htsky

commit be88d89dd938aaa2e56afd7f18577ec0a0aad77d
parent b8624878c2def4826afd1afd90c2a0d49908bdd3
Author: Vincent Forest <vincent.forest@meso-star.com>
Date:   Tue, 17 Mar 2020 10:22:02 +0100

Add the htsky_spectral_band_sample_quadrature function

Diffstat:
M
src/htsky.c
 | 
19
+++++++++++++++++++
M
src/htsky.h
 | 
7
+++++++

2 files changed, 26 insertions(+), 0 deletions(-)
diff --git a/src/htsky.c b/src/htsky.c
@@ -966,6 +966,25 @@ htsky_sample_sw_spectral_data_CIE_1931_Z
      ispectral_band, iquadrature_pt);
 }
 
+size_t
+htsky_spectral_band_sample_quadrature
+  (const struct htsky* sky,
+   const double r,
+   const size_t iband)
+{
+  struct htgop_spectral_interval band;
+  size_t iquad;
+  ASSERT(sky->bands_range[0] <= iband || iband <= sky->bands_range[1]);
+
+  if(sky->is_long_wave) {
+    HTGOP(get_lw_spectral_interval(sky->htgop, iband, &band));
+  } else {
+    HTGOP(get_sw_spectral_interval(sky->htgop, iband, &band));
+  }
+  HTGOP(spectral_interval_sample_quadrature(&band, r, &iquad));
+  return iquad;
+}
+
 /*******************************************************************************
  * Local functions
  ******************************************************************************/
diff --git a/src/htsky.h b/src/htsky.h
@@ -233,6 +233,13 @@ htsky_sample_sw_spectral_data_CIE_1931_Z
    size_t* ispectral_band,
    size_t* iquadrature_pt);
 
+/* Returned the sampled quadrature point */
+HTSKY_API size_t
+htsky_spectral_band_sample_quadrature
+  (const struct htsky* sky,
+   const double r, /* Random number in [0, 1[ */
+   const size_t ispectral_band);
+
 HTSKY_API res_T
 htsky_dump_cloud_vtk
   (const struct htsky* sky,