��权限没有,则隐藏 function forum_list_access_filter($forumlist, $gid, $allow = 'allowread') { global $grouplist; if (empty($forumlist)) return array(); if (1 == $gid) return $forumlist; $forumlist_filter = $forumlist; $group = $grouplist[$gid]; foreach ($forumlist_filter as $fid => $forum) { if (empty($forum['accesson']) && empty($group[$allow]) || !empty($forum['accesson']) && empty($forum['accesslist'][$gid][$allow])) { unset($forumlist_filter[$fid]); } unset($forumlist_filter[$fid]['accesslist']); } return $forumlist_filter; } function forum_filter_moduid($moduids) { $moduids = trim($moduids); if (empty($moduids)) return ''; $arr = explode(',', $moduids); $r = array(); foreach ($arr as $_uid) { $_uid = intval($_uid); $_user = user_read($_uid); if (empty($_user)) continue; if ($_user['gid'] > 4) continue; $r[] = $_uid; } return implode(',', $r); } function forum_safe_info($forum) { //unset($forum['moduids']); return $forum; } function forum_filter($forumlist) { foreach ($forumlist as &$val) { unset($val['brief'], $val['announcement'], $val['seo_title'], $val['seo_keywords'], $val['create_date_fmt'], $val['icon_url'], $val['modlist']); } return $forumlist; } function forum_format_url($forum) { global $conf; if (0 == $forum['category']) { // 列表URL $url = url('list-' . $forum['fid'], '', FALSE); } elseif (1 == $forum['category']) { // 频道 $url = url('category-' . $forum['fid'], '', FALSE); } elseif (2 == $forum['category']) { // 单页 $url = url('read-' . trim($forum['brief']), '', FALSE); } if ($conf['url_rewrite_on'] > 1 && $forum['well_alias']) { if (0 == $forum['category'] || 1 == $forum['category']) { $url = url($forum['well_alias'], '', FALSE); } elseif (2 == $forum['category']) { // 单页 $url = ($forum['threads'] && $forum['brief']) ? url($forum['well_alias'] . '-' . trim($forum['brief']), '', FALSE) : url($forum['well_alias'], '', FALSE); } } return $url; } function well_forum_alias() { $forumlist = forum_list_cache(); if (empty($forumlist)) return ''; $key = 'forum-alias'; static $cache = array(); if (isset($cache[$key])) return $cache[$key]; $cache[$key] = array(); foreach ($forumlist as $val) { if ($val['well_alias']) $cache[$key][$val['fid']] = $val['well_alias']; } return array_flip($cache[$key]); } function well_forum_alias_cache() { global $conf; $key = 'forum-alias-cache'; static $cache = array(); // 用静态变量只能在当前 request 生命周期缓存,跨进程需要再加一层缓存:redis/memcached/xcache/apc if (isset($cache[$key])) return $cache[$key]; if ('mysql' == $conf['cache']['type']) { $arr = well_forum_alias(); } else { $arr = cache_get($key); if (NULL === $arr) { $arr = well_forum_alias(); !empty($arr) AND cache_set($key, $arr); } } $cache[$key] = empty($arr) ? '' : $arr; return $cache[$key]; } ?>javascript - Animating multiple scenes in a sequence with ScrollMagic - Stack Overflow
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javascript - Animating multiple scenes in a sequence with ScrollMagic - Stack Overflow

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I am trying to rebuild this intro effect using ScrollMagic and GSAP: Notice how the intro 'slides' (with text) show and dissappear one after another when scrolling.

Basically, I have set up a stage controller, a scene (the containing div - '.hero-unit') and some tweens for the animation. However, I just can't get the hang of how to animate each slide (three in total) in such a order:

  1. You enter the website and start scrolling.
  2. The first slide is animated (using the staggerFromTo method).
  3. When the slide is fully animated, lower its opacity back to 0 (or move it out of the screen or whatever).
  4. Show the second slide, as in 2.
  5. Same as 3. and so on.

I tried everything that I managed to find as a solution on the internet. I tried using 'TimelineMax', tried hiding the slides when done animating them with onComplete, but nothing seems to work. Here's the code I have so far:

var pinOrigin = {
                opacity: 0
            };
            var pinEnd = {
                opacity: 1,
                yoyo: true,
                ease: Back.easeOut
            }

            var tl = TweenMax.staggerFromTo('.hero-unit .scene:first-of-type', 1, {opacity:0}, {opacity: 1});

            var pin = new ScrollScene({
                triggerElement: '.hero-unit',
                triggerHook: 'onLeave',
                duration: 1000
            }).setPin('.hero-unit').setTween(tl).addTo(controller);

To recap: how does one manage to stage different scenes and change between them with a nice transition while scrolling??

