htrdr

commit 9f0fca34a1281dc54521c04c852c940f48601da0
parent 9f5c9931da292ee10b49c04a18686db904d7e47d
Author: Vincent Forest <vincent.forest@meso-star.com>
Date:   Wed, 23 Nov 2022 17:40:38 +0100

Add minor comments

Diffstat:
M
src/core/htrdr_ran_wlen_planck.c
 | 
7
+++++--
M
src/planeto/htrdr_planeto_compute_radiance.c
 | 
2
+-

2 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/src/core/htrdr_ran_wlen_planck.c b/src/core/htrdr_ran_wlen_planck.c
@@ -196,11 +196,14 @@ wlen_ran_sample_continue
   }
 
   if(pdf) {
-    const double Tref = planck->ref_temperature;
+    const double Tref = planck->ref_temperature; /* K */
+
+    /* W/m²/sr/m */
     const double B_lambda = htrdr_planck(lambda_m, lambda_m, Tref);
     const double B_mean = htrdr_planck(range_m[0], range_m[1], Tref);
+
     *pdf = B_lambda / (B_mean * (range_m[1]-range_m[0]));
-    *pdf *= 1.e-9; /* Transform from m^-1 to nm^-1 */
+    *pdf *= 1.e-9; /* Transform from m⁻¹ to nm⁻¹ */
   }
 
   return lambda_m * 1.e9; /* Convert in nanometers */
diff --git a/src/planeto/htrdr_planeto_compute_radiance.c b/src/planeto/htrdr_planeto_compute_radiance.c
@@ -604,7 +604,7 @@ planeto_compute_radiance
   longwave = cmd->spectral_domain.spectral_type == HTRDR_SPECTRAL_LW;
 
   if(!longwave && htrdr_planeto_source_is_targeted(cmd->source, pos, dir)) {
-    L = direct_contribution(cmd, args, pos, dir, NULL);
+    L = direct_contribution(cmd, args, pos, dir, NULL); /* In W/m²/sr/m */
   }
 
   for(;;) {