How do you get the eye postion from the Model Matrix... Model View Matrix: [0] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] Am i right in saying its the inverse of elements [3](x), [7](y) and [11](z) ?? Many Thanks Ross

Hi,

I resolved my dilemma by unprojecting the centre postion of the screen coordinates and using a really high z buffer value

gluUnProject(screenSizeX/2.0, screenSizeY/2.0, -100000, modelView, projection, viewport, &eyeVector.x, &eyeVector.y, &eyeVector.z);

Many Thanks

Ross