1 2 3 4 5 6 7 8 9 10 11 12 13 | var backgroundOffset; // This is set before calling drawBackground() function drawBackground() { context.translate(-backgroundOffset, 0); // Initially onscreen: context.drawImage(background, 0, 0); // Initially offscreen: context.drawImage(background, background.width, 0); context.translate(backgroundOffset, 0); } |
欢迎光临 电子技术论坛_中国专业的电子工程师学习交流社区-中电网技术论坛 (http://bbs.eccn.com/) | Powered by Discuz! 7.0.0 |