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CAD Clean Up & Making Faces

1.4_CAD Cleanup & Making Faces-REV

0:00 Before we turn our linework into faces to extrude, it’s usually a good idea to keep a copy of the original CAD base in the event you need it for reference later

0:09 So let’s select and copy using our modifier key and move it up along the blue axis.

0:17 If the CAD linework hasn’t been exploded yet and is still a component, feel free to exploded it or make it unique so that changes made to one do not affect the other.

0:30 Then create a new layer naming it ‘L-CAD’ and assign the linework to that layer and turn off for now.

0:32 Then create a new layer naming it ‘L-CAD’ and assign the linework to that layer and turn off for now.

0:36 Then create a new layer naming it ‘L-CAD’ and assign the linework to that layer and turn off for now.

0:42 With our backup in place, we can now safely make faces from our other CAD linework

0:47 For small areas you can just go into a linework group and trace a part of a line and see that the face fills in automatically.

0:56 But that would take too long for this much linework.

0:59 So instead we’re going to use an essential extension, that should be part of SketchUp’s native tool set, that will automate the creation of faces from all the edges all at once.

1:10 Let’s start by turning off the furnishings, grading, and trees layers so we’re left with just our site linework.

1:21 Go ahead and select and explode this group.

1:24 Then, select all the ground plane linework and run the ‘Face Creator’ extension.

1:30 Then, select all the ground plane linework and run the ‘Face Creator’ extension.

1:30 As mentioned earlier, even if we do a perfect job of cleaning up CAD linework, there’s a good chance we’re going to still ha joined faces…

1:40 …which requires some additional work in SketchUp to either fill in or separate.

1:44 Let’s undo that last make faces command and this time we’ll first run ThomThom’s ‘Edge Tools’ extension to help close and remove any overlooked linework gaps that might still be present.

1:59 Select all of the base linework again, and then go to ‘Tools’/EdgeTools/Close All Edge Gaps.’…

2:09 ...and set a really small number like '.25 inches' and hit ok.

2:15 Another helpful extension by Eneroth is ‘Flatten to Plane’.

2:19 This model’s linework is already flat to begin with but your future CAD drawings are bound to have some stray geometry with different Z-values, or heights…

2:29 …especially if you work with engineering sur

2:38 So let’s now try to make faces again and see if anything changes.

2:45 We can see that it has.

2:48 The faces are all created and separate from one another and are now ready for assigning materials and layers to different design elements in the next lesson.