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Eraser

SU Fundamentals 5-6 Eraser

0:02 To complete this course on drawing tools, we need to spend some time on the eraser.

0:09 As you may have already discovered, the eraser tool only works on edges, it won’t erase surfaces.

0:17 You can click on individual edges or groups to erase them, but the eraser is the other tool that actually benefits from holding down the mouse button.

0:28 Hold down the mouse button, then scrub over a series of entities in your model and watch them all become highlighted.

0:36 When you release the button they will all be deleted.

0:40 Now, something that we haven’t talked about, is that each tool has its own focus area.

0:46 For example the pencil tool starts drawing a line from the tip of the pencil, and the push/pull tool starts from the top of the arrow.

0:56 The eraser has a small circle to help you know where the focus area is, which is really useful when you are trying to erase within a small area.

1:07 The eraser tool actually does more than simply erasing edges.

1:12 With the eraser active, the tool hints talk about hiding edges and softening them as well.

1:19 This gothic style window will be a good example.

1:22 This many visible edges could be distracting, but I can’t erase any edges without destroying the geometry.

1:30 However I can hide or soften the edges.

1:35 To hide an edge with the eraser tool, hold the SHIFT key down while erasing edges.

1:41 Hiding edges only affects the edges, you can see the shading of the surfaces remain the same.

1:49 Now, hold down the CTRL key on a PC, or the Option key on a Mac, and erasing edges will soften them instead.

1:58 The difference is in how the surfaces are rendered.

2:02 Softening an edge will also soften the surfaces connected to those edges, so the rendering effect creates an overall smoother transition.