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本篇内容主要讲解“CSS3 如何实现穿梭星空动画功能”,感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷,实用性强。下面就让小编来带大家学习“CSS3 如何实现穿梭星空动画功能”吧!
创新互联是网站建设专家,致力于互联网品牌建设与网络营销,专业领域包括成都网站设计、做网站、电商网站制作开发、微信平台小程序开发、微信营销、系统平台开发,与其他网站设计及系统开发公司不同,我们的整合解决方案结合了恒基网络品牌建设经验和互联网整合营销的理念,并将策略和执行紧密结合,且不断评估并优化我们的方案,为客户提供全方位的互联网品牌整合方案!实现效果:
html
css
* { background:black; padding:0; margin:0; } canvas { padding:0; margin:0; width:100%; height:100%; }
js
function $i(t) { return document.getElementById(t) } function $r(t, r) { document.getElementById(t).removeChild(document.getElementById(r)) } function $t(t) { return document.getElementsByTagName(t) } function $c(t) { return String.fromCharCode(t) } function $h(t) { return ("0" + Math.max(0, Math.min(255, Math.round(t))).toString(16)).slice(-2) } function _i(t, r) { $t("div")[t].innerHTML += r } function _h(t) { return hires ? Math.round(t / 2) : t } function get_screen_size() { var t = document.documentElement.clientWidth, r = document.documentElement.clientHeight; return Array(t, r) } function init() { for (var t = 0; n > t; t++) star[t] = new Array(5), star[t][0] = Math.random() * w * 2 - 2 * x, star[t][1] = Math.random() * h * 2 - 2 * y, star[t][2] = Math.round(Math.random() * z), star[t][3] = 0, star[t][4] = 0; var r = $i("starfield"); r.style.position = "absolute", r.width = w, r.height = h, context = r.getContext("2d"), context.fillStyle = "rgb(0,0,0)", context.strokeStyle = "rgb(255,255,255)" } function anim() { mouse_x = cursor_x - x, mouse_y = cursor_y - y, context.fillRect(0, 0, w, h); for (var t = 0; n > t; t++) test = !0, star_x_save = star[t][3], star_y_save = star[t][4], star[t][0] += mouse_x >> 4, star[t][0] > x << 1 && (star[t][0] -= w << 1, test = !1), star[t][0] < -x << 1 && (star[t][0] += w << 1, test = !1), star[t][1] += mouse_y >> 4, star[t][1] > y << 1 && (star[t][1] -= h << 1, test = !1), star[t][1] < -y << 1 && (star[t][1] += h << 1, test = !1), star[t][2] -= star_speed, star[t][2] > z && (star[t][2] -= z, test = !1), star[t][2] < 0 && (star[t][2] += z, test = !1), star[t][3] = x + star[t][0] / star[t][2] * star_ratio, star[t][4] = y + star[t][1] / star[t][2] * star_ratio, star_x_save > 0 && w > star_x_save && star_y_save > 0 && h > star_y_save && test && (context.lineWidth = 2 * (1 - star_color_ratio * star[t][2]), context.beginPath(), context.moveTo(star_x_save, star_y_save), context.lineTo(star[t][3], star[t][4]), context.stroke(), context.closePath()); timeout = setTimeout("anim()", fps) } function start() { resize(), anim() } function resize() { w = parseInt(-1 != url.indexOf("w=") ? url.substring(url.indexOf("w=") + 2, -1 != url.substring(url.indexOf("w=") + 2, url.length).indexOf("&") ? url.indexOf("w=") + 2 + url.substring(url.indexOf("w=") + 2, url.length).indexOf("&") : url.length) : get_screen_size()[0]), h = parseInt(-1 != url.indexOf("h=") ? url.substring(url.indexOf("h=") + 2, -1 != url.substring(url.indexOf("h=") + 2, url.length).indexOf("&") ? url.indexOf("h=") + 2 + url.substring(url.indexOf("h=") + 2, url.length).indexOf("&") : url.length) : get_screen_size()[1]), x = Math.round(w / 2), y = Math.round(h / 2), z = (w + h) / 2, star_color_ratio = 1 / z, cursor_x = x, cursor_y = y, init() } var url = document.location.href, flag = !0, test = !0, n = parseInt(-1 != url.indexOf("n=") ? url.substring(url.indexOf("n=") + 2, -1 != url.substring(url.indexOf("n=") + 2, url.length).indexOf("&") ? url.indexOf("n=") + 2 + url.substring(url.indexOf("n=") + 2, url.length).indexOf("&") : url.length) : 812), w = 0, h = 0, x = 0, y = 0, z = 0, star_color_ratio = 0, star_x_save, star_y_save, star_ratio = 115, star_speed = 5, star_speed_save = 0, star = new Array(n), color, opacity = .1, cursor_x = 0, cursor_y = 0, mouse_x = 0, mouse_y = 0, canvas_x = 0, canvas_y = 0, canvas_w = 0, canvas_h = 0, context, key, ctrl, timeout, fps = 0; start();
到此,相信大家对“CSS3 如何实现穿梭星空动画功能”有了更深的了解,不妨来实际操作一番吧!这里是创新互联建站,更多相关内容可以进入相关频道进行查询,关注我们,继续学习!
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