Original Post
Hey all, I guess this isn't strictly an OGL problem but I guess many of you will have experience of similar problems. Right now I've got an array of all the vertices within a given model. Now what I want to do is run an algorithm that will go thru the array and find any vertices that appear more than 3 times (with 3 different normals) and therefore will be required in drawing the correct shadow for the object. Right now the idea I was having was when the object data is being read is that each time it reads Vertex data it checks the current array to see if it features. But this requires looping thru every element of the array, for every vertex. This is extremely slow. Can anyone suggest a better way? Andy
