = -ballDX;
}
}
}
}
}
}
}
}
}
function gameEnd() {
document.forms[0].BL.value = ballN;
gameFLG = 0;
loadFLG = 0;
starter.style.posTop = 200;
starter.style.posLeft = 180;
if (blclr >= 40) {
clrmes.style.posTop = 150;
clrmes.style.posLeft = 160;
}
if (ballN <= 0) {
ovrmes.style.posTop = 150;
ovrmes.style.posLeft = 160;
blclr = 40;
}
}
function onLD() {
bgIE.style.posTop = 16;
bgIE.style.posLeft = 16;
ball.style.posTop = 270;
ball.style.posLeft = 209;
racket.style.posTop = 280;
racket.style.posLeft = 193;
info.style.posTop = 16;
info.style.posLeft = 432;
starter.style.posTop = -1000;
starter.style.posLeft = -1000;
clrmes.style.posTop = -1000;
clrmes.style.posLeft = -1000;
ovrmes.style.posTop = -1000;
ovrmes.style.posLeft = -1000;
DN.style.posTop = 170;
DN.style.posLeft = 432;
for (ib = 0; ib < 5; ib++) {
for (ia = 0; ia < 8; ia++) {
blsta[ib * 8 + ia] = ib;
}
}
starter.style.posTop = 200;
starter.style.posLeft = 180;
}
function chc(bno,bcl) {
tmpbno = ((bno < 10.5) ? "b0" : "b") + (bno-1);
eval(tmpbno).bgColor = blcol[bcl];
}
// End -->
PONG
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