With this function you supply the sequence element ID - as returned by layer_sequence_create() or by one of the layer element functions - and it will return the current playhead direction, which will be one of the constants listed below.
layer_sequence_get_headdir(sequence_element_id)
| Argument | Description |
|---|---|
| sequence_element_id | The unique ID value of the sequence element to target |
Constant
| Constant | Description | Value |
|---|---|---|
| seq_dir_right | The sequence is playing frames in an incremental order from left to right | 1 |
| seq_dir_left | The sequence is playing frames in a decremental order from right to left | -1 |
if layer_sequence_get_headdir(title_sequence) != seq_dir_left
{
layer_sequence_headdir(title_sequence, seq_dir_left);
}
The above code checks the the current playhead direction of the sequence element ID stored in the variable "title_sequence", and if it's not set to seq_dir_left, it is set to this value.