<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>俄罗斯方块</title>
<style type="text/css">
#tetris {
border: 6px solid grey;
}
</style>
</head>
<body>
<canvas id="tetris" width="565" height="576"></canvas>
<script type="text/javascript">
var canvas = document.getElementById("tetris");
var context = canvas.getContext("2d");
var padding = 6,
size = 32,
minX = 0,
maxX = 10,
minY = 0,
maxY = 18,
score = 0,
level = 1;
var gameMap = new Array();
var gameTimer;
initGameMap();
drawGrid();
var arrays = basicBlockType();
var blockIndex = getRandomIndex();
var block = getPointByCode(blockIndex);
context.fillStyle = getBlockColorByIndex(blockIndex);
drawBlock(block);
function initGameMap() {
for (var i = 0; i < maxY; i++) {
var row = new Array();
for (var j = 0; j < maxX; j++) {
row[j] = false;
}
gameMap[i] = row;
}
}
function round() {
if (blockIndex == 4) {
return;
}
for (var i = 1; i < block.length; i++) {
var o = block[0];
var point = block[i];
var tempX = o.y + o.x - point.y;
var tempY = o.y - o.x + point.x;
if (isOverZone(tempX, tempY)) {
return; //不可旋转
}
}
clearBlock();
for (var i = 1; i < block.length; i++) {
var o = block[0];
var point = block[i];
var tempX = o.y + o.x - point.y;
var tempY = o.y - o.x + point.x;
block[i] = {
x: tempX,
y: tempY
};
}
drawBlock();
}
function moveDown() {
var overFlag = canOver();
if(overFlag){
window.clearInterval(gameTimer);
add2GameMap();
redrawGameMap();
return;//游戏结束
}
var flag = moveTo(0, 1);
if (flag) {
return;
}
add2GameMap();
clearLines();
redrawGameMap();
nextBlock();
}
function clearLines() {
var clearRowList = new Array();
for (var i = 0; i < maxY; i++) {
var flag = true;
for (var j = 0; j < maxX; j++) {
if (gameMap[i][j] == false) {
flag = false;
break;
}
}
if (flag) {
clearRowList.push(i); //记录消除行号的索引
}
}
var clearRows = clearRowList.length;
for (var x = 0; x < clearRows; x++) {
var index = clearRowList[x];
for (var i = index; i > 0; i--) {
for (var j = 0; j < maxX; j++) {
gameMap[i][j] = gameMap[i - 1][j];
}
}
}
if (clearRows > 0) {
for (var i = 0; i < maxY; i++) {
for (var j = 0; j < maxX; j++) {
if (gameMap[i][j] == false) {
clearBlockByPoint(i, j);
}
}
}
}
}
function redrawGameMap() {
drawGrid();
for (var i = 0; i < maxY; i++) {
for (var j = 0; j < maxX; j++) {
if (gameMap[i][j]) {
roadBlock(j, i);
}
}
}
}
function drawShadowBlock() {
var currentBlock = block;
var shadowPoints = getCanMoveDown();
if (shadowPoints != null && shadowPoints.length > 0) {
for (var i = 0; i < shadowPoints.length; i++) {
var point = shadowPoints[i];
if (point == null) {
continue;
}
var start = point.x * size;
var end = point.y * size;
context.fillStyle = "#abcdef";
context.fillRect(start, end, size, size);
context.strokeStyle = "black";
context.strokeRect(start, end, size, size);
}
}
}
function getCanMoveDown() {
var nps = canMove(0, 1, block);
var last = null;
if (nps != null) {
last = new Array();
while ((nps = canMove(0, 1, nps)) != null) {
if (nps != null) {
last = nps;
}
}
}
return last;
}
function canOver(){
var flag = false;
for (var i = 0; i < block.length; i++) {
var point = block[i];
var x = point.x;
var y = point.y;
if(isOverZone(x , y)){
flag = true;
break;
}
}
return flag;
}
function drawLevelScore() {
}
function add2GameMap() {
for (var i = 0; i < block.length; i++) {
var point = block[i];
var x = point.x;
var y = point.y;
var gameMapRow = gameMap[y]; //获取到地图的一行
gameMapRow[x] = true; //将此行中的某个格子标记为堆积物
gameMap[y] = gameMapRow; //再将行给设置回来
}
}
function moveLeft() {
moveTo(-1, 0);
}
function moveRight() {
moveTo(1, 0);
}
function quickDown() {
while (moveTo(0, 1));
}
function moveTo(moveX, moveY) {
var move = canMove(moveX, moveY, block); //判定是否可以移动
if (move == null) {
return false;
}
clearBlock();
for (var i = 0; i < block.length; i++) {
var point = block[i];
point.x = point.x + moveX;
point.y = point.y + moveY;
}
drawBlock();
