Components Are Crucial

Select geometry and right-click to make a component

My abilities in SketchUp took a great leap forward when I gave up on drawing and began modelling, and I was able to take that step when I got a grip on using components rather than dealing with edges and faces. Most of what held me back was my training and practice in designing in two dimensions.

There was a bit of snootiness I needed to overcome. When I worked in the architectural millwork industry, I used to make fun of what I called “the tree house guys.” “The tree house guys” were people who didn’t really understand two dimensional plans, those who needed to see pieces of wood going together before they could make decisions.This approach works well if you have deep pockets or call yourself an artist (you can call it “composing” or “letting the wood speak”) but if you have any interest at all in working efficiently, the better you plan, the better the results.

Loose geometry sticks and stretches

When you create objects in SketchUp, they look like hunks of wood, but they have some qualities that real-life objects don’t. All the lines and faces that make up objects in SketchUp stick to each other, and when you move one thing, something else will stretch. This is actually a useful feature; it lets us make a board longer, change a butt joint to a miter joint, and create tapered parts quickly.

But if you want to see what one part looks like when stacked on another part, it’s as if every piece of wood in your shop was coated with crazy glue. Once you stick two pieces together, you can’t do anything else, and you can’t go back to what you had. I have seen people make incredibly complex models that are all sticky and stretchy, and I admire their patience. But models like that are nearly impossible to change or gather useful information from.

Edit a component to change it (and others with the same name) without affecting other parts of the model

The solution is to group things together into a component as soon as you possibly can. In my way of doing things, as soon as it looks like a stick, it becomes a component. It’s easy to do, select a bunch of geometry, either by drawing a box with the selection arrow, or by triple-clicking on a face. When all that stuff is highlighted, right-click and select “Make Component” from the menu. This cures the stickiness and stretchiness, and makes the object behave like a hunk of wood.

If you want to alter the component, double-click on it (or right-click and select “Edit Component” from the menu). Everything else in the model dims, the component is surrounded by a box to let you know it is “open” and the lines and faces in there are ready to be changed. When you’re done, click out in empty space to close the component.

Using components gives you the best of both worlds, you can take the tree house approach and see what things look like when you arrange them together. You don’t need the ability to draw, design or visualize before you begin. You can stick this here, put that there and see what you end up with. When you like what you see, all the information you need to build is right there waiting for you to pull it out.

–Bob Lang

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This is number 6 in a series of posts, read the entire series of “10 Things I Wish I Had Known About SketchUp”