canvasã®ãƒ†ã‚¹ãƒˆHTML5ã®ç›®çŽ‰æ©Ÿèƒ½(?)ã€canvasè¦ç´ ã¨Javascriptã§ã„ã‚ã„ã‚サンプル作æˆä¸ã€‚ç”»é¢ã‚’マウスクリックã§ãƒ‘ーティクルãŒå¸ç€ã™ã‚‹ã‚ˆã€‚ 追記：ã¡ã‚‡ã£ã¨ä¿®æ£ (19:30) Javascriptã®ã‚½ãƒ¼ã‚¹ã¯ã“ã‚“ãªæ„Ÿã˜ã€‚ [sourcecode language=â€javascriptâ€] const NUM = 500; //円ã®æ•° const WIDTH = 400; //ç”»é¢ã®å¹… const HEIGHT = 400; //ç”»é¢ã®é«˜ã• var speedX = new Array(NUM); //Xæ–¹å‘ã®ã‚¹ãƒ”ードã®é…列 var speedY = new Array(NUM); //Yæ–¹å‘ã®ã‚¹ãƒ”ードã®é…列 var locX = new Array(NUM); //円ã®ä¸å¿ƒä½ç½®ã®X座標ã®é…列 var locY = new Array(NUM); //円ã®ä¸å¿ƒä½ç½®ã®Y座標ã®é…列 var r
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