Implemented BoundingVolumes Group.

RayTracer/shape/Group.cpp

@@ -37,7 +37,18 @@ std::shared_ptr<cam::Hit> Group::intersect(const cam::Ray& r) const {
 	}
 	return result;
 }
+util::AxisAlignedBoundingBox Group::bounds() const {
+	return util::AxisAlignedBoundingBox();
+}
 void Group::add(const std::shared_ptr<Shape>& shape) {
 	shapeList.push_back(shape);
 }
+void Group::rebuildBoundingVolume() {
+	util::AxisAlignedBoundingBox bb = shapeList[0]->bounds();
+	for (auto shape_bb : shapeList) {
+		bb = bb + shape_bb->bounds();
+	}
+	boundingVolume = bb;
+}
+
 }  // namespace shapes
\ No newline at end of file

RayTracer/shape/Group.h

@@ -13,10 +13,14 @@ class Group : public Shape {
 	Group(const util::Mat4& matrix);
 
 	std::shared_ptr<cam::Hit> intersect(const cam::Ray& r) const override;
+	util::AxisAlignedBoundingBox bounds() const override;
 	// protected:TODO
 	void add(const std::shared_ptr<shapes::Shape>& shape);
 
    private:
+	void rebuildBoundingVolume();
+
+	util::AxisAlignedBoundingBox boundingVolume;
 	std::vector<std::shared_ptr<Shape>> shapeList;
 	util::Transformation transform;
 };