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Inferences

SU Fundamentals 2-2 Inferences

0:02 For this lesson we still have the example file opened and we are going to the 3rd scene tab.

0:11 Some of this lesson will be a review of what we just learned.

0:15 We want to examine some of the same ideas on a slightly more complicated example, in our case, a floor plan.

0:23 Us the selection arrow to click around and select different edges and surfaces.

0:32 Remember that a surface has to have a complete loop of edges to exist...

0:37 ..and that you can merge coplanar surfaces together by erasing the edges dividing them or further divide surfaces by drawing additional lines.

0:48 As you've been drawing, you probably noticed that Sketchup snaps to the axis directions:

0:55 Red, green and blue.

0:59 So far we've only been drawing in the red and green directions. We also refer to these as inference directions.

1:08 Other inferences are the midpoints, edge points and endpoints.

1:13 We are going to learn how to combine these inference points and inference directions together.

1:20 Select the line tool and remember that we want to single click once to start our line. Click-move-click is how we want to draw lines.

1:31 I'll click once on this corner endpoint and then I'm free to move the mouse without holding down the mouse button.

1:39 Watch what happens as I hover over other points in the model. I'm not clicking on these points only hovering for about two seconds.

1:50 Now I can draw a line in the red direction and get an inference to the points I just hovered over.

1:57 I still haven't clicked my mouse the second time so can hover over other points and find inference hints to those points as well.

2:09 It's important to watch carefully for the two access directions. I'm drawing in the red direction and looking for inferences in the green direction.

2:22 Once I find the combined inference point I need, I can click to finish drawing this line.

2:30 This technique of combining inferences is really powerful so it's worth practicing.

2:38 Let's erase the edge we just drew and then click on the fourth scene tab to practice drawing with basic inferences.

2:47 This shape is set up with many points to inference to.

2:54 You can start simply by just drawing one line and hovering over points to find the inferences to them.

3:01 Once you are comfortable with that then start drawing to those points and creating a shape.

3:08 You can choose any points you'd like and you can also practice finding inferences in the red and the green direction create

3:17 Create any shape you'd like and remember, take your time and make sure you see both inferences as you click to draw lines.

3:26 When you finish you should be creating a new surface.

3:30 Continue practicing on this example until you are very comfortable combining inferences.

3:37 When you are ready return to the floor plan in scene 3.

3:41 I'm going to show a few new walls on this plan, drawn using only inferences from the existing walls

3:49 See if you can create these walls on your own. If you need help, we'll show the solution in the next lesson.