I am trying to rebuild this intro effect using ScrollMagic and GSAP: http://airnauts. Notice how the intro 'slides' (with text) show and dissappear one after another when scrolling.

Basically, I have set up a stage controller, a scene (the containing div - '.hero-unit') and some tweens for the animation. However, I just can't get the hang of how to animate each slide (three in total) in such a order:

  1. You enter the website and start scrolling.
  2. The first slide is animated (using the staggerFromTo method).
  3. When the slide is fully animated, lower its opacity back to 0 (or move it out of the screen or whatever).
  4. Show the second slide, as in 2.
  5. Same as 3. and so on.

I tried everything that I managed to find as a solution on the internet. I tried using 'TimelineMax', tried hiding the slides when done animating them with onComplete, but nothing seems to work. Here's the code I have so far:

var pinOrigin = {
                opacity: 0
            };
            var pinEnd = {
                opacity: 1,
                yoyo: true,
                ease: Back.easeOut
            }

            var tl = TweenMax.staggerFromTo('.hero-unit .scene:first-of-type', 1, {opacity:0}, {opacity: 1});

            var pin = new ScrollScene({
                triggerElement: '.hero-unit',
                triggerHook: 'onLeave',
                duration: 1000
            }).setPin('.hero-unit').setTween(tl).addTo(controller);

To recap: how does one manage to stage different scenes and change between them with a nice transition while scrolling??

Share Improve this question asked Feb 3, 2015 at 14:30 Georgi B. NikolovGeorgi B. Nikolov 9982 gold badges13 silver badges26 bronze badges 1
  • Okay, so I figured it out on my own. You have to use TimelineMax (or Lite I guess) and set up the different scenes movement relatively, using delays as such: – Georgi B. Nikolov Commented Feb 3, 2015 at 19:36
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2 Answers 2

Reset to default 4

Improving on your answer I would like to add that you can add the tweens to the timeline successively and they will automatically be added to the end of the timeline.

So a better way for your animation code would be:

var tl = new TimelineMax()
    .add(TweenMax.to('.hero-unit .scene:first-of-type', 1, {opacity: 1}))
    .add(TweenMax.to('.hero-unit .scene:first-of-type', 1, {opacity: 0}))
    .add(TweenMax.to('.hero-unit .scene:nth-of-type(2)', 1, {opacity:1}))
    .add(TweenMax.to('.hero-unit .scene:nth-of-type(2)', 1, {opacity:0}))
    .add(TweenMax.to('.hero-unit .scene:nth-of-type(3)', 1, {opacity:1}))
    .add(TweenMax.to('.hero-unit .scene:nth-of-type(3)', 1, {opacity:0}));

This way the code is a lot more managable in case you want to add anything at any time. For more information check http://greensock./docs/#/HTML5/GSAP/TimelineMax/add/

If all you want to do is add a .to tween to the end of the timeline you can make this even more concise by making use of the TimelineMax.to() method.
From GSAP Docs:

Adds a TweenLite.to() tween to the end of the timeline (or elsewhere using the "position" parameter) - this is a convenience method that acplishes exactly the same thing as add( TweenLite.to(...) ) but with less code.

So this would make this the best possible GSAP animation code for your purposes:

var tl = new TimelineMax()
    .to('.hero-unit .scene:first-of-type', 1, {opacity: 1})
    .to('.hero-unit .scene:first-of-type', 1, {opacity: 0})
    .to('.hero-unit .scene:nth-of-type(2)', 1, {opacity:1})
    .to('.hero-unit .scene:nth-of-type(2)', 1, {opacity:0})
    .to('.hero-unit .scene:nth-of-type(3)', 1, {opacity:1})
    .to('.hero-unit .scene:nth-of-type(3)', 1, {opacity:0});

Okay, so I figured it out on my own. You have to use TimelineMax (or Lite I guess) and set up the different scenes movement relatively, using delays as such:a

var tl = new TimelineMax().add([
                    TweenMax.to('.hero-unit .scene:first-of-type', 1, {opacity: 1}),
                    TweenMax.to('.hero-unit .scene:first-of-type', 1, {opacity: 0, delay: 1}),
                    TweenMax.to('.hero-unit .scene:nth-of-type(2)', 1, {opacity:1, delay: 2}),
                    TweenMax.to('.hero-unit .scene:nth-of-type(2)', 1, {opacity:0, delay: 3}),
                    TweenMax.to('.hero-unit .scene:nth-of-type(3)', 1, {opacity:1, delay: 4}),
                    TweenMax.to('.hero-unit .scene:nth-of-type(3)', 1, {opacity:0, delay: 5})
                ]);

            var pin = new ScrollScene({
                triggerElement: '.hero-unit',
                triggerHook: 0,
                duration: 2000
            }).setPin('.hero-unit').setTween(tl).addTo(controller);
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