慕UI0851990
2016-02-07 14:14
给最后一个for循环后面的加上{},效果不显示了出来。请问这是为什么?
我的是可以的...检查一下?
var tangram = [
//二维数组,顶点坐标,颜色
{p:[{x:0,y:0},{x:800,y:0},{x:400,y:400}],color:"#caff67"},
{p:[{x:0,y:0},{x:400,y:400},{x:0,y:800}],color:"#67becf"},
{p:[{x:800,y:0},{x:800,y:400},{x:600,y:600},{x:600,y:200}],color:"#ef3d61"},
{p:[{x:600,y:200},{x:600,y:600},{x:400,y:400}],color:"#f9f51a"},
{p:[{x:400,y:400},{x:600,y:600},{x:400,y:800},{x:200,y:600}],color:"#a594c0"},
{p:[{x:200,y:600},{x:400,y:800},{x:0,y:800}],color:"#fa8ecc"},
{p:[{x:800,y:400},{x:800,y:800},{x:400,y:800}],color:"#f6ca29"}
];
window.onload = function(){
var canvas = document.getElementById("canvas");
canvas.width = 800;
canvas.height = 800;
var context = canvas.getContext("2d");
for( var i = 0; i < tangram.length; i++){
draw( tangram[i], context)
}
}
function draw( piece, cxt){
cxt.beginPath();
cxt.moveTo(piece.p[0].x, piece.p[0].y);
for( var i=1; i<piece.p.length; i++){
cxt.lineTo(piece.p[i].x, piece.p[i].y);
}
cxt.closePath();
cxt.fillStyle = piece.color;
cxt.fill();
cxt.strokeStyle = "black";
cxt.lineWidth = 3;
cxt.stroke();
}
for后面的括号会不会是位置发错了呢?
for(var i=0 ;i<digit[num].length;i++) for(var j=0;j<digit[num][i].length;j++) if(digit[num][i][j] == 1){ cxt.beginPath(); cxt.arc(x+j*2*(RADIUS+1)+(RADIUS+1),y+i*2*(RADIUS+1)+(RADIUS+1),RADIUS,0,2*Math.PI) cxt.closePath() cxt.fill() }
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