Tutorial 2.1: Welding

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As you learned in the Quick Start tutorials, Moho features an Auto Weld feature  that automatically welds shapes and segments together when your cursor reaches  a point that you can weld to. However, there are cases where you may want to  manually weld points together. 

When drawing in Moho’s vector layers, the concept of “welding” points is very  important. These tutorials will show you examples of how (and why) points can be  welded, and will go on to show you some examples of good and bad welds you  can do in Moho. 

When you weld two points together in Moho, Moho really is combining those  two points into one. There are a couple reasons to do this: First, welding the two  endpoints of a curve together creates a closed curve. Second, if two shapes join  up at a particular point, and you want them to remain joined during an animation,  then welding those points together will guarantee that those two shapes will remain  joined.

正如您在快速入门教程中所了解的，Moho 具有自动焊接功能，当您的光标到达您可以焊接的点时，该功能会自动将形状和线段焊接在一起。 但是，在某些情况下，您可能希望手动将点焊接在一起。

在绘制莫霍面的矢量图层时，“焊接”点的概念非常重要。 这些教程将向您展示如何（以及为什么）焊接点的示例，并将继续向您展示您可以在 Moho 中进行的良好和不良焊接的一些示例。

当您在 Moho 中将两个点焊接在一起时，Moho 确实将这两个点合二为一。 这样做有几个原因：首先，将曲线的两个端点焊接在一起会创建一条闭合曲线。 其次，如果两个形状在特定点连接，并且您希望它们在动画期间保持连接，那么将这些点焊接在一起将保证这两个形状将保持连接。

How to Weld Points

There are two ways to weld points in Moho: manually and automatically. 

To manually weld two points together with the Transform Points tool, first  uncheck the Auto-weld option for the tool.

Moho有两种焊接点的方法：手动和自动。

要使用变换点工具手动将两个点焊接在一起，首先取消选中该工具的自动焊接选项。

Drag one point on top of the other and press the Enter key. Here’s an example of  this method. Although you can’t see the keyboard in the example, keep in mind  that the Enter key was pressed at the moment when the two points overlap. After  welding, notice how the two points move as one.

将一个点拖到另一个点上，然后按 Enter 键。 这是此方法的一个示例。 尽管您在示例中看不到键盘，但请记住，在两点重叠的那一刻按下了 Enter 键。 焊接后，注意两点如何作为一个整体移动。

The second method of welding is automatic. For automatic welding to work, be  sure that the Auto-weld checkbox is turned on in the tool options area when the  Transform Points tool is active:

第二种焊接方法是自动的。 要使自动焊接起作用，请确保在“变换点”工具处于活动状态时工具选项区域中的“自动焊接”复选框已打开：

Using this method, when you drag a curve endpoint on top of another point , the  point turns green when it can be welded automatically. Let go of the mouse to  automatically weld the points together. 

Here’s an example of automatic welding. In this case, the Enter key was not pressed  to initiate the weld - as soon as the mouse is released, the two overlapping points  are automatically welded together.

使用此方法，当您将曲线端点拖到另一个点之上时，该点会在可以自动焊接时变为绿色。 放开鼠标自动将点焊接在一起。

这里以自动焊接为例。 在这种情况下，没有按下 Enter 键来启动焊接 - 只要松开鼠标，两个重叠点就会自动焊接在一起。

Here’s another example of automatic welding. Remember that only a curve  endpoint can be automatically welded. However, the point that it is welded to does  not need to be an endpoint:这是自动焊接的另一个例子。 请记住，只有曲线端点可以自动焊接。 但是，它被焊接到的点不需要是端点：

除了将两个点焊接在一起之外，Moho 还可以将一个点焊接到曲线段的中间。 这可以通过自动或手动焊接方法来完成。

Why to Weld Points

OK, so that covers welding points, but why do you want to weld points again? The  main reason is to create fillable shapes. In order to fill a shape with color, that shape  should be completely closed, either by overlapping lines or by shapes that are  welded together so that there are no gaps in the shape that you want to fill.

好的，这样就涵盖了焊接点，但是您为什么要再次焊接点呢？ 主要原因是创建可填充的形状。 为了用颜色填充形状，该形状应该完全封闭，通过重叠线或焊接在一起的形状，以便在要填充的形状中没有间隙。

By welding the two endpoints together, we can create a closed shape that can  then be filled:

通过将两个端点焊接在一起，我们可以创建一个可以填充的封闭形状：

Examples of Good Welding

Let’s look at some examples of good welding choices. First, the following two points  could be welded to create a single, continuous curve:让我们看一些良好的焊接选择示例。 首先，可以焊接以下两点以创建一条连续的曲线：

The next case shows the classic case of welding a curve closed to create a fillable  shape:下一个案例展示了焊接闭合曲线以创建可填充形状的经典案例：

Next, we show a shape made up of several curves. Notice that a closed, fillable  shape does not need to be made up of a single curve. The shape below, after  welding, is made up of three curve segments, but is still closed and can be filled with  color:

接下来，我们展示一个由几条曲线组成的形状。 请注意，封闭的可填充形状不需要由单条曲线组成。 下面的形状，焊接后，由三个曲线段组成，但仍然是封闭的，可以用颜色填充：

Finally, the example below shows two circles lined up side-by-side. The two side  points of the circles have been welded together so that when they move around  during an animation they remain joined. If those points were not welded, moving  them in sync like this would require a lot of extra work.

最后，下面的示例显示了两个并排排列的圆圈。 圆圈的两个侧点已焊接在一起，因此当它们在动画期间四处移动时，它们仍保持连接。 如果这些点没有焊接，像这样同步移动它们将需要大量额外的工作。

To maintain the separate colors in the two circles, Auto Fill is  turned off before welding the two circles together at a  common point.

为了保持两个圆圈中的不同颜色，自动填充是

在将两个圆圈焊接到一个共同点之前关闭。

Typically, when you weld together two points, one of them should be a curve  endpoint. This isn’t always true, but most often it is. If you find yourself welding  together two points and neither is an endpoint, take a moment to think whether the  weld is appropriate. Here’s an example of a bad choice of welding. Suppose you  had the following two shapes and you were considering welding the pairs of circled  points:

通常，当您将两个点焊接在一起时，其中一个应该是曲线端点。 这并不总是正确的，但大多数情况下确实如此。 如果您发现自己将两个点焊接在一起，而端点都不是，请花点时间考虑焊接是否合适。 这是一个糟糕的焊接选择的例子。 假设您有以下两种形状，并且您正在考虑焊接成对的圆圈点：

Although Moho will let you perform those welds, it isn’t really a good idea. What you  would end up creating is a shape with lots of little holes in it. Along the section of  curves that you welded together are little bubbles that make it impossible to fill the  two main shapes:

尽管 Moho 会让您执行这些焊接，但这并不是一个好主意。 你最终会创建一个有很多小洞的形状。 沿着焊接在一起的曲线部分是小气泡，无法填充两个主要形状：

相反，更好的方法是将两个形状靠得更近，根本不需要任何焊接。 在这种情况下，将两个形状焊接在一起没有任何好处。

Another approach in this situation would be to cut the top shape apart with  the Delete Edge tool and then weld the remaining endpoints to the lower  shape. First, cut the top shape apart:

在这种情况下，另一种方法是使用删除边缘工具将顶部形状切开，然后将剩余的端点焊接到下部形状。 首先，将顶部形状分开：

然后，将新创建的端点焊接到下部形状上。 使用这种方法，您最终不会得到一条全部焊接在一起的双曲线。 生成的形状更干净，更易于使用：

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