在本教學中，我們將學習如何使用 FabricJS 垂直翻轉 Circle 物件。圓形是 FabricJS 提供的各種形狀之一。為了創建一個圓圈，我們必須創建一個 Fabric.Circle 類別的實例並將其添加到畫布中。我們可以使用 flipY 屬性垂直翻轉圓形物件。
語法
new fabric.Circle({ flipY: Boolean }: Object)登入後複製
參數
#選項（可選） - 此參數是一個物件< /em> 為我們的圈子提供額外的客製化。使用此參數，可以變更與 flipY 為屬性的物件相關的顏色、遊標、描邊寬度和許多其他屬性等屬性。
選項鍵
範例1
將flipY 作為帶有' 的鍵傳遞false' 值
################################讓我們看一個範例，向我們展示FabricJS 中圓形物件的預設方向。由於我們向 ###flipY### 屬性傳遞了一個 false 值，因此圓形物件將不會垂直翻轉。 ###<!DOCTYPE html>
<html>
<head>
<!-- Adding the Fabric JS Library-->
<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script>
</head>
<body>
<h2>How to flip a Circle vertically using FabricJS?</h2>
<p>This is the default orientation of the object. We have set <b>flipY</b> as False, but even if we don't use it, <b>flipY</b> will be by default set to False. </p>
<canvas id="canvas"></canvas>
<script>
// Initiate a canvas instance
var canvas = new fabric.Canvas("canvas");
var circle = new fabric.Circle({
left: 215,
top: 50,
fill: "green",
radius: 80,
stroke: "#228b22",
strokeWidth: 2,
flipY: false
});
// Create gradient fill
circle.set("fill", new fabric.Gradient({
type: "linear",
coords: {
x1: 0,
y1: 0,
x2: 0,
y2: 50
},
colorStops: [{
offset: 0,
color: "red"
}, {
offset: 1,
color: "green"
}, ],
}));
// Adding them to the canvas
canvas.add(circle);
canvas.setWidth(document.body.scrollWidth);
canvas.setHeight(250);
</script>
</body>
</html>登入後複製
<!DOCTYPE html>
<html>
<head>
<!-- Adding the Fabric JS Library-->
<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script>
</head>
<body>
<h2>How to flip a Circle vertically using FabricJS?</h2>
<p>Here observe that the circle has flipped vertically (see the gradient), as we have set <b>flipY</b> to True.</p>
<canvas id="canvas"></canvas>
<script>
// Initiate a canvas instance
var canvas = new fabric.Canvas("canvas");
var circle = new fabric.Circle({
left: 215,
top: 50,
fill: "green",
radius: 80,
stroke: "#228b22",
strokeWidth: 2,
flipY: true
});
// Create gradient fill
circle.set("fill", new fabric.Gradient({
type: "linear",
coords: {
x1: 0,
y1: 0,
x2: 0,
y2: 50
},
colorStops: [{
offset: 0,
color: "red"
}, {
offset: 1,
color: "green"
}, ],
}));
// Adding them to the canvas
canvas.add(circle);
canvas.setWidth(document.body.scrollWidth);
canvas.setHeight(250);
</script>
</body>
</html>登入後複製
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