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Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://community.chocolatey.org/install.ps1'))

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::安装 MSVC
choco install visualstudio2019buildtools --yes
choco install vcredist140 --yes

::安装 gcc
choco install mingw --yes

::安装 clang
choco install llvm --yes

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C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\Common7\Tools\VsDevCmd.bat
cl /Zi /std:c++20 /EHsc /Fe: main.exe main.cpp

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g++ -g -std=c++20 main.exe main.cpp

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clang -g -std=c++20 main.exe main.cpp

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"cpp": "cd $dir && g++ -g -std=c++20 *.cpp -o $fileNameWithoutExt && $dir$fileNameWithoutExt",

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import pyeml.core as pm
from maya import OpenMaya
PAINT_CTX = "artAttrColorPerVertexContext"
color_set_representation = {
    "R": "RGB",
    "G": "RGB",
    "B": "RGB",
    "A": "A",
}
def get_color_sets(node):
    color_sets = pm.polyColorSet(node, q=1, allColorSets=1)
    return color_sets or pm.polyColorSet(node, create=1)

def filter_color(color, index, source_color=None):
    if index > 3:
        return color
    is_color = isinstance(source_color, OpenMaya.MColor)
    color_list = list(source_color) if is_color else [0, 0, 0, 1]
    color_list[index] = color[index]
    return OpenMaya.MColor(*color_list)

# NOTES(timmyliang): 获取当前正在绘制的节点
for node in set(pm.artAttrPaintVertexCtx(PAINT_CTX, q=1, pna=1).split()):
    node = pm.PyNode(node)
    node.displayColors.set(1)
    color_sets = get_color_sets(node)
    main_color_set = color_sets[0]

    mesh = node.__apimfn__()
    
    # NOTES(timmyliang): 获取主 color set 顶点色
    color_array = OpenMaya.MColorArray()
    mesh.getVertexColors(color_array, main_color_set)

    # NOTES(timmyliang): 获取顶点序号数组
    vtx_array = OpenMaya.MIntArray()
    for array_index in range(color_array.length()):
        vtx_array.append(array_index)

    final_colors = OpenMaya.MColorArray()
    for channel_index, color_channel in enumerate(cls.CHANNELS):
        # NOTES(timmyliang): 如果通道 color set 不存在则创建
        color_set = "VertexColor{0}".format(color_channel)
        if color_set not in color_sets:
            rpt = color_set_representation.get(color_channel)
            pm.polyColorSet(node, create=1, rpt=rpt, colorSet=color_set)

        mesh.setCurrentColorSetName(color_set)
        final_colors.clear()
        for array_index in range(color_array.length()):
            full_color = color_array[array_index]
            color = filter_color(full_color, index=channel_index)
            final_colors.append(color)
        # NOTES(timmyliang): 批量设置顶点色
        mesh.setVertexColors(final_colors, vtx_array)
    mesh.setCurrentColorSetName(main_color_set)

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# NOTES(timmyliang): 获取 UI 的颜色和透明值
rgb = pm.colorSliderGrp("colorPerVertexColor", q=1, rgb=1)
alpha = pm.floatSliderGrp("colorPerVertexAlpha", q=1, value=1)
rgb.append(alpha)
# NOTES(timmyliang): 组装颜色，过滤掉相应的通道。
# 获取 ui 的选项
sel = pm.radioButtonGrp(SINGLE_CONTROL, q=1, sl=1)
# 过滤颜色
color = filter_color(rgb, index=sel)
pm.artAttrPaintVertexCtx(PAINT_CTX, e=1, cl4=tuple(color))

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def apply_color_channel(cls):
    index = pm.radioButtonGrp(cls.SINGLE_CONTROL, q=1, sl=1)
    mode = cls.OPTION_ITEMS[index + 1]
    is_rgb = mode == "RGB"
    for node in cls.get_paint_nodes():
        dag_path = node.__apimdagpath__()
        mesh = OpenMaya.MFnMesh(dag_path)
        color_sets = cls.get_color_sets(node)
        main_color_set = color_sets[0]

        current_color_set = mesh.currentColorSetName()

        main_colors = OpenMaya.MColorArray()
        mesh.getVertexColors(main_colors, main_color_set)
        vtx_array = cls.vertex_color_data[node.fullPathName()]
        final_colors = OpenMaya.MColorArray()

