野草.时光流逝

2007-09-18T09:28:00.000-07:00

自己写了个3ds max 导出插件，导出一个高精度人体模型，目前复合纹理没有处理，所以眼睛，头发，鞋子等的比纹理效果看不到。半夜了，累了，睡觉去。

吉普车

2007-09-11T07:38:00.000-07:00

从网上找到个吉普车模型，第一张是bumpmapping,第二张是reflective bump mapping.

shadow mapping

2007-09-07T07:53:00.000-07:00

想了好久终于想明白为什么需要那个Inverse eye view(look at) matrix..... 少了这个矩阵效果出不来好抓狂...

去远方

2007-09-05T23:55:00.001-07:00

      小时候记得有一首,我从来没听过,但我知道它的歌词,它的旋律.却找不到它的声音.

      去远方

      你曾约我去远方是否你遗忘
　　远方的风光多迷人叫我日夜向往
　　你曾约我去远方是否你遗忘
　　何时能与你同游是我甜美的梦想
　　
　　那青青的山那绿绿的林
　　那淡淡的花茵茵的草
　　等待我们去徜徉
　　那蓝蓝的海那柔柔的浪
　　暖暖沙滩悠悠白云
　　等待我们去飘荡

完成了ReflectiveBumpMapping

2007-09-01T08:52:00.000-07:00

写pixel shader时要把normal map里的normal(in tangent space)转换到模型坐标系里才能look up cubemap哦。这需要计算ＴＢＮ矩阵的逆矩阵。绘制茶壶时顶点太多，速度慢得很。原因在调查中。
速度慢的原因查明了哎。我的显卡驱动没更新到最新版本，导致GLSL transpose函数不能使用，自己写了个：
mat3 transpose(mat3 m)
{
mat3 m2;
int i,j;
for( i =0; i<3;i++)
{
for( j = 0;j<3;j++)
{
m2[i][j] = m[j][i]; }
}
return m2;
}
这个函数看上去没什么，简简单单的９次循环嘛。但我猜想是矩阵下标操作比较慢的原因。我更新到最新的显卡驱动，去掉自己写的函数，代以ＧＬＳＬ内置函数，速度就正常啦！

实现environment cube map

2007-09-01T02:27:00.000-07:00

记得在vector of looking up cube map 也是在模型空间的哦。在视空间结果会不对的。

终于实现了bump mapping

2007-08-28T03:40:00.000-07:00

总结一下,希望对大家有帮助：
１.网上有好几种计算ＴＢＮ矩阵的方法和代码，自己去推导费时间，但感觉有些方法算得有问题，要自己去用简单的一些测试用例去测试。
2. 把ＴＮＢ向量用Frag shader显示出来，对程序调度有不少帮助。
3. 记得计算出来的ＴＢＮ向量是在模型坐标系里，在vertex shader里也要把Light vector,View Vector 转换到模型坐标系里，再用ＴＢＮ矩阵转换到tangent space里。

2007-07-22T22:58:00.000-07:00

Write for technician

-make youself clear

there are always some problem with technician.In many people’s eyes,they are’nt good at getting along with others,they are facing mathine almost all the time,talks a few words,lack of the ability of express their idea.

It’s true.it is a bad thing for technician. some times, I think it is pathetic. In the world, people work on theire field,and depend on each other. it is a precise workflow network. if some node have problem,the workflow will be interrupt. it is the same in company. it is so important to express youself,make youself clear,especially for project manager. project manager is a hinge in company,and play an important role in project. project manager have to deal with superiors,salemen,and technicians. if project manager have been a technician,it is not so hard to communicate.but when facing superiors or saleman,it is a different thing. Maybe they don’t have the technical background. it will be hard to communicate if you use technical words. and if they don’t comprehend your idea,you may lose their support .So you have to find some another easy ways to make youself clear,express your great idea.very well. and this is important to get promoted. and I think it is worth you taking a long time to think about it.

