为啥我的坐标点击的和棋子落下的位置不一样？
var chessBoard =[];
var me =true;
var over = false;
//赢法数组
var wins =[];
//赢法的统计数组
var myWin =[];
var computerWin =[];
for (var i = 0; i < 15; i++) {
chessBoard[i]=[];
for (var j = 0; j < 15; j++) {
chessBoard[i][j]=0;
}
}
for (var i = 0;i<15; i++) {
wins[i] =[];
for(var j=0; j<15; j++){
wins[i][j] =[];
}
}
var count =0;
for (var i = 0; i < 15; i++) {
for(var j =0; j<11; j++){
// wins[0][0][0] = true;
// wins[0][1][0] = true;
// wins[0][2][0] = true;
// wins[0][3][0] = true;
// wins[0][4][0] = true;
// wins[0][1][1] = true;
// wins[0][2][1] = true;
// wins[0][3][1] = true;
// wins[0][4][1] = true;
// wins[0][5][1] = true;
for(var k=0; k<5; k++){
wins[i][j+k][count]= true;
}
count++;
}
}
for (var i = 0; i < 15; i++) {
for(var j =0; j<11; j++){
for(var k=0; k<5; k++){
wins[j+k][i][count]= true;
}
count++;
}
}
for (var i = 0; i < 11; i++) {
for(var j =0; j<11; j++){
for(var k=0; k<5; k++){
wins[i+k][j+k][count]= true;
}
count++;
}
}
for (var i = 0; i < 11; i++) {
for(var j =14; j>3; j--){
for(var k=0; k<5; k++){
wins[i+k][j-k][count]= true;
}
count++;
}
}
console.log(count);
for(var i=0; i<count; i++){
myWin =0;
computerWin[i]=0;
}
var chess = document.getElementById('chess');
var context = chess.getContext('2d');
context.strokeStyle = "#BFBFBF";
var logo = new Image();
logo.src ="images/white.png";
logo.onload =function(){
context.drawImage(logo,0,0,450,450);
drawChessBoard();
}
var drawChessBoard = function(){
for(var i=0; i<15;i++){
context.moveTo(15 + i*30, 15);
context.lineTo(15 + i*30, 435);
context.stroke();
context.moveTo(15, 15 + i*30);
context.lineTo(435, 15 + i*30);
context.stroke();
}
}
var oneStep = function(i,j,me){
context.beginPath();
context.arc(15 + i*30, 15 + j*30,13,0,2*Math.PI);
context.closePath();
var gradient = context.createRadialGradient(15 + i*30 + 2, 15 + j*30 - 2, 13, 15 + i*30 + 2, 15 + j*30 - 2,0);
if (me) {
gradient.addColorStop(0,"#0A0A0A");
gradient.addColorStop(1,"#636766");
}else{
gradient.addColorStop(0,"#D1D1D1");
gradient.addColorStop(1,"#F9F9F9");
}
context.fillStyle=gradient;
context.fill();
}
chess.onclick = function(e){
if(over){
return;
}
if(!me){
return;
}
var x = e.offsetX;
var y = e.offsetY;
var i = Math.floor(x / 30);
var j = Math.floor(x / 30);;
if(chessBoard[i][j] ==0){
oneStep (i , j , me);
chessBoard[i][j] = 1;
for(var k =0 ; k<count; k++){
if(wins[i][j][k]){
myWin[k]++;
computerWin[k]=6;
if(myWin[k]==5){
window.alert("你赢了");
over = true;
}
}
}
if(!over){
me = !me;
computerAl();
}
}
}
var computerAl = function(){
var myScore = [];
var computerScore = [];
var max = 0;
var u = 0, v = 0;
for (var i = 0; i < 15; i++) {
myScore[i] = [];
computerScore[i] =[];
for(var j=0; j<15; j++){
myScore[i][j] = 0;
computerScore[i][j] =0;
}
}
for(var i=0; i<15;i++){
for(var j=0; j<15; j++){
if(chessBoard[i][j]==0){
for(var k=0;k<count; k++){
if(wins[i][j][k]){
if(myWin[k] == 1){
myScore[i][j]+=200;
}else if(myWin[k] ==2){
myScore[i][j]+=400;
}else if(myWin[k] ==3){
myScore[i][j]+=2000;
}else if(myWin[k] ==4){
myScore[i][j]+=10000;
}
if(computerWin[k] == 1){
computerScore[i][j]+=220;
}else if(computerWin[k] ==2){
computerScore[i][j]+=420;
}else if(computerWin[k] ==3){
computerScore[i][j]+=2100;
}else if(computerWin[k] ==4){
computerScore[i][j]+=20000;
}
}
}
if(myScore[i][j] > max){
max = myScore[i][j];
u =i;
v =j;
}else if(myScore[i][j] ==max){
if(computerScore[i][j]> computerScore[u][v]){
u = i;
v = j;
}
}
if(computerScore[i][j] > max){
max = computerScore[i][j];
u =i;
v =j;
}else if(computerScore[i][j] ==max){
if(myScore[i][j]> myScore[u][v]){
u = i;
v = j;
}
}
}
}
}
oneStep(u,v,false);
chessBoard[u][v] =2;
for(var k=0; k<count; k++){
if(wins[u][v][k]){
computerWin[k]++;
myWin[k] =6;
if(computerWin[k] == 5){
window.alert("计算机赢了");
over = true;
}
}
}
if(!over){
me = !me;
}
}
