feat: Update SSplines to 3.0.0

.github/workflows/release.yml

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+name: Release to PyPI
+
+on:
+  push:
+    tags:
+      - 'v*'  # Triggers on version tags like v3.0.0
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.13"]
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Install uv
+      uses: astral-sh/setup-uv@v3
+
+    - name: Install dependencies
+      run: |
+        uv sync --extra dev
+
+
+    - name: Run tests
+      run: |
+        uv run pytest
+
+  build-and-publish:
+    needs: test
+    runs-on: ubuntu-latest
+    environment: release
+    permissions:
+      id-token: write  # Required for trusted publishing
+      contents: write  # Required for creating releases
+
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0  # Get full history for proper versioning
+
+    - name: Set up Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: "3.13"
+
+    - name: Install uv
+      uses: astral-sh/setup-uv@v3
+
+    - name: Build package with uv
+      run: |
+        uv build
+
+    - name: Check package
+      run: |
+        uv run twine check dist/*
+
+    - name: Publish to PyPI
+      uses: pypa/gh-action-pypi-publish@release/v1
+      # This uses trusted publishing - no API tokens needed!
+
+    - name: Extract changelog for this version
+      id: changelog
+      run: |
+        # Extract the section for this version from CHANGELOG.md
+        VERSION=${GITHUB_REF#refs/tags/v}
+        echo "VERSION=$VERSION" >> $GITHUB_OUTPUT
+
+        # Extract changelog section between [VERSION] and next [VERSION] or end of file
+        CHANGELOG=$(awk "/^\## \[$VERSION\]/{flag=1; next} /^\## \[/{flag=0} flag" CHANGELOG.md)
+
+        # If no specific section found, use a default
+        if [ -z "$CHANGELOG" ]; then
+          CHANGELOG="See the [full changelog](https://github.com/qTipTip/SSplines/compare/v2.0.1...${GITHUB_REF_NAME}) for details."
+        fi
+
+        # Save changelog to output (handle multiline)
+        {
+          echo "CHANGELOG<<EOF"
+          echo "$CHANGELOG"
+          echo "EOF"
+        } >> $GITHUB_OUTPUT
+
+    - name: Create GitHub Release
+      uses: softprops/action-gh-release@v1
+      with:
+        files: dist/*
+        generate_release_notes: true
+        body: |
+          ## Changes in ${{ github.ref_name }}
+
+          ${{ steps.changelog.outputs.CHANGELOG }}
+
+          ---
+
+          **Installation**: `pip install SSplines==${{ steps.changelog.outputs.VERSION }}`
+
+          **Full Changelog**: https://github.com/qTipTip/SSplines/compare/v2.0.1...${{ github.ref_name }}
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/test.yml

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+name: Tests
+
+on:
+  push:
+    branches: [ main, master ]
+  pull_request:
+    branches: [ main, master ]
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        python-version: ["3.13"]
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Install uv
+      uses: astral-sh/setup-uv@v3
+
+    - name: Install dependencies
+      run: |
+        uv sync --extra dev
+
+    - name: Run tests with coverage
+      run: |
+        uv run pytest --cov=SSplines --cov-report=xml
+
+    - name: Upload coverage reports to Codecov
+      if: matrix.os == 'ubuntu-latest'  # Only upload once
+      uses: codecov/codecov-action@v5
+      with:
+        token: ${{ secrets.CODECOV_TOKEN }}
+
+    - name: Upload coverage to GitHub
+      if: matrix.os == 'ubuntu-latest'  # Only upload once
+      uses: actions/upload-artifact@v4
+      with:
+        name: coverage-report
+        path: htmlcov/
+        retention-days: 30
+        compression-level: 6
+
+  # This job will be required for branch protection
+  test-summary:
+    if: always()
+    runs-on: ubuntu-latest
+    needs: [test]
+    steps:
+    - name: Check test results
+      run: |
+        if [[ "${{ needs.test.result }}" == "failure" ]]; then
+          echo "Tests failed!"
+          exit 1
+        elif [[ "${{ needs.test.result }}" == "cancelled" ]]; then
+          echo "Tests were cancelled!"
+          exit 1
+        else
+          echo "All tests passed!"
+        fi

.python-version

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+3.13

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [3.0.0] - 2025-06-26
+
+### Breaking Changes
+- **Python 3.13+ required**: Dropped support for Python < 3.13
+- Modernized build system to use pyproject.toml instead of setup.py
+
+### Changed
+- Updated numpy to modern versions (>= 1.24.0)
+- Migrated from setup.py to pyproject.toml
+- Added automated CI/CD pipeline with GitHub Actions
+
+### Dependencies
+- numpy >= 1.24.0
+- sympy >= 1.10
+
+## [2.0.1] - 2018-09-03
+
+### Fixed
+- Various bug fixes and improvements
+- Updated documentation
+
+### Added
+- Initial implementation of S-splines on Powell-Sabin 12-split
+- SplineFunction and SplineSpace objects
+- Support for constant, linear, and quadratic splines
+- Hermite basis conversion
+- Triangle sampling methods
+- Basic integration methods

CITATION.cff

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+cff-version: 1.2.0
+message: "If you use this software, please cite it as below."
+type: software
+title: "SSplines: Simplex Splines on the Powell-Sabin 12-split"
+abstract: "A Python library for the evaluation of simplex splines over the Powell-Sabin 12-split of a triangle. The library provides efficient evaluation using the matrix recurrence relation for S-spline basis functions for constant, linear, and quadratic simplex splines."
+authors:
+  - family-names: "Stangeby"
+    given-names: "Ivar Haugaløkken"
+    email: "istangeby@gmail.com"
+    orcid: "https://orcid.org/0000-0002-7697-7526"
+version: "2.0.1"
+date-released: "2024-12-20"
+license: MIT
+repository-code: "https://github.com/qTipTip/SSplines"
+url: "https://github.com/qTipTip/SSplines"
+doi: "10.5281/zenodo.15742326"
+keywords:
+  - "splines"
+  - "finite element method"
+  - "Powell-Sabin"
+  - "simplex splines"
+  - "numerical analysis"
+  - "computational geometry"
+  - "interpolation"
+  - "multivariate splines"
+
+# Preferred citation for the software
+preferred-citation:
+  type: thesis
+  title: "Simplex Splines on the Powell-Sabin 12-Split"
+  authors:
+    - family-names: "Stangeby"
+      given-names: "Ivar Haugaløkken"
+  thesis-type: "Master thesis"
+  institution:
+    name: "University of Oslo"
+  year: 2018
+  url: "http://hdl.handle.net/10852/64070"
+  identifiers:
+    - type: "other"
+      value: "URN:NBN:no-66606"
+      description: "URN"
+
+# Related references
+references:
+  - type: article
+    title: "S-splines"
+    authors:
+      - family-names: "Cohen"
+        given-names: "Elaine"
+      - family-names: "Lyche"
+        given-names: "Tom"
+      - family-names: "Riesenfeld"
+        given-names: "Richard"
+    journal: "Mathematics of Computation"
+    volume: 82
+    issue: 283
+    start: 1577
+    end: 1596
+    year: 2013
+    doi: "10.1090/S0025-5718-2013-02664-6"
+    scope: "Theoretical foundation for the S-splines implementation"