        # NOTES(timmyliang): 如果当前绘制为非单通道
        if is_rgb:
            # NOTES(timmyliang): 将当前的主颜色 拆分到各个通道上
            for channel_index, color_channel in enumerate(cls.CHANNELS):
                final_colors.clear()
                color_set = "VertexColor{0}".format(color_channel)
                mesh.setCurrentColorSetName(color_set)
                for vtx_index in vtx_array:
                    main_color = main_colors[vtx_index]
                    color = cls.filter_color(main_color, channel_index)
                    final_colors.append(color)
                mesh.setVertexColors(final_colors, vtx_array)
        else:
            mode_index = cls.OPTION_ITEMS.index(mode) - 2
            channel_colors = OpenMaya.MColorArray()
            fix_colors = OpenMaya.MColorArray()
            color_set = "VertexColor{0}".format(mode)
            mesh.getVertexColors(channel_colors, color_set)
            # NOTES(timmyliang): 获取单通道的颜色 回馈到主颜色上
            for vtx_index in vtx_array:
                channel_color = channel_colors[vtx_index]
                main_color = main_colors[vtx_index]
                color = cls.filter_color(channel_color, mode_index, main_color)
                final_colors.append(color)
                fix_color = cls.filter_color(channel_color, mode_index)
                fix_colors.append(fix_color)

            mesh.setVertexColors(fix_colors, vtx_array)
            mesh.setCurrentColorSetName(main_color_set)
            mesh.setVertexColors(final_colors, vtx_array)

        mesh.setCurrentColorSetName(current_color_set)

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from maya import cmds
cmds.radioButtonGrp('artAttrColorChannelChoices',e=1,gbc=[255,0,0])

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from maya import cmds
parent = cmds.radioButtonGrp('artAttrColorChannelChoices',q=1,parent=1)
print(parent)
# ToolSettings|MainToolSettingsLayout|tabLayout1|artAttrColorPerVertex|artCommonOperationFrame|columnLayout1061|columnLayout1065
window = cmds.window()
column_layout = cmds.columnLayout()
for control in cmds.layout(parent,q=1,childArray=1):
    cmds.control(control, e=1, p=column_layout)
    
cmds.showWindow(window)

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from maya import cmds
window = cmds.window()
cmds.setUITemplate("OptionsTemplate", pushTemplate=1)

column_layout = cmds.columnLayout()
parent = cmds.radioButtonGrp('artAttrColorChannelChoices',q=1,parent=1)
for control in cmds.layout(parent,q=1,childArray=1):
    cmds.control(control, e=1, p=column_layout)
    
cmds.setUITemplate(popTemplate=1)
cmds.showWindow(window)

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from maya import cmds
window = cmds.window()
cmds.setUITemplate("OptionsTemplate", pushTemplate=1)

column_layout = cmds.columnLayout()
parent = cmds.radioButtonGrp('artAttrColorChannelChoices',q=1,parent=1)
for control in cmds.layout(parent,q=1,childArray=1):
    cmds.control(control, e=1, p=column_layout)
    if control == "artAttrColorChannelChoices":
        cmds.button(label="click me")
    
cmds.setUITemplate(popTemplate=1)
cmds.showWindow(window)

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from maya import cmds
parent = cmds.radioButtonGrp('artAttrColorChannelChoices',q=1,parent=1)
cmds.setParent(parent)
cmds.setUITemplate("OptionsTemplate", pushTemplate=1)
column_layout = cmds.columnLayout()

for control in cmds.layout(parent,q=1,childArray=1):
    cmds.control(control, e=1, p=column_layout)
    if control == "artAttrColorChannelChoices":
        cmds.button(label="click me")
    
cmds.setUITemplate(popTemplate=1)

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import pymel.core as pm
from Qt import QtWidgets
widget = pm.uitypes.toQtObject("artAttrColorChannelChoices")
parent = widget.parent()
print(parent.objectName())
# columnLayout1065 objectName 和 mel 的 controlName 是一样的
layout = parent.layout()
print(layout)
# <PySide2.QtWidgets.QLayout object at 0x0000014DB0917648>
layout.addWidget(QtWidgets.QPushButton("asd"))

