SmartGrid – Grasshopper C# Component (Rhino3D-CAD App)

SmartGrid is a custom Grasshopper component that generates a rectangular grid of points on the XY-plane, with two selectable modes:

• All – use all grid points
• Border – use only the outer frame of the grid

It is implemented as a Grasshopper plugin in C# (.NET Framework) and compiled as a .gha library.

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📸 Preview

All Mode – Full Grid

All interior and boundary points are generated.

Border Mode – Frame Only

Only the outer border points (first/last row and first/last column) are generated.

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📦 Features

• Generates a grid of points over a rectangular area.
• Grid is centered at the world origin on the XY plane.
• Supports two modes:
  • All – every grid point
  • Border – only frame points
• Outputs:
  • P – list of Point3d grid points
  • Info – a short summary string, e.g. “15 points, mode = Border”

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🧮 Inputs

Name	Type	Default	Description
Width	Number	10.0	Total width of the grid in X direction
Height	Number	6.0	Total height of the grid in Y direction
Cols	Integer	5	Number of columns (points along X)
Rows	Integer	3	Number of rows (points along Y)
Mode	Text	"All"	"All" for full grid, "Border" for frame-only grid points

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🔧 Outputs

Name	Type	Description
P	Point List	List of generated grid points (Point3d)
Info	Text	Info string, e.g. "15 points, mode = All"

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🧠 Grid Logic

1. The rectangle is centered at (0,0,0) on the XY plane.
2. Step sizes are computed as:
   • xStep = width / (cols - 1)
   • yStep = height / (rows - 1)
3. The bottom-left starting point is:
   • xStart = -width / 2
   • yStart = -height / 2
4. Nested loops over rows and cols generate each point:
   • x = xStart + i * xStep
   • y = yStart + j * yStep
5. In Border mode, only points where:
   • i == 0, i == cols - 1, j == 0, or j == rows - 1 are kept.

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🚀 Installation

1. Build the project in Visual Studio as a
   Class Library (.NET Framework) targeting .NET Framework 4.8.

2. Ensure you reference:

   • RhinoCommon.dll
   • Grasshopper.dll

3. After building, rename the output .dll to .gha if needed, or configure the project to output .gha directly.

4. Copy the .gha file to your Grasshopper Libraries folder:

   Windows:

   %AppData%\Grasshopper\Libraries