2007-06-11T07:58:00.000-07:00

关于走步的话题

假设左脚为中枢脚，仅抬起左脚，放下左脚前出球（传球或投篮）。整个过程中右脚未抬起。这样算走步吗？

在我跟别人打球的过程中，几乎所有人都说这是走步。刚开始我一直跟他们争辩，因为道理很明显，篮球规则里只是说“在传球或投篮中，中枢脚可以抬起，但在球离手前不可以落回地面”，并且很简单的，三步上篮就包含有这个过程啊（三步的最后一步就是这个过程）！但我争不过他们，因为对方说我走步的人多，并且己方的人也不吭声。时间一长，我也怀疑到底是不是走步了。我也只好尽量不这样做。这就是群众的力量啊。真理掌握在多数人手中？真理掌握在一群菜鸟手中。一个网友说：“篮球不发达地区，出门3v3就是找气受。一帮打球的都说我走步，我一步一步数着和他们讲，他们说不出道理，就说我走步”。哈哈！

先来看看篮球规则吧。

第39条带球走规则　　

一、定义　　
- 1、当持活球的队员用同一脚向任何方向踏出一次或数次，另一脚(称为中枢脚)不离开与地面的接触点时出现了旋转。　　
- 2、带球走或持球行进(在场地内)是持球队员一脚或双脚向任何一方向移动超出了本条规则所述的限制。　　
二、确定中枢脚　　
- 1、队员双脚着地接到球，可以用任一脚作中枢脚。一脚抬起的一刹那，另一脚就成为中枢脚。　　
- 2、队员在移动或运球中接到球，他可以按下列情况停步并确定中枢脚：　　
  - (1)如果一脚正接触地面：　　
    - a、双脚同时着地，则任一脚都可以是中枢脚。一脚抬起的一刹那，另一脚就成为中枢脚。　　
    - b、两脚分先后着地，则先触地的脚是中枢脚。　　
    - c、一脚着地，队员可以跳起那只脚并双脚同时着地，则哪只脚都不是中枢脚。　　
三、持球移动　　
- 1、确定了中枢脚后：　　
  - (1)在传球或投篮中，中枢脚可以抬起，但在球离手前不可以落回地面。　　
  - (2)运球开始时，在球离手前中枢脚不可以抬起。　　
- 2、停步后，当哪只脚都不是中枢脚时　　
  - (1)在传球或投篮中，一脚或双脚都可以抬起，但在球离手前不可以落回地面。　　
  - (2)运球开始时，在球离手前哪只脚都不可以抬起。　违反本条规则是违例。
  - 注解　　队员没有控制活球就没有这条规则的违例。

的确，在篮球规则里面找不到一点这是走步的根据。

再看看下面两个图片，你说他们有没有走步？

答案是:没有走步!
第一张我就不用说了，去看篮球规则里的运球规则：“队员用双手同时触球，或使球在一手或两手中停留的瞬间运球即完毕”。
第二张wade双手抱球时左脚已经在空中（右脚单脚着地），再下一步左脚着地，这时着地脚（左脚）就是中枢脚！然后就是我上面一开始提出问题的情形！网上看到有个帖子，有一半人说这是走步，真晕。一群菜鸟。

再看看下面这个帖子：http://www.tianya.cn/New/PublicForum/Content.asp?idArticle=2899&strItem=basketball　
和我提出的问题一样，有多少人说这是走步？3/4吧。有一个还是当了10几年的裁判，有一个是国家二级裁判。不解。
“哎,说什么好呢,这么简单的事情都搞不懂,有人竟然还是二极裁判,可想而知中国裁判的水平有多底啊.这绝对不走步,说走步的请你以后打球时再不要跑三步上篮拉.仔细想想三步上篮的原理你就明白什么是走步什么不是走步拉(说走步的,以后三步上篮都得变成双脚同时跳步上篮拉,哈哈)”。这个网友说得好。哈哈。。。

2007-06-03T08:09:00.000-07:00

武夷山游记

5月的天气应该很炎热,但幸好下小雨,虽然有点湿闷,但至少没了太阳的暴晒...而且风景也是雾朦朦的...很有意境..

双乳峰,呵呵

像不像金刚?

泰坦尼克号

亚马逊河

2007-05-20T09:21:00.000-07:00

后仰跳投分析

刚开始练习的时候总是感觉使不上劲，投出的球三不粘，感觉很别扭。后来在网上查了下资料，边练习边思考，后来明白了后仰是靠腰腹的力量。见下图：

当你身体住后倾斜时，身体上部（腰部以上）的重量会使你有向下倒。要维持平衡，就必须使用腰腹的力量使上身稳住。当投篮时，手指、手腕，前臂发力，施给球一个斜向上的力，同时你也会受到一个方向相反的斜向下的力，而这个力也要用你的腰腹力来平衡。如果你的腰腹力量不足，那么投出的球就会软弱无力，还有可能身体失去平衡。当后跃投篮时，受到的力会使你有向后运动的速度。但投篮时，为了保持命中率，最好保持在静止状态。在你快要投篮时，把腿前甩。根据动量守恒定理，腿前甩的速度会抵消后跃速度，使身体可以保持在大体静止状态。

