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# !/usr/bin/env python

# *********************************
# Anim to Curve
# author Keith Sheppard
# Apr 2016
# *******************************

import lx
import modo
import sys

def alwaysList(modoData):
    if type(modoData) is list:
        return modoData
    elif type(modoData) is tuple:
        return list(modoData)
    elif type(modoData) is str:
        return list([modoData, ])
    elif type(modoData) is int:
        return list([modoData, ])

def vertList():
    vList = lx.eval('query layerservice verts ? selected')
    if not vList:
        vList = lx.eval('query layerservice verts ? all')

    return vList

def vertPos(vert):
    return lx.eval('query layerservice vert.wpos ? {%s}' % int(vert))

def vertAdd(xPos, yPos, zPos):
    lx.eval('vert.new {%s} {%s} {%s}' % (xPos, yPos, zPos))

def CurrLayerIndex_get():
    return lx.eval('!!query layerservice layer.index ? current')


#PreChecks
layerIndex = CurrLayerIndex_get()

if not layerIndex:
    modo.dialogs.alert('Mesh Layer Detection','Please select a mesh and rerun AnimToCurve', dtype='info')
    sys.exit()

vChk = alwaysList(vertList())

#leaving this here in case only for selected verts - need to change vertList()function above
if not vChk:
    modo.dialogs.alert('Vert Selections','You need to select some verts rerun AnimToCurve', dtype='info')
    sys.exit()

try:
    lx.eval('!!time.step key last')
    frame = lx.eval('select.time ?')
except:
    modo.dialogs.alert('Mesh Not Animated','Please Animate the layer and rerun AnimToCurve', dtype='info')
    sys.exit()

#Good to Go
masterList = []
for v in vChk:

    lx.eval('!!time.step key first')
    curveDrawList = []
    while True:
        vPos = alwaysList(vertPos(v))
        curveDrawList.append(vPos)
        if frame == lx.eval('select.time ?'): break
        lx.eval('!!time.step key next')

    masterList.append(curveDrawList)

lx.eval('item.create mesh')
lx.eval('item.name curveDraw')

for vPosList in masterList:
    for vp in vPosList:
        vertAdd(vp[0],vp[1],vp[2])
    lx.eval('select.vertex add poly equal 0')
    lx.eval('poly.makeCurveOpen')


#Done