Refactor: move hitlist, object, sphere, viewport into single files.

Add bias_ctx for setting sub-pixel sampling bias.

1 files changed, 41 insertions, 0 deletions

diff --git a/object.h b/object.h
new file mode 100644
index 0000000..b6e2bbd
--- /dev/null
+++ b/object.h
@@ -0,0 +1,41 @@
+//
+// Created by Keuin on 2022/4/12.
+//
+
+#ifndef RT_OBJECT_H
+#define RT_OBJECT_H
+
+#include "hitlist.h"
+#include "viewport.h"
+#include "timer.h"
+#include "bitmap.h"
+#include "ray.h"
+#include "vec.h"
+#include <cstdlib>
+#include <memory>
+#include <limits>
+#include <vector>
+#include <iostream>
+#include <cstdint>
+
+class object {
+public:
+    // Will the given ray hit. Returns time t if hits in range [t1, t2].
+    virtual bool hit(const ray3d &r, double &t, double t1, double t2) const = 0;
+
+    // With t2 = infinity
+    inline bool hit(const ray3d &r, double &t, double t1) const {
+        return hit(r, t, t1, std::numeric_limits<double>::infinity());
+    }
+
+    // Given a point on the surface, returns the normalized outer normal vector on that point.
+    virtual vec3d normal_vector(const vec3d &where) const = 0;
+
+    // object color, currently not parameterized
+    virtual pixel8b color() const = 0;
+
+    // subclasses must have virtual destructors
+    virtual ~object() = default;
+};
+
+#endif //RT_OBJECT_H