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import pymel.core as pm
from Qt import QtWidgets
widget = pm.uitypes.toQtObject("artAttrColorChannelChoices")
parent = widget.parent()
layout = parent.layout()
index = layout.indexOf(widget)
widget_list = [layout.takeAt(0).widget() for _ in range(layout.count())]
widget_list.insert(index,QtWidgets.QPushButton("click me"))
for widget in widget_list:
    layout.addWidget(widget)

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import maya.cmds as cmds
ctx = cmds.marqueeToolContext()
cmds.setToolTo(ctx)

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import maya.cmds as cmds
ctx = cmds.helixToolContext()
cmds.setToolTo(ctx)

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from pymel.tools import mel2py
path = r"C:\Program Files\Autodesk\Maya2018\scripts\others\customtoolPaint.mel"
with open(path,'r') as rf:
    content = rf.read()
py_str = mel2py.mel2pyStr(content, pymelNamespace="pm")
print(py_str)

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import pymel.core as pm
from pymel.tools import py2mel

def helixProperties():
    pm.setUITemplate("DefaultTemplate", pushTemplate=1)
    parent = str(pm.toolPropertyWindow(q=1, location=1))
    pm.setParent(parent)
    pm.columnLayout("helix")
    pm.tabLayout("helixTabs", childResizable=True)
    pm.columnLayout("helixTab")
    pm.frameLayout("helixFrame", cll=True, l="Helix Options", cl=False)
    pm.columnLayout("helixOptions")
    pm.separator(style="none")
    pm.intSliderGrp(
        "numCVs", field=1, minValue=20, maxValue=100, value=1, label="Number of CVs"
    )
    pm.checkBoxGrp("upsideDownGrp", numberOfCheckBoxes=1, l1=" ", label="Upside Down")
    pm.setParent("..")
    # helixOptions
    pm.setParent("..")
    # helixFrame
    pm.setParent("..")
    # helixTab
    pm.setParent("..")
    # helixTabs
    pm.setParent("..")
    # helix
    # Name the tabs; -tl does not allow tab labelling upon creation
    pm.tabLayout("helixTabs", tl=("helixTab", "Tool Defaults"), e=1)
    pm.setUITemplate(popTemplate=1)
    helixSetCallbacks(parent)

def helixSetCallbacks(parent):
    pm.setParent(parent)
    pm.checkBoxGrp(
        "upsideDownGrp",
        e=1,
        on1=lambda *args: pm.helixToolContext(pm.currentCtx(), upsideDown=True, e=1),
        of1=lambda *args: pm.helixToolContext(pm.currentCtx(), upsideDown=False, e=1),
    )
    pm.intSliderGrp(
        "numCVs",
        e=1,
        cc=lambda *args: pm.helixToolContext(pm.currentCtx(), numCVs=args[0], e=1),
    )

def helixValues(toolName):
    parent=(str(pm.toolPropertyWindow(q=1, location=1)) + "|helix|helixTabs|helixTab")
    pm.setParent(parent)
    icon="helixTool.xpm"
    help=""
    pm.mel.toolPropertySetCommon(toolName, icon, help)
    pm.frameLayout('helixFrame', en=True, e=1, cl=False)
    helixOptionValues(toolName)
    pm.mel.toolPropertySelect('helix')

def helixOptionValues(toolName):
    
    cv_num = 0
    cv_num=int(pm.mel.eval("helixToolContext -q -numCVs " + toolName))
    pm.intSliderGrp('numCVs', e=1, value=cv_num)
    cv_num=int(pm.mel.eval("helixToolContext -q -upsideDown " + toolName))
    if cv_num:
        pm.checkBoxGrp('upsideDownGrp', e=1, value1=1)
    else:
        pm.checkBoxGrp('upsideDownGrp', e=1, value1=0)

py2mel.py2melProc(helixProperties, procName="helixProperties")
py2mel.py2melProc(helixValues, procName="helixValues")

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import maya.cmds as cmds
ctx = cmds.grabUVContext()
cmds.setToolTo(ctx)

