Method get_transform

src/Clip.cpp:1450–1616

Get QTransform from keyframes

// Get QTransform from keyframes
QTransform Clip::get_transform(std::shared_ptr<Frame> frame, int width, int height)
{
	// Get image from clip
	std::shared_ptr<QImage> source_image = frame->GetImage();

	/* RESIZE SOURCE IMAGE - based on scale type */
	QSize source_size = scale_size(source_image->size(), scale, width, height);

	// Initialize parent object's properties (Clip or Tracked Object)
	float parentObject_location_x = 0.0;
	float parentObject_location_y = 0.0;
	float parentObject_scale_x = 1.0;
	float parentObject_scale_y = 1.0;
	float parentObject_shear_x = 0.0;
	float parentObject_shear_y = 0.0;
	float parentObject_rotation = 0.0;

	// Get the parentClipObject properties
	if (GetParentClip()){
        // Get the start trim position of the parent clip
        long parent_start_offset = parentClipObject->Start() * info.fps.ToDouble();
        long parent_frame_number = frame->number + parent_start_offset;

		// Get parent object's properties (Clip)
		parentObject_location_x = parentClipObject->location_x.GetValue(parent_frame_number);
		parentObject_location_y = parentClipObject->location_y.GetValue(parent_frame_number);
		parentObject_scale_x = parentClipObject->scale_x.GetValue(parent_frame_number);
		parentObject_scale_y = parentClipObject->scale_y.GetValue(parent_frame_number);
		parentObject_shear_x = parentClipObject->shear_x.GetValue(parent_frame_number);
		parentObject_shear_y = parentClipObject->shear_y.GetValue(parent_frame_number);
		parentObject_rotation = parentClipObject->rotation.GetValue(parent_frame_number);
	}

    // Get the parentTrackedObject properties
    if (GetParentTrackedObject()){
        // Get the attached object's parent clip's properties
        Clip* parentClip = (Clip*) parentTrackedObject->ParentClip();
        if (parentClip)
        {
            // Get the start trim position of the parent clip
            long parent_start_offset = parentClip->Start() * info.fps.ToDouble();
            long parent_frame_number = frame->number + parent_start_offset;

            // Access the parentTrackedObject's properties
            std::map<std::string, float> trackedObjectProperties = parentTrackedObject->GetBoxValues(parent_frame_number);

            // Get actual scaled parent size
            QSize parent_size = scale_size(QSize(parentClip->info.width, parentClip->info.height),
                                           parentClip->scale, width, height);

            // Get actual scaled tracked object size
            int trackedWidth = trackedObjectProperties["w"] * trackedObjectProperties["sx"] * parent_size.width() *
                    parentClip->scale_x.GetValue(parent_frame_number);
            int trackedHeight = trackedObjectProperties["h"] * trackedObjectProperties["sy"] * parent_size.height() *
                    parentClip->scale_y.GetValue(parent_frame_number);

            // Scale the clip source_size based on the actual tracked object size
            source_size = scale_size(source_size, scale, trackedWidth, trackedHeight);