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Polar View and Eye Vector

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Hi! I use polar view to control my camera. The code is this:
void polarView(GLfloat distance, GLfloat azimuth,
GLfloat incidence, GLfloat twist)
    glTranslatef(0.0, 0.0, -distance);
    glRotatef(-twist, 0.0, 0.0, 1.0);
    glRotatef(-incidence, 1.0, 0.0, 0.0);
    glRotatef(-azimuth, 0.0, 0.0, 1.0);
Can I calculate the eye vector? And if yes, how? Thanks!

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