【笔记】【Maya工具】Python For Maya（Cmds）（三）The Animation Tweener

一、UI library

  • QT

    • maya的UI就是用QT建立的

  • PySide

image-20220630000053014

选取某一帧进行百分比插值

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from maya import cmds

def tween(percentage, obj = None, attrs = None, selection = True):
    if not obj and not selection:
        raise ValueError("No object given to tween")
    if not obj:
        obj = cmds.ls(selection = True)[0]
    if not attrs:
        attrs = cmds.listAttr(obj,keyable = True)
    currentTime = cmds.currentTime(query = True)
    
    for attr in attrs:
        # construct the full name of the attr with its obj
        attrFull = '{}.{}'.format(obj,attr)
        # get the keyframes of the attr on this obj
        keyframes = cmds.keyframe(attrFull, query = True)
        
        if not keyframes:
            continue
        previousKeyframes = [frame for frame in keyframes if frame < currentTime]
        
        laterKeyframes = [frame for frame in keyframes if frame> currentTime]
        if not previousKeyframes and not laterKeyframes:
            continue
            
            
        if previousKeyframes:
            previousFrame = max(previousKeyframes)
        else:
            previousFrame = None
        nextFrame = min(laterKeyframes) if laterKeyframes else None
        
        if not previousFrame or not nextFrame:
            continue
        previousValue = cmds.getAttr(attrFull, time = previousFrame)
        nextValue = cmds.getAttr(attrFull, time = nextFrame)
        
        difference = nextValue - previousValue
        weightedDifference = (difference*percentage) / 100.0
        currentValue = previousValue + weightedDifference
        print(previousValue)
        print(nextValue)
        print(currentValue)
        cmds.setKeyframe(attrFull, time = currentTime, value = currentValue)
        
tween(50)

二、创建窗口

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import maya.cmds as cmds

# Make a new window
#
window = cmds.window( title="Long Name", iconName='Short Name', widthHeight=(200, 55) )
cmds.columnLayout( adjustableColumn=True )
cmds.button( label='Do Nothing' )
cmds.button( label='Close', command=('cmds.deleteUI(\"' + window + '\", window=True)') )
cmds.setParent( '..' )
cmds.showWindow( window )

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class TweenWindow(object):
    windowName = "TweenerWindow"
	def show(self):
        if cmds.window(self.windowName, query = True, exists = True):
            cmds.deleteUI(self.windowName)
        cmds.window(self.windowName)
        self.buildUI()
        cmds.showWindow()
    def buildUI(self):
        column = cmds.colunmLayout()
        cmds.text(label = "Use this slider to set the tween amout")
        row = cmds.rowLayout(numberOfColumns = 2)
        self.slider = cmds.floatSlider(min = 0, max = 100, value = 50,step = 1,changeCommand = tween)
        cmds.button(labe = "Reset",command = self.reset)
        
        cmds.setParent(column)
        cmds.button(label = "Close", command = self.close)
    def reset(self,*args):#button默认传递参数，但不重要
        print("resetting UI")
        cmds.floatSlider(self.slider, edit = True, value = 50)
    def close(self,*args):
        cmds.deleteUI(self.windowName)

三、Base UI for different function

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import tween
import Gear
from maya import cmds
class BaseWindow(object):
    windowName = "BaseWindow"
	def show(self):
        if cmds.window(self.windowName, query = True, exists = True):
            cmds.deleteUI(self.windowName)
        cmds.window(self.windowName)
        self.buildUI()
        cmds.showWindow()
    def buildUI(self):
		pass
    def reset(self,*args):#button默认传递参数，但不重要
		pass
    def close(self,*args):
        cmds.deleteUI(self.windowName)
        
class TweenerUI(BaseWindow):#继承basewindow基类
    windowName = "TweenerWindow"
    def buildUI(self):
        column = cmds.colunmLayout()
        cmds.text(label = "Use this slider to set the tween amout")
        row = cmds.rowLayout(numberOfColumns = 2)
        self.slider = cmds.floatSlider(min = 0, max = 100, value = 50,step = 1,changeCommand = tween)
        cmds.button(labe = "Reset",command = self.reset)
        
        cmds.setParent(column)
        cmds.button(label = "Close", command = self.close)
    def reset(self,*args):#button默认传递参数，但不重要
        print("resetting UI")
        cmds.floatSlider(self.slider, edit = True, value = 50)
        
class GearUI(BaseWindow):
    windowName = "GearWindow"
    def __init__(self):
        self.gear = None
    def buildUI(self):
        column = cmds.columnLayout()
        cmds.text(label = "Use the silider to modify the gear")
        cmds.rowLayout(numberOfColumns = 4)
        self.label = cmds.text(label = "10")
        self.slider = cmds.intSlider(min = 5, max = 30, value = 10,step = 1, dragCommand = self.modifyGear)
        cmds.button(label = "Make Gear", command = self.makeGear)
        cmds.button(label = "Reset",command = self.reset)
        cmds.setParent(column)
        cmds.button(label = "Close",command = self.close)
    def makeGear(self,*args):
        teeth = cmds.intSlider(self.slider,query = True, value = True)
        self.gear = Gear()
        self.gear.createGear(teeth = teeth)
        
    def modifyGear(self,teeth):
        if self.gear:
            self.gear.changeTeeth(teeth = teeth)
        cmds.text(self.label,edit = True, label = teeth
    def reset(self,*args):
        self.gear = None
        cmds.intSlider(self.slider,edit = True,value = 10)
                  cmds.text(self.label,eidt = True,label = '10')
GearUI().show()

四、Add script to maya shelf

image-20220701001501311

直接选中脚本代码，然后拖到上面，就出现了一个按钮，一点按钮，自动运行，右键可以修改