[Résolu] Appliquer une rotation sous Android

Bonjour
Voici comment appliquer une rotation sous Android:
public void onDrawFrame(GL10 gl) {
...
// Create a rotation for the triangle
// long time = SystemClock.uptimeMillis() % 4000L;
// float angle = 0.090f * ((int) time);
Matrix.setRotateM(mRotationMatrix, 0, mAngle, 0, 0, -1.0f);

// Combine the rotation matrix with the projection and camera view
Matrix.multiplyMM(mMVPMatrix, 0, mRotationMatrix, 0, mMVPMatrix, 0);

// Draw triangle
mTriangle.draw(mMVPMatrix);
}