blender
/
blender
129
398
Fork 572
Code Issues 6.2k Pull Requests 746 Projects 19 Wiki Activity

Compositor: Expose track velocity via the Track Position node 

velocity is measured in pixels per frame. It is basically a coordinate
difference of track coordinate at current frame and previous one (no future
prediction happens).

It's not really most intuitive place for such a things, but historically the
node was called this way..

Track velocity could be used to face effects like motion blur bu piping it
to the vector blur node.

Reviewers: campbellbarton

Reviewed By: campbellbarton

Subscribers: hype, sebastian_k

Differential Revision: https://developer.blender.org/D1591
This commit is contained in:
Sergey Sharybin 2015-12-15 13:51:09 +05:00
parent 879889c47c
commit 2339a84443
4 changed files with 43 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
source/blender/compositor/nodes/COM_TrackPositionNode.cpp
View File

@ -44,6 +44,8 @@ void TrackPositionNode::convertToOperations(NodeConverter &converter, const Comp
NodeOutput *outputX = this->getOutputSocket(0);
NodeOutput *outputY = this->getOutputSocket(1);
NodeOutput *outputSpeedX = this->getOutputSocket(2);
NodeOutput *outputSpeedY = this->getOutputSocket(3);
int frame_number;
if (editorNode->custom1 == CMP_TRACKPOS_ABSOLUTE_FRAME) {
@ -62,7 +64,7 @@ void TrackPositionNode::convertToOperations(NodeConverter &converter, const Comp
operationX->setPosition(editorNode->custom1);
operationX->setRelativeFrame(editorNode->custom2);
converter.addOperation(operationX);
TrackPositionOperation *operationY = new TrackPositionOperation();
operationY->setMovieClip(clip);
operationY->setTrackingObject(trackpos_data->tracking_object);
@ -72,7 +74,31 @@ void TrackPositionNode::convertToOperations(NodeConverter &converter, const Comp
operationY->setPosition(editorNode->custom1);
operationY->setRelativeFrame(editorNode->custom2);
converter.addOperation(operationY);
TrackPositionOperation *operationSpeedX = new TrackPositionOperation();
operationSpeedX->setMovieClip(clip);
operationSpeedX->setTrackingObject(trackpos_data->tracking_object);
operationSpeedX->setTrackName(trackpos_data->track_name);
operationSpeedX->setFramenumber(frame_number);
operationSpeedX->setAxis(0);
operationSpeedX->setPosition(editorNode->custom1);
operationSpeedX->setRelativeFrame(editorNode->custom2);
operationSpeedX->setSpeedOutput(true);
converter.addOperation(operationSpeedX);
TrackPositionOperation *operationSpeedY = new TrackPositionOperation();
operationSpeedY->setMovieClip(clip);
operationSpeedY->setTrackingObject(trackpos_data->tracking_object);
operationSpeedY->setTrackName(trackpos_data->track_name);
operationSpeedY->setFramenumber(frame_number);
operationSpeedY->setAxis(1);
operationSpeedY->setPosition(editorNode->custom1);
operationSpeedY->setRelativeFrame(editorNode->custom2);
operationSpeedY->setSpeedOutput(true);
converter.addOperation(operationSpeedY);
converter.mapOutputSocket(outputX, operationX->getOutputSocket());
converter.mapOutputSocket(outputY, operationY->getOutputSocket());
converter.mapOutputSocket(outputSpeedX, operationSpeedX->getOutputSocket());
converter.mapOutputSocket(outputSpeedY, operationSpeedY->getOutputSocket());
}

12
source/blender/compositor/operations/COM_TrackPositionOperation.cpp
View File

@ -45,6 +45,7 @@ TrackPositionOperation::TrackPositionOperation() : NodeOperation()
this->m_axis = 0;
this->m_position = CMP_TRACKPOS_ABSOLUTE;
this->m_relativeFrame = 0;
this->m_speed_output = false;
}
void TrackPositionOperation::initExecution()
@ -78,7 +79,16 @@ void TrackPositionOperation::initExecution()
copy_v2_v2(this->m_markerPos, marker->pos);
if (this->m_position == CMP_TRACKPOS_RELATIVE_START) {
if (this->m_speed_output) {
marker = BKE_tracking_marker_get(track, clip_framenr - 1);
if ((marker->flag & MARKER_DISABLED) == 0) {
copy_v2_v2(this->m_relativePos, marker->pos);
}
else {
copy_v2_v2(this->m_relativePos, this->m_markerPos);
}
}
else if (this->m_position == CMP_TRACKPOS_RELATIVE_START) {
int i;
for (i = 0; i < track->markersnr; i++) {

2
source/blender/compositor/operations/COM_TrackPositionOperation.h
View File

@ -47,6 +47,7 @@ protected:
int m_axis;
int m_position;
int m_relativeFrame;
bool m_speed_output;
int m_width, m_height;
float m_markerPos[2];
@ -67,6 +68,7 @@ public:
void setAxis(int value) {this->m_axis = value;}
void setPosition(int value) {this->m_position = value;}
void setRelativeFrame(int value) {this->m_relativeFrame = value;}
void setSpeedOutput(bool speed_output) {this->m_speed_output = speed_output;};
void initExecution();

2
source/blender/nodes/composite/nodes/node_composite_trackpos.c
View File

@ -36,6 +36,8 @@
static bNodeSocketTemplate cmp_node_trackpos_out[] = {
{ SOCK_FLOAT, 0, N_("X")},
{ SOCK_FLOAT, 0, N_("Y")},
{ SOCK_FLOAT, 0, N_("Speed X")},
{ SOCK_FLOAT, 0, N_("Speed Y")},
{ -1, 0, "" }
};