canvas繪製網格程式碼例項

admin發表於2018-06-05
Canvas

分享一段程式碼例項，它實現了利用canvas繪製網格的功能。

程式碼例項如下:

[HTML] 純文字檢視 複製程式碼執行程式碼
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="author" content="http://www.softwhy.com/" />
<title>螞蟻部落</title>
</head>
<body>
<canvas id="canvas" width="500" height="500"></canvas>
<script>
var canvas = document.getElementById("canvas"),
  context = canvas.getContext('2d');
 
//function
 
function drawGrid(context, color, stepx, stepy) {
  context.strokeStyle = color;
  context.lineWidth = 0.5;
 
  for (var i = stepx + 0.5; i < context.canvas.width; i += stepx) {
    context.beginPath();
    context.moveTo(i, 0);
    context.lineTo(i, context.canvas.height);
    context.stroke();
  }
  for (var i = stepy + 0.5; i < context.canvas.height; i += stepy) {
    context.beginPath();
    context.moveTo(0, i);
    context.lineTo(context.canvas.width, i);
    context.stroke();
  }
}
//Initialization
drawGrid(context, 'lightgray', 10, 10);
</script>
</body>
</html>

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