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七巧板實例

function canvas1(){
?? ?var canvas1 = document.getElementById("canvas1");
?? ?var context1 = canvas1.getContext("2d");
?? ?canvas1.width = 500;
?? ?canvas1.height = 500;
?? ?var arr = [
?? ??? ?{p:[{x:0,y:0},{x:0,y:500},{x:250,y:250},{x:0,y:0}],c:'#003333'},
?? ??? ?{p:[{x:0,y:0},{x:500,y:0},{x:250,y:250},{x:0,y:0}],c:'#003366'},
?? ??? ?{p:[{x:0,y:500},{x:250,y:500},{x:125,y:375},{x:0,y:500}],c:'#336666'},
?? ??? ?{p:[{x:250,y:500},{x:375,y:375},{x:250,y:250},{x:125,y:375},{x:250,y:500}],c:'#0066cc'},
?? ??? ?{p:[{x:250,y:500},{x:500,y:500},{x:500,y:250},{x:250,y:500}],c:'#99cccc'},
?? ??? ?{p:[{x:250,y:250},{x:375,y:375},{x:375,y:125},{x:250,y:250}],c:'#006699'},
?? ??? ?{p:[{x:375,y:375},{x:500,y:250},{x:500,y:0},{x:375,y:125},{x:375,y:375}],c:'#0066ff'},
?? ??? ?];
?? ?for(i = 0; i < arr.length; i++ ){
?? ??? ?context1.beginPath()
?? ??? ?context1.moveTo(arr[i]['p'][0]['x'],arr[i]['p'][0]['y']);
?? ??? ?for(j = 1; j < arr[i]['p'].length; j++){
?? ??? ??? ?context1.lineTo(arr[i]['p'][j]['x'],arr[i]['p'][j]['y']);
?? ??? ??? ?}
?? ??? ?context1.closePath();
?? ??? ?context1.fillStyle = arr[i]['c'];
?? ??? ?context1.fill();
?? ??? ?}
?? ?}