Function glLoadIdentity

glLoadIdentity replaces the current matrix with the identity matrix. It is semantically equivalent to calling glLoadMatrix with the identity matrix

⎛1ㅤ0ㅤ0ㅤ0⎞

⎜0ㅤ1ㅤ0ㅤ0 ⎜

⎜0ㅤ0ㅤ1ㅤ0 ⎜

⎝0ㅤ0ㅤ0ㅤ1⎠

but in some cases it is more efficient.

Summary

replace the current matrix with the identity matrix

See

glLoadIdentity