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arryop.pyx
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arryop.pyx
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cimport cython
import numpy as np
cimport numpy as np
# cdef double[::1] cross(double* arr1,double* arr2):
# cdef:
# double[::1] outarr = np.array([(arr1[1] * arr2[2]),(arr1[2] * arr2[0]),(arr1[0] * arr2[1])],dtype=np.float64)
# double* outptr = &outarr[0]
# # outptr[0] = (arr1[1] * arr2[2])
# outptr[0] -= (arr1[2] * arr2[1])
# # outptr[1] = (arr1[2] * arr2[0])
# outptr[1] -= (arr1[0] * arr2[2])
# # outptr[2] = (arr1[0] * arr2[1])
# outptr[2] -= (arr1[1] * arr2[0])
# return outarr
cdef double[::1] marr= np.array([0.0,0.0,0.0],dtype=np.float64)
cdef double* m = &marr[0]
cdef double[::1] basevalarr= np.array([0.0,0.0,0.0],dtype=np.float64)
cdef double* baseval = &basevalarr[0]
c1 = np.array([12.45,610.34,74.10],dtype=np.float64)
c2 = np.array([80.45,12.34,56.78],dtype=np.float64)
cdef double[::1] p21 = c2 - c1
cdef double* c21ptr = &p21[0]
cdef double[::1] c2p1harr = (c2 + c1)/2.0
cdef double* c2p1h = &c2p1harr[0]
cdef double[::1] outarr= np.array([0.0,0.0,0.0],dtype=np.float64)
cdef double* outptr = &outarr[0]
# def def_c21(double[:] c21):
# global
@cython.boundscheck(False)
@cython.cdivision(True)
@cython.wraparound(False)
def update_c(double[::1] c1,double[::1] c2):
c2p1h[0] = (c2[0] + c1[0])/2.0
c2p1h[1] = (c2[1] + c1[1])/2.0
c2p1h[2] = (c2[2] + c1[2])/2.0
c21ptr[0] = c2[0] - c1[0]
c21ptr[1] = c2[1] - c1[1]
c21ptr[2] = c2[2] - c1[2]
@cython.boundscheck(False)
@cython.cdivision(True)
@cython.wraparound(False)
cdef void crossm(double* arr1,double* arr2):
"""returns a pointer doesnt make sense. why ?
--> pointer points to object in local scope
--> can pass to another function which now points to this memory"""
global m
# cdef:
# double[::1] outarr = np.array([0.0,0.0,0.0],dtype=np.float64) #local object closed on function exit hence pointer points to garbage
# # double[::1] outarr = np.array([(arr1[1] * arr2[2]),(arr1[2] * arr2[0]),(arr1[0] * arr2[1])],dtype=np.float64)
# double* outptr = &outarr[0]
# outptr[0] = (arr1[1] * arr2[2])
m[0] = (arr1[1] * arr2[2]) - (arr1[2] * arr2[1])
# outptr[1] = (arr1[2] * arr2[0])
m[1] = (arr1[2] * arr2[0])-(arr1[0] * arr2[2])
# outptr[2] = (arr1[0] * arr2[1])
m[2] = (arr1[0] * arr2[1])-(arr1[1] * arr2[0])
# return outptr
@cython.boundscheck(False)
@cython.cdivision(True)
@cython.wraparound(False)
cdef void crossbv(double* arr1):
"""returns a pointer doesnt make sense. why ?
--> pointer points to object in local scope
--> can pass to another function which now points to this memory"""
global baseval
# cdef:
# double[::1] outarr = np.array([0.0,0.0,0.0],dtype=np.float64) #local object closed on function exit hence pointer points to garbage
# # double[::1] outarr = np.array([(arr1[1] * arr2[2]),(arr1[2] * arr2[0]),(arr1[0] * arr2[1])],dtype=np.float64)
# double* outptr = &outarr[0]
# outptr[0] = (arr1[1] * arr2[2])
baseval[0] = (arr1[1] * m[2]) - (arr1[2] * m[1])
# outptr[1] = (arr1[2] * arr2[0])
baseval[1] = (arr1[2] * m[0])-(arr1[0] * m[2])
# outptr[2] = (arr1[0] * arr2[1])
baseval[2] = (arr1[0] * m[1])-(arr1[1] * m[0])
# return outptr
# cdef double[::1] crossmv(double* arr1,double* arr2):
# cdef:
# double[::1] outarr = np.array([(arr1[1] * arr2[2]),(arr1[2] * arr2[0]),(arr1[0] * arr2[1])],dtype=np.float64)
# double* outptr = &outarr[0]
# # outptr[0] = (arr1[1] * arr2[2])
# outptr[0] -= (arr1[2] * arr2[1])
# # outptr[1] = (arr1[2] * arr2[0])
# outptr[1] -= (arr1[0] * arr2[2])
# # outptr[2] = (arr1[0] * arr2[1])
# outptr[2] -= (arr1[1] * arr2[0])
# return outarr
@cython.boundscheck(False)
@cython.cdivision(True)
@cython.wraparound(False)
cdef void crossc(double* arr1,double* arr2):
"""returns a pointer doesnt make sense. why ?
