Learn how to create forms, edit forms, and thicken.
- [Instructor] Free form modeling takes an entirely different approach to defining three dimensional shapes. The level of creativity possible for defining model geometry is extraordinary. To begin creating a free form body, we need to move from the normal model environment to the sculpt environment. To do this I need to create a form. In the create panel of the toolbar, I'll select create form and I'll be given a warning that we're moving into the sculpt environment. The reason for this warning is that every step that we make will not be tracked individually in the timeline while we're in the sculpt environment.
I'll click okay, and then under the create pull down, I'll start out with a cylinder primitive. Selecting the face that I want to place this on, I'll roughen the diameter, and then I'll begin to pull out the basic height. I can add precise values, I can also change the number of faces around the circumference, as well as changing in either the dialogue or using the manipulator, the number of height faces.
We can also include elements such as symmetry, either circular or in this case, I want to work with a mirror symmetry, and this will be fine to begin my model. The cylinder primitive is an open primitive, so leaving the sculpt environment at this point in time would not create a solid model. However, a closed primitive such as the quad ball, the sphere, or the box, would immediately become a solid upon leaving the sculpt environment. From the marking menu I'll start the edit form tool, and begin to modify.
I'll double click the edges and begin to scale. I can roughen a value, or I can put in a precise value. The value entered will adjust it, this works for scaling as well as for moving an edge. So if I want to lift the edge up six millimeters, I simply type in six and it makes the adjustment. We can make other modifications, changing the angle, but also modifying the position that we're editing from, and then making a quick scaling edit, we're able to sharpen the point.
To add further detail, we can use tools such as insert edge. I'll deselect the edge that I'd previously had selected, and choose another edge. Drag the location for the new edge, and it will change the geometry based on that point. We can also use edit form on any individual face, or any individual point, to make the change. To bring this to a solid model, I'll close the bottom using the fill hole tool.
Fill hole has multiple options, I'll choose a fill star. Now this is a little too round so we can make additional edits. We can use the insert edge tool again, double clicking to select the entire edge, breaking the edge, and then bringing this new edge further down to the bottom, to make the bottom face flat, or perhaps concave. The last step I'll take is to thicken this model in the sculpt environment.
Under the modify tools, I'll choose thicken. I can choose the value that I want, for example I'd like to go inside of this shape two millimeters and set the thicken type to soft so the connected edges will have a curved face to them. Now when I finish form, it converts this model into a solid, and I can verify this by going to the properties, and being able to check the volume.
The basic tools of free form modeling will allow you to define shapes in a few minutes that could take hours to develop using lofts and sweeps, if they're possible to even be defined using those tools.
- Considerations for becoming certified
- Tips for taking the exam
- Creating a project
- Creating a 2D sketch
- Creating extrude features and revolve features
- Working with direct modeling
- Understanding assembly structure
- Creating drawing views
- Working with advanced modeling tools
- Generating data for 3D printing
- Performing a stress analysis