通知:E拓建筑网正式更名为拓筑在线!

拓筑在线

 找回密码
 快速注册

QQ登录

只需一步,快速开始

微信登录

微信扫一扫,快速登录

GH中数据选取的语法规则变更(DataTree selection rules)


[版块:参数化设计] [分类:经验教程] [复制链接] 报告无效帖子查看: 2884|回复: 1   
拓邑团练|zdjdevil 发表于 2014-8-13 14:53:32 | 显示全部楼层
发帖得20e币  e币充值  开通VIP会员  快速免费获取e币
今天在处理一组树状数据结构的时候用到split tree这个电池,发现原先的masks的语法规则发生了变化,之前例如我需要提取前6个branches,需要写0-6即可,但是今天一直出错,上网一搜才发现在0.9版本后数据选取的规则发生了变化,现在需要写成0 to 6。为了方便大家之后在其他地方产生疑惑的查询,将作者David Rutten解释帖引用并提供链接,很简单的内容就不翻译了哈。顺带说一句,其实基本上对于树状结构的处理都可以通过Param Viewer转换成List的问题再用Tree Branch转回,但是既然都有这些直接处理树状结构的命令,还是应该多多挖掘其中的强大,例如下面内容会提到的类似编程语言的?和!的用法,会在某些时候给你带来意想不到的便捷。(单位没法上传图片就没法一一截图了,大家探索愉快!)
From David Rutten:

Imagine we have the following data tree, containing a bunch of textual characters:

[size=1em]{0;0} = [a,e,i,o,u,y]
{0;1} = [ä,ë,ê,ï,î,ö,ô,õ,ü,û,ÿ,y]
{1;0} = [b,c,d,f,g,h,j,k,l,m,n,p,q,r,s,t,v,w,x,z]
{1;1} = [ç,ĉ,č,ĝ,ř,š,ş,ž]

There are a total of four branches {0;0}, {0;1}, {1;0} and {1;1}. The first branch contains all the vowels that are part of the standard English alphabet. The second branch contains all non-standard vowels and branches three and four contain the standard and non-standard consonants respectively.


So what if we want to select from this tree only the standard vowels? Basically include everything in the first branch and disregard everything else. We can use the [Tree Split] component with a selection rule to achieve this:

[size=1em]{0;0}

This selection rule hard-codes the number zero in both tree path locations. It doesn't define an item index rule, so all items in {0;0} will be selected.


If we want all the vowels (both standard and non-standard), then we have several options:

[size=1em]{0;?}         = select all branches that start with 0
[size=1em]{0;(0,1)}    = select all branches that start with 0 and end in either 0 or 1
[size=1em]{0;(0 to 1)} =    ......................................... and end in the range 0 to 1.

Conversely, selecting all standard vowels and consonants while disregarding all non-standard character can be achieved with rules as follows:

[size=1em]{?;0}
[size=1em]{(0,1);0}
[size=1em]{(0 to 1);0}

It is also possible to select items from each branch in addition to limiting the selection to specific branches. In this case another rule stated in square brackets needs to be appended:

[size=1em]{0;?}[0 to 2]

The above rule will select the first three vowels from the standard and the non-standard lists.


Basically, rules work in a very consistent way, but there are some syntax conventions you need to know. The first thing to realize is that every individual piece of data in a data-tree can be uniquely and unambiguously identified by a collection of integers. One integer describes its index within the branch and the others are used to identify the branch within the tree. As a result a rule for selection items always looks the same:

[size=1em]{A;B;C;...;Z}              where A, B, C, Z and i represent rules.

It's very similar to the Path Mapper syntax except it uses square brackets instead of parenthesis for the index (the Path Mapper will follow suit soon, but that won't be a breaking change). You always have to define the path selector rule in between curly brackets. You can supply any number of rules as long as you separate them with semi-colons.

The index rule is optional, but -when provided- it has to be encased in square brackets after the path selection rule(s).


The following rule notations are allowed:

[size=1em]*  Any number of integers in a path

[size=1em]?  Any single integer

[size=1em]6  Any specific integer

[size=1em]!6  Anything except a specific integer

[size=1em](2,6,7)  Any one of the specific integers in this group.

[size=1em]!(2,6,7)  Anything except one of the integers in this group.

[size=1em](2 to 20)  Any integer in this range (including both 2 and 20).

[size=1em]!(2 to 20) Any integer outside this range.

