05_Lauren Hillner

The surface offset tool allows you to duplicate a surface and move it a certain distance from the origin surface.  The “S” on the left stands for the surface you want to offset. “D” stands for the distance you want to offset the surface.  “T” stand for trimming the offset surface.

To begin, you need to create a surface:

1. Double click in Grasshopper and type in “point.” This will give you the point node.

2. Duplicate this three more times for a total of 4 point nodes.

3. Right click on one of the point nodes and click “set one point.”  This allows you to place the point in Rhino.  Do this to the other three point nodes to create a flat shape for the surface. (you should have four red X’s showing in Rhino)

4. Under the Surface tab and Freeform section is the 4point Surface button. Connect the four points to the A, B, C, and D parts of the surface node.  Sometimes it will connect wrong, and the surface formed in Rhino will be two triangles. Normally switching the last two points or first two points solves this issue. You now have a surface.

5. Under the Surface tab and Freeform section is the Offset button. Connect the “S” from the 4point Surface node to the “S” on the offset node.

6. Double click in grasshopper and type in “number slider.” Connect this to the “D” in offset. This node allows you to slide the duplicated surface a specific distance from the origin.

7. Right click on the slider node and under “values” is where you can change the distance of the offset.  Now you have a surface that is offset a specific distance from the original surface.

The green surface is the surface that has been offset.


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