如何在FabricJS中将旋转点位置更改为底部? [英] How to change Rotating point position to bottom in FabricJS?

问题描述

如何将旋转点"的位置更改为底部(请参见下图)?

How to change "Rotating point" position to the bottom (see image below) ?

这是选择对象的配置控制点的链接指南. http://fabricjs.com/fabric-intro-part-4#customization

And here is the link guide to configuration controls point of selecting object. http://fabricjs.com/fabric-intro-part-4#customization

谢谢！

推荐答案

只需使用角度将圆旋转180度，如果对象不是圆，则旋转点"位于底部，添加flipY混合以保持物体直立.

Just use the angle to rotate the circle 180 degrees and the "Rotating point" will be at the bottom, if the object is something other than a circle add flipY to the mix to keep the object upright.

<canvas id="canvas" width="170" height="170"></canvas>

<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/2.3.4/fabric.min.js"></script>

<script>
  var obj = new fabric.Triangle({
    fill: 'lime',
    top: 110,
    left: 110,
    angle: 180,
    flipY: true,
    borderColor: 'red',
    cornerColor: 'cyan',
    cornerSize: 9,
    transparentCorners: false
  });
  
  var canvas = new fabric.Canvas('canvas');
  canvas.add(obj);
  canvas.setActiveObject(canvas.item(0));
</script>

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