Add object_sphere.h

src/object_sphere.h

@@ -0,0 +1,30 @@
+/* object_sphere.h
+ *
+ * Spheres are Shapes defined by a center point and a radius.
+ *
+ * Eryn Wells <eryn@erynwells.me>
+ */
+
+#ifndef __OBJECT_SPHERE_H__
+#define __OBJECT_SPHERE_H__
+
+#include "basics.h"
+#include "object.h"
+
+
+class Sphere
+    : public Shape
+{
+    Sphere();
+    Sphere(float r);
+    Sphere(Vector3 o, float r);
+
+    float get_radius();
+    void set_radius(float r);
+
+    int does_intersect(const Ray &ray, float **t);
+private:
+    float radius;
+};
+
+#endif