Sorting vertices of the triangle by bubble sort and interpolate Z to draw each pixel with least Z

The .asc files contains vertices of the triangles with NormalX, NormalY, NormalZ, U and V values. Create a new renderer, initialize with default values. Sort the vertices by Y using bubble sort technique. Interpolate Z at each pixel and solve for Ax + By + Cz + D = 0. Compare Zpix with Zfb(framebuffer), lower value wins and write the same to framebuffer. Output can be seen in the ppm file