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MStatus curveBrushContext::doPtrMoved(MEvent &event, MHWRender::MUIDrawManager &drawMgr, const MHWRender::MFrameContext &context)
{
    short x, y;
    event.getPosition(x, y);
    mBrushCenterScreenPoint = MPoint(x, y);
    auto radius = mBrushConfig.size();

    drawMgr.beginDrawable();
    if (bFalloffMode)
    {
        for (unsigned int index = 0; index < objDagPathArray.length(); ++index)
        {
            MPointArray pointArray;
            MColorArray colorArray;
            MFnNurbsCurve curveFn(objDagPathArray[index]);
            unsigned int segmentCount = 100;
            for (unsigned int pointIndex = 0; pointIndex < segmentCount; ++pointIndex)
            {
                MPoint point;
                auto param = curveFn.findParamFromLength(curveFn.length() * pointIndex / segmentCount);
                curveFn.getPointAtParam(param, point, MSpace::kWorld);
                pointArray.append(point);

                // NOTE(timmyliang): draw falloff
                short x_pos, y_pos;
                view.worldToView(point, x_pos, y_pos);
                MPoint screenPoint(x_pos, y_pos);
                auto distance = (mBrushCenterScreenPoint - screenPoint).length();
                auto field = 1 - distance / radius;
                // NOTE(timmyliang): transparent
                colorArray.append(distance > radius ? MColor(0.f) : MColor(field, field, field));
            }

            drawMgr.setLineWidth(12.0f);
            drawMgr.mesh(MHWRender::MUIDrawManager::kLineStrip, pointArray, NULL, &colorArray);
        }
    }

    drawMgr.setColor(MColor(1.f, 1.f, 1.f));
    drawMgr.setLineWidth(2.0f);
    drawMgr.circle2d(mBrushCenterScreenPoint, radius);

    drawMgr.endDrawable();
    return MS::kSuccess;
}

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MStatus curveBrushContext::doPress(MEvent &event, MHWRender::MUIDrawManager &drawMgr, const MHWRender::MFrameContext &context)
{
    view = M3dView::active3dView();
    event.getPosition(startPosX, startPosY);
    fStartBrushSize = mBrushConfig.size();
    fStartBrushStrength = mBrushConfig.strength();

    return MS::kSuccess;
}

MStatus curveBrushContext::doDrag(MEvent &event, MHWRender::MUIDrawManager &drawMgr, const MHWRender::MFrameContext &context)
{
    view.refresh(false, true);
    short currentPosX, currentPosY;
    event.getPosition(currentPosX, currentPosY);
    auto currentPos = MPoint(currentPosX, currentPosY);

    MPoint start(startPosX, startPosY);
    MVector delta = MVector(currentPos - start);

    drawMgr.beginDrawable();
    drawMgr.setColor(MColor(1.f, 1.f, 1.f));
    drawMgr.setLineWidth(2.0f);
    // NOTE(timmyliang): hold down `B` key
    if (eDragMode == kBrushSize)
    {
        float deltaValue;
        char info[64];
        // NOTES(timmyliang): left mouse for size
        if (event.mouseButton() == MEvent::kLeftMouse)
        {
            deltaValue = delta.x > 0 ? delta.length() : -delta.length();
            mBrushConfig.setSize(fStartBrushSize + deltaValue);
            sprintf(info, "Brush Size: %.2f", mBrushConfig.size());
            drawMgr.text2d(currentPos, info);
        }
        // NOTES(timmyliang): middle mouse for strength
        else if (event.mouseButton() == MEvent::kMiddleMouse)
        {
            deltaValue = delta.y > 0 ? delta.length() : -delta.length();
            mBrushConfig.setStrength(fStartBrushStrength + deltaValue);
            sprintf(info, "Brush Strength: %.2f", mBrushConfig.strength());
            drawMgr.text2d(currentPos, info);
        }
        drawMgr.line2d(start, MPoint(startPosX, startPosY + mBrushConfig.strength() * 2));
    }
    else
    {
        MPoint startNearPos, startFarPos, currNearPos, currFarPos;
        view.viewToWorld(currentPosX, currentPosY, currNearPos, currFarPos);
        view.viewToWorld(startPosX, startPosY, startFarPos, startFarPos);
        // NOTE(timmyliang): use tool command for undo
        curveBrushTool *cmd = (curveBrushTool *)newToolCommand();
        cmd->setStrength(mBrushConfig.strength());
        cmd->setRadius(mBrushConfig.size());
        cmd->setMoveVector((currFarPos - startFarPos).normal());
        cmd->setStartPoint(start);
        cmd->setDagPathArray(objDagPathArray);
        cmd->redoIt();
        cmd->finalize();
    }

    drawMgr.circle2d(start, mBrushConfig.size());
    drawMgr.endDrawable();
    return MS::kSuccess;
}

