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Antlion / Components / Startline Rect

Startline RectSTARTLINE-001

Start line for the front row, offset outward from the field edge by a long-side and a short-side distance. Optional rounded or chamfered corners.

1Plan & setup
2Section
32D layout
43D solids
5Analysis

core Bowl ▸ Section 1 7 in · 5 out

Fig. 1 — PortsReads left, writes right
Startline Rect component in Grasshopper
Field Info FieldObject · itemThe field, straight from Field
Source Outline SourceCurve · itemOffset from this curve instead
Corner Mode ▾ CornerText · itemHow the four corners are treated: square, arc or straight cut
Offset Long Off LongNumber · itemGap from the long sides of the field to the front row
Offset Short Off ShortNumber · itemGap from the short (goal) ends of the field to the front row
Corner Size Corner SNumber · itemCorner arc radius, or chamfer cut-back
Panel Values PanelObject · itemEvery value from Input Panel, as one bundle
Start Line StartObject · itemThe start line as one object
Start Line Curve CurveCurve · itemThe start line itself, a closed curve in plan
Arc Centers CentersPoint · listCenter point of each rounded corner
Arc Radii RadiiNumber · listRadius of each corner arc, matching Arc Centers
Debug Text · itemDeveloper diagnostic output for tracking down bugs

Colored ports carry the chain from one component to the next. The rest are values you set once. Inputs marked ▾ take a Value List: wire one in and it fills with the choices.

Inputs

  • Field InfoFieldThe field, straight from Field - gives the outline and its rotation
  • Source OutlineSourceOffset from this curve instead. Used only when Field Info is not wired
  • Corner Mode▾ CornerHow the four corners are treated: square, arc or straight cut (default NONE)
  • Offset LongOff LongGap from the long sides of the field to the front row (default 5000 mm)
  • Offset ShortOff ShortGap from the short (goal) ends of the field to the front row (default 5000 mm)
  • Corner SizeCorner SCorner arc radius, or chamfer cut-back. Ignored when Corner Mode is NONE (default 2000 mm)
  • Panel ValuesPanelEvery value from Input Panel, as one bundle. Anything you wire in yourself wins over it

Outputs

  • Start LineStartThe start line as one object - curve plus its arc data. Wire into Axis
  • Start Line CurveCurveThe start line itself, a closed curve in plan
  • Arc CentersCentersCenter point of each rounded corner (empty unless Corner Mode is ROUND)
  • Arc RadiiRadiiRadius of each corner arc, matching Arc Centers
  • DebugDebugDeveloper diagnostic output for tracking down bugs. Copy this when reporting a problem
Component
STARTLINE-001
Ribbon
Bowl ▸ Section 1
Tier
core
Ports
7 in · 5 out
Version
1.0.11
Checked
2026-10-07