1/29/2024 0 Comments Datum planeSelect the object and right-click to get a contextual menu that will offer both options. It is also possible to reorder features under a Body, or to move them to a different Body. It is possible to temporarily redefine the tip to a feature in the middle of the Body tree to insert new objects (features, sketches or datum geometry). Sketches can be attached to Origin planes, and they no longer need to be mapped to planar faces for features based on them to be added or subtracted from the model. The body has an Origin which consists of reference planes (XY, XZ, YZ) and axes (X, Y, Z) that can be used by sketches and features. It is possible to toggle the visibility of any feature in the body, by selecting it in the Model tree and pressing the Spacebar, in effect going back in the history of the body. There can only be one feature visible at a time. As a new feature is added to the body, visibility of the previous feature is turned off, and the new feature becomes the tip. A good analogy is the expression the tip of the iceberg: only the tip is visible above the water, most of the iceberg's mass (the other features) is hidden. This feature is defined by default as the tip. When a model requires multiple bodies, like the previous wooden chair example, the general purpose Part container can be used to group them and move the whole as a unit.Ī body will present by default its most recent feature to the outside. The highlighting color can be set in the preferences under Display/Colors/Active container since version 0.18. An activated body is highlighted in light blue. A body can be activated or deactivated by double clicking on it. The active body gets the new created features. Only one body can be active in a document. Multiple bodies can be created in a FreeCAD document they can also be combined to form a single contiguous solid. As a practical example, a wooden chair would be made of multiple bodies, with one for each of its sub-components (legs, slats, seat, etc). If the object involves nails, screws, glue or welding, it is not a single contiguous solid. What is a single contiguous solid? It is an object like a casting or something machined from a single block of metal. The PartDesign Body is a container that groups a sequence of features forming a single contiguous solid. Working in PartDesign requires first creating a Body. Procedural: can be said of features that are not based on sketches, like the transformation and dress-up features.Dress-up: features that apply a treatment to edges or faces, such as fillets/rounds, chamfers and drafts.Transformation features: they apply a transformation to existing features (mirrored, linear pattern, polar pattern, multitransform).Primitive-based: based on geometric primitives (cube, cylinder, cone, torus…).Subtractive features show red and blue icons. Subtractive: removes matter from the existing model.Additive: adds matter to the existing model.The profile can be a sketch, a planar face on existing geometry (a profile will be extracted from its edges), a ShapeBinder or a Draft object that has been included in the active Body. Profile-based: these features start from a profile to define the shape of the matter to be added or removed.In effect, this methodology mimics a common manufacturing process: a block is cut on one side, then on another side, holes are added, then rounds, etc.Īll features are listed sequentially in the Model tree and can be edited at any time, with the last feature at the bottom representing the final part.įeatures can be sorted into different categories: As more features are added to the model, each feature takes the shape of the previous one and adds or removes matter, creating linear dependencies from one feature to the next. The first feature is commonly called the base feature. A feature is an operation that modifies the shape of a model. While the Part Workbench and other workbenches construct models by combining shapes together (see Constructive solid geometry), the PartDesign workbench uses features. This page explains the way the PartDesign Workbench is intended to be used starting with FreeCAD 0.17.
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