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MStatus curveBrushTool::redoIt()
{

    MVector offsetVector = moveVector * 0.002 * strength;
    M3dView view = M3dView::active3dView();

    // NOTE(timmyliang): move curves cv in radius
    short x_pos, y_pos;
    for (unsigned int index = 0; index < dagPathArray.length(); ++index)
    {
        MFnNurbsCurve curveFn(dagPathArray[index]);
        std::map<int, MVector> offsetMap;
        for (MItCurveCV cvIter(dagPathArray[index]); !cvIter.isDone(); cvIter.next())
        {
            MPoint pos = cvIter.position(MSpace::kWorld);
            int cvIndex = cvIter.index();
            curvePointMap[index][cvIndex] = pos;
            view.worldToView(pos, x_pos, y_pos);
            if ((startPoint - MPoint(x_pos, y_pos)).length() < radius)
            {
                offsetMap[cvIndex] = pos + offsetVector;
            }
        }
        for (const auto &it : offsetMap)
        {
            curveFn.setCV(it.first, it.second, MSpace::kWorld);
        }
        curveFn.updateCurve();
    }
    return MStatus::kSuccess;
}

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MStatus curveBrushTool::undoIt()
{
    // NOTE(timmyliang): reset point position
    for (const auto &kv : curvePointMap)
    {
        MFnNurbsCurve curveFn(dagPathArray[kv.first]);
        for (const auto &it : kv.second)
        {
            int cvIndex = it.first;
            MPoint pos = it.second;
            curveFn.setCV(cvIndex, pos, MSpace::kWorld);
        }
    }

    return MStatus::kSuccess;
}

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from maya import OpenMayaRender
OpenMayaRender.MUIDrawManager 
# Error: AttributeError: file <maya console> line 2: 'module' object has no attribute 'MUIDrawManager' # 
from maya.api import OpenMayaRender
OpenMayaRender.MUIDrawManager

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def initializePlugin(plugin):
    pluginFn = om.MFnPlugin(plugin)
    try:
        pluginFn.registerContextCommand(CONTEXT_NAME, CurveBrushContextCmd.creator)
        # TODO(timmyliang): not support MPxToolCommand registered
        # pluginFn.registerContextCommand(
        #     CONTEXT_NAME,
        #     CurveBrushContextCmd.creator,
        #     CONTEXT_TOOL_NAME,
        #     CurveBrushTool.creator,
        #     CurveBrushTool.newSyntax,
        # )
    except:
        sys.stderr.write("Failed to register command: %s\n" % CONTEXT_NAME)
        raise

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# Error: TypeError: file F:/repo/CMakeMaya/modules/Maya-CurveBrush/plug-ins/om2_curve_brush.py line 448: function takes exactly 2 arguments (5 given) # 

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class CurveBrushTool(omui.MPxToolCommand):
    def finalize(self):
        command = om.MArgList()
        command.addArg(self.commandString)
        for flag, config in self.flags_data.items():
            long_flag = config.get("long")
            command.addArg(flag)
            command.addArg(getattr(self, long_flag[1:]))
        # TODO(timmyliang): not accept the command argument
        # return self.doFinalize(command)

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class CanvasOverlay(QtWidgets.QWidget):
    def __init__(self, context):
        # type: (CurveBrushContext) -> None
        super(CanvasOverlay, self).__init__()
        self.setWindowFlags(
            QtCore.Qt.FramelessWindowHint
            | QtCore.Qt.SplashScreen
            | QtCore.Qt.WindowStaysOnTopHint
            | QtCore.Qt.WindowTransparentForInput
        )
        self.setAttribute(QtCore.Qt.WA_TranslucentBackground)
        self.setAttribute(QtCore.Qt.WA_NoSystemBackground)