于是我开始锻炼腹肌。每天晚上做30－60个仰卧起坐，可能的话还做做引体向上。一周后效果显著，投篮不会出现airball了。

本着篮球无界的精神，本文欢迎转载，但须注明作者是原出处。本人在10000多米的高空上花了一个多小时才完成这篇文章…

2007-05-02T19:20:00.000-07:00

秀一下我的爱草和爱机

2007-05-02T08:00:00.000-07:00

难愈的腰伤

一个多月快两个月前打篮球时落下的腰伤到现在还没好，感觉很意外。上次胳膊受伤肿成红薯了也就一个月不到就好了。这是咱回事？

心里咒骂着那撞我腰部的那小子（不知是拿膝盖还是铁肘）。这腰伤虽然平常生活中没感觉，但如果受伤的部位有东西压到的话就到感觉到疼。我希望它能自然痊愈，因为我所有的病都能自己痊愈（除胃病是吃药吃好的）。

难道我真的要贴膏药吗？

在网上搜一下，看到一个网友的腰伤，惊出一身冷汗。

“在一次次的推拿、针灸和理疗过后，仍感觉没有康复的我问医生：这病为什么那么难好？听完我这个问题之后，医生略带讥笑似的跟我说：好？得了这个病就不要想要治好，这种病只能减轻，根本就不可能说恢复到原来正常时的水准。而且不能进行大负荷的运动，不能坐的时间太长，不能站的时间太长，天冷时还要买个护腰，尽量让腰部保持温暖，如果你不能很好的保护好，将来可能会导致你传宗接代出现问题，更严重者甚至大小便不能自理...当时记得我听的差点傻了，脑袋嗡的一声：这不是比杀我还要难受吗？”

http://blog.tom.com/blog/read.php?bloggerid=866716&blogid=59152

我这应该没事，因为快两个月了，不拿东西压它的话根本感觉不到，打篮球不管怎么折腾时也感觉不到，我相信它会会慢慢完全痊愈的。

打球要小心啊，特别要小心陌生人，小伙子们。。。看看麦格雷迪。。。

2007-04-28T07:03:00.000-07:00

我没有那么多时间...

很久以前用朋友的吉它练习，很怀念那段时光啊... 现在，去年，心里一直想买把吉它，继续练习，但一想，我没有那么多时间啊...白天上班，晚上坐在电脑面前，周末还打球，还要...噢，要做的事情太多太多...我的时间不够。

这次出差回来，在回来的路在，在机场等候，来早了2个小时，就拿出笔记本，写完了前面的两篇博客文章。心时感叹，平时总时觉得没时间写东西，其实时间就是一点一点积累起来的。然后在飞机上看发的报纸，看到一篇文章，说的是有关钉子精神这个永恒又古老的话题。里面提到做一件事不必要用连续大段的时间去做，而可以分散利用空余的时间一点点做。很有道理。这样，你就不会觉得，我没那么多时间来做...5.1马上又来临了，我终于下定决心去买一把喜欢的吉它去啦...将来教儿子（女儿）...

2007-04-28T06:46:00.000-07:00

繁衍生命，传递梦想

以前经常思考的一个问题：人生的意义是什么？

也许我做不了惊天动地的大事了，也许我就是一个平凡的人了。这样是不是总觉得很遗憾，是不是觉得人的一生总缺少点什么。等我老去的时候，我还要带着这种遗憾而去吗？

于是我想要孩子了。希望我的孩子能传递我的梦想。我还特别想要个男孩，教他篮球，教他吉它（我现在只会一点哦，不过以后会学好的），教他英语，教他我所知道的一切。

不能没有孩子，他是我的梦想。也许他将来还不足够好，但孩子的孩子呢？谁知道呢？在世界上我也许很渺小，但也是这世界的一员，这世界未来的轨迹会留下我的痕迹。蝴蝶效应，知道吧。看过<<>>吗？踩死远古时代的一只蝴蝶，导致未来发生翻天覆地的变化。一只蝴蝶如此，何况是我呢？

2007-04-28T06:45:00.000-07:00

小心陌生人

和陌生人打篮球你会遇到很多你意想不到的事情。比如受伤。经常，与陌生人打球时，经常会伴随着赌气，不服气，不顺眼等等主观情绪。这种情绪经常会伴随着意外发生。

虽然我已经不再把突破作为第一手段，我更多的是甩掉对方后中远距离投篮。但遇到陌生人，还是难免受伤。

不久以前，和两个从来没见过的陌生人打球，防守时被对方的铁肘撞击胃部，把胃里的东西都撞吐出来了。不过还好，不算严重。晚上睡觉，一躺床上，腰怎么隐隐疼。想起来又是那小子撞的，到现在2个月了吧，还有点疼，终于明白麦迪的小腰受伤意味着什么了。

从此得出一个教训，和陌生人打球，防守时要小心，要警惕啊，和他保持距离，他那么想得分就让他得去吧。少突破，多跳投和后仰跳投，省体力，少受伤，不过会遇到手感的问题，手感不可能一直那么好的哦。

2007-04-21T21:36:00.000-07:00

没有联想,世界会更安静

What will the world come to be without lenovo?

