1mlib_VolumeRayCast_Blocked(m3eMdLiIaBL)ib Library Funmcltiibo_nVsolumeRayCast_Blocked(3MLIB)
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NAME

6       mlib_VolumeRayCast_Blocked,   mlib_VolumeRayCast_Blocked_Parallel_Near‐
7       est_U8_U8,         mlib_VolumeRayCast_Blocked_Parallel_Nearest_S16_S16,
8       mlib_VolumeRayCast_Blocked_Parallel_Trilinear_U8_U8,    mlib_VolumeRay‐
9       Cast_Blocked_Parallel_Trilinear_S16_S16,                mlib_VolumeRay‐
10       Cast_Blocked_Divergent_Nearest_U8_U8, mlib_VolumeRayCast_Blocked_Diver‐
11       gent_Nearest_S16_S16,      mlib_VolumeRayCast_Blocked_Divergent_Trilin‐
12       ear_U8_U8,   mlib_VolumeRayCast_Blocked_Divergent_Trilinear_S16_S16   -
13       cast a ray (or rays) through a 3D data set
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SYNOPSIS

16       cc [ flag... ] file... -lmlib [ library... ]
17       #include <mlib.h>
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20       mlib_status mlib_VolumeRayCast_Blocked_Parallel_Nearest_U8_U8
21            (mlib_rays *rays, const mlib_blkvolume *blk, void *buffer);
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24       mlib_status mlib_VolumeRayCast_Blocked_Parallel_Nearest_S16_S16
25            (mlib_rays *rays, const mlib_blkvolume *blk, void *buffer);
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28       mlib_status mlib_VolumeRayCast_Blocked_Parallel_Trilinear_U8_U8
29            (mlib_rays *rays, const mlib_blkvolume *blk, void *buffer);
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32       mlib_status mlib_VolumeRayCast_Blocked_Parallel_Trilinear_S16_S16
33            (mlib_rays *rays  const mlib_blkvolume *blk, void *buffer);
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36       mlib_status mlib_VolumeRayCast_Blocked_Divergent_Nearest_U8_U8
37            (mlib_rays *rays, const mlib_blkvolume *blk, void *buffer);
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40       mlib_status mlib_VolumeRayCast_Blocked_Divergent_Nearest_S16_S16
41            (mlib_rays *rays, const mlib_blkvolume *blk, void *buffer);
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44       mlib_status mlib_VolumeRayCast_Blocked_Divergent_Trilinear_U8_U8
45            (mlib_rays *rays, const mlib_blkvolume *blk, void *buffer);
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48       mlib_status mlib_VolumeRayCast_Blocked_Divergent_Trilinear_S16_S16
49            (mlib_rays *rays, const mlib_blkvolume *blk, void *buffer);
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DESCRIPTION

53       Each of these functions casts a ray (or rays)  through  a  three-dimen‐
54       sional  (3D)  data set, then computes and returns the interpolated sam‐
55       ples at each step along the way.
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58       In trilinear interpolation, the value at point P is computed  from  its
59       eight surrounding neighbors based on the equation below.
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61         P = (1-a)*(1-b)*(1-c)*P0 +
62             a*(1-b)*(1-c)*Px + (1-a)*b*(1-c)*Py + (1-a)*(1-b)*c*Pz +
63             a*b*(1-c)*Pxy + a*(1-b)*c*Pxz + (1-a)*b*c*Pyz +
64             a*b*c*Pxyz
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68       where  a, b, and c are the fractional parts of the coordinates of point
69       P.
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72       The trilinear interpolation is represented by the following figure:
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74       Printed copy or docs.sun.com displays a figure that represents the tri‐
75       linear interpolation.
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78       In  nearest neighbor operation, the sample value at point P is replaced
79       by the value of the nearest neighbor voxel.
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PARAMETERS

82       Each of the functions takes the following arguments:
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84       rays      Casting rays.
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87       blk       Volume data in the blocked format.
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90       buffer    Working buffer.
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RETURN VALUES

94       Each of the functions returns MLIB_SUCCESS if successful. Otherwise  it
95       returns MLIB_FAILURE.
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ATTRIBUTES

98       See attributes(5) for descriptions of the following attributes:
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103       ┌─────────────────────────────┬─────────────────────────────┐
104       │      ATTRIBUTE TYPE         │      ATTRIBUTE VALUE        │
105       ├─────────────────────────────┼─────────────────────────────┤
106       │Interface Stability          │Committed                    │
107       ├─────────────────────────────┼─────────────────────────────┤
108       │MT-Level                     │MT-Safe                      │
109       └─────────────────────────────┴─────────────────────────────┘
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SEE ALSO

112       mlib_VolumeRayCast_General(3MLIB), attributes(5)
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116SunOS 5.11                        2 Mar 2007 mlib_VolumeRayCast_Blocked(3MLIB)
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