rngrd

commit e7275459ca0c03c57410e4cf23a1687b00875c05
parent 1fbc15f650cadeae12233771f95a8d10ba6fc2da
Author: Vincent Forest <vincent.forest@meso-star.com>
Date:   Tue, 27 Sep 2022 12:14:46 +0200

Add the rngrd_trace_ray function

Diffstat:
M
src/rngrd.h
 | 
12
+++++++++---
M
src/rngrd_mesh.c
 | 
40
++++++++++++++++++++++++++++++++++++++++

2 files changed, 49 insertions(+), 3 deletions(-)
diff --git a/src/rngrd.h b/src/rngrd.h
@@ -71,9 +71,9 @@ static const struct rngrd_create_args RNDGR_CREATE_ARGS_DEFAULT =
   RNGRD_CREATE_ARGS_DEFAULT__;
 
 struct rngrd_trace_ray_args {
-  double org[3]; /* Ray origin */
-  double dir[3]; /* Ray direction */
-  double range[2]; /* Ray range */
+  double ray_org[3]; /* Ray origin */
+  double ray_dir[3]; /* Ray direction */
+  double ray_range[2]; /* Ray range */
 
   /* Intersection from which the ray starts. Used to avoid self intersection */
   struct s3d_hit hit_from;
@@ -123,6 +123,12 @@ RNGRD_API res_T
 rngrd_validate
   (const struct rngrd* ground);
 
+RNGRD_API res_T
+rngrd_trace_ray
+  (const struct rngrd* ground,
+   struct rngrd_trace_ray_args* args,
+   struct s3d_hit* hit);
+
 END_DECLS
 
 #endif /* RNGRD_H */
diff --git a/src/rngrd_mesh.c b/src/rngrd_mesh.c
@@ -258,6 +258,46 @@ error:
 }
 
 /*******************************************************************************
+ * Exported functions
+ ******************************************************************************/
+res_T
+rngrd_trace_ray
+  (const struct rngrd* ground,
+   struct rngrd_trace_ray_args* args,
+   struct s3d_hit* hit)
+{
+  float org[3];
+  float dir[3];
+  float range[2];
+  res_T res = RES_OK;
+
+  if(!ground || !args || !hit) {
+    res = RES_BAD_ARG;
+    goto error;
+  }
+
+  f3_set_d3(org, args->ray_org);
+  f3_set_d3(dir, args->ray_dir);
+  f3_set_d3(range, args->ray_range);
+
+  *hit = S3D_HIT_NULL;
+
+  res = s3d_scene_view_trace_ray(ground->s3d_view, org, dir, range, args, hit);
+  if(res != RES_OK) {
+    log_err(ground,
+      "%s: error tracing ray "
+      "(origin = %g, %g, %g; direction = %g, %g ,%g; range = %g, %g)\n",
+      FUNC_NAME, SPLIT3(org), SPLIT3(dir), SPLIT2(range));
+    goto error;
+  }
+
+exit:
+  return res;
+error:
+  goto exit;
+}
+
+/*******************************************************************************
  * Local function
  ******************************************************************************/
 res_T