import maya.cmds as cmds
import MASH.api as mapi
import maya.mel as mel
import maya.app.flux.core as fx


def runPreset():
    cmds.select(clear=True)

    #
    # Drop Window
    #

    # Add labels for each step of the smart preset
    steps = [
        'Step 1: Drag in your stuff:', 
        'Step 2: Drag in a pile starting shape (like a cone):'
    ]

    # List the accepted node types for each step
    acceptableNodeTypes = [
        ['mesh'], 
        ['mesh']
    ]

    # create the drop window
    fx.DropWindow.getDrop(steps, callback=lambda data: smartPreset.send(data), title='MASH - Pile of Stuff', accepts=acceptableNodeTypes)
    node = yield

    # split the dragged nodes into a list and only use the first object
    nodes = node.split('\n')

    # get the largest bbox dimension, this will be the voxel size
    longestSide = 0
    for obj in nodes:
        bbox = cmds.exactWorldBoundingBox(obj)
        tmpX = bbox[3] - bbox[0]
        if tmpX > longestSide: longestSide = tmpX
        tmpY = bbox[4] - bbox[1]
        if tmpY > longestSide: longestSide = tmpY
        tmpZ = bbox[5] - bbox[2]
        if tmpZ > longestSide: longestSide = tmpZ
    longestSide *= .8

    # create a new MASH network
    mashNetwork = mapi.Network()
    mashNetwork.createNetwork(name = "MASH_Pile", geometry="Instancer")

    # get the second step drop
    node = yield

    # split the dragged nodes into a list and only use the first object
    node = node.split('\n')[0]
        
    # put the ground undreneath the pile object
    groundBBox = cmds.exactWorldBoundingBox(node)
    groundPosition = groundBBox[1]

    # set up the MASH network
    mashNetwork.meshDistribute(node, 6)
    cmds.setAttr(mashNetwork.distribute + '.voxelDensity', longestSide)
    cmds.setAttr(mashNetwork.distribute + '.voxelMode', 3) # fill inside with voxels

    # random rotations
    randomNode = mashNetwork.addNode("MASH_Random")
    cmds.setAttr(randomNode.name + '.positionX', 0)
    cmds.setAttr(randomNode.name + '.positionY', 0)
    cmds.setAttr(randomNode.name + '.positionZ', 0)
    cmds.setAttr(randomNode.name + '.rotationX', 360)
    cmds.setAttr(randomNode.name + '.rotationY', 360)
    cmds.setAttr(randomNode.name + '.rotationZ', 360)

    # add dynamice
    dynamicsNode = mashNetwork.addNode("MASH_Dynamics")
    cmds.setAttr(dynamicsNode.name + '.collisionShape', 4) # force convex hull for fast computation
    cmds.setAttr(dynamicsNode.name + '.friction', 1)
    cmds.setAttr(dynamicsNode.name + '.rollingFriction', 1)
    cmds.setAttr(dynamicsNode.name + '.bounce', 0)
    cmds.setAttr(dynamicsNode.name + '.mass', 10)
    solver = cmds.listConnections(dynamicsNode.name+(".enable"))[0] or []
    if cmds.optionVar (query="upAxisDirection") == "z":
        cmds.setAttr(solver + '.groundPlanePositionZ', groundPosition)
    else:
        cmds.setAttr(solver + '.groundPlanePositionY', groundPosition)

    # hide the rock pile shape object
    cmds.hide(node)
    yield

# run the preset
smartPreset = runPreset()
smartPreset.next()
# ===========================================================================
# Copyright 2018 Autodesk, Inc. All rights reserved.
#
# Use of this software is subject to the terms of the Autodesk license
# agreement provided at the time of installation or download, or which
# otherwise accompanies this software in either electronic or hard copy form.
# ===========================================================================