VortexKit

VortexKit is the visualization engine of the 2.0 .NET app, in src/VortexKit. It stays in this repo with that app. It is not a NuGet package, and ScalarScope 3.x, the Rust review, does not use it. It builds time-synced animated canvases, comparison views, and export pipelines for .NET MAUI.

Components

Component	What It Does
PlaybackController	Shared 0-1 timeline with play/pause/step/loop, speed presets (0.25x-4x), ~60 fps tick
AnimatedCanvas	Abstract SKCanvasView base with time-synced invalidation, grid drawing, touch/drag events, coordinate helpers
ITimeSeries<T> / TimeSeries<T>	Generic time-series with index-to-time mapping and trail enumeration
ExportService	Single-frame PNG, frame sequences (with ffmpeg hints), side-by-side comparison export
SvgExportService	Full-vector SVG with Inkscape layers, Catmull-Rom splines, heatmaps, vector fields, four color palettes
IAnnotation	Typed annotations (Phase, Warning, Insight, Failure, Custom) with theoretical basis and priority
VortexColors	Semantic color palette — background layers, accent semantics, severity coding, eigenvalue palette, lerp/gradient helpers

Shared playback

The PlaybackController drives all canvases from a single timeline. Bind multiple views so they stay in sync:

using VortexKit.Core;

var player = new PlaybackController { Duration = 10.0, Loop = true };

// Bind multiple canvases to the same timeline
player.TimeChanged += () =>
{
    trajectoryCanvas.CurrentTime = player.Time;
    eigenCanvas.CurrentTime      = player.Time;
    scalarsCanvas.CurrentTime    = player.Time;
};

Speed presets range from 0.25x to 4x. The controller exposes IncreaseSpeed() and DecreaseSpeed() methods and a SpeedDisplay property for UI binding.

Custom canvas

Subclass AnimatedCanvas and override OnRender to draw with SkiaSharp at the current timeline position:

public class MyTrajectoryCanvas : AnimatedCanvas
{
    protected override void OnRender(
        SKCanvas canvas, SKImageInfo info, double time)
    {
        // Your SkiaSharp rendering at the current timeline position
    }
}

AnimatedCanvas provides built-in support for grid drawing, touch and drag event handling, and coordinate system helpers for mapping between data space and pixel space.

Export

Side-by-side comparison PNG

var exporter = new ExportService();
await exporter.ExportComparisonAsync(
    leftRender, rightRender, time: 0.5,
    outputPath: "comparison.png",
    new ComparisonExportOptions
    {
        Width = 1920, Height = 1080,
        LeftLabel = "Baseline", RightLabel = "Optimized",
        ShowLabels = true
    });

Layered SVG (Inkscape-compatible)

var svgExporter = new SvgExportService();
await svgExporter.ExportSvgAsync(svgData, "trajectory.svg",
    new SvgExportOptions
    {
        Palette = SvgColorPalette.Publication,
        UseCatmullRomSplines = true,
        EnableGlow = false
    });

SVG export supports four color palettes: Default, Light, HighContrast, and Publication. Each palette is designed for a specific output context — use Publication for papers and reports where muted colors reproduce well in print.

Color system

VortexColors provides a semantic color palette with:

• Background layers — layered depth for card/panel nesting
• Accent semantics — consistent meaning across the UI (e.g., primary, secondary, warning)
• Severity coding — colors for success, warning, error, and neutral states
• Eigenvalue palette — distinct colors for spectral visualization
• Lerp and gradient helpers — interpolation utilities for heatmaps and continuous color mapping