[size=1em](0,2,...)  Any integer part of this infinite sequence. Sequences have to be at least two integers long, and every subsequent integer has to be bigger than the previous one (sorry, that may be a temporary limitation, don't know yet).

[size=1em](0,2,...,48)  Any integer part of this finite sequence. You can optionally provide a single sequence limit after the three dots.

[size=1em]!(3,5,...)  Any integer not part of this infinite sequence. The sequence doesn't extend to the left, only towards the right. So this rule would select the numbers 0, 1, 2, 4, 6, 8, 10, 12 and all remaining even numbers.

[size=1em]!(7,10,21,...,425)  Any integer not part of this finite sequence.

Furthermore, it is possible to combine two or more rules using the boolean and/or operators. If you want to select the first five items in every list of a datatree and also the items 7, 12 and 42, then the selection rule would look as follows:

[size=1em]{*}[(0 to 4) or (6,11,41)]

The asterisk allows you to include all branches, no matter what their paths looks like.


It is at present not possible to use the parenthesis to define rule precedence, rules are always evaluated from left to right. It is at present also not possible to use negative integers to identify items from the end of a list.


原始链接http://www.grasshopper3d.com/for ... ree-selection-rules





评分

参与人数 1e币 +5 收起 理由
DanielJin + 5 爆料兼分享,分享总让我们知更多。

查看全部评分

拓邦元帅|沧月 发表于 2014-8-13 19:41:15 | 显示全部楼层
发帖得20e币  e币充值  开通VIP会员  快速免费获取e币
相关的变更还有表达式的写法
您需要登录后才可以回帖 登录 | 快速注册 微信登录

[英国版]Wallpaper 设计业权威杂志 2025年08期
[英国版]Wallpaper 设计业权威杂志 2025年08期
2025年精选30种国外【建筑+景观+室内】设计杂志超大合集 全年订阅链接:https://www.eeeetop.com/forum.php?mod=viewthread&tid=75981
  深圳老梁  深圳老梁最后回复于 2025-07-12 艺术设计

[美国版]Dwell 现代世界之家 2025年07-08期
[美国版]Dwell 现代世界之家 2025年07-08期
2025年精选30种国外【建筑+景观+室内】设计杂志超大合集 全年订阅链接:https://www.eeeetop.com/forum.php?mod=viewthread&tid=75981
  深圳老梁  深圳老梁最后回复于 2025-07-12 建筑景观

[美国版]Architectural Digest US 建筑辑要 2025年07期
[美国版]Architectural Digest US 建筑辑要 2025年07期
2025年精选30种国外【建筑+景观+室内】设计杂志超大合集 全年订阅链接:https://www.eeeetop.com/forum.php?mod=viewthread&tid=75981
  深圳老梁  深圳老梁最后回复于 2025-07-12 室内家居

[日本版]Casa Brutus 建筑室内艺术杂志 2025年07期
[日本版]Casa Brutus 建筑室内艺术杂志 2025年07期
2025年精选30种国外【建筑+景观+室内】设计杂志超大合集 全年订阅链接:https://www.eeeetop.com/forum.php?mod=viewthread&tid=75981
  深圳老梁  深圳老梁最后回复于 2025-07-12 室内家居

[意大利版]Interni 著名室内设计杂志 2025年07-08期
[意大利版]Interni 著名室内设计杂志 2025年07-08期
2025年精选30种国外【建筑+景观+室内】设计杂志超大合集 全年订阅链接:https://www.eeeetop.com/forum.php?mod=viewthread&tid=75981
  深圳老梁  深圳老梁最后回复于 2025-07-12 室内家居

[意大利版]Domus 高端建筑室内杂志 2025年07期
[意大利版]Domus 高端建筑室内杂志 2025年07期
2025年精选30种国外【建筑+景观+室内】设计杂志超大合集 全年订阅链接:https://www.eeeetop.com/forum.php?mod=viewthread&tid=75981
  深圳老梁  深圳老梁最后回复于 2025-07-12 室内家居

[日本版]Shotenkenchiku 商店建筑 2025年07期
[日本版]Shotenkenchiku 商店建筑 2025年07期
2025年精选30种国外【建筑+景观+室内】设计杂志超大合集 全年订阅链接:https://www.eeeetop.com/forum.php?mod=viewthread&tid=75981
  深圳老梁  深圳老梁最后回复于 2025-07-12 建筑景观

[澳大利亚版]Architecture Australia 澳大利亚建筑 2025年07-08期
[澳大利亚版]Architecture Australia 澳大利亚建筑 2025年07-08
2025年精选30种国外【建筑+景观+室内】设计杂志超大合集 全年订阅链接:https://www.eeeetop.com/forum.php?mod=viewthread&tid=75981
  深圳老梁  深圳老梁最后回复于 2025-07-12 建筑景观

[英国版]Landscape & Urban Design 景观与城市设计 2025年07-08期
[英国版]Landscape & Urban Design 景观与城市设计 2025年07-08
2025年精选30种国外【建筑+景观+室内】设计杂志超大合集 全年订阅链接:https://www.eeeetop.com/forum.php?mod=viewthread&tid=75981
  深圳老梁  深圳老梁最后回复于 2025-07-12 建筑景观

[日本版]Confort 建筑室内杂志 2025年07-08期
[日本版]Confort 建筑室内杂志 2025年07-08期
2025年精选30种国外【建筑+景观+室内】设计杂志超大合集 全年订阅链接:https://www.eeeetop.com/forum.php?mod=viewthread&tid=75981
  深圳老梁  深圳老梁最后回复于 2025-07-12 建筑景观

[新西兰版]Architecture NZ 建筑学 2025年07-08期
[新西兰版]Architecture NZ 建筑学 2025年07-08期
2025年精选30种国外【建筑+景观+室内】设计杂志超大合集 全年订阅链接:https://www.eeeetop.com/forum.php?mod=viewthread&tid=75981
  深圳老梁  深圳老梁最后回复于 2025-07-12 建筑景观

[英国版]Archetech 建筑技艺 2025年07-08期
[英国版]Archetech 建筑技艺 2025年07-08期
2025年精选30种国外【建筑+景观+室内】设计杂志超大合集 全年订阅链接:https://www.eeeetop.com/forum.php?mod=viewthread&tid=75981
  深圳老梁  深圳老梁最后回复于 2025-07-12 建筑景观

拿来吧你!一键生成无缝贴图神器!自制PBR材质!
拿来吧你!一键生成无缝贴图神器!自制PBR材质!
▲使用无缝贴图的彩总你是否有p图时贴图拼接生硬的烦恼,是否有建模渲染时找不到充满细节的pbr材质的痛苦呢?这个神器解决你的问题! PixPlant3一款专业的
  sadapple  h3R3最后回复于 2025-07-11 图形化处理

重庆沙坪坝西永 中骏·西著七里 现代风格高层 SU模型(含图)
重庆沙坪坝西永 中骏·西著七里 现代风格高层 SU模型(含图)
本资料除了SKP模型,还含有SU导图、效果图、渲染小样等图片,有很好的学习参考价值。百度网盘下载链接(收集于网络,仅供学习交流,侵删): [
  夏至2021  zhb123最后回复于 2025-07-11 SketchUp模型

建筑师如何甩出一份让老板满足的PPT(162页,免费领取)
建筑师如何甩出一份让老板满足的PPT(162页,免费领取)
建筑师如何甩出一份让老板满足的PPT(162页,免费领取) 非常不错的一份资料哦,希望对大家有帮助! 百度网盘下载链接
  小迷妹建筑梦  jianzhu2012最后回复于 2025-07-11 建筑师讨论区

话说今年的一注成绩啥时候出哟
话说今年的一注成绩啥时候出哟
有没有懂行的,啥时候出成绩嘞!
  恩赐,解脱!  恩赐,解脱!最后回复于 2025-07-10 建筑师讨论区

Enscape 2.3-3.1 都有 推荐3.1
Enscape 2.3-3.1 都有 推荐3.1
更新一波资源 百度网盘下载链接: **** 本内容被作者隐藏 ****
  sadapple  BOBO我爱你1992最后回复于 2025-07-10 虚拟化表现

分享一张比较清晰的中国建筑气候区划图
分享一张比较清晰的中国建筑气候区划图
之前在网上找到的,做PPT时经常会用到
  1018807342  1018807342最后回复于 2025-07-10 参考素材

官方综合交流QQ群(更多):

240721746

拓筑在线——面向建筑师群体的

设计交流论坛、软件学习社区、资料下载网站及企业服务平台!

微信扫一扫关注我们

微信公众号

拓筑小助手

GMT+8, 2025-7-13 17:29 , Processed in 0.073445 second(s), 17 queries , Gzip On, MemCached On.    拓筑在线 ( 粤ICP备11043922号 )

Powered by Discuz! X3.4  © 2011-2023 拓筑在线

快速回复 返回顶部 返回列表