From 30104d8ee20733cf4e2195ef9a6cd202a7a257e5 Mon Sep 17 00:00:00 2001
From: Arun Isaac
Date: Tue, 16 Mar 2021 15:01:45 +0530
Subject: Deal in solid angle fractions, not absolute solid angles.

* src/extent-sampling.sc (volume-cone): Use
solid-angle-fraction->planar-angle instead of
solid-angle->planar-angle.
* src/nd-random.sc (planar-angle->solid-angle): Rename to
planar-angle->solid-angle-fraction and return a solid angle fraction.
(solid-angle->planar-angle): Rename to
solid-angle-fraction->planar-angle and accept a solid angle fraction.
(hollow-cone-random-vector): Use planar-angle->solid-angle-fraction
instead of planar-angle->solid-angle.
(beta-inc-unnormalized, incomplete-wallis-integral): Delete functions.
* include/nd-random.h (planar_angle_to_solid_angle): Rename to
planar_angle_to_solid_angle_fraction.
(solid_angle_to_planar_angle): Rename to
solid_angle_fraction_to_planar_angle.
* scm/nsmc/wrap.scm (planar-angle->solid-angle): Rename to
planar-angle->solid-angle-fraction.
---
 include/nd-random.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'include')

diff --git a/include/nd-random.h b/include/nd-random.h
index 9755e57..3d3c298 100644
--- a/include/nd-random.h
+++ b/include/nd-random.h
@@ -30,7 +30,7 @@ void random_direction_vector (const gsl_rng* r, gsl_vector* x);
 void cone_random_vector (const gsl_rng* r, const gsl_vector* mean, double theta_max, gsl_vector* x);
 void hollow_cone_random_vector (const gsl_rng* r, const gsl_vector* mean, double theta_min, double theta_max, gsl_vector* x);
 
-double planar_angle_to_solid_angle (double planar_angle, unsigned int dimension);
-double solid_angle_to_planar_angle (double solid_angle, unsigned int dimension);
+double planar_angle_to_solid_angle_fraction (double planar_angle, unsigned int dimension);
+double solid_angle_fraction_to_planar_angle (double solid_angle, unsigned int dimension);
 
 #endif
-- 
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