64 

    65 void Container::addShape(Shape* aShape)

    66 {

    67 	shapes.push_back(aShape);

    68 	if (shapes.size() == 0) {

    69 		/* initialize bounding box */

    70 		bbox = aShape->get_bbox();

    71 	} else {

    72 		/* adjust bounding box */

    73 		BBox shapebb = aShape->get_bbox();

    74 		if (shapebb.L.x < bbox.L.x)  bbox.L.x = shapebb.L.x;

    75 		if (shapebb.L.y < bbox.L.y)  bbox.L.y = shapebb.L.y;

    76 		if (shapebb.L.z < bbox.L.z)  bbox.L.z = shapebb.L.z;

    77 		if (shapebb.H.x > bbox.H.x)  bbox.H.x = shapebb.H.x;

    78 		if (shapebb.H.y > bbox.H.y)  bbox.H.y = shapebb.H.y;

    79 		if (shapebb.H.z > bbox.H.z)  bbox.H.z = shapebb.H.z;

    80 	}

    81 };

    82 

    83 Shape *Container::nearest_intersection(const Shape *origin_shape, const Ray &ray,

    84 	Float &nearest_distance)

    85 {

    86 	Shape *nearest_shape = NULL;

    87 	ShapeList::iterator shape;

    88 	for (shape = shapes.begin(); shape != shapes.end(); shape++)

    89 		if (*shape != origin_shape && (*shape)->intersect(ray, nearest_distance))

    90 			nearest_shape = *shape;

    91 	return nearest_shape;

    92 }