Updated for Nuke 13 (Python3) Original script created Innders on Nukepedia: https://www.nukepedia.com/gizmos/3d/reconcile3dpro/finishdown?miv=1&mjv=1

reconcile3DPro.nk

set cut_paste_input [stack 0]
version 13.1 v3
push $cut_paste_input
Group {
name reconcile3DPro
tile_color 0xc43c00ff
selected true
xpos 151
ypos -112
addUserKnob {20 User}
addUserKnob {22 axisFromSelection l "Create Axis From Selection" t "Automatcially create axis points with positioning based on selected vertex in the viewer." -STARTLINE T "import nuke\nimport nukescripts\nfrom nukescripts import snap3d\nimport math\n\n\nthisNode = nuke.thisNode()\n\ndef getConnectedPoints(thisNode):\n    # get points input node\n    inputParent = thisNode.input(1)\n    \n    axisPoints = \[]\n    #check something is plugged in\n    if not inputParent:\n        return axisPoints\n    \n    if inputParent.Class() == 'Axis2' or inputParent.Class() == 'Axis':\n        axisPoints = \[inputParent]\n    else:  \n        # get nodes plugged into scene\n        inputParentDeps = inputParent.dependencies()\n        # filter out any deps that aren't axis nodes\n        def isAxisNode(node):\n            return node.Class() == \"Axis2\" or node.Class() == \"Axis\"\n        \n        axisPoints = list(filter(isAxisNode, inputParentDeps))\n        \n    return axisPoints\n\n\ndef axisFromSelection():\n    thisNode.end()\n    thisNode\['selected'].setValue(False)\n    x = thisNode\['xpos'].getValue()    \n    y = thisNode\['ypos'].getValue()\n\n    vertices = snap3d.selectedPoints()\n    verticesInfo = snap3d.selectedVertexInfos()\n\n    \n    vPoints= \[]\n    \n    #get pre existing points\n    axisPoints = getConnectedPoints(thisNode)\n\n    if len(axisPoints) > 0:\n        #delete pre existing points (will be re-added again later on)\n        for a in axisPoints:\n            pos = a\['translate'].getValue()\n            #convert to vector3\n            vector3 = nuke.math.Vector3(pos\[0],pos\[1],pos\[2])\n            #now add axis points position to vPoints\n            vPoints.append(vector3)\n            #delete axis\n            nuke.delete(a) \n            #delete anything left connected directly to input\n            if thisNode.input(1):\n                nuke.delete(thisNode.input(1))\n\n    \n    for v in verticesInfo:\n        if v.position in vPoints:\n            print('position already found, removing duplicate.')\n        else:\n            vPoints.append(v.position)\n            \n            #check for no points\n    if len(vPoints) < 1:\n        nuke.message('Please select at least one vertex in the 3D Viewer')\n        return\n        \n    print(vPoints)\n            \n      \n    aNodes = \[]    \n    for i, v in enumerate(vPoints):\n        a = nuke.createNode('Axis2', inpanel = False)\n        a\['translate'].setValue(v)\n        a\['selected'].setValue(False)\n        a\['ypos'].setValue(y-154-10)\n        a\['xpos'].setValue(x+230 + (i*110))\n        aNodes.append(a)\n    \n\n    #create mergeGeo\n    m = nuke.nodes.MergeGeo()\n    m\['ypos'].setValue(y)\n    m\['xpos'].setValue(x+230 -10)\n    #connect to reconcile3DPro\n    thisNode.setInput(1, m)\n    #connect axis points to mergeGeo\n    for i, a in enumerate(aNodes):\n        m.setInput(i,a)\n\n\naxisFromSelection()\n"}
addUserKnob {22 trackPoints l "Track Axis Points!" t "This is where the magic happens and the axis 3D points are converted to 2D tracks. If anything changes this will need to be run again to see the updates." -STARTLINE T "import nuke\nimport nukescripts\n\n\nthisNode = nuke.thisNode()\n\nthisNode.begin()\n\ndef convertPoints(points, camera):\n    #about if no camera\n    if camera.Class() != \"Camera\" and camera.Class() != \"Camera2\" and camera.Class() != \"Camera3\":\n        return nuke.message('Please connect a camera!')\n    #abort if no axis points\n    if len(points) < 1:\n        return nuke.message('Please connect at least one axis to points. For one axis connect dirrectly, for multiple connect using a scene node.')   \n         \n    print(\"camera and points valid\")\n    \n    axisList = points\n    recList = \[]\n    cam = camera        \n\n    # Creates Reconcile3D for every axis and renders it with the root framerange\n    for axis in axisList:\n        recList.append( nuke.nodes.Reconcile3D(inputs= \[None, cam, axis]) )\n    first = int( nuke.root()\['first_frame'].value() )\n    last = int( nuke.root()\['last_frame'].value() )\n    frameList = \[\[first, last, 1]]\n    print('Reconciling %s Axis nodes for frames %s - %s' %(len(axisList), first, last))\n    nuke.executeMultiple(recList, frameList)\n    \n    # For each axis node selected, makes a track\n    # Sets transform to matchmove and use_for for each to \"TR\"\n    trk = nuke.toNode('axisTracker')\n    