for循环加上{}不显示效果
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?
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?
2016-02-07
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();
}
举报