67 lines
1.6 KiB
Cython
67 lines
1.6 KiB
Cython
from libcpp cimport bool
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from libcpp cimport string as cppstring
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import numpy as np
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cimport numpy as np
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from cpython cimport PyObject, Py_INCREF
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cimport cython
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np.import_array()
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cdef extern from "cic.hpp" namespace "CosmoTool":
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ctypedef float CICType
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ctypedef float Coordinates[3]
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cdef cppclass CICParticles:
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float mass
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Coordinates coords
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cdef cppclass CICFilter:
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CICFilter(np.uint32_t resolution, double L) nogil
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void resetMesh() nogil
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void putParticles(CICParticles* particles, np.uint32_t N) nogil
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void getDensityField(CICType *& field, np.uint32_t& res) nogil
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@cython.boundscheck(False)
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@cython.cdivision(True)
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@cython.wraparound(False)
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def leanCic(float[:,:] particles, float L, int Resolution):
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cdef CICParticles p
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cdef CICFilter *cic
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cdef np.uint64_t i
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cdef CICType *field
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cdef np.uint32_t dummyRes
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cdef np.ndarray[np.float64_t, ndim=3] out_field
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cdef np.ndarray[np.float64_t, ndim=1] out_field0
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cdef np.float64_t[:] out_field_buf
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cdef np.uint64_t j
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cic = new CICFilter(Resolution, L)
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cic.resetMesh()
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if particles.shape[1] != 3:
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raise ValueError("Particles must be Nx3 array")
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p.mass = 1
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for i in xrange(particles.shape[0]):
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p.coords[0] = particles[i,0]
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p.coords[1] = particles[i,1]
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p.coords[2] = particles[i,2]
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cic.putParticles(&p, 1)
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field = <CICType*>0
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dummyRes = 0
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cic.getDensityField(field, dummyRes)
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out_field = np.empty((dummyRes, dummyRes, dummyRes), dtype=np.float64)
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out_field0 = out_field.reshape(out_field.size)
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out_field_buf = out_field
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for j in xrange(out_field_buf.size):
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out_field_buf[j] = field[j]
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del cic
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return out_field
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