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HTML Canvas setTransform() 方法
tryhtml5_canvas_setTransform
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<!DOCTYPE html> <html> <body> <h1>HTML5 Canvas</h1> <h2>The setTransform() Method</h2> <canvas id="myCanvas" width="300" height="150" style="border:1px solid grey"></canvas> <script> const c = document.getElementById("myCanvas"); const ctx = c.getContext("2d"); ctx.fillStyle = "yellow"; ctx.fillRect(0, 0, 250, 100) ctx.setTransform(1,0.5, -0.5, 1, 30, 10); ctx.fillStyle = "red"; ctx.fillRect(0, 0, 250, 100); ctx.setTransform(1,0.5, -0.5, 1, 30, 10); ctx.fillStyle = "blue"; ctx.fillRect(0, 0, 250, 100); </script> </body> </html>