1 files changed, 33 insertions, 0 deletions
diff --git a/test/raytracer/light.h b/test/raytracer/light.h
new file mode 100644
index 0000000..9a1d3e2
--- /dev/null
+++ b/test/raytracer/light.h
@@ -0,0 +1,33 @@
+struct light {
+  enum { Directional, Pointlight, Spot } kind;
+  union {
+    struct {
+      struct point dir;
+      struct point col;
+    } directional;
+    struct {
+      struct point orig;
+      struct point col;
+    } point;
+    struct {
+      struct point orig;
+      struct point at;
+      struct point col;
+      flt cutoff, exponent;
+      struct vector unit;
+    } spot;
+  } u;
+};
+
+struct light * dirlight(struct point * dir, struct point * c);
+struct light * pointlight(struct point * orig, struct point * c);
+struct light * spotlight(struct point * pos, struct point * at,
+                         struct point * c, flt a, flt cutoff);
+
+void color_from_lights(struct object * obj,
+                       struct point * p,
+                       struct vector * v,
+                       struct vector * n,
+                       flt kd, flt ks, flt phong,
+                       struct light ** lights,
+                       /*out*/ struct point * il);