Week 06 | Introduction to Grasshopper: Primitive Geometry + Data Tree (LINES FROM POINTS)
GOAL: To learn the basics of Grasshopper and its relationship to Rhino by creating lines from points; to explain the fundamentals of Grasshopper’s Data Tree organization.
CLASS EXERCISES
| Introduction to Grasshopper: interface + components (types, uses, etc.) |
Script 3.1a: single line from points: create points in both Rhino and Grasshopper, create line, preview on/off, bake
- NOTES: Components You Will Need
- [Point] Holds 3D point geometry
- [ConstructPoint] Create a 3D point in Grasshopper
- [Slider] A range of numerical values
- [Line] Creates line between two points
- [Panel] Custom notes and data
- STEP 01: Create two points
- Method 01: First, create two points in Rhino. Reference these points in individual [Point] capsules. Hover over the component > right click > “Set One Point” > select the Rhino 3D point.
- Method 02: Retrieve a [ConstructPoint] component and three [Slider] components. Use these sliders for the X, Y, Z inputs.
- STEP 02: Create line (curve)
- Retrieve a [Line] component. Plug output of points into input of the line.
Script 3.1b: multiple lines from points, graft/flatten (Data Trees)
- NOTES: Components You Will Need
- [Point] Holds 3D point geometry
- [ConstructPoint] Create a 3D point in Grasshopper
- [Slider] A range of numerical values
- [Line] Creates line between two points
- [Panel] Custom notes and data
- [Move] Move geometry in a direction
- [DivideCurve] Divide curves into equal length segments
- [ParamViewer] Visualize data structure
- [ListItem] Access a specific item from a list
- [GraftTree] Removes all branches (condenses list)
- [FlattenTree] Adds branch (level of hierarchy)
- STEP 01: Copy previous script
- use Ctrl+C, Ctrl+V to do this
- STEP 02: “Copy” line
- use [Move] component to “copy” the initial line
- STEP 03: Divide lines
- use [DivideCurve] to create equal number of points on each line
- STEP 04: Create lines between points
- use the previously created points in conjunction with the [Line] component to create lines between them
- Use the [GraftTree] and [FlattenTree] components to understand underlying data structure
Deliverable (due at end of class period): “print screen”
| External Forces + Simple Operations (ATTRACTOR BASED ALGORITHMS)|
Script 3.1c: circles derived from GH square grid, first same radii, then with point-attractor cluster
Script 3.1d: 3D sub-divided NURBS surface point-attractor
Deliverable (due at end of class period): “print screen”
