回答編集履歴
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追記
test
CHANGED
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@@ -7,3 +7,55 @@
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大きな矩形の各頂点の座標を取得したいのであれば、以下のコードを参考してみてください。
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```js
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const bbox = rect.getBBox()
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const viewportElement = rect.viewportElement
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const screenCTM1 = rect.getScreenCTM()
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const screenCTM2 = viewportElement.getScreenCTM()
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.inverse()
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const svgPoint = viewportElement.createSVGPoint()
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svgPoint.x = bbox.x
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svgPoint.y = bbox.y
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const topLeft = svgPoint.matrixTransform(screenCTM1)
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.matrixTransform(screenCTM2)
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svgPoint.x += bbox.width
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const topRight = svgPoint.matrixTransform(screenCTM1)
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.matrixTransform(screenCTM2)
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svgPoint.y += bbox.height
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const bottomRight = svgPoint.matrixTransform(screenCTM1)
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.matrixTransform(screenCTM2)
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svgPoint.x = bbox.x
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const bottomLeft = svgPoint.matrixTransform(screenCTM1)
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.matrixTransform(screenCTM2)
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```
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[https://codepen.io/anon/pen/jpJJzm](https://codepen.io/anon/pen/jpJJzm)
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