Raichur has a rich history, having been a part of various empires, such as the Bahmanis and Vijayanagara and Hyderabad.The city is famous for its imposing Raichur Fort. Here, stone inscriptions have been found in Persian and Arabic which belonged to the bastion of the fort, referring to its construction in 1294.
A common way to check if a point is in a triangle is to find the vectors connecting the point to each of the triangle's three vertices and sum the angles between those vectors. If the sum of the angles is 2*pi then the point is inside the triangle, otherwise it is not. It works, but it is very slow. This text explains a faster and much easier method.