var tangram=[ {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}],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"); var context=canvas.getContext("2d"); canvas.width=800; canvas.height=800; for(var i=0;i<tangram.length;i++){ draw(tangram[i],context) } }; function draw(piece,ctx){ ctx.beginPath(); ctx.moveTo(piece.p[0].x,piece.p[0].y); for(var i=1; i<piece.p.length;i++){ ctx.lineTo(piece.p[i].x,piece.p[i].y); }; ctx.closePath(); ctx.fillStyle=piece.color; ctx.fill(); }
你第五个p少了坐标:{x:200,y:600}