star-gs

commit 7985740bc0e077494428ef1de1d2abd9f12fe81d
parent 6e99b8586a6dbc78ede4f64a901ac012a28bad0e
Author: Vincent Forest <vincent.forest@meso-star.com>
Date:   Mon, 26 Apr 2021 18:57:00 +0200

Add the sgs_geometry_trace_ray API function

Diffstat:
M
src/sgs_geometry.c
 | 
33
+++++++++++++++++++++++++++++++++
M
src/sgs_geometry.h
 | 
10
++++++++++

2 files changed, 43 insertions(+), 0 deletions(-)
diff --git a/src/sgs_geometry.c b/src/sgs_geometry.c
@@ -225,6 +225,39 @@ sgs_geometry_ref_put(struct sgs_geometry* geom)
   ref_put(&geom->ref, release_geometry);
 }
 
+void
+sgs_geometry_trace_ray
+  (const struct sgs_geometry* geom,
+   const double ray_org[3],
+   const double ray_dir[3],
+   const double ray_range[2],
+   const struct s3d_hit* hit_from,
+   struct s3d_hit* hit)
+{
+  struct hit_filter_context filter_ctx = HIT_FILTER_CONTEXT_NULL;
+  float org[3];
+  float dir[3];
+  float range[2];
+  ASSERT(geom && ray_org && ray_dir && ray_range && hit);
+
+  /* Convert ray data to single precision */
+  f3_set_d3(org, ray_org);
+  f3_set_d3(dir, ray_dir);
+  f2_set_d2(range, ray_range);
+
+  /* Ensure the normalization of the ray direction after its conversion to
+   * single precision */
+  f3_normalize(dir, dir);
+
+  /* Setup the hit filter data */
+  filter_ctx.range[0] = range[0];
+  filter_ctx.range[1] = range[1];
+  filter_ctx.hit_from = hit_from ? *hit_from : S3D_HIT_NULL;
+
+  /* Trace the ray */
+  S3D(scene_view_trace_ray(geom->view_rt, org, dir, range, &filter_ctx, hit));
+}
+
 res_T
 sgs_geometry_dump_vtk(const struct sgs_geometry* geom, FILE* stream)
 {
diff --git a/src/sgs_geometry.h b/src/sgs_geometry.h
@@ -115,6 +115,7 @@ static const struct sgs_geometry_step_args SGS_GEOMETRY_STEP_ARGS_DEFAULT =
   SGS_GEOMETRY_STEP_ARGS_DEFAULT__;
 
 /* Forward declaration */
+struct s3d_hit;
 struct sgs;
 struct sgs_geometry;
 
@@ -147,6 +148,15 @@ extern LOCAL_SYM void
 sgs_geometry_ref_put
   (struct sgs_geometry* geom);
 
+extern LOCAL_SYM void
+sgs_geometry_trace_ray
+  (const struct sgs_geometry* geom,
+   const double ray_org[3],
+   const double ray_dir[3],
+   const double ray_range[2],
+   const struct s3d_hit* hit_from, /* May be NULL */
+   struct s3d_hit* hit);
+
 extern LOCAL_SYM res_T
 sgs_geometry_dump_vtk
   (const struct sgs_geometry* geom,