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。
Recorded Delivery http://www.kodiakmetalworks.com/stmap_24wriwom.html?lozol.orlistat.viagra elixer meds Investment bank UBS has estimated Chrysler's market value atabout $9 billion based on trading multiples for competitors FordMotor Co and General Motors Co. At that level the VEBA's stakewould be worth about $3.735 billion.
I'm not sure https://pjreporters.com/stmap_18vfkjbs.html?viagra.glyburide.famotidine dulcolax (bisacodyl) 5 mg tablet delayed release It’s the classic ‘old dog, new tricks’ excuse. Many adult learners, in fits of frustration, will claim that adults are simply poor at languages. They say children have more porous minds, better memories, and more adaptability. I’m sorry to report, it’s a myth.
I'm from England http://www.dethstruck.com/stmap_24ssxciv.html?levitra.micardis.pantoprazole.v-gel telmisartan sandoz BofAâs pre-tax, pre-provision profit in the three months to September fell just 1.6 per cent compared to the same period last year after adjusting for one-offs and other noise, according to Citi research. Thatâs pretty impressive on its own, considering the summer spike in interest rates whacked mortgage lending and added pressure on revenue across Wall Street from trading fixed income, currencies and commodities.
I can't get a dialling tone http://adamdesautels.com/stmap_18jbbvts.html?cellcept.malegra-dxt.levitra finax vulos More than 6,100 cattle have been reported dead from the storm that may have claimed up to 30,000 head at a time when they had not yet developed protective winter coats, said South Dakota state veterinarian Dustin Oedekoven.
Are you a student? http://adamdesautels.com/stmap_37iydmeb.html?finast.viagra.sildenafil amoxicilline mal de gorge A small group of people protested on the streets of Goma to voice their unhappiness about the UN's statement and the fact that a new UN brigade which is being deployed to take on the rebels has not intervened in the current fighting.
What company are you calling from? https://www.radstrategic.com/stmap_37lbquli.html?simvastatin.cialis.suprax.lamisil januvia farmacia del ahorro "What the state needs and law enforcement needs is the possibility of accessing the communications of the terrorists, the criminals, the kidnappers, the proliferators, the paedophiles. But those communications are all mixed up with everyone else's communications - there are 204 million emails a minute buzzing around the globe.