The smooth curve segment are also broken down into sub-segments at places where there are inflection points or where the sharpness of the curve changes and it is convenient to add a sub-segment. Between these five points are four smooth curve segments. Notice there are five points of discontinuity along the front face. I will also refer to this SketchUp model profile as Jeremy in the future. The image at left is the SketchUp model of the cross section (profile) I created by tracing Jeremy above right. At this point of discontinuity there is an abrupt change in direction of the overall curve. Discontinuities on the other hand are points where a curve segment joins another curve segment (or line) and the two segments do not share the same tangent line. They are smooth transitions and mathematically both segments have the same tangent at that point of inflection. Points of inflection are points along a curve where the curve changes from convex to concave or concave to convex. Curves such as S-curves are made up of curve segments that join at a point of inflection.
SketchUp Profile with Discontinuities Labeledīefore I get into the steps for creating a cross section I want to make sure we are on the same page with terminology. The Bezier Curve Tool is the one I will use in this post and video. The Bezier Curve Tool is quick to learn and easy to use and the results are quite astonishing. It has numerous icons and can be a little intimidating if you don’t use it a lot, but it is my favorite for drawing complex curves. I have two favorites:īezier Spline is very flexible, draws polylines, Bezier curves and Spline curves. There are some really good and flexible extensions for SketchUp. If you don’t have a Bezier curve tool already you will need one for this procedure. Steps in Creating a Cross Section From a JPEG Image jpg profile shown above right found in an internet search. But first I want to review the steps used in Part 2 to create a cross section from a. In this post and accompanying video I will explain how you can create your own library and provide you with a few options for organizing the library. Hence forth they are available from the Components dialog box (Components library). However, it only takes a few extra minutes to add your creation to a library of moldings. So you may find yourself stuck creating it as I did in Part 2. jpg images such as I used in Country Style Cabinets with a Furniture Flair – Part 2 shown at right. However, many of the interesting moldings are. You can find thousands of moldings from internet searches, especially the 3D Warehouse.
You need a library of moldings to choose from. If you are a professional cabinetmaker you probably don’t want to spend your time creating moldings over and over. In Country Style Cabinets with a Furniture Flair – Part 1 and Part 2, I showed you how to add base and crown molding to a cabinet.
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