canvas

The central drawing canvas renders the active geometric model as an interactive scalable vector graphic (SVG).

Cartesian Coordinate System

• Flipped Y-Axis: The canvas uses standard Cartesian coordinates where positive Y extends upwards and positive X extends rightwards.

• Infinite Vector Precision: Crisp vector rendering ensures elements remain sharp at any zoom scale.

Navigation & Viewport Controls

• Pan & Zoom: Click and drag to pan across the model space; use mouse scroll wheel to zoom in and out.

• Fit Viewport: Press the f hotkey at any time to automatically calculate the bounding volume of all active elements and fit the construction within your viewport.

Hover Cards & Symbolic Math

Hovering your cursor over any geometric element triggers a dynamic hover card displaying symbolic algebraic and numerical properties powered by KaTeX:

• Points: Exact SymPy algebraic expressions for X and Y coordinates alongside 6-decimal approximations.

• Lines: Exact polynomial equations, line coefficients, and defining point references.

• Circles: Exact center point (h, k) coordinates and radius r.

• Segments & Sections: Length ratios, Golden ratio indicators, and endpoint definitions.

• Polygons: Vertex sequences, area metrics, and angular spreads.

Ancestor Dependency Highlighting

Toggle the Ancestor Highlighting feature via the sidebar button (account_tree icon) or Settings. When enabled, hovering over any constructed element highlights all parent elements (points, lines, circles) that were used to construct it, rendering a visual lineage tree directly on the canvas.