1. Vertex a is the initial vertex and b is the terminal vertext.
a顶点是始端顶点,而b是末端顶点。

-- 来源 -- 英汉 - 辞典例句

2. 3D applications make use of many idioms such as drag handles and vertex handles that have been adapted from 2D to 3D. However, there are some special issues surrounding 3D input. Drag thresholds
三维应用程序采用的许多习惯用法,例如,拖动操作点和顶点操作点是从二维应用中转化而来的,但是在三维输入中还存在一些特殊的问题。

-- 来源 -- About Face 3交互设计精髓

3. If the last vertex is identical to the first vertex, it is a closed form and the polyline forms a polygon.
如果最后的顶点与最初的顶点重合,它就是闭合的,也就形成了一个多边形。

-- 来源 -- About Face 3交互设计精髓

4. If you right-click on the freeform object and choose Edit Points from the context menu, the bounding rectangle disappears and vertex handles appear instead.
如果随意右击图像并在背景菜单中选择编辑顶点,这个矩形外框就会消失,由顶点操作点取而代之。

-- 来源 -- About Face 3交互设计精髓

5. When the object is selected, the program, rather than placing eight handles as it does on a rectangle, places one handle on top of every vertex of the polyline.
这样的对象在选中时,程序不是像在矩形图那样设置8个操作点,而是在折线形的每个顶点上设置一个操作点。

-- 来源 -- About Face 3交互设计精髓

6. Like a vertex of a polyline, it expresses a point on the object, but it also expresses the shape of the curve at the point.
和折线上的定点类似,它也表示对象上的点,不过这里表示的曲线上的点。

-- 来源 -- About Face 3交互设计精髓

7. A star is defined as the set of edges incident to a vertex.
一个星形定义为关联于某个顶点的边的集合。

-- 来源 -- 英汉 - 辞典例句

8. There is a very powerful and useful variant of the resize handle: a vertex handle.
其实,还有一种功能强大的调整大小操作点变体,即顶点控制柄。

-- 来源 -- About Face 3交互设计精髓

9. Figure 19-12: These are vertex handles, so named because there is one handle for each vertex of the polygon.
图19-14 图中所示为定点控制柄,之所以如此命名,是因为多边形的每个定点上都有一个这样的控制柄。

-- 来源 -- About Face 3交互设计精髓

10. A user can then drag any vertex of the polyline independently and actually change one small aspect of the object’s internal shape rather than affecting it as a whole. This is shown in Figure 19-12.
用户可以独立地拖动任何一个顶点,局部改变对象内部形状。 而不会在总体上影响对象,如图19-14所示。

-- 来源 -- About Face 3交互设计精髓