--> pointer points to object in local scope
--> can pass to another function which now points to this memory"""
global m,baseval
# cdef:
# double[::1] outarr = np.array([0.0,0.0,0.0],dtype=np.float64) #local object closed on function exit hence pointer points to garbage
# # double[::1] outarr = np.array([(arr1[1] * arr2[2]),(arr1[2] * arr2[0]),(arr1[0] * arr2[1])],dtype=np.float64)
# double* outptr = &outarr[0]
# outptr[0] = (arr1[1] * arr2[2])
m[0] = (arr1[1] * arr2[2]) - (arr1[2] * arr2[1])
# outptr[1] = (arr1[2] * arr2[0])
m[1] = (arr1[2] * arr2[0])-(arr1[0] * arr2[2])
# outptr[2] = (arr1[0] * arr2[1])
m[2] = (arr1[0] * arr2[1])-(arr1[1] * arr2[0])
cdef double m2 = (m[0] * m[0]) + (m[1] * m[1]) + (m[2] * m[2])
baseval[0] = ((c21ptr[1] * m[2]) - (c21ptr[2] * m[1]))/m2
# outptr[1] = (arr1[2] * arr2[0])
baseval[1] = ((c21ptr[2] * m[0])-(c21ptr[0] * m[2]))/m2
# outptr[2] = (arr1[0] * arr2[1])
baseval[2] = ((c21ptr[0] * m[1])-(c21ptr[1] * m[0]))/m2
@cython.boundscheck(False)
@cython.cdivision(True)
@cython.wraparound(False)
cdef void cross(double* arr1,double* arr2):
"""returns a pointer doesnt make sense. why ?
--> pointer points to object in local scope
--> can pass to another function which now points to this memory"""
global m,outptr
m[0] = (arr1[1] * arr2[2]) - (arr1[2] * arr2[1])
m[1] = (arr1[2] * arr2[0])-(arr1[0] * arr2[2])
m[2] = (arr1[0] * arr2[1])-(arr1[1] * arr2[0])
cdef double m2 = (m[0] * m[0]) + (m[1] * m[1]) + (m[2] * m[2])
m[0] = ((c21ptr[1] * m[2]) - (c21ptr[2] * m[1]))/m2
# outptr[1] = (arr1[2] * arr2[0])
m[1] = ((c21ptr[2] * m[0])-(c21ptr[0] * m[2]))/m2
# outptr[2] = (arr1[0] * arr2[1])
m[2] = ((c21ptr[0] * m[1])-(c21ptr[1] * m[0]))/m2
cdef:
double lmda1 = (((m[0] * arr1[0]) + (m[1] * arr1[1]) + (m[2] * arr1[2])))/2.0
double lmda2 = (((m[0] * arr2[0]) + (m[1] * arr2[1]) + (m[2] * arr2[2])))/2.0
outptr[0] = c2p1h[0] + (arr2[0] * lmda1) + (arr1[0] * lmda2)
outptr[1] = c2p1h[1] + (arr2[1] * lmda1) + (arr1[1] * lmda2)
outptr[2] = c2p1h[2] + (arr2[2] * lmda1) + (arr1[2] * lmda2)
#fastest
@cython.boundscheck(False)
@cython.cdivision(True)
@cython.wraparound(False)
def calc3d(double[::1] u1ptr,double[::1] u2ptr):
crossc(&u2ptr[0],&u1ptr[0]) #update m and baseval
cdef:
# double m2 = (m[0] * m[0]) + (m[1] * m[1]) + (m[2] * m[2])
double lmda1 = ((baseval[0] * u2ptr[0]) + (baseval[1] * u2ptr[1]) + (baseval[2] * u2ptr[2]))#/(m2)
double lmda2 = ((baseval[0] * u1ptr[0]) + (baseval[1] * u1ptr[1]) + (baseval[2] * u1ptr[2]))#/(m2)
outptr[0] = c2p1h[0] + ((u1ptr[0] * lmda1) + (u2ptr[0] * lmda2))/2.0
outptr[1] = c2p1h[1] +((u1ptr[1] * lmda1) + (u2ptr[1] * lmda2))/2.0
outptr[2] = c2p1h[2] +((u1ptr[2] * lmda1) + (u2ptr[2] * lmda2))/2.0
return outarr
# not working. do not use
@cython.cdivision(True)
@cython.wraparound(False)