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class AppFilter(QtCore.QObject):
    def __init__(self, canvas):
        # type: (CurveBrushContext) -> None
        super(AppFilter, self).__init__()
        self.canvas = canvas

    def eventFilter(self, receiver, event):
        if event.type() == QtCore.QEvent.MouseButtonPress:
            widget = QtWidgets.QApplication.widgetAt(QtGui.QCursor.pos())
            panel = isinstance(widget, QtCore.QObject) and widget.parent()
            name = panel and panel.objectName()
            if name:
                is_model_editor = cmds.objectTypeUI(name, i="modelEditor")
                self.canvas.setVisible(is_model_editor)
                if is_model_editor:
                    QtCore.QTimer.singleShot(0, self.canvas.setup_active_viewport)
        return super(AppFilter, self).eventFilter(receiver, event)

class CurveBrushContext(OpenMayaMPx.MPxContext):
    # 省略 ...
    def toolOnSetup(self):
        self.canvas = CanvasOverlay(self)
        # NOTES(timmyliang): 获取 QApplication 进行监听
        app = QtWidgets.QApplication.instance()
        app_filter = AppFilter(self.canvas)
        app.installEventFilter(app_filter)

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import shiboken2
import maya.OpenMaya as om
import maya.OpenMayaUI as omui

from PySide2.QtWidgets import QWidget
from PySide2.QtCore import QObject

def active_view():
    """ return the active 3d view """
    return omui.M3dView.active3dView()

def active_view_wdg():
    """ return the active 3d view wrapped in a QWidget """
    view = active_view()
    active_view_widget = shiboken2.wrapInstance(long(view.widget()), QWidget)
    return active_view_widget

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class MouseFilter(QtCore.QObject):
    wheel = QtCore.Signal(QtCore.QEvent)
    moved = QtCore.Signal(QtCore.QEvent)
    clicked = QtCore.Signal(QtCore.QEvent)
    dragged = QtCore.Signal(QtCore.QEvent)
    released = QtCore.Signal(QtCore.QEvent)
    entered = QtCore.Signal()
    leaved = QtCore.Signal()

    def __init__(self, *args, **kwargs):
        super(MouseFilter, self).__init__(*args, **kwargs)
        self.is_clicked = False

    def eventFilter(self, receiver, event):
        event_type = event.type()
        if event_type == QtCore.QEvent.MouseMove:
            self.moved.emit(event)
            if self.is_clicked:
                self.dragged.emit(event)
        elif (
            event_type == QtCore.QEvent.MouseButtonPress
            or event_type == QtCore.QEvent.MouseButtonDblClick
        ):
            self.is_clicked = True
            self.clicked.emit(event)
        elif event_type == QtCore.QEvent.MouseButtonRelease:
            self.is_clicked = False
            self.released.emit(event)
        elif event_type == QtCore.QEvent.Enter:
            self.entered.emit()
        elif event_type == QtCore.QEvent.Leave:
            self.leaved.emit()
        elif event_type == QtCore.QEvent.Wheel:
            self.wheel.emit(event)

        return super(MouseFilter, self).eventFilter(receiver, event)

viewport = active_view_wdg()
mouse_filter = MouseFilter()
viewport.installEventFilter(mouse_filter)

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def paintEvent(self, event):
    self.draw_shape(self.create_brush_cricle(), QtCore.Qt.white, 2)
    if self.is_press_B:
        self.draw_shape(self.create_brush_line(), QtCore.Qt.white, 2)
    self.draw_text(self._message_info)
    for curve, data in self.color_data.items():
        self.draw_shape(data.get("points"), data.get("colors"), 10)

    return super(CanvasOverlay, self).paintEvent(event)

def create_brush_cricle(self, count=60):
    shape = []
    radius = self.radius
    pt = self.start_pos if self.is_press_B else self.current_pos
    for index in range(count + 1):
        theta = math.radians(360 * index / count)
        pos_x = pt.x() + radius * math.cos(theta)
        pos_y = pt.y() + radius * math.sin(theta)
        shape.append(QtCore.QPointF(pos_x, pos_y))
    return shape

def create_brush_line(self):
    shape = []
    start_pt = self.start_pos if self.is_press_B else self.current_pos
    shape.append(start_pt)
    shape.append(QtCore.QPoint(start_pt.x(), start_pt.y() - self.strength))
    return shape

def draw_shape(self, line_shapes, colors, width=1):
    if len(line_shapes) < 2:
        return
    colors = colors or QtCore.Qt.white
    painter = QtGui.QPainter(self)

    painter.setRenderHint(painter.Antialiasing)
    painter.begin(self)

