38 lines
1.0 KiB
C++
38 lines
1.0 KiB
C++
#include "timeline.h"
|
|
|
|
TimelineBlock::TimelineBlock() :
|
|
current_block_(nullptr)
|
|
{
|
|
}
|
|
|
|
void TimelineBlock::Process(const rational &time)
|
|
{
|
|
// Run default process function
|
|
Block::Process(time);
|
|
|
|
// This node represents the end of the timeline, so if the time is beyond its start, there's no image to display
|
|
if (time >= in()) {
|
|
texture_output_->set_value(0);
|
|
current_block_ = nullptr;
|
|
return;
|
|
}
|
|
|
|
// If we're here, we need to find the current clip to display
|
|
if (current_block_ == nullptr) {
|
|
current_block_ = this;
|
|
}
|
|
|
|
// If the time requested is an earlier Block, traverse earlier until we find it
|
|
while (time < current_block_->in()) {
|
|
current_block_ = current_block_->previous();
|
|
}
|
|
|
|
// If the time requested is in a later Block, traverse later
|
|
while (time > current_block_->out()) {
|
|
current_block_ = current_block_->next();
|
|
}
|
|
|
|
// At this point, we must have found the correct block so we use its texture output to produce the image
|
|
current_block_->texture_output()->get_value(time);
|
|
}
|