32 	Colour bg_colour;

    32 	Colour bg_colour;

    33 	int ao_samples;

    33 	int ao_samples;

    34 	Float ao_distance, ao_angle;

    34 	Float ao_distance, ao_angle;

    35 	int num_threads;

    35 	int num_threads;

    36 	int subsample;

    36 	int subsample;

    37 	int max_depth;

    38 	int max_depth;

    38 

    39 

    39 	Vector3 SphereDistribute(int i, int n, Float extent, Vector3 &normal);

    40 	Vector3 SphereDistribute(int i, int n, Float extent, Vector3 &normal);

    40 public:

    41 public:

    41 	Raytracer(): top(NULL), camera(NULL), lights(), bg_colour(0.0, 0.0, 0.0),

    42 	Raytracer(): top(NULL), camera(NULL), lights(), bg_colour(0.0, 0.0, 0.0),

    43 	void render(int w, int h, Float *buffer);

    44 	void render(int w, int h, Float *buffer);

    44 	Colour raytrace(Ray &ray, int depth, Shape *origin_shape);

    45 	Colour raytrace(Ray &ray, int depth, Shape *origin_shape);

    45 	void addshape(Shape *shape) { top->addShape(shape); };

    46 	void addshape(Shape *shape) { top->addShape(shape); };

    46 	void addlight(Light *light);

    47 	void addlight(Light *light);

    47 	void setCamera(Camera *cam) { camera = cam; };

    48 	void setCamera(Camera *cam) { camera = cam; };

    48 	void setTop(Container *atop) { top = atop; };

    49 	void setTop(Container *atop) { top = atop; };

    49 	Container *getTop() { return top; };

    50 	Container *getTop() { return top; };

    50 	int getSubsample() { return subsample; };

    52 	int getSubsample() { return subsample; };

    51 	void setMaxDepth(int newdepth) { max_depth = newdepth; };

    55 	void setMaxDepth(int newdepth) { max_depth = newdepth; };

    52 

    56 

    53 	void ambientocclusion(int samples, Float distance, Float angle);

    57 	void ambientocclusion(int samples, Float distance, Float angle);

    54 	void setThreads(int num) { num_threads = num; };

    58 	void setThreads(int num) { num_threads = num; };

    55 };

    59 };