--- a/src/scene.h	Mon Nov 26 23:12:40 2007 +0100
+++ b/src/scene.h	Thu Nov 29 18:30:16 2007 +0100
@@ -24,6 +24,40 @@
 		o(ao), dir(adir) {};
 };
 
+class Quaternion
+{
+public:
+	float a,b,c,d;
+	Quaternion(): a(0), b(0), c(0), d(0) {};
+	Quaternion(const float aa, const float ab, const float ac, const float ad):
+		a(aa), b(ab), c(ac), d(ad) {};
+	Quaternion(const Vector3& v): a(1), b(v.x), c(v.y), d(v.z) {};
+
+	Vector3 toVector() { return Vector3(b/a, c/a, d/a); };
+
+	Quaternion normalize()
+	{
+		float f = 1.0f / sqrtf(a * a + b * b + c * c + d * d);
+		a *= f;
+		b *= f;
+		c *= f;
+		d *= f;
+		return *this;
+	};
+	friend Quaternion operator*(const Quaternion &q1, const Quaternion &q2)
+	{
+		return Quaternion(
+			q1.a*q2.a - q1.b*q2.b - q1.c*q2.c - q1.d*q2.d,
+			q1.a*q2.b + q1.b*q2.a + q1.c*q2.d - q1.d*q2.c,
+			q1.a*q2.c + q1.c*q2.a + q1.d*q2.b - q1.b*q2.d,
+			q1.a*q2.d + q1.d*q2.a + q1.b*q2.c - q1.c*q2.b);
+	};
+	friend Quaternion conjugate(const Quaternion &q)
+	{
+		return Quaternion(q.a, -q.b, -q.c, -q.d);
+	}
+};
+
 class Camera
 {
 public:
@@ -34,7 +68,9 @@
 	Camera(const Vector3 &C, const Vector3 &ap, const Vector3 &au, const Vector3 &av):
 		eye(C), p(ap), u(au), v(av), f(3.14/4.0) {};
 	void setEye(const Vector3 &aeye) { eye = aeye; };
-	void setFocusLength(const float af) { f = af; };
+	void setFocalLength(const float af) { f = af; };
+	void rotate(const Quaternion &q);
+	void move(const float fw, const float left, const float up);
 };
 
 /* axis-aligned bounding box */
@@ -90,8 +126,8 @@
 		texture.colour = acolour;
 		ambient = 0.1;
 		diffuse = 0.5;
-		specular = 1.0;
-		shininess = 20.0;
+		specular = 0.1;
+		shininess = 0.5;
 		reflection = 0.5;
 	}
 };