SkigenPlot

Hardware-accelerated C++ plotting for the scientific and ML ecosystem — matplotlib for C++, but built on Vulkan/Metal/Direct3D from day one.

Why SkigenPlot?

• Zero-friction Eigen integration — pass any Eigen::MatrixBase<Derived> expression directly; no manual conversion.
• Real-time capable — dynamic vertex buffers and QRhi rendering sustain 60 Hz+ at 1M+ data points.
• LGPLv3/MIT safe — no QPainter, no Canvas; all rendering through QRhiWidget with raw GPU commands.
• Cross-platform GPU — Vulkan (Linux), Metal (macOS/iOS), Direct3D 12 (Windows) via Qt's RHI abstraction.

Quick Example

#include <skigen/plot/plotview.h>
#include <Eigen/Core>
#include <QApplication>
#include <numbers>

int main(int argc, char* argv[]) {
    QApplication app(argc, argv);

    Eigen::VectorXf x = Eigen::VectorXf::LinSpaced(500, 0.f,
        4.f * std::numbers::pi_v<float>);
    Eigen::VectorXf y = x.array().sin();

    Skigen::Plot::PlotView view;
    view.plot(x, y);
    view.show();

    return app.exec();
}

Architecture

Supported Plot Types

Type	Dimension	Status
Line plot	2D	v1.0.0
Scatter plot	2D	v1.0.0
Scrolling telemetry	2D	v1.0.0
Point cloud	3D	v1.0.0
Surface mesh	3D	v1.0.0

Dependencies

Library	Version	Purpose
Eigen 3	≥ 3.4	Matrix/vector types
Qt 6	≥ 6.7	Widgets + QRhi rendering
C++	23	std::span, std::expected, std::ranges