联想公司有句广告词:没有联想,世界会怎样?我只能说:没有联想,世界会更安静.

There is more quiet without lenovo.

最近公司新买了一台联想的笔记本电脑,价格不菲,8300.我的一个同事使用,和我一起出差.风扇的噪音没把他噪死,我离他有几米的距离都被噪死了.

更要命的是无人使用,也不运行任何耗费CPU资源程序的时候,风扇也会频繁启动,发出令人心惊胆战的呼呼声.

我心里只能一个劲骂:联想垃圾.真不知道在中央台做的那么多广告算不算虚假广告.

以前也有朋友使用联想的笔记本,存在莫名其妙的重启动问题.

对联想没好感.远离联想,远离噪音,远离烦恼...

2007-04-12T10:02:00.000-07:00

云水谣

I was been touched deeply by the movie. And after watch the movie,I come to like XuRuoXuan and ChenKun.

美目传情

长途跋涉,见到了朝思暮想的情人,泪水中带着幸福
After a long travel, she found her lover at last,with tear and happiness

泪汪汪的,好让人心疼呀

与其在悬崖展览千年,不如在爱人肩头痛哭一晚

百年润发

If you are fans of XuRuoXuan,you will enjoy the last two picture!

This picture can be used as desktop(1024*768). and it's my desktop now.

2007-04-12T08:52:00.000-07:00

The Flight of Youth

by _Richard Henry Stoddard

There are gains for all our losses.

There are balms for all our pain;

But when youth,the dream,departs

It takes something from our hearts,

And it never comes again.

We are stronger, and are better,

Under manhood’s sterner reign;

Still we feel that something sweet ，

Following youth, with flying feet,

And will never come again.

Something beautiful is vanished,

And we sigh for it in vain;
We behold it everywhere,

On the earth, and in the air,

But it never comes again!

These Things Shall Never Die

--Charles Dickens/查尔斯.狄更斯

The pure.the bright,the beautiful, 一切纯洁的,辉煌的,美丽的,

That stirred our hearts in youth, 强烈地震撼着我们年轻的心灵的,

The impulses to wordless prayer, 推动着我们做无言的祷告的,

The dreams of love and truth; 让我们梦想着爱与真理的;

The longing after something's lost, 在失去后为之感到珍惜的,

The spirit's yearning cry, 使灵魂深切地呼喊着的,

The striving after better hopes- 为了更美好的梦想而奋斗着的-

These things can never die. 这些美好不会消逝。

The timid hand stretched forth to aid 羞怯地伸出援助的手，

A brother in his need, 在你的弟兄需要的时候，

A kindly word in grief's dark hour 伤恸、困难的时候，一句亲切的话

That proves a friend indeed ; 就足以证明朋友的真心；

The plea for mercy softly breathed, 轻声地乞求怜悯，

When justice threatens nigh, 在审判临近的时候，

The sorrow of a contrite heart- 懊悔的心有一种伤感--

These things shall never die. 这些美好不会消逝。

Let nothing pass for every hand 在人间传递温情

Must find some work to do ; 尽你所能地去做；

Lose not a chance to waken love- 别错失去了唤醒爱的良机-----

Be firm,and just ,and true; 为人要坚定，正直，忠诚；

So shall a light that cannot fade 因此上方照耀着你的那道光芒

Beam on thee from on high. 就不会消失。

And angel voices say to thee---你将听到天使的声音在说-----

These things shall never die. 这些美好不会消逝。

The Rainy Day

-Henry Wadsworth Longfellow 亨利.沃兹渥斯.朗费罗

The day is cold,and dark,and dreary;
It rains,and the wind is never weary;
The vine still clings to the moldering wall,
But at every gust the dead leaves fall,
And the day is dark and dreary.
My life is cold and dark and dreary;
It rains and the wind is never weary;
My though still cling to the moldering past,
But the hopes of youth fall thick in the blast,
And the days are dark and dreary.
Be still,sad heart!And cease repining;
Behind the clouds is the sun still shining;
Thy fate is the common fate of all,
Into each life some rain must fall,
Some days must be dark and dreary.

