Mesh: QuadTree: FaceDivΒΆ

(Source code, png, hires.png, pdf)

../../_images/Mesh_QuadTree_FaceDiv-1.png
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from SimPEG import Mesh
import matplotlib.pyplot as plt


def run(plotIt=True, n=60):
    """
        Mesh: QuadTree: FaceDiv
        =======================



    """

    M = Mesh.TreeMesh([[(1, 16)], [(1, 16)]], levels=4)
    M._refineCell([0, 0, 0])
    M._refineCell([0, 0, 1])
    M._refineCell([4, 4, 2])
    M.__dirty__ = True
    M.number()

    if plotIt:
        fig, axes = plt.subplots(2, 1, figsize=(10, 10))

        M.plotGrid(cells=True, nodes=False, ax=axes[0])
        axes[0].axis('off')
        axes[0].set_title('Simple QuadTree Mesh')
        axes[0].set_xlim([-1, 17])
        axes[0].set_ylim([-1, 17])

        for ii, loc in zip(range(M.nC), M.gridCC):
            axes[0].text(loc[0]+0.2, loc[1], '{0:d}'.format(ii), color='r')

        axes[0].plot(M.gridFx[:, 0], M.gridFx[:, 1], 'g>')
        for ii, loc in zip(range(M.nFx), M.gridFx):
            axes[0].text(loc[0]+0.2, loc[1], '{0:d}'.format(ii), color='g')

        axes[0].plot(M.gridFy[:, 0], M.gridFy[:, 1], 'm^')
        for ii, loc in zip(range(M.nFy), M.gridFy):
            axes[0].text(
                loc[0]+0.2, loc[1]+0.2, '{0:d}'.format(
                    (ii+M.nFx)
                ),
                color='m'
            )

        axes[1].spy(M.faceDiv)
        axes[1].set_title('Face Divergence')
        axes[1].set_ylabel('Cell Number')
        axes[1].set_xlabel('Face Number')

if __name__ == '__main__':
    run()
    plt.show()