Name That Geometry
This geometric entity has length but no width or thickness and is defined by two endpoints.
What is a line segment?
This type of curve is controlled by a set of control points but generally does not pass through all of them.
What is a Bézier curve?
This surface is created by moving a profile curve along a specified path.
What is a swept surface?
This solid modelling technique builds complex objects using primitives combined with Boolean operations.
What is Constructive Solid Geometry (CSG)?
Geometric modelling is widely used before manufacturing in this computer-aided design system.
What is CAD?
This coordinate system represents a point using three values: x, y, and z.
What is the Cartesian coordinate system?
Unlike Bézier curves, these curves provide local control, meaning changing one control point affects only part of the curve.
What are B-spline curves?
This modelling technique creates a surface by connecting multiple cross-sectional profiles.
What is lofting (lofted surface)?
This representation stores faces, edges, and vertices to describe the boundary of a solid.
What is Boundary Representation (B-Rep)?
Engineers commonly use this manufacturing technology to quickly produce physical prototypes directly from CAD models.
What is Additive Manufacturing (3D Printing)?
Unlike a wireframe model, this model contains complete information about volume and enclosed space.
What is a solid model?
This mathematical representation extends B-splines by using weights to represent exact circles and conic sections.
What are NURBS?
A surface generated by joining corresponding points on two boundary curves is called this.
What is a ruled surface?
The Boolean operation used to find the common volume shared by two solids is called this.
What is Intersection?
Reverse engineering often begins by capturing an object's geometry using this technology.
What is 3D scanning (or laser scanning)?
This property describes how two curve segments meet smoothly without changing direction abruptly.
What is geometric continuity (G1 continuity)?
A designer needs to modify only a small region of a complex curve without affecting the entire shape. Which curve representation is most suitable?
What is a B-spline curve?
An automotive designer requires a highly smooth free-form surface with excellent continuity. Which surface representation is commonly used?
What is a NURBS surface?
Which representation is generally better suited for storing explicit topological relationships between faces and edges?
What is Boundary Representation (B-Rep)?
A biomedical engineer needs an exact model of a patient's bone from scan data for implant design. Which process is most appropriate?
What is reverse engineering?
An engineer needs a model suitable for mass-property calculations and Boolean operations. Which modelling representation should be chosen?
What is solid modelling?
Increasing the degree of a Bézier curve without changing its shape is known by this term.
What is degree elevation?
Between a ruled surface and a lofted surface, which generally offers greater flexibility for modelling complex aerodynamic shapes?
What is a lofted surface?
A CAD model requires frequent Boolean operations using standard geometric primitives. Which modelling approach is typically preferred?
What is Constructive Solid Geometry (CSG)?
An automotive company needs a highly accurate free-form body panel for aerodynamic performance. Which geometric modelling technique is the best choice?
What is NURBS surface modelling?