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program get_projection
implicit none
real x1,y1,z1
real x2,y2,z2
real x3,y3,z3
real x4,y4,z4
real theta
real dx1,dy1,dz1,dx2,dy2,dz2
real px1,py1,pz1,px2,py2,pz2
real r1,r2

! Çó»ù×¼ÖáAB
  dx1=x2-x1
  dy1=y2-y1
  dz1=z2-z1
!ÇóCDµÄÎ»ÒÆ£¨Ç°±£´æµÄ½á¹û£©
   dx2=x4-x3
  dy2=y4-y3
  dz2=z4-z3
!ÇóABºÍCDµÄÄ£
  r1=dx1**2+dy1**2+dz1**2
r2=dx2**2+dy2**2+dz2**2
£¡Óɵã³Ë¹«Ê½¼ÆËãABÓëCDËùÐγɵĽÇtheta
theta=acos ((dx1*dx2+dy1*dy2+dz1*dz2)/(sqrt(r1)*sqrt(r2)))
!¼ÆËãÑØAB»ù×¼Öá·½ÏòµÄÎ»ÒÆ
  px1=dx2*cos(theta)
  py1=dy2*cos(theta)
  pz1=dz2*cos(theta)
!ÑØ´¹Ö±ÓÚAB»ù×¼Öá·½ÏòµÄÎ»ÒÆ
  px2=dx2*sin(theta)
  py2=dy2*sin(theta)
  pz2=dz2*sin(theta)
end
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astringent(½ð±Ò+5): 2011-02-17 02:57:21
astringent(½ð±Ò+10): 2011-02-17 03:11:16
ÓàÔó³É(½ð±Ò+2): лл²ÎÓëÓ¦Öú£¬»¶Ó­³£À´³ÌÐòÓïÑ԰棡 2011-02-20 18:34:56
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" px1=dx2*cos(theta)
  py1=dy2*cos(theta)
  pz1=dz2*cos(theta)
!ÑØ´¹Ö±ÓÚAB»ù×¼Öá·½ÏòµÄÎ»ÒÆ
  px2=dx2*sin(theta)
  py2=dy2*sin(theta)
  pz2=dz2*sin(theta)
¡°

==¡·
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px1= dx1/sqrt(r1) * sqrt(r2) *cos(theta)
py1= dy1/sqrt(r1) * sqrt(r2) *cos(theta)
pz1= dz1/sqrt(r1) * sqrt(r2) *cos(theta)
!ÑØ´¹Ö±ÓÚAB»ù×¼Öá·½ÏòµÄÎ»ÒÆ
  px2=dx2-px1
  py2=dy2-py1
  pz2=dz2-pz1
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ÓàÔó³É(½ð±Ò+2): лл²ÎÓëÓ¦Öú£¡ 2011-01-21 13:28:24
astringent(½ð±Ò+5): 2011-01-22 05:27:21
ÒýÓûØÌû:
Originally posted by astringent at 2011-01-21 04:03:30:
ÓÐÁ½¸öµãA£¨x1,y1,z1£©,B£¨x2,y2,z2£©,ÏÖÔÚÒÔÓɵãAºÍBÈ·¶¨µÄÖ±ÏßΪ»ù×¼ÖᣬÎÒÏëÇóµÄÊǵ±ÒÔÎïÌåÓɵãC£¨x3,y3,z3£©Ô˶¯µ½µãD£¨x4,y4,z4£©Ê±£¬ÑØAB»ù×¼Öá·½ÏòµÄÎ»ÒÆÒÔ¼°ÑØ´¹Ö±ÓÚAB»ù×¼Öá·½ÏòµÄÎ»ÒÆ¡£ÎÒдÁËÒ»¸ö³ÌÐò£¬ ...

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2Â¥2011-01-21 09:12:14
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ÓàÔó³É(½ð±Ò+2): лл²ÎÓëÓ¦Öú£¬»¶Ó­³£À´³ÌÐòÓïÑ԰棡 2011-02-20 18:35:06
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