access model view matrix??

OpenGL doesn't grant you access to the memory of its internal matrix stacks. You can alter the stacks indirectly with the transformation routines, and you can ask for a copy of the current matrices. So, if you alter any matrix by indexed access it must be a matrix owned by yourself and OpenGL isn't concerned (until you use the matrix as argument to a OpenGL routine, in which case OpenGL makes a copy).

You can, of course, set the translation by hand into a matrix (as you can assemble any other senseful matrix by hand). Just consider two rules: (1) Guarantee that all 16 scalars are validly set (e.g., as you've suggested, initialize the matrix as an identity matrix before setting the translation), and (2) take into account that matrix multiplication isn't commutative. Else the results on screen will not be what you expected.

Whether the matrix plays the role of a projection, view transformation, or model transformation (or something else) doesn't matter in this sense. But you have to consider that assembling view matrices from a camera is the inverse process of assembling model matrices. Always look first on the total mathematical process before applying any optimization.

[Edited by - haegarr on October 10, 2006 3:05:34 AM]

Okay.

that help a lot, in some places in the code. :-)

Thants.