Modernize object_sphere

Rename files objectSphere. Clean up dependencies.

src/objectSphere.hh

@@ -0,0 +1,40 @@
+/* object_sphere.h
+ *
+ * Spheres are Shapes defined by a center point and a radius.
+ *
+ * Eryn Wells <eryn@erynwells.me>
+ */
+
+#ifndef __OBJECTSPHERE_HH__
+#define __OBJECTSPHERE_HH__
+
+#include "basics.h"
+#include "object.h"
+
+namespace charles {
+
+class Sphere
+    : public Object
+{
+public:
+    Sphere();
+    Sphere(Double r);
+    Sphere(Vector3 o, Double r);
+
+    Double GetRadius() const;
+    void SetRadius(Double r);
+
+    bool DoesIntersect(const Ray& ray, TVector& t, Stats& stats) const;
+    bool point_is_on_surface(const Vector3 &p) const;
+    Vector3 compute_normal(const Vector3 &p) const;
+
+    /** @see charles::Object::Write */
+    void Write(std::ostream& ost) const;
+
+private:
+    Double mRadius;
+};
+
+} /* namespace charles */
+
+#endif /* __OBJECTSPHERE_HH__ */