Recently I have studied the source code of pyrogenesis engine. And there're few confusing implementation. For example in the function "CPatchRData::BuildIndices" I can see indices in clockwise order - [0,0] -> [1,0] -> [0,1] -> [1,0] -> [1,1] -> [0,1]         for (ssize_t j = 0; j < PATCH_SIZE; j++)         {             for (ssize_t i = 0; i < PATCH_SIZE; i++)             {                 if (texgrid[j][i] == tex)                 {                     bool dir = terrain->GetTriangulationDir(px+i, pz+j);                     if (dir)                     {                         indices.push_back(u16(((j+0)*vsize+(i+0))+base));                         indices.push_back(u16(((j+0)*vsize+(i+1))+base));                         indices.push_back(u16(((j+1)*vsize+(i+0))+base));                           indices.push_back(u16(((j+0)*vsize+(i+1))+base));                         indices.push_back(u16(((j+1)*vsize+(i+1))+base));                         indices.push_back(u16(((j+1)*vsize+(i+0))+base));                     }                     else                     {                         indices.push_back(u16(((j+0)*vsize+(i+0))+base));                         indices.push_back(u16(((j+0)*vsize+(i+1))+base));                         indices.push_back(u16(((j+1)*vsize+(i+1))+base));                           indices.push_back(u16(((j+1)*vsize+(i+1))+base));                         indices.push_back(u16(((j+1)*vsize+(i+0))+base));                         indices.push_back(u16(((j+0)*vsize+(i+0))+base));                     }                 }             }         } However the default triangle winding of OpenGL is counter-clockwise. Anyway in the Atlas editor the terrain is stil visible with front faces up.  I wonder whether such implementation is rectified with projection matrix and orientation matrix, Or this is just my misunderstanding in some point? Hope that some expert can provide help. I really appreciate that!  

Probably because bots posted here before getting deleted...

There is controversy following messages from some Linux kernel developers encouraging the abandonment of support for older hardware.  

Why does this keep showing up in my feed?