return true;
}
function nextBlock() {
blockIndex = getRandomIndex();
block = getPointByCode(blockIndex);
context.fillStyle = getBlockColorByIndex(blockIndex);
drawBlock();
}
document.onkeypress = function(evt) {
var key = window.event ? evt.keyCode : evt.which;
switch (key) {
case 119: //向上旋转 W
round();
break;
case 115: //向下移动 S
moveDown();
break;
case 97: //向左移动 A
moveLeft();
break;
case 100: //向右移动 D
moveRight();
break;
case 32: //空格键快速下落到底
quickDown();
break;
}
}
function canMove(moveX, moveY, currentBlock) {
var flag = true;
var newPoints = new Array();
for (var i = 0; i < currentBlock.length; i++) {
var point = currentBlock[i];
var tempX = point.x + moveX;
var tempY = point.y + moveY;
if (isOverZone(tempX, tempY)) {
flag = false;
break;
}
}
if (flag) {
for (var i = 0; i < currentBlock.length; i++) {
var point = currentBlock[i];
var tempX = point.x + moveX;
var tempY = point.y + moveY;
newPoints[i] = {
x: tempX,
y: tempY
};
}
return newPoints;
}
return null;
}
function isOverZone(x, y) {
return x < minX || x >= maxX || y < minY || y >= maxY || gameMap[y][x];
}
document.body.click();
gameTimer = window.setInterval(moveDown , 800);
function basicBlockType() {
var arrays = new Array();
arrays[0] = [{
x: 4,
y: 0
}, {
x: 3,
y: 0
}, {
x: 5,
y: 0
}, {
x: 6,
y: 0
}];
arrays[1] = [{
x: 4,
y: 0
}, {
x: 3,
y: 0
}, {
x: 5,
y: 0
}, {
x: 4,
y: 1
}];
arrays[2] = [{
x: 4,
y: 0
}, {
x: 3,
y: 0
}, {
x: 5,
y: 0
}, {
x: 3,
y: 1
}];
arrays[3] = [{
x: 4,
y: 0
}, {
x: 5,
y: 0
}, {
x: 3,
y: 1
}, {
x: 4,
y: 1
}];
arrays[4] = [{
x: 4,
y: 0
}, {
x: 5,
y: 0
}, {
x: 4,
y: 1
}, {
x: 5,
y: 1
}];
arrays[5] = [{
x: 4,
y: 0
}, {
x: 3,
y: 0
}, {
x: 5,
y: 0
}, {
x: 5,
y: 1
}];
arrays[6] = [{
x: 4,
y: 0
}, {
x: 3,
y: 0
}, {
x: 4,
y: 1
}, {
x: 5,
y: 1
}];
return arrays;
}
function basicBlockColor() {
return ["#A00000", "#A05000", "#A0A000", "#00A000", "#00A0A0", "#0000A0", "#A000A0"];
}
function getBlockColorByIndex(typeCodeIndex) {
var arrays = basicBlockColor();
return arrays[typeCodeIndex];
}
function getPointByCode(typeCodeIndex) {
var arrays = basicBlockType();
return arrays[typeCodeIndex];
}
function getRandomIndex() {
return parseInt(Math.random() * (arrays.length - 1), 10);
}
function drawBlock() {
drawGrid();
for (var i = 0; i < block.length; i++) {
var point = block[i];
var start = point.x * size;
var end = point.y * size;
context.fillStyle = getBlockColorByIndex(blockIndex);
context.fillRect(start, end, size, size);
context.strokeStyle = "black";
context.strokeRect(start, end, size, size);
}
drawShadowBlock();
}
function roadBlock(x, y) {
context.fillStyle = "darkgray";
var start = x * size;
var end = y * size;
context.fillRect(start, end, size, size);
}
function clearBlock() {
for (var i = 0; i < block.length; i++) {
var point = block[i];
var start = point.x * size;
var end = point.y * size;
context.clearRect(start, end, size, size);
}
}
function initGameMapRow() {
var array = new Array();
for (var i = 0; i < maxX; i++) {
array[i] = false;
}
return array;
}
function clearBlockByPoint(x, y) {
var start = y * size;
var end = x * size;
context.clearRect(start, end, size, size);
}
function clearAllNullPoint() {
for (var i = 0; i < maxY; i++) {
for (var j = 0; j < maxX; j++) {
if (gameMap[i][j] == false) {
clearBlockByPoint(i, j);
}
}
}
}
function drawGrid() {
clearAllNullPoint(); //清除掉当前方块下落位置造成的阴影
context.strokeStyle = "grey"; //画笔颜色
for (var i = 0; i <= maxX; i++) {
var start = i * size;
var end = start + size;
context.beginPath();
context.moveTo(start, 0);
context.lineTo(size * i, size * maxY);
context.stroke();
context.closePath();
}
//绘制水平线条
for (var i = 0; i <= maxY; i++) {
var start = i * size;
var end = start + size;
context.beginPath();
context.moveTo(0, size * i);
context.lineTo(size * maxX, size * i);
context.stroke();
context.closePath();
}
}
</script>
</body>
</html>
index.html