Isotrim Tool

To use the Isotrim tool in Grasshopper, you must first open Rhino. In Rhino, type Grasshopper in the command bar and press enter. Once in Grasshopper, click on the Surface tab at the top of the window and go to the Utilities category. Once in this category, click the Isotrim button. This will bring up an orange box titled “SubSrf” with a small “S” (surface) and “D” (domain) on the left side of the box. Then you must create the surface and domain commands to connect to the Isotrim box. To create the base surface, go to the “Freeform” tab on the top of the screen and click “4 Point Surface”. Then create a base surface in Rhino (this will connect to the Grasshopper program). Then drag the wire from the “Srf4Pt” box to the “S” on the “SubSrf” box. Then you must create the Domain. To do this, go to the Math tab at the top of the Grasshopper screen. Then click on Domain (located in the top right corner of the Domain tab). Then you must change the domain range on the domain box (ex. A=2 and B=7). Then drag the wire from the Domain box to the “D” on the “SubSrf” box. At this point, the Domain and Surface should be connected to the Isotrim Command Box. If all of the wires are green, then you did it correctly. Good Job.

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