Questions on animation of OpenGL

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C++

OpenGL

animation

Hi everyone, recently started messing around with animation in OpenGL, when writing a program arose 3 questions:
1) how to carry out the transformation of all the obtained values ​​in the cycle? that is, I have the program calculates the angles of rotation, but as I understand the transformation of rotation occurs only on the last corner of the resulting. tried to fight, putting himself in PostRedispla cycle call drawing functions in this cycle, but all in vain.
2) how can deny animation? This problem stems from 1) (the last corner shakes back and forth model) also tried to limit cycle, but all in vain
3) transformation again: suppose I need to animation models depicted deviation by a predetermined angle, but somehow with increasing angle values, respectively, and increases the speed of the animation, what the problem might be? If you need I will attach code