LapDraw — Trackpad Drawing by Sachin yadav

LapDraw is a developer-first drawing and diagramming tool engineered specifically for
laptop trackpads. Standard drawing tools assume an Apple Pencil or mouse — drawing with
your finger on a trackpad usually produces wobbly lines, friction stutter, and accidental
hooks.

LapDraw includes an on-device Intelligence Engine designed for trackpad physics:

• QuickShape (Hold-to-Snap): Draw rough lines, boxes, circles, decision diamonds,


cylinders, or arrows and hold still for 450ms — it instantly snaps into crisp vector
geometry.
• Friction Stabilizer: Real-time exponential moving-average filter removes trackpad
static friction jitter for smooth handwriting.
• Fishhook Eliminator: Automatically trims directional hook artifacts when lifting your
finger.
• Developer Diagram Builder (D): Generate Database Schemas (ER tables), Sequence
Diagrams with multi-actor lifelines and messages, UML Class cards, and Architecture nodes.
• In-Place Code & Text Tool (T): Monospace editor with Tab indentation, { CODE }
terminal card formatting, and developer callout tags ([TODO], [API], [NOTE], [BUG]).
• Developer Export Suite: Instant one-click Copy SVG markup, Copy React component (.tsx),
Copy Mermaid.js code, Markdown embed, PNG, and hand-rolled vector PDF.
• 100% Local & Private: Zero external dependencies, zero analytics, zero network
requests. All computations run locally inside your browser.

Keyboard Shortcuts:
• Alt+Shift+D: Toggle drawing overlay on any webpage
• Alt+Shift+C: Open infinite canvas whiteboard
• P: Pen | E: Eraser | L: Line | R: Box | O: Circle | A: Arrow | T: Text | D: Diagram


Builder | K: Dashed lines | M: Smart Assist | G: Grid Snap