1 files changed, 38 insertions, 0 deletions
diff --git a/world.h b/world.h
new file mode 100644
index 0000000..4e01bcf
--- /dev/null
+++ b/world.h
@@ -0,0 +1,38 @@
+#ifndef WORLD_H
+#define WORLD_H
+
+#include "sphere.h"
+
+#include <limits>
+#include <optional>
+#include <tuple>
+#include <vector>
+
+struct World
+{
+    std::vector<Sphere> objects;
+
+    void add(auto&&... args) {
+        objects.emplace_back(args...);
+    }
+
+    std::optional<std::pair<double, Sphere>> hit(const ray& r) const {
+        double closest = std::numeric_limits<double>::infinity();
+        Sphere sphere;
+
+        for (const auto& o : objects) {
+            if (auto t = o.hit(r, 0.001, closest); t) {
+                closest = *t;
+                sphere = o;
+            }
+        }
+
+        if (closest != std::numeric_limits<double>::infinity())
+            return std::pair {closest, sphere};
+        else
+            return {};
+    }
+};
+
+#endif // WORLD_H
+