trk\['selected'].setValue(True)\n    trk\['xpos'].setValue(cam.xpos()+100)\n    trk\['ypos'].setValue(cam.ypos()+100)\n    trk\['reference_frame'].setValue(nuke.frame())\n    \n    # Hooks up and deletes each reconcile3D node to tracker\n    for i, rec in enumerate(recList):\n        outputX = rec\['output'].animation(0)\n        outputY = rec\['output'].animation(1)\n        numColumns = 31 \n\n        trk\['add_track'].execute()\n        # track_x    (2)\n        for key in list(outputX.keys()):\n            trk\['tracks'].setValueAt(key.y, key.x, numColumns*i + 2)\n        # track_y    (3)\n        for key in list(outputY.keys()):\n            trk\['tracks'].setValueAt(key.y, key.x, numColumns*i + 3)\n        # Translate  (6)\n        trk\['tracks'].setValue(1.0, numColumns*i + 6)\n        # Rotate     (7)\n        trk\['tracks'].setValue(1.0, numColumns*i + 7)\n        # Scale      (8)\n        trk\['tracks'].setValue(1.0, numColumns*i + 8)\n        \n        nuke.delete(rec)\n    # Force update tracker\n    trk\['transform'].setFlag(0)\n    trk\['transform'].setValue('match-move')\n    trk\['transform'].setValue('none')\n    \n#get camera\ncameraParent = thisNode.input(0)\ntopnode_name = nuke.tcl(\"full_name \[topnode %s]\" % thisNode.name())\ncamera = nuke.toNode(topnode_name)\n\ndef getConnectedPoints(thisNode):\n    # get points input node\n    inputParent = thisNode.input(1)\n    #check something is plugged in\n    if not inputParent:\n        nuke.message('Please connect some points')\n        return\n    \n    axisPoints = \[]\n    \n    if inputParent.Class() == 'Axis2' or inputParent.Class() == 'Axis':\n        axisPoints = \[inputParent]\n    else:  \n        # get nodes plugged into scene\n        inputParentDeps = inputParent.dependencies()\n        # filter out any deps that aren't axis nodes\n        def isAxisNode(node):\n            return node.Class() == \"Axis2\" or node.Class() == \"Axis\"\n        \n        axisPoints = list(filter(isAxisNode, inputParentDeps))\n        \n    return axisPoints\n\naxisPoints = getConnectedPoints(thisNode)\n\n# try to convert points\ntry:\n    convertPoints(axisPoints, camera)\nexcept:\n    e = sys.exc_info()\[0]\n    print(e)"}
addUserKnob {26 axis_tracks l "Axis Tracks"}
addUserKnob {41 tracks l "" -STARTLINE T axisTracker.tracks}
addUserKnob {41 add_track l "add track" T axisTracker.add_track}
addUserKnob {41 del_tracks l "delete tracks" -STARTLINE T axisTracker.del_tracks}
addUserKnob {26 "" l <b>Export</b>}
addUserKnob {22 trackerExport l "Export Tracker" T "group = nuke.thisNode()\ngroup.begin()\nnuke.toNode('axisTracker')\['selected'].setValue(True)\nnuke.nodeCopy(\"%clipboard%\")\ngroup.end()\ntrackerCopy = nuke.nodePaste(\"%clipboard%\")" +STARTLINE}
addUserKnob {20 transform l Transform}
addUserKnob {41 reference_frame l "reference frame" T axisTracker.reference_frame}
addUserKnob {41 translate T axisTracker.translate}
addUserKnob {41 rotate T axisTracker.rotate}
addUserKnob {41 scale T axisTracker.scale}
addUserKnob {41 center T axisTracker.center}
addUserKnob {20 tips l Tips}
addUserKnob {26 tipsText l "" +STARTLINE T "<html>\n<style>\nli \{\n    margin-top: 10px;\n\}\ndiv \{\n    color: grey;\n\}\n</style>\n<h2>Setup Method 1 (auto)</h2>\n<ul>\n    <li>Select a vertex point in the 3D viewer and click 'Create Axis From Selection'.</li>\n    <li>Select another one to add more, you can just keep adding them</li>\n    <li>Select multiple ones all at once to create them all in one go</li>\n    <li>Everything should have automatically linked up, with the positions on the axis already added</li>\n    <li>Go to the tracking step if everything is working!</li>\n</ul>\n\n\n<h2>Setup Method 2 (manual)</h2>\n<ul>\n<li>Connect all your axis points (that have the correct 3D position) to one mergeGeo node.</li>\n<li>Connect \"points\" input to the mergeGeo node.</li>\n<li>For one axis point you can connect it directly to the \"points\" input.</li>\n<li>Trackers will be created in the order of how the mergeGeo axis nodes are connected: <br/>1 will be the first tract etc. </li>\n</ul>\n\n\n<h2>Tracking</h2>\n\n\n<ul>\n<li>Once everything is connected click \"Track Axis Points!\" and the tracks will be calculated.</li>\n<li>To update or redo the tracks it's best to delete any current tracks<br/>and click \"Track Axis Points!\" again.</li>\n</ul>\n\n\n<div>\nCredits<br/>\nLuke Inderwick 2021\n</div>\n</html>"}
}
Input {
 inputs 0
 name points
 xpos 510
 ypos 182
 number 1
}
Input {
 inputs 0
 name footage
 xpos 290
 ypos 374
 number 2
}
Output {
 name Output1
 xpos 290
 ypos 470
}
Input {
 inputs 0
 name camera
 xpos 290
 ypos 182
}
Tracker4 {
 cornerPinOptions "CornerPin2D (use transform ref frame, baked)"
 center {320 240}
 name axisTracker
 selected true
 xpos 70
 ypos -362
}
end_group