LISPNodeFlow

LISPNodeFlow - Visual AutoLISP Builder

Overview

LISPNodeFlow is a web-based visual programming environment for creating AutoLISP code. Inspired by Dynamo for Revit and Grasshopper for Rhino, it allows AutoCAD users to create complex AutoLISP scripts without writing code directly.

Key Features

• Visual Node Editor - Connect nodes instead of writing code
• Geometry Creation - Create lines, circles, rectangles, and more
• Logic & Math Operations - Perform calculations and conditional logic
• Function Definition - Define reusable AutoLISP functions
• Export to AutoLISP - Generate clean, readable LISP code that works in AutoCAD

How It Works

1. Add Nodes - Drag nodes from the left sidebar into the workspace
2. Configure Values - Set parameters for each node
3. Connect Nodes - Link outputs to inputs by clicking and dragging
4. Export Code - Generate AutoLISP code with a single click

Node Categories

Basic

Foundation nodes for values and variables:

• Variable - Create a named variable
• Number - Numeric constant value
• String - Text value
• Point - 3D coordinate point (X, Y, Z)

Operators

Mathematical operations:

• Addition - Add two or more values
• Subtraction - Subtract values
• Multiplication - Multiply values
• Division - Divide values

Geometry

Create AutoCAD entities:

• Line - Draw a line between two points
• Circle - Create a circle from center and radius
• Rectangle - Draw a rectangle from two corners
• Polyline - Create a polyline from a series of points

Logic

Conditional operations and comparisons:

• If Condition - Perform conditional branching
• Equals - Test if two values are equal
• Greater Than - Check if one value is greater than another
• Less Than - Check if one value is less than another

Functions

Define and use functions:

• Define Function - Create a named function with parameters
• For Each - Iterate through a list of items
• While Loop - Repeat operations while a condition is true
• Custom Function - Manually define a function with custom code

Technical Implementation

LISPNodeFlow is built using vanilla JavaScript, HTML5, and CSS3. It uses a custom node-based graph editor implementation with the following components:

• Node Management - Creating, moving, and connecting nodes
• Connection Handling - Bezier curve connections between nodes
• Code Generation - Recursive traversal of the node graph to generate LISP code
• Workspace Controls - Panning and zooming of the workspace

Use Cases

• Creating parametric drawing routines
• Automating repetitive drafting tasks
• Building custom drawing tools for AutoCAD
• Learning AutoLISP programming visually
• Prototyping complex geometry generators

Try It Now

Click the "Launch Project" button to start using LISPNodeFlow and create your own AutoLISP code visually!