<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>俄罗斯方块</title>
<style type="text/css">
/*整个画布*/#tetris
{
border: 6px solid grey;
}
/*游戏面板*/</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();
//游戏地图，二维数组
var gameTimer; initGameMap();
//绘制垂直线条
drawGrid();
var arrays = basicBlockType();
var blockIndex = getRandomIndex();
//随机画一个方块意思意思
var block = getPointByCode(blockIndex);
context.fillStyle = getBlockColorByIndex(blockIndex);
drawBlock(block);
/*
*
* 初始化游戏地图
*/
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;
}
}
/*
*
* 方块旋转
* 顺时针：
* A.x =O.y + O.x - B.y * A.y =O.y - O.x + B.x
*/
function round() {
//正方形的方块不响应旋转
if (blockIndex == 4) {
return;
}
//循环处理当前的方块，找新的旋转点
for (var i = 1; i < block.length; i++) {
var o = block[0];
var point = block[i];
//旋转后的位置不能与现有格子的方块冲突
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();
//可以旋转，设置新的旋转后的坐标
for (var i = 1; i < block.length; i++) {
var o = block[0];
var point = block[i];
//旋转后的位置不能与现有格子的方块冲突
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) {
//如果不能向下移动了，将当前的方块坐标载入地图
window.clearInterval(gameTimer);
add2GameMap();
//清除游戏区域内的不同颜色的格子，使用单一颜色重新绘制地图堆积物
redrawGameMap(); return; //游戏结束
}
var flag = moveTo(0, 1);
//如果可以移动，则继续移动
if (flag) {
return;
} //如果不能向下移动了，将当前的方块坐标载入地图
add2GameMap();
//进行消行动作
clearLines();
//清除游戏区域内的不同颜色的格子，使用单一颜色重新绘制地图堆积物
redrawGameMap();
//如果不能向下移动，则继续下一个方块
nextBlock();
}
/*
*
* 消行动作，返回消除的行数
*/
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;
//所谓的消行就是将待消除行的索引，下方所有的格子上移动
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++) {
//此处可以限制满足相关条件的方块进行清除操作&& j < clearRowList[clearRows - 1]
for (var j = 0; j < maxX; j++) {
if (gameMap[i][j] == false) {
clearBlockByPoint(i, j);
}
}
}
}
}
/*
*
* 重绘游戏地图
*/
function redrawGameMap() {
drawGrid();
for (var i = 0; i < maxY; i++) {
for (var j = 0; j < maxX; j++) {
if (gameMap[i][j]) {
roadBlock(j, i);
}
}
}
}
/*
*
* 打印阴影地图
*/
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);
}
}
}
/*
*
* 返回最多可移动到的坐标位置（统计总共可以下落多少步骤）
* @return最多可移动到的坐标位置
*/
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() {
}
/*
*
* 将不能移动的各种填充至地图
*/
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;
}
/*
*
* 下一个方块
*/
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;
}
}
/*
*
* 判定是否可以移动
* @parammoveX 横向移动的个数
* @parammoveY 纵向移动的个数
*/
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;
}
/*
*
* 判定是否可以移动
* @paramx 预移动后的横坐标
* @paramy 预移动后的纵坐标
*/
function isOverZone(x, y) {
return x < minX || x >= maxX || y < minY || y >= maxY || gameMap[y][x];
}
document.body.click();
gameTimer = window.setInterval(moveDown, 800);
/*
*
* 初始化方块的基础数据
*/
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];
}
/*
*
* 根据编号返回指定编号的方块
* @paramtypeCodeIndex 方块编号索引
*/
function getPointByCode(typeCodeIndex) {
var arrays = basicBlockType();
return arrays[typeCodeIndex];
}
/*
*
* 获取随即出现方块的范围值
* @paramlens 随机数的范围
*/
function getRandomIndex() {
return parseInt(Math.random() * (arrays.length - 1), 10);
}
/*
*
* 绘制方块，按格子单个绘制
*/
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();
}
/*
*
* 绘制障碍物
*/
function roadBlock(x, y) {
context.fillStyle = "darkgray";
var start = x * size;
var end = y * size;
context.fillRect(start, end, size, size);
}
/*
*
* 绘制新的方块先清除之前的方块
*/
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);
}
}
/*
*
* 初始化一个新的行
*/
function initGameMapRow() {
var array = new Array();
for (var i = 0; i < maxX; i++) {
array[i] = false;
}
return array;
}
/*
*
* 根据坐标清除指定格子的内容
* @paramx 横坐标
* @paramy 纵坐标
*/
function clearBlockByPoint(x, y) { var start = y * size; var end = x * size; context.clearRect(start, end, size, size); }
/*
*
* 清掉所有位置的空白格的绘图
*/
function clearAllNullPoint() {
for (var i = 0; i < maxY; i++) {
for (var j = 0; j < maxX; j++) {
if (gameMap[i][j] == false) { clearBlockByPoint(i, j); }
}
}
}
/*
*
* 绘制网格线
* @paramcontext 绘图对象
*/
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>