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steveruizok avatar

steveruizok/perfect-freehand

0
View on GitHub↗
5,606 stars·210 forks·HTML·MIT·26 viewsperfectfreehand.com↗

Perfect Freehand

perfect-freehand is a mathematical utility for generating smooth, organic vector path outlines from point data. It functions as a pressure-sensitive stroke generator that converts sequences of coordinates into polygon outlines to simulate variable-width freehand lines.

The library specializes in digital ink rendering and stylus input visualization, mapping precision data from drawing tablets or movement speed to visual stroke widths. It provides the geometric primitives necessary to create custom brush implementations that simulate the appearance of real ink or markers on a digital canvas.

The system handles freehand line smoothing and the generation of SVG path outlines by transforming raw input points into two-dimensional shapes suitable for filling or stroking.

Features

  • Digital Ink Rendering - Converts sequences of raw input points into polished vector outlines for digital ink rendering.
  • Pressure Simulation - Calculates realistic line thickness based on point distance or stylus pressure values.
  • Polygon Outline Generation - Constructs closed shapes by calculating perpendicular offset points to create filled vector strokes.
  • Path Smoothing - Uses a mathematical approach to refine and smooth the control points of freehand vector curves.
  • Point-to-Polygon Transformation - Transforms linear sequences of coordinates into two-dimensional shapes suitable for filling or stroking.
  • Spline Interpolators - Implements Catmull-Rom spline interpolation to smooth raw input points into continuous organic curves.
  • Velocity-Based Stroke Weighting - Calculates variable line thickness by measuring distances between sequential points to simulate pen speed and pressure.
  • Pressure-Sensitive Stroke Generation - Converts sequences of points into polygon outlines to simulate variable-width freehand lines.
  • Stroke Outline Generation - Generates the geometric filled area of a stroke that expands and contracts based on pressure.
  • Pressure-Sensitive Drawing - Creates smooth hand-drawn lines that vary in thickness based on pen pressure or movement speed.
  • Stylus Input Visualization - Maps precision drawing tablet data to visual stroke widths for a natural writing experience.
  • Custom Brush Definitions - Provides the geometric primitives necessary to define custom digital brush behaviors and stroke styles.
  • SVG Path Outline Generation - Creates the outer boundary polygons of brush strokes for rendering in vector graphics.

Star history

Star history chart for steveruizok/perfect-freehandStar history chart for steveruizok/perfect-freehand

How this analysis was created: This summary and feature list are AI-generated from collected project material and can contain mistakes. Stars, license and language are imported from GitHub. Inclusion does not mean that we have tested or audited this project. Check the source documentation for any feature you depend on. Learn more on our About page.

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Frequently asked questions

What does steveruizok/perfect-freehand do?

perfect-freehand is a mathematical utility for generating smooth, organic vector path outlines from point data. It functions as a pressure-sensitive stroke generator that converts sequences of coordinates into polygon outlines to simulate variable-width freehand lines.

What are the main features of steveruizok/perfect-freehand?

The main features of steveruizok/perfect-freehand are: Digital Ink Rendering, Pressure Simulation, Polygon Outline Generation, Path Smoothing, Point-to-Polygon Transformation, Spline Interpolators, Velocity-Based Stroke Weighting, Pressure-Sensitive Stroke Generation.

Which projects share features with steveruizok/perfect-freehand?

Projects with overlapping indexed features include: microsoft/windows-universal-samples — This repository is a comprehensive collection of reference implementations and sample libraries for the Universal… adil192/saber — Saber is a cross-platform handwriting application and digital ink organizer designed for creating, storing, and… mathnet/mathnet-numerics — This project is a numerical computing library designed for scientific and engineering mathematical operations. It… zhm-real/pathplanning — PathPlanning is a library of animated path planning algorithms that includes implementations of A-star, Dijkstra, RRT,… manuelbieh/geolib — Geolib is a geospatial calculation library and point analysis tool. It provides a collection of utilities for… paperjs/paper.js — Paper.js is an HTML5 Canvas vector graphics library and scripting framework used for creating and manipulating 2D…

Projects sharing features with Perfect Freehand

These projects share indexed features with Perfect Freehand. Shared tags can include platform or build tooling; verify the primary use case before treating a result as a replacement.
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    This project is a numerical computing library designed for scientific and engineering mathematical operations. It functions as a comprehensive linear algebra framework, a statistical analysis library, and a toolkit for mathematical optimization and numerical integration. The library is distinguished by its provider-based native acceleration, which allows managed code to be swapped for platform-native binary libraries to increase the performance of computationally intensive routines. It also supports a hybrid approach to matrix storage, implementing separate strategies for dense and sparse mat

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  • manuelbieh/geolibmanuelbieh avatar

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    Geolib is a geospatial calculation library and point analysis tool. It provides a collection of utilities for computing distances, bearings, and areas between coordinates, as well as converting geographic measurements and coordinate formats. The library features a Well-Known Text geometry parser to convert WKT strings into coordinate structures for polygon analysis. It includes specialized tools for geofencing and point containment, enabling the determination of whether a coordinate falls within a defined polygon or a specified radius. The toolset covers broad capability areas including loca

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