    if (
        isinstance(colors, Iterable)
        and not isinstance(colors, six.string_types)
        and len(colors) == len(line_shapes)
    ):
        # NOTES(timmyliang): paint falloff
        for index, point in enumerate(line_shapes[:-1]):
            start_point = point
            end_point = line_shapes[index + 1]
            grandient_color = QtGui.QLinearGradient(start_point, end_point)
            start_color = colors[index]
            end_color = colors[index + 1]
            grandient_color.setColorAt(0, start_color)
            grandient_color.setColorAt(1, end_color)
            pen = QtGui.QPen(grandient_color, width)
            pen.setCapStyle(QtCore.Qt.RoundCap)
            pen.setJoinStyle(QtCore.Qt.RoundJoin)
            painter.setPen(pen)
            painter.drawLine(start_point, end_point)
    else:
        path = QtGui.QPainterPath()
        path.moveTo(line_shapes[0])
        [path.lineTo(point) for point in line_shapes]
        color = QtGui.QColor(colors)
        pen = QtGui.QPen(color, width)
        painter.setPen(pen)
        painter.drawPath(path)

    painter.end()

def draw_text(self, text, pos=None, color=QtCore.Qt.white, width=1):
    if not text:
        return
    painter = QtGui.QPainter(self)
    pen = QtGui.QPen(color, width)
    painter.setPen(pen)
    pos = pos or self.current_pos + QtCore.QPoint(10, 0)
    painter.drawText(pos, text)
    painter.end()

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def world_to_view(position, invertY=True):
    """
    convert the given 3d position to  2d viewport coordinates
    """
    view = OpenMayaUI.M3dView.active3dView()
    arg_x = OpenMaya.MScriptUtil(0)
    arg_y = OpenMaya.MScriptUtil(0)

    arg_x_ptr = arg_x.asShortPtr()
    arg_y_ptr = arg_y.asShortPtr()
    view.worldToView(position, arg_x_ptr, arg_y_ptr)
    x_pos = arg_x.getShort(arg_x_ptr)
    y_pos = arg_y.getShort(arg_y_ptr)

    if invertY:
        y_pos = view.portHeight() - y_pos

    return (x_pos, y_pos)

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mayapy -m lib2to3 -w F:\repo\Maya-CurveBrush\scripts\ysv\ysvView.py

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from pymel.core import *
modelEditor(getPanel(wf=1), e=1, nurbsCurves=1)

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from pymel.core import *
for mp in getPanel(type="modelPanel"):
    if modelEditor(mp, q=1, av=1):
        modelEditor(mp, e=1, nurbsCurves=1)
        break

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for crv in self.inViewCurves:
    for cv in [crv.cv[0], crv.cv[-1]]:
        cv = str(cv) # fix add here
        setAttr(cv + ".xv", lock=1)
        setAttr(cv + ".yv", lock=1)
        setAttr(cv + ".zv", lock=1)
        

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#include <Python.h>
#include <maya/MGlobal.h>
#include <stdio.h>

static const char MAYA_PYTHON_C_EXT_DOCSTRING[] = "An example Python C extension that makes use of Maya functionality.";
static const char HELLO_WORLD_MAYA_DOCSTRING[] = "Says hello world!";

// NOTE(timmyliang): 调用 MGlobal API 打印 Python 传递的字符串
static PyObject *pyHelloWorldMaya(PyObject *module, PyObject *args)
{
const char *inputString;
if (!PyArg_ParseTuple(args, "s", &inputString))
{
return NULL;
}

PyGILState_STATE pyGILState = PyGILState_Ensure();

MGlobal::displayInfo(inputString);

PyObject *result = Py_BuildValue("s", inputString);

PyGILState_Release(pyGILState);

return result;
}

// NOTE(timmyliang): 定义模块的函数列表
static PyMethodDef mayaPythonCExtMethods[] = {
{"hello_world_maya", pyHelloWorldMaya, METH_VARARGS, HELLO_WORLD_MAYA_DOCSTRING},
{NULL, NULL, 0, NULL} // NOTE: (sonictk) Sentinel value for Python
};


// NOTE(timmyliang): python2 初始化函数规范 init<module_name> 
#if PY_MAJOR_VERSION == 2
extern "C" PyMODINIT_FUNC initpy_hello()
{
return Py_InitModule3("py_hello",
  mayaPythonCExtMethods,
  MAYA_PