Added siye method for AABB

RayTracer/tools/AxisAlignedBoundingBox.cpp

@@ -127,6 +127,9 @@ bool AxisAlignedBoundingBox::partiallyContains(
 		if (contains(v)) return true;
 	return false;
 }
+float AxisAlignedBoundingBox::size() const {
+	return (maxBound() - minBound()).length();
+}
 Vec3 AxisAlignedBoundingBox::center() const {
 	return (max + min) / 2;
 }

RayTracer/tools/AxisAlignedBoundingBox.h

@@ -20,6 +20,7 @@ class AxisAlignedBoundingBox {
 	bool contains(const Vec3& v) const;
 	bool contains(const AxisAlignedBoundingBox& bb) const;
 	bool partiallyContains(const AxisAlignedBoundingBox& bb) const;
+	float size() const;
 	Vec3 center() const;
 	Vec3 minBound() const;
 	Vec3 maxBound() const;