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Text File  |  2001-12-07  |  1.4 KB  |  27 lines
  1. // Relative corner to absolute corner - Version 1.1
  2.  
  3. // After tracking, corner pin points are created relative to a changing
  4. // position for the layer. This script subtracts off the position changes
  5. // so that only corner points are moving, making the motion easier to edit.
  6.  
  7. // To use, place the layer which was pinned in popup 1.
  8.  
  9. //      LAYER                                                                 PROPERTY                     CHANNEL
  10. //      ------                                                                ----------                     --------
  11. // 1: Layer with corner pin points applied by tracker   doesn't matter               doesn't matter
  12. // 2: doesn't matter                                                    doesn't matter               doesn't matter
  13.  
  14. if (time() == start_time) {
  15.     init_pos = value(pop_layer(1), position);
  16.  
  17. } else {
  18.     delta_pos = value(pop_layer(1), position) - init_pos;
  19.     
  20.     value(pop_layer(1), position) = init_pos;
  21.  
  22.   // assumes that corner pin is the first effect applied to the layer
  23.     effect_value(pop_layer(1), 0, 1) = effect_value(pop_layer(1), 0, 1) + delta_pos;
  24.     effect_value(pop_layer(1), 0, 2) = effect_value(pop_layer(1), 0, 2) + delta_pos;
  25.     effect_value(pop_layer(1), 0, 3) = effect_value(pop_layer(1), 0, 3) + delta_pos;
  26.     effect_value(pop_layer(1), 0, 4) = effect_value(pop_layer(1), 0, 4) + delta_pos;
  27. }