maya nurbs 汽车坐椅建模英文教程
本教程向大家介绍maya nurbs 汽车坐椅建模的过程，教程很经典，制作起来难度也不大，希望教程对朋友们有所帮助！
翻译说明： 为了让大家更能理解这个教程，我并不翻译其中一些命令，这样可以让一些初学者 ( 不是很熟悉 maya nurbs 建模命令 ) 更快找到这些命令。另：我的英文不好，所以在翻译的时候会有一些不足之处，如果有让你发笑的地方，请你给我提醒，我将更改过来 , 我的 email: chinacache@163.com.
希望可以和大家一同进步！
rendered using maya 7.0 (software render)
create seat gear rotater
from front view, create a beveled gear profile (pic 1) and bevel plusit (width 0.5, depth 0.5, extrude depth 1.5 and outer style curve convex out) (pic 2).
在前视窗中创建齿轮的轮廓曲线 (pic 1) 并用 bevel plus 它 ,bevel 的取值 (width 0.5(width 0.5, depth 0.5, extrude depth 1.5 和 outer style curve convex out)(pic 2).
pic 1
pic 2
next, create another profile curve (pic 3) and bevel plus it (width 0.1, depth 0.1, extrude depth 0.2 and outer style curve concave in) (pic4)
接下来，创建另一条曲线 (pic 3) 并 bevel plus 它，取值如下 (width 0.1, depth 0.1, extrude depth 0.2 and outer style curve concave in) (pic 4).
pic 3
pic 4
create a nurbs cylinder (6 spans), rotate to 90° and rescale it smaller and drag to the center of the bottom right circle corner (pic 5). from side view, tweak the right-end cv's and rescale them smaller (very small until it looks like they are touching each other) (pic6).
youcould use front view zoom to check it, and then adjust 2 more right cv's and drag to the left, until it looks like this image (pic 7), and then duplicate this cylinder and hide the new one (copied) , errh what is this ? duplicate ?... you will know later :)
创建一个 nurbs 圆柱体 (spans 为 6), 旋转 90 度 , 并将它缩小移动到如 (fig 5) 所示，切换到侧视窗， 拉伸最右排的 cv 点并将其缩到看上去合成一点为止 .(pic 6) 你可以切换到前视窗当中放大来检查它，接着调整最右边的两排 cv 点 ( 包含我们所缩小的那一排 ) ，并将它们向左移动到如 (pic 7) 所示 , 调整好后复制这个曲面，并将复制出来的曲面隐藏起来，为什么 ? 向下看你就会明白的 ...
pic 5
pic 6
pic 7
now drag the cylinder to the center of the beveled curves (pic 8), nowselectyour beveled surface,selectyour cylinder, then fillet circular it with value of around 0.056 (reverse direction) and then trimit, you will have this cute half hole (pic 9).
将圆柱体移动到 bevel 的曲线中心 (pic 8), 现在 -- 选择你 bevel 出来的曲面 , 按 shift 键选择圆柱体，然后 circular fillet 它们， circular fillet 取值约为 0.056, 完成后对它们分别 trim,我们可以得到如 (pic 9).
remember the one cylinder that we hid before ? unhide it, rotate it to 180 of y axis, rescale it smaller a little bit, and place it in the center of this new half hole (pic 10).
你是否记得我们隐藏的那个曲面 ? 显示它，在 y 轴方向上旋转 180 度 , 将它缩小一点，并将它移动到中心如 (pic 10)
pic 8
pic 9
pic 10
do the same with the bottom left circle corner (pic 11).
左边的齿轮用同样的的方法做出 (pic 11)
pic 11
选择你所有的物体，进入到全局渲染里，设置 nurbs tessellation , 将 curvature tolerance 高为更高组另， u 和 v 取到 5000, 然后 set and close 并渲染它，这样我们得到如 (pic 12) 的物体 .
pic 12
wheee...everything is so easy and so smooth with maya isn't it ?, but oops...this is just part 1. :(
note : you could put logo thereordo whatever you want, more detailorsomething... :)
喔 ....maya 是否很简单 ? 不要急，以上只是第一节 :(
注意 : 你可以在这里放上你喜欢的标记 , 或者刻画更多的细节 .... :)
nowselectall these objects, group them and name the group "rotator", and then save this file as "rotator_gear.mb"ordo whatever you like with the file name. :)
现在选择你所有的物体，并将它们成组，将组命名为 "rotator", 并存储文件为 "rototor_gearmb"( 也可以是你想用的名字 )
create bottom seat upholstery
制作椅子的扶手
from side view, create 2 profile curves like in this image (pic 13), then from front view, create a nurbs circle with 18 sections, rotate it 90°, then adjust the cv's with the scale and move tools until it looks like in this image (pic 14).
在侧视窗，创建两条轮廓曲线 (pic 13), 回到前视窗，再创建一条 nurbs 圆形曲线 (section 18), 旋转 90 度，然后调整它的各 cv 点到像 (pic 14) 所示 .
pic 13
pic 14
here's the perspective view
这是透视图
then duplicate this curve and rescale it (y axis), move it many times(following the shape of the profile curve) until it looks like this (pic 14). note : you must rescale the start and end curves very small (pic 15).
然后复制一些曲线并在 y 轴方向上放大或缩小它们，调整到如 (pic 14). 记住 : 最开始和结束的曲线你要尽量将其缩到最小 .(pic 15)
pic 14
pic 15
thenselectthese 3 curves (pic 16),selecta couple of the top cv's and then move them to the left a little bit and rotate them also to the left (pic 17).
选择这 3 条曲线 (pic 16), 将它们的一些 cv 点向左移动并消微放大一点 (pic 17).
pic 16
pic 17
nowselectall these curves from start to end (not the profile) and then surface loft . you will have this new object (pic 18), now duplicate mirror this new object with the parameters shown here (pic 19).
note : the translate value could be different, but scale -1 is a must for mirror duplicate :)
现在依此选择这些曲线（不含那条轮廓线 ) 然后 surface loft . 你将得到一个曲面如 (pic 18), 接着以镜像的方式复制这个物体，复制的选项请看 (pic 19).
注意 : 移动 (translate) 的数值可以有所不同，但是拉伸 (scale) 的数值为 -1 时表示以镜像的方式复制 .
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