htrdr

commit d8a5a482768493a0d1d98494e5ceec33fb628712
parent 18e3e6b0f201ada4198a80a6d0685e0463e9fa52
Author: Vincent Forest <vincent.forest@meso-star.com>
Date:   Fri,  9 Dec 2022 16:08:02 +0100

planeto: add the htrdr_planeto_source_get_spectral_range function

Diffstat:
M
src/planeto/htrdr_planeto_source.c
 | 
29
+++++++++++++++++++++++++++++
M
src/planeto/htrdr_planeto_source.h
 | 
5
+++++

2 files changed, 34 insertions(+), 0 deletions(-)
diff --git a/src/planeto/htrdr_planeto_source.c b/src/planeto/htrdr_planeto_source.c
@@ -341,3 +341,32 @@ htrdr_planeto_source_is_targeted
 
   return d3_dot(dir, main_dir) >= cos(half_angle);
 }
+
+res_T
+htrdr_planeto_source_get_spectral_range
+  (const struct htrdr_planeto_source* source,
+   double range[2])
+{
+  res_T res = RES_OK;
+  ASSERT(source && range);
+
+  if(!source->per_wlen_radiances) {
+    range[0] = 0;
+    range[1] = INF;
+  } else {
+    struct sbuf_desc desc = SBUF_DESC_NULL;
+    const source_radiance_T* spectrum = NULL;
+
+    res = sbuf_get_desc(source->per_wlen_radiances, &desc);
+    if(res != RES_OK) goto error;
+
+    spectrum = desc.buffer;
+    range[0] = spectrum[0].wavelength;
+    range[1] = spectrum[desc.size-1].wavelength;
+  }
+
+exit:
+  return res;
+error:
+  goto exit;
+}
diff --git a/src/planeto/htrdr_planeto_source.h b/src/planeto/htrdr_planeto_source.h
@@ -67,4 +67,9 @@ htrdr_planeto_source_is_targeted
    const double pos[3], /* Ray origin */
    const double dir[3]);/* Ray direction */
 
+extern LOCAL_SYM res_T
+htrdr_planeto_source_get_spectral_range
+  (const struct htrdr_planeto_source* source,
+   double range[2]); /* In nm. Limits are inclusive */
+
 #endif /* HTRDR_PLANETO_SOURCE_H */