44 lines
906 B
JavaScript
44 lines
906 B
JavaScript
function Grid()
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{
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Layer.call(this);
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this.el.id = "grid";
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this.draw = function(size = 60, step = 5)
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{
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this.clear();
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var x = 1;
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var size = size * 2;
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while(x < this.el.width/size){
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var y = 1;
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while(y < (this.el.height/size)-1){
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var is_marker = (x % step == 0 && y % step == 0)
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this.draw_vertex(x * size,y * size,is_marker)
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y += 1;
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}
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x += 1;
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}
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}
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this.draw_vertex = function(x,y,is_marker)
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{
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var ctx = this.context();
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var r = 1.5;
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ctx.beginPath();
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ctx.arc(x, y, 1.5, 0, 2 * Math.PI, false);
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ctx.fillStyle = is_marker ? '#000' : '#ccc';
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ctx.fill();
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ctx.closePath();
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}
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this.resize_to = function(size)
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{
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this.el.width = size.width * 2;
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this.el.height = size.height * 2;
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this.el.style.width = size.width+"px";
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this.el.style.height = size.height+"px";
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this.draw();
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}
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} |