Add light module

src/SConscript

@@ -6,6 +6,7 @@ Import('env')
 
 files = Split("""
     basics.cc
+    light.cc
     object.cc
     object_sphere.cc
     scene.cc

src/light.cc

@@ -0,0 +1,46 @@
+/* light.cc
+ *
+ * Lights light the scene.
+ *
+ * Eryn Wells <eryn@erynwells.me>
+ */
+
+#include "basics.h"
+#include "light.h"
+#include "object.h"
+
+
+Light::Light()
+    : Light(1.0)
+{ }
+
+
+Light::Light(float i)
+    : Light(Vector3::Zero, i)
+{ }
+
+
+Light::Light(Vector3 o, float i)
+    : Object(o),
+      intensity(i)
+{ }
+
+
+/*
+ * Light::get_intensity --
+ * Light::set_intensity --
+ *
+ * Get and set the intensity of this light.
+ */
+float
+Light::get_intensity()
+    const
+{
+    return intensity;
+}
+
+void
+Light::set_intensity(float i)
+{
+    intensity = i;
+}

src/light.h

@@ -0,0 +1,29 @@
+/* light.h
+ *
+ * Lights light the scene.
+ *
+ * Eryn Wells <eryn@erynwells.me>
+ */
+
+#ifndef __LIGHT_H__
+#define __LIGHT_H__
+
+#include "object.h"
+
+
+class Light
+    : public Object
+{
+public:
+    Light();
+    Light(float i);
+    Light(Vector3 o, float i);
+
+    float get_intensity() const;
+    void set_intensity(float i);
+
+private:
+    float intensity;
+};
+
+#endif