1 files changed, 11 insertions, 0 deletions
diff --git a/test/raytracer/intersect.h b/test/raytracer/intersect.h
new file mode 100644
index 0000000..35241a6
--- /dev/null
+++ b/test/raytracer/intersect.h
@@ -0,0 +1,11 @@
+/* Return the closest base object intersecting the given ray, and
+   the curvilinear abscissa t of the intersection point.
+   Return NULL if no intersection.
+   Return t = 0.0 if the viewpoint (origin of the ray) is inside an
+   object. */
+
+struct object * intersect_ray(struct point * p,
+                              struct vector * v,
+                              struct object * obj,
+                              int initial,
+                              /*out*/ flt * t);