2. Find the "Projection Curve" icon indicated by the red arrow in the figure below under the standard column, and left-click the icon.

3. There are three options to choose from: relax, delete the input object and the destination layer. You can change these three options according to the needs of the model.

4. After selecting the option, as shown in the figure below, select the curve you want to project according to the system prompt, and press "enter" to confirm.

5. According to the instructions in the indicator bar, select the surface onto which the curve is projected, and press "enter" to confirm, as shown in the following figure.

6. At this point, we can see that there is another curve on the surface besides the original curve.

Precautions:

Rhino was used in industrial design in his early years and was good at product appearance modeling. However, with the development of program-related plug-ins, its application scope is wider and wider, and it has been widely used in the field of architectural design in recent years. Rhino and grasshopper parametric modeling plug-in can quickly make architectural modeling of various beautiful surfaces, and its simple operation method and visual operation interface are well received by designers. In addition, it is also widely used in jewelry, furniture, shoe mold design and other industries.