def mainrecvmv(double[::1] u1ptr,double[::1] u2ptr):
cross(&u2ptr[0],&u1ptr[0]) #update m and baseval
return outarr
# @cython.boundscheck(False)
# @cython.cdivision(True)
# @cython.wraparound(False)
# def mainrecv(double[::1] c2p1h,double[::1] u1,double[::1] u2):
# crossc(&u2[0],&u1[0]) #double* m
# # crossbv(&c2_1[0]) #double* baseval
# cdef:
# # double[::1] outarr = np.array([0.0,0.0,0.0],dtype=np.float64)
# double* outptr = &c2p1h[0]
# double m2 = (m[0] * m[0]) + (m[1] * m[1]) + (m[2] * m[2])
# double lmda1 = ((baseval[0] * u2[0]) + (baseval[1] * u2[1]) + (baseval[2] * u2[2]))/(m2)
# double lmda2 = ((baseval[0] * u1[0]) + (baseval[1] * u1[1]) + (baseval[2] * u1[2]))/(m2)
# # double[::1] q1 = cymult(u1,lmda1)
# # double[::1] q2 = cymult(u2,lmda2)
# for i in range(3):
# u1[i] = u1[i] * lmda1
# u2[i] = u2[i] * lmda2
# outptr[i] += ((u1[i] + u2[i])/2.0)
# # outptr[1] = c2p1h[1] + ((u1[1] + u2[1])/2.0)
# # outptr[2] = c2p1h[2] + ((u1[2] + u2[2])/2.0)
# # return outarr
# # outptr[0] = m[0]
# # outptr[1] = m[1]
# # outptr[2] = m[2]
# return c2p1h
# def mainrecv(double[::1] c2_1, double[::1] c2p1h,double[::1] u1,double[::1] u2):
# crossm(&u2[0],&u1[0]) #double* m
# crossbv(&c2_1[0]) #double* baseval
# cdef:
# # double[::1] outarr = np.array([0.0,0.0,0.0],dtype=np.float64)
# double* outptr = &c2_1[0]
# double m2 = (m[0] * m[0]) + (m[1] * m[1]) + (m[2] * m[2])
# double lmda1 = ((baseval[0] * u2[0]) + (baseval[1] * u2[1]) + (baseval[2] * u2[2]))/(m2)
# double lmda2 = ((baseval[0] * u1[0]) + (baseval[1] * u1[1]) + (baseval[2] * u1[2]))/(m2)
# # double[::1] q1 = cymult(u1,lmda1)
# # double[::1] q2 = cymult(u2,lmda2)
# for i in range(3):
# u1[i] = u1[i] * lmda1
# u2[i] = u2[i] * lmda2
# outptr[i] = c2p1h[i] + ((u1[i] + u2[i])/2.0)
# # outptr[1] = c2p1h[1] + ((u1[1] + u2[1])/2.0)
# # outptr[2] = c2p1h[2] + ((u1[2] + u2[2])/2.0)
# # return outarr
# # outptr[0] = m[0]
# # outptr[1] = m[1]
# # outptr[2] = m[2]
# return c2_1
# def mainrecvmv(double[::1] c2_1, double[::1] c2p1h,double[::1] u1,double[::1] u2):
# cdef:
# double[::1] outarr = np.array([0.0,0.0,0.0],dtype=np.float64)
# double* outptr = &outarr[0]
# double[::1] m = crossmv(&u2[0],&u1[0])
# double[::1] baseval = crossmv(&c2_1[0],&m[0])
# double m2 = (m[0] * m[0]) + (m[1] * m[1]) + (m[2] * m[2])
# double lmda1 = ((baseval[0] * u2[0]) + (baseval[1] * u2[1]) + (baseval[2] * u2[2]))/(m2)
# double lmda2 = ((baseval[0] * u1[0]) + (baseval[1] * u1[1]) + (baseval[2] * u1[2]))/(m2)
# for i in range(3):
# u1[i] = u1[i] * lmda1
# u2[i] = u2[i] * lmda2
# outptr[0] = c2p1h[0] + ((u1[0] + u2[0])/2.0)
# outptr[1] = c2p1h[1] + ((u1[1] + u2[1])/2.0)
# outptr[2] = c2p1h[2] + ((u1[2] + u2[2])/2.0)
# # return outarr
# # outptr[0] = m[0]
# # outptr[1] = m[1]
# # outptr[2] = m[2]
# return outarr