maya建模教程:汽车坐椅

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Create Top Seat Upholstery

Note : to continue your work and to get more modeling concentration, you could use working by layer or hide your finished model. :)

注意 : 继续你的工作前，你可以使用 Layer 来隐藏你已完成的物体 .

From Side view, create a profile curve like in this image (pic 22), and then from top view, create a NURBS circle with 18 sections and adjust the CV's until the circle looks like in this image (pic 23). Remember... the distances between CV curves are important; try to maintain the same distances, 'cause the distance between the CV's affects the smoothness of the final lofted objects . :)

侧视窗 , 创建一条参考曲线如 (pic 22), 然后切换到顶视窗 , 创建一条 NURBS 圆形曲线 (sections 18) 然后调整它的 CV 点到像 (pic 23) 所示 . 记住 .... 尽量使每个 CV 点之间的距离一样， 因为这会影响到最后 loft 出来物体的效果 .

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Then from side view, duplicate this curve many times following the profile curve (pic 24). Adjust every CV's curve, especially the top and bottom curves, it should be turned into lane curve or circle curve (pic 25).

回到侧视窗，复制一些曲线如 (pic 24) ，并且调整每条曲线的 CV 点，得到 (pic 25) 的效果为止 .

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Now hide profile curves and select all the curves one by one sequentially (from top to bottom or reverse) then surface > loft . You will have this new lofted object (pic 26). Next, from side view create a cutter curve reference (pic 27).

隐藏参考线，再依次选择这些曲线，并使用 surface > loft 命令 . 得到新物体如 (pic 26). 回到侧视窗中去，创建一条如 (pic 27) 所示的剪切曲线 .

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pic 27

With cutter curve still selected and still from side view, shift select main object, then Edit NURBS > Project Curve on Surface . You will have this cutter spline area (pic 28); next, select main object Edit NURBS > Trim and select these 2 front objects (pic 29).

在剪切曲线仍然被选择时，按住 Shift 键选择主物体 , 在侧视窗中使用 Edit NURBS > Project Curve on Surface . 你将在曲面上得到剪切曲线 (pic 28); 选择你要保留的区域，并 Edit NURBS > Trim (pic 29).

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Hit enter, then you'll have these 2 objects (pic 30). With these new objects still selected, press Ctrl-D (duplicate) and move these new objects to the front (about 1 of z axis)

剪切后得到 (pic 30). 当前物体仍然被选择的时候，按快捷键 CTRL+D( 复制 ) 它并将复制后的曲面在 z 轴方向上移动约 1 的单位 .(pic 31)

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Now select back your trimmed object and go to the menu Edit NURBS > Untrim Surfaces (pic 32), select trim again, and this time, select the main object (pic 33).

选择后方被你剪切过的曲面，使用 Edit NURBS > Untrim Surfaces 命令，得到 (pic 32), 将得到的曲面再次 trim 它，这次，我们要保留的区域改变了 (pic 33)

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pic 33