天冷、阴暗、沉闷；
下着雨，风也刮个不停；
藤还攀附着颓垣残壁，
每来一阵狂风，枯叶附落纷纷，
天真是阴暗而沉闷。
我的生活寒冷、阴郁、沉闷；
下着雨，风也刮个不停；
我的思想还纠缠着消逝的往事，
大风里，我的青春希望相继熄灭，
天真是阴暗而沉闷。
安静吧，忧伤的心！别再悔恨；
乌云后面太阳依然辉煌灿烂；
你命运和大家的一样，
每个人一生都得逢上阴雨，
有些日子必然阴暗而沉闷。

2007-04-10T01:13:00.000-07:00

My Life,Backwater

How many years I don't have passion for success.
Life is a pool of peace water.no wind.nothing drop into it.
working hard,promotion,can't give me what I need,can't excite me.Maybe I am not easy to satisfy.
Working,buying house,getting marriage,getting a baby is my whole life.
I am a little bit sick of it.
I am older and older,day an day.I am not young any more.

Switchfoot - This Is Your Life

Yesterday is a wrinkle on your forehead
Yesterday is a promise that you've broken
Don't close your eyes
Don't close your eyes
This is your life and today is all you've got now
And today is all you'll ever have
Don't close your eyes
Don't close your eyes
This is your life
Are you who you want to be
This is your life
Are you who you want to be
This is your life
Is it everything you've dreamed it would be
When the world was younger
and you had everything to lose

Yesterday is a kid in the corner
Yesterday is dead and over

This is your life
Are you who you want to be
This is your life
Are you who you want to be
This is your life
Is everything you've dreamed it would be
When the world was younger
and you had everything to lose

Don't close your eyes
Don't close your eyes
Don't close your eyes
Don't close your eyes
This is your life
Are you who you want to be
This is your life
Are you who you want to be
This is your life
Are you who you want to be
This is your life
Are you who you want to be
This is your life
Is everything you've dreamed it would be
When the world was younger
and you had everything to lose
You had everything to lose

END

2007-04-03T09:36:00.000-07:00

The Butterfly Effect

In a chaotic system, the ability of miniscule changes in initial conditions (such as the flap of a butterfly's wings) to have far-reaching, large-scale effects on the development of the system(such as the course of weather a continent away)

The phrase refers to the idea that a butterfly's wings might create tiny changes in the atmosphere that ultimately cause a tornado to appear

"the butterfly effect" reveal a fact to us:don't ignore the tiny things because they may effect you deeply.I tell a story today to prove the butterfly effect.

I have a little brother.when he was a little child, my parent very loved him,even indulged him. I give a example here. first I explain,we all are son of soil. collecting firewood is a responsibility for a child of farmer. my little brother was given the responsibility of course. but one day, he get back home with ONE bush branch as collecting firewood! What a joke! It never happen before.no children did this before. but my parent obviously too love him,and they thought that is original! And praise him instead of blaming him.

At last ,he didn't finish his elementary course. he was effected by my parent's praise obviously. Maybe he thought quitting elementary is original!

This is a good example for "the butterfly effect"...

2007-03-27T09:47:00.000-07:00

when I grown up

when I am a child , I wondered what's the mountain behind,and trip a lot around my home. And the scene that I feel like ordinary today shocked my heart.
when I got in a junior high school,I left my home, to a beautiful place. It was located on a foot of a mountain. The mountain is full of tree. And our dorm is on the middle of the mountain . There is a river in front of school. After class,we gone along the river with ours clothes in package to a aqueduct that is cross over the river.The place where the aqueduct got through is beautiful also. It was full of pine trees.There was a ruin of old house. The sunshine got through the pine tree. We took off our clothes,jump in the water of aqueduct.We swim here! we took the swim as shower.Oh,It is the one of best memory I have.
when I grown up,I traveled a lot of famous places.But none of them have left deep memory in my brain. Why? I think the time make me in torpor.Time flies! the fleeing time! No one can fight again time! The time will rubdown you edge.

I do like the picture that remind me my childhood. I don't mean her ,just the place around her and the what she did.Do you have the same feeling as I? If you have ,then we have some thing in common.

时光-许魏
在阳光温暖的春天
走在这城市的人群中
在不知不觉的一瞬间
又想起你
你是记忆中最美的春天
是我难以再回去的昨天
你像鲜花那样地绽放
让我心动

在阳光温暖的春天
走在这城市的人群中
在不知不觉的一瞬间
又想起你
也许就在这一瞬间
你的笑容一人如晚霞般
在川流不息的时光中
神采飞扬