The cpdf_set_page_animation() function set the transition between following pages.
The value of transition can be
|0 for none,
|1 for two lines sweeping across the screen reveal the page,
|2 for multiple lines sweeping across the screen reveal the page,
|3 for a box reveals the page,
|4 for a single line sweeping across the screen reveals the page,
|5 for the old page dissolves to reveal the page,
|6 for the dissolve effect moves from one screen edge to another,
|7 for the old page is simply replaced by the new page (default)
The value of duration is the number of seconds between page flipping.