mingxinice
2018-04-27 19:19
var WINDOW_WIDTH = 1024; var WINDOW_HEIGHT = 768; var RADIUS = 8; var MARGIN_TOP = 60; var MARGIN_LEFT = 30; const endTime = new Date(2018, 3, 28, 22, 47, 52); var curShowTimeSeconds = 0; var balls = []; var colors = ["#FFCC00", "#FFCC00", "#CC0033", "#990066", "#990066", "#009966", "#339999", "#669999", "#663366", "#CCCC00", "#99CC00", "#FF3399", "#99CC00", "#990033", "#999900", "#009966"]; window.onload = function () { var canvas = document.getElementById("canvas"); var context = canvas.getContext("2d"); canvas.width = WINDOW_WIDTH; canvas.height = WINDOW_HEIGHT; curShowTimeSeconds = getCurShowTimeSeconds(); setInterval(function () { render(context); update(); }, 50) } function getCurShowTimeSeconds() { var curTime = new Date(); var ret = endTime.getTime() - curTime.getTime(); ret = Math.round(ret / 1000); return ret >= 0 ? ret : 0; console.log("getCurShowTimeSeconds") } function update() { var nextShowTimeSeconds = getCurShowTimeSeconds(); var nextHours = parseInt(nextShowTimeSeconds / 3600); var nextMinutes = parseInt((nextShowTimeSeconds - nextHours * 3600) / 60); var nextSeconds = nextShowTimeSeconds % 60; var curHours = parseInt(curShowTimeSeconds / 3600); var curMinutes = parseInt((curShowTimeSeconds - curHours * 3600) / 60); var curSeconds = curShowTimeSeconds % 60; if (nextSeconds != curSeconds) { if (parseInt(nextHours / 10) != parseInt(curHours / 10)) { addBalls(MARGIN_LEFT + 0, MARGIN_TOP, parseInt(curHours / 10)); } if (parseInt(nextHours % 10) != parseInt(curHours % 10)) { addBalls(MARGIN_LEFT + 15 * (RADIUS + 1), MARGIN_TOP, parseInt(curHours % 10)); } if (parseInt(nextMinutes / 10) != parseInt(curMinutes / 10)) { addBalls(MARGIN_LEFT + 39 * (RADIUS + 1), MARGIN_TOP, parseInt(curMinutes / 10)); } if (parseInt(nextMinutes % 10) != parseInt(curMinutes % 10)) { addBalls(MARGIN_LEFT + 54 * (RADIUS + 1), MARGIN_TOP, parseInt(curMinutes % 10)); } if (parseInt(nextSeconds / 10) != parseInt(curSeconds / 10)) { addBalls(MARGIN_LEFT + 78 * (RADIUS + 1), MARGIN_TOP, parseInt(curSeconds / 10)); } if (parseInt(nextSeconds % 10) != parseInt(curSeconds % 10)) { addBalls(MARGIN_LEFT + 93 * (RADIUS + 1), MARGIN_TOP, parseInt(nextSeconds % 10)); } curShowTimeSeconds = nextShowTimeSeconds; } updateBalls(); console.log("update") } function updateBalls() { for (var i = 0; i < balls.length; i++) { balls[i].x += balls[i].vx; balls[i].y += balls[i].vy; balls[i].vy += balls[i].g; if (balls[i].y >= WINDOW_HEIGHT - RADIUS) { balls[i].y = WINDOW_HEIGHT - RADIUS; balls[i].vy = -balls[i].vy * 0.75; } } console.log("updateBalls") } function addBalls(x, y, num) { for (var i = 0; i < digit[num].length; i++) { for (var j = 0; j < digit[num][i].length; j++) { if (digit[num][i][j] == 1) { var aBAll = { x: x + j * 2 * (RADIUS + 1) + (RADIUS + 1), y: y + i * 2 * (RADIUS + 1) + (RADIUS + 1), g: 1.5 + Math.random(), vx: Math.pow(-1, Math.ceil(Math.random() * 1000)) * 4, vy: -5, color: colors[Math.floor(Math.random() * colors.length)] } } balls.push(aBAll); } } console.log(balls) } function render(cxt) { cxt.clearRect(0, 0, WINDOW_WIDTH, WINDOW_HEIGHT); var hours = parseInt(curShowTimeSeconds / 3600); var minutes = parseInt((curShowTimeSeconds - hours * 3600) / 60); var seconds = curShowTimeSeconds % 60; if (hours > 78) { alert("请配置未来三天以内的任意时间") } else { renderDigit(MARGIN_LEFT, MARGIN_TOP, parseInt(hours / 10), cxt); renderDigit(MARGIN_LEFT + 15 * (RADIUS + 1), MARGIN_TOP, parseInt(hours % 10), cxt); renderDigit(MARGIN_LEFT + 30 * (RADIUS + 1), MARGIN_TOP, 10, cxt); renderDigit(MARGIN_LEFT + 39 * (RADIUS + 1), MARGIN_TOP, parseInt(minutes / 10), cxt); renderDigit(MARGIN_LEFT + 54 * (RADIUS + 1), MARGIN_TOP, parseInt(minutes % 10), cxt); renderDigit(MARGIN_LEFT + 69 * (RADIUS + 1), MARGIN_TOP, 10, cxt); renderDigit(MARGIN_LEFT + 78 * (RADIUS + 1), MARGIN_TOP, parseInt(seconds / 10), cxt); renderDigit(MARGIN_LEFT + 93 * (RADIUS + 1), MARGIN_TOP, parseInt(seconds % 10), cxt); } for (var i = 0; i < balls.length; i++) { cxt.fillStyle = balls[i].color; cxt.beginPath(); cxt.arc(balls[i].x, balls[i].y, RADIUS, 0, 2 * Math.PI,true); cxt.closePath(); cxt.fill(); } } function renderDigit(x, y, num, cxt) { cxt.fillStyle = "gold"; for (var i = 0; i < digit[num].length; i++) { for (var j = 0; j < digit[num][i].length; j++) { if (digit[num][i][j] == 1) { cxt.beginPath(); cxt.arc(x + j * 2 * (RADIUS + 1) + (RADIUS + 1), y + i * 2 * (RADIUS + 1) + (RADIUS + 1), RADIUS, 0, 2 * Math.PI); cxt.closePath(); cxt.fill(); } } } }
这个地方有错误 要把balls.push(aBAll);写入if条件语句里
if (digit[num][i][j] == 1) {
color: colors[Math.floor(Math.random() * colors.length)]
}
balls.push(aBAll); 写这里才是对的
}
balls.push(aBAll);你的在条件语句外面
}
这里最后有个小错误,你写得是 parseInt(nextSeconds% 10)
if (parseInt(nextSeconds % 10) != parseInt(curSeconds % 10)) {
addBalls(MARGIN_LEFT + 93 * (RADIUS + 1), MARGIN_TOP, parseInt(curSeconds % 10));
cxt.arc(balls[i].x, balls[i].y, RADIUS, 0, 2 * Math.PI,true); 把true去掉
炫丽的倒计时效果Canvas绘图与动画基础
96746 学习 · 1000 问题
相似问题