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<h1>RSL_get_next_cwise_ray</h1>
<h1>RSL_get_next_ccwise_ray</h1>
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<h3>Synopsis</h3>
<b>#include "rsl.h"</b> <br>
<b><b><a href=RSL_ray_struct.html>Ray</a> *RSL_get_next_cwise_ray</b><b>(<a href=RSL_sweep_struct.html>Sweep</a> *s, <a href=RSL_ray_struct.html>Ray</a> *r);</b></b><br>
<b><a href=RSL_ray_struct.html>Ray</a> *RSL_get_next_ccwise_ray</b><b>(<a href=RSL_sweep_struct.html>Sweep</a> *s, <a href=RSL_ray_struct.html>Ray</a> *r);</b>
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<hr>Description</h3>
<b>cwise</b>, means clockwise and it is defined to mean "in the direction of increasing azimuth angle (don't ask)." <b>ccwise</b> means counter-clockwise and it is defined to mean "in the direction of decreasing azimuth angle." Dennis Flanigan defined <b>cwise</b> and <b>ccwise</b>.
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<h3>Return value</h3>
Upon successful completion, a pointer to the Ray structure is returned. Otherwise, a NULL pointer is returned.
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<h3>See also</h3>
<a href=RSL_get_ray_from_sweep.html>RSL_get_ray_from_sweep</a>, <a href=RSL_get_ray_above-below.html>RSL_get_ray_above</a>, <a href=RSL_get_ray_above-below.html>RSL_get_ray_below</a>, <a href=RSL_get_first_ray_of.html>RSL_get_first_ray_of_sweep</a>, <a href=RSL_get_first_ray_of.html>RSL_get_first_ray_of_volume</a>.
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<p>Author: <a href=john.merritt.html>John H. Merritt</a>
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