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                關于make2d,6.0以來已經優化了很多,速度提升了十倍,精度也好很多,網格也可以make2d,大部分結果不理想都是建模習慣的問題,之前官方自己就有過相關的解釋,教你如何得到更好的效果,咱們就給大家搬運一下: # How to Get Make2D to Perform Better 如何獲得更好的make2d效果: **Make2D**?is one of Rhino's weaker spots, but it is still an essential function for many people. Following are some bits of advice distilled from various discussions among the?*Pros*?on the Rhino newsgroup. make2d是rhino的弱點之一。但是對于用戶仍然是很必要的一個功能。跟著下面的從各種rhino用戶之間總結匯總的建議意見來操作會好很多。 * **Make2D**?doesn't work with objects behind the camera – so make sure there are none selected for your scene. For views where the camera is inside the model, you may need to draw a plane that represents the camera location, split the model there, and delete/hide everything behind the camera. * make2d并不會計算攝像機背后的物體,所以請確保隱藏攝像機后的物體來節約計算時間。至于那種攝像機在物體內部的視角,你可能需要畫一個面來表示攝像機的位置,然后用面分割物體,把攝像機背后的物體隱藏,這樣的話效果會好很多。(F6打開攝像機) * **Hide**?all objects that are already completely hidden behind others in the scene. One easy way to do this is to use?**SelVisible**?on your scene, then?**Invert**?the selection. Everything that selects can be hidden. * 隱藏場景中完全被其他物件遮擋的,看不到的物體來減少計算時間。一個很簡單的方法是使用selVisible命令來選取所有可見的物件,然后invert反選,就可以隱藏所有不可見的物件了,看不見你make2d它干嘛,不是浪費時間么,除非你要隱藏線。 * **Hide**?(or simplify) objects with a lot of detail that will be tiny in the Make2D (for example screw threads). No need to calculate all those intersections and projections for something that will end up only being a few pixels in the final drawing. * 隱藏或者簡化有很多細節但是在成圖中根本看不清楚的細節,比如螺紋。不惜要去計算這些最終只占成圖幾個像素的相交或者投影,浪費時間。 * **Join**?all?**surfaces**?into polysurfaces as much as possible. Everywhere surface edges are concurrent, Rhino has to calculate two edges instead of one. See if there are overlaps. * 盡可能組合所有的曲面成多重曲面,所有邊緣重合的曲面,rhino都會計算兩遍而如果是多重曲面,rhino就只會計算一遍。 * **Hide**?all?**curves**?if possible. They take longer to calculate. This is especially true with curves that are concurrent with surface edges. These are redundant anyway, so hide or delete them. * 如果可以的話,隱藏所有的曲線,曲線的計算費時更久,尤其是這些曲線和曲面邊緣重疊的時候,反正是重疊了,所以隱藏或者刪除了最好。 * Check for bad objects (**SelBadObjects**) and fix if necessary! * 檢查是否有壞面,使用selbadobjects命令, 這個也會影響make2d的結果。 * If possible, ensure that the geometry included in the Make2D stays inside (does not touch) the view border at all. (This might be impossible for interiors.) * 如果可能的話,確保物體在make2d的時候在視窗內,而不是和視窗相交,準確說就是和攝像機相交,如果攝像機和物體相交的話,透視角度過大有時候就會出現make2d的問題,親身經歷,相同的角度,不同的透視角度出來的結果是不一樣的,軸測效果最好。不過這一點對于室內設計····是不可能的。 * Lowering the?**absolute unit tolerance**?by an order of magnitude (for example from .001 to .01) helps tremendously. Just remember that your resulting Make2D drawing will not be any more accurate than that. Also don't forget to set it back to the original tolerance later. For a discussion of what tolerances do in Rhino see?[Understanding Tolerances](https://wiki.mcneel.com/rhino/faqtolerances "rhino:faqtolerances"). * 可以嘗試把絕對公差降低一個數量級,比如我習慣使用m單位,絕對公差0.0001,那我在make2d的時候可以把絕對公差改成0.001再make2d,這樣速度會快很多,make2d的精度不會比這個再低了。只是切記,切記,切記,之后一定要把絕對公差調回去。至于為啥,可以看一下我這個帖子:[十一大高效的Rhino建模習慣](https://mp.weixin.qq.com/s/tIhymmQxetXTwHTCCoetcQ)。 And…?**your system also makes a difference**. 并且,不同的操作系統,結果也可能有不同。 * A 64-bit system with as much RAM as you can manage and a multi-core processor will allow you to do a Make2D working in the background. In any case, for a large Make2D I would export the scene to a new file specific for the Make2D and do all the operations suggested on this page in the new file. * 內存越大的六十四位并且是多核的系統將會允許你在后臺運行make2d,任何時候要進行一個大場景的make2d的時候,我都會單獨導出一個文件用來make2d,然后檢查一下上面所說的所有問題。 Compiled by Mitch 8.02.09 完成于8.02.09 by Mitch 再舉個例子吧,研習班的一位同學有個模型,等距斷面線做了紋理,想要make2d,但是出來的結果非常不理想。 ![](http://www.rhinostudio.cn/files/course/2019/11-22/134158653dfa299135.png) ![](http://www.rhinostudio.cn/files/course/2019/11-22/134205dc810f144849.png) 那我們可以看到線斷斷續續,很不好,一來呢,是他使用的rhino版本比較低,我使用最新版本的rhino6.0sr20之后,然后發現,效果好了不少,但是仍然不理想: ![](http://www.rhinostudio.cn/files/course/2019/11-22/134406658291121960.png) 這個主要就是因為曲面比較復雜,線和曲面重復在一起,rhino無法判斷線在內部還是面外部,出現了誤差,所以才make2d出了錯誤,這樣的情況也是我們要盡量避免的,也就是避免線和面重疊,所以咋辦?那這時候要是沒有必須使用矢量圖的要求,那就直接視窗截圖,如果一定要矢量線稿,那就只能動用最后手段,用線或者面去分割對象,把面分隔開,有了曲面邊緣之后再去make2d: ![](http://www.rhinostudio.cn/files/course/2019/11-22/1346124095e6698484.png) 那你可以看到就一點問題都沒有了,缺點就是比較卡,所以建議復制一份文件單獨來做這個make2d。 ps:補充,另外還請注意,模型別離原點太原,這也會導出make2d的結果有問題。
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