INI

If you have come here from Display then your journey's almost over. If not then have fun trying to figure out what's going on.

        So far on our journey through LRengine we've have not change the INI much.
       Now lets play with it!
         First let's double the Width and Height in the INI and run one of the old examples.
           You now have a resize the output. As long the Width and Height are proportional to
          the Scene_Size then you'll not lose any of the scene data
     
           Now let's change  
                  Initial_Frame=48
                  Final_Frame=72
          and run one of the old examples.
          You should have 24 output frames numbered named 48 to 72.
             As long as the difference between Initial_Frame and Final_Frame (render frame count)
           is as the same as the difference between SceneA1 and SceneA2(scene frame count)
            then you can number the output files the way ya like.
           This is great for adding an effect to the end of an animation.

  Now  there just two more variables left Force_Start & Force_Stop.
      They are like the Subset_Start_Frame, Subset_End_Frame of the INI.
       In fact if you use Force_Start you have to set Subset_Start_Frame, more on that latter.
       Force_Stop on the other hand will stop no matter what Subset_End_Frame is.
       But they are different, first Force_Start & Force_Stop only use integers and then they
      depend on the difference of SceneA1 and Scene A2 values for there actions.
       This works like this, if their difference is 24 (24 frame animation) that means
        Force_Start  and Force_Stop has to less than 24 and both has to greater than 0. 

        Let's try something using the Force.
         Edit the example you've already chosen add:
           #declare Force_Start=12;
          and run.  
         You got an error didn't you?  We forgot something.
          LRengine can calc the(scene frame count) but to have the (render frame count) correct
          we need this formula: (INI) Subset_Start_Frame = (INI) Initial_Frame+ (POV) Force_Start
            we have in the INI:
                Initial_Frame=48
                Final_Frame=72             
           we need to edit the INI again with
              Subset_Start_Frame =60;  60=48+12
           now run your example.
           You should get a 12 frame animation ranging from 60 to 72 that is a subset of the 24 frames.
                 It is last half of the full animation.

          Comment out or delete Subset_Start_Frame from the INI
          Then let's edit your example:
                  Comment out or delete #declare Force_Start=12;
              #declare Force_Stop=12;
            run that
           You should get a 12 frame animation ranging from 48 to 60 that is a subset ot the 24 frames.
                          It is first half of the full animation.

             You CAN NOT use the INI statement Subset_End_Frame to do the same thing.
         The Subset_End_Frame statement changes the POV variable  final_frame that the engine uses
              to calculate animation frames and effects variables.

         You can use Subset_Start_Frame and Subset_End_Frame from the INI together if
           there difference is the same as the SceneA frame count.

       Why have this Force_Start & Stop you could ask.
     I use them mostly for testing an effect. But I'm sure you can think of some uses.

 I hope you liked our tour of the LRengine. Have Fun!