ggggllllLLLLooooaaaaddddIIIIddddeeeennnnttttiiiittttyyyy replaces the current matrix with the identity matrix. It
is semantically equivalent to calling ggggllllLLLLooooaaaaddddMMMMaaaattttrrrriiiixxxx with the identity
matrix
( )
1 0 0 0
| |
| 0 1 0 0 |
| |
0 0 1 0
| |
( 0 0 0 1 )
but in some cases it is more efficient.
EEEERRRRRRRROOOORRRRSSSS
GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____OOOOPPPPEEEERRRRAAAATTTTIIIIOOOONNNN is generated if ggggllllLLLLooooaaaaddddIIIIddddeeeennnnttttiiiittttyyyy is executed between
the execution of ggggllllBBBBeeeeggggiiiinnnn and the corresponding execution of ggggllllEEEEnnnndddd.