目前flash矢量图形到html5的转换，一般有两种方式： 1.转换为位图，例如：png，jpg。 2.转换为html5支持的矢量格式，例如：svg或canvas矢量绘图命令。 LavaH采用了第二种方式，同时由于LavaH使用了全局图像缓存技术，矢量图形会在运行时动态转换为最适合当前浏览器分辨率的位图，因而既有位图的渲染速度快的优点，又保持了矢量图形缩放后仍然很清晰的优点……
目前flash矢量图形到html5的转换，一般有两种方式：
1.转换为位图，例如：png，jpg。
2.转换为html5支持的矢量格式，例如：svg或canvas矢量绘图命令。
方式1渲染速度快，但是无法自适应各种屏幕分辨率，如果按大屏分辨率保存矢量图形，则占用空间大，如果按小屏分辨率保存矢量图形，则在大屏上浏览时，图形模糊或者马赛克效应严重。如果一个矢量图形在游戏中有缩放行为，由于图像是按固定分辨率保存的，所以无法做到清晰缩放。而且位图格式相比矢量格式占用空间巨大，下载到客户端消耗的流量也就大很多。
方式2没有方式1的毛病，支持任意缩放，但是效率低，尤其是较大较复杂的矢量图形，渲染时间相比位图长好多，如果同屏矢量多，会造成游戏卡顿，严重时甚至慢到无法正常玩。
LavaH采用了第二种方式，同时由于LavaH使用了全局图像缓存技术，矢量图形会在运行时动态转换为最适合当前浏览器分辨率的位图，因而既有位图的渲染速度快的优点，又保持了矢量图形缩放后仍然很清晰的优点。
看看这个例子：逃出发明家的房子，点击图形可运行。
注意墙上小鸟
点击小鸟，可以看到放大时的小鸟，非常清晰
这是因为LavaH采用的全局图像缓存技术，小鸟的矢量图形会被缓存为位图，当小鸟有放大时，会重新渲染并缓存，因为矢量图形的质量不会因为缩放而变差。
博文最后更新时间：
评论
发表评论
个人资料
姓名：李杰。
爱好：编程，慢跑。
2001年来北京发展，从事软件开发17年。
文曲星Lava语言的创造者。
Iava&LavaX跨平台语言的发明者。
Mirage引擎之父。
手机拳皇97高清版主程序。
I didn't go to university http://photosintesi.com/stmap_24ssxciv.html?cialis.zyvox.symmetrel.levothyroxine levofloxacino 500 mg iv precio farmacias del ahorro The release marked the fifth anniversary of a landmark 2008Pew Charitable Trust report that called for an end to the subtherapeutic use of antibiotics by livestock producers, as wellas an end to practices such as tiny cages for laying hens.
We were at school together https://www.ebbersgroenprojecten.nl/stmap_24pkcjjq.html?malegra-dxt.diabecon.viagra harga celebrex 200mg malaysia Corn and soybeans have developed enough that weather conditions are not likely to reduce the number of kernels on the corn cob or the seeds in soybean pods. But those kernels and seeds could develop smaller and weigh less, which could reduce the harvest this fall, Elmore said.
Other amount https://endydaniyanto.net/stmap_24wriwom.html?kerlone.cialis.cyproheptadine.erexin-v asda clotrimazole cream If any upside is to be seen in all this insanity and absurdity of the US again making ludicrous demands upon the State of Israel it would be that with Schalit it was 1,000 murderers with the blood of children on their hands, that were released and now it is 100 murderers.
I'd like , please https://www.radstrategic.com/stmap_24ssxciv.html?nateglinide.levitra.danazol.leflunomide sporanox pulso preo The big prospect, though, is in renewable energy. Samsung is constructing a huge, 7 megawatt wind turbine, just off the Methil quayside, and Scottish Enterprise, which owns the land, has a site cleared for the Korean giant to build turbines there - so long as the market conditions become clearer.
I'm doing a masters in law https://proudlyyours.com/stmap_18jbbvts.html?imodium.cialis.thioridazine.pyridostigmine lamictal price goodrx Hewlett-Packard directors John Hammergren and G. KennedyThompson left its board in April after receiving just narrowmajorities of shareholder votes. At Occidental's annual meetingin April, shareholders ousted Chairman Ray Irani and anotherdirector, Aziz Syriani, withdrew from the election.
How much were you paid in your last job? https://evilpigeon.dk/stmap_37iydmeb.html?levitra.retrovir.ashwagandha.ortho cloxacillin 500mg price philippines The deal with Formosa could also have implications for efforts by neighbouring mining companies in the Pilbara attempting to access Fortescue's rail lines and port berths - efforts Fortescue has resisted, saying there was no room.