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                [TOC] ## 平移 ``` translate(x, y) ``` 用來移動 canvas 的原點到指定的位置 x 是左右偏移量,y 是上下偏移量 在做變形之前先`save()`是一個良好的習慣。大多數情況下,調用`restore`方法比手動恢復原先的狀態要簡單得多 ![](https://www.runoob.com/wp-content/uploads/2018/12/829832336-5b74dd8e3ad9a_articlex.png) ### 實例 ``` var draw=()=>{ let canvas = document.querySelector("#tutorial"); if(!canvas.getContext)return; /** * @type CanvasRenderingContext2D */ let ctx = canvas.getContext("2d"); ctx.save() // 保存坐標原點的狀態 ctx.translate(100,100) ctx.strokeRect(0,0,100,100) ctx.restore() // 還原到原點 ctx.strokeRect(0,0,50,50) } ``` ![](../../images/screenshot_1624516386692.png)
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