mirror of
https://github.com/wassname/simpeg.git
synced 2026-06-27 21:08:35 +08:00
Lindsey Heagy
64 lines
2.2 KiB
Python
64 lines
2.2 KiB
Python
from matutils import mkvc, ndgrid
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import numpy as np
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def surface2ind_topo(mesh, topo, gridLoc='CC'):
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# def genActiveindfromTopo(mesh, topo):
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"""
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Get active indices from topography
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"""
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if mesh.dim == 3:
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from scipy.interpolate import NearestNDInterpolator
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Ftopo = NearestNDInterpolator(topo[:,:2], topo[:,2])
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if gridLoc == 'CC':
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XY = ndgrid(mesh.vectorCCx, mesh.vectorCCy)
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Zcc = mesh.gridCC[:,2].reshape((np.prod(mesh.vnC[:2]), mesh.nCz), order='F')
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gridTopo = Ftopo(XY)
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actind = [gridTopo[ixy] <= Zcc[ixy,:] for ixy in range(np.prod(mesh.vnC[0]))]
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actind = np.hstack(actind)
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elif gridLoc == 'N':
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XY = ndgrid(mesh.vectorNx, mesh.vectorNy)
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gridTopo = Ftopo(XY).reshape(mesh.vnN[:2], order='F')
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if mesh._meshType not in ['TENSOR', 'CYL', 'BASETENSOR']:
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raise NotImplementedError('Nodal surface2ind_topo not implemented for %s mesh'%mesh._meshType)
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Nz = mesh.vectorNz[1:] # TODO: this will only work for tensor meshes
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actind = np.array([False]*mesh.nC).reshape(mesh.vnC, order='F')
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for ii in range(mesh.nCx):
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for jj in range(mesh.nCy):
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actind[ii,jj,:] = [np.all(gridTopo[ii:ii+2, jj:jj+2] >= Nz[kk]) for kk in range(len(Nz)) ]
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elif mesh.dim == 2:
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from scipy.interpolate import interp1d
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Ftopo = interp1d(topo[:,0], topo[:,1])
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if gridLoc == 'CC':
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gridTopo = Ftopo(mesh.gridCC[:,0])
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actind = mesh.gridCC[:,1] <= gridTopo
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elif gridLoc == 'N':
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gridTopo = Ftopo(mesh.vectorNx)
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if mesh._meshType not in ['TENSOR', 'CYL', 'BASETENSOR']:
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raise NotImplementedError('Nodal surface2ind_topo not implemented for %s mesh'%mesh._meshType)
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Ny = mesh.vectorNy[1:] # TODO: this will only work for tensor meshes
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actind = np.array([False]*mesh.nC).reshape(mesh.vnC, order='F')
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for ii in range(mesh.nCx):
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actind[ii,:] = [np.all(gridTopo[ii:ii+2] > Ny[kk]) for kk in range(len(Ny)) ]
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else:
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raise NotImplementedError('surface2ind_topo not implemented for 1D mesh')
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return mkvc(actind)
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