Principles of functioning

Slides are shown one after the other, in the order in which they appear in the timeline.
The following diagram symbolizes the principles of functioning of slides:


The slides


On the high part of the diagram are represented slides A, B, C and D.
The slides which do not define background, use the background defined in a previous slide. So in the following example:
The same principle is applied to the musical playlists. As long as slides do not define new playlist, they use the last defined playlist.

Shots and blocks


The low part of the diagram represents the slide C.
Remarks:
Concretely, if in the foreground, a photo occupies all the screen, then occupies only a small part of the screen in the following shot, then the animation will consist of the transformation of the photo of all the screen (previous shot) towards the small part of the screen (following shot).

  Example:

Remarks:

The definition of the objects of every block can vary from a shot to the other one: In the following example, are represented three different definitions from the same block:

If we apply these definitions like the previous 3 shots:
Remarks:

The "Visible" property of blocks and the management of the breaks

Blocks have a visible or invisible property. In the following example, the image is 3 times inserted (in 3 blocks) into the same slide.
  • The first defined block the whole image filling all the screen
  • The second defined block the image re-framed on the statue and positioned in the form of ellipse in the right part of the screen
  • The third defined block the image re-framed on the walkers and positioned also in the form of ellipse in the right part of the screen

The statue and the walkers have their property positioned on invisible on the 1st shot.
Then the statue becomes visible on the 2nd shot.
Finally, the statue becomes again invisible on the 3rd shot and the walkers become visible.

Result :
  • During 2 seconds, the 1st shot is shown and we see only the whole image which occupies all the screen
  • The second 2 following ones, the statue appears
  • The next 2 seconds, the statue is replaced by the walkers
This example is really very simple, because it is also possible to liven up the appearance and the disappearance of blocks.
Indeed, as evoked previously, the animations of shots are generated by the transformation of the organizations from a shot to the other one.
So, if on the 1st shot, the statue occupied the left lower small quarter of the screen instead of the same position as on the 2nd shot, then instead of appearing simply during 2 seconds on the 2nd shot, it would appear by getting bigger since the left lower small quarter of the screen.

To note that in the case of videos, these are put in break when they are invisible.
So, a video can be display during some seconds in a 1st plan, then be set invisible and thus in break in a 2nd shot, then be visible on 3rd shot and resume its displaying, there where it had stayed in the end of the 1st shot.

Remark:

The total duration of the project is not equal to the sum of the slides durations because the transitions make that slides overlap: Two slides of 10 seconds with each a transition of 1 second will give a total duration for the project of 19 seconds (and not of 20 seconds)!

See also



ffDiaporama 1.0 - July 2011