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'm retired http://www.blackmanband.com/stmap_64tgzttt.html?venlor.zestril.dramamine.cialis garden state pharmacy owners The email to lawmakers said the primary complaint against Mayorkas was that he helped a financing company run by Rodham to win approval for an investor visa, even after the application was denied and an appeal was rejected.
There's a three month trial period http://narsg.uk/stmap_21ojktcc.html?cialis.himcocid.deltasone.isoptin depo-medrol 40 mg/ml cena Mary Creagh, Labour’s new shadow transport secretary, warned that she would scrutinise every line of the government’s business case for the scheme to ensure that the cost was justified.
I was born in Australia but grew up in England http://www.missionarygeek.com/stmap_64mvltdi.html?viagra.megalis.escitalopram flucloxacillin and drinking tea It’s easy for people to judge others, like the two comments above, but neither has been deployed over seas and neither I’m sure have fought for this country in any matter whatsoever. The guy flipped out and lost himself, it happens. He should have used the insanity defense, he obviously did not have proper legal counsel. Maybe he can shack up with Chelsea Manning now at Levenworth and they both can keep the delusions alive. I feel bad for Bale’s wife and kids, they are the ones that are going to lose out, oh and also for all those Afghans that he maimed.
I'm not sure http://www.helloartdept.com/wordpress/stmap_64mvltdi.html?viagra.azelastine.digoxin.evecare ciprofloxacin hcl for sore throat The story struck a nerve when Nodaway County prosecutor Robert Rice dropped felony charges against the alleged assailant and a second 17-year-old who recorded the incident on his cellphone. Rice has said the family stopped cooperating, which the family denies, and that there was not enough evidence to move forward with the case.
I've got a part-time job https://www.singingriverretirement.com/stmap_21snbbax.html?cellcept.precose.ciprofloxacin.viagra ivermectin kupit slovensko Another problem is agencies like the Food and Drug Administration and the U.S. Department of Agriculture. Their inspectors frown upon unregulated sale of wild game and foraged plants to the public. There are safety and quality standards to be met, and processors who must be held accountable.
Looking for a job http://www.helloartdept.com/wordpress/stmap_39bocxge.html?dexamethason.ranitidine.levitra diclofenac sodium 75 mg side effects The Co-op is to lose control of its banking arm to bondholders as part of a restructuring to fill a £1.5bn black hole in its balance sheet, therefore the falling sales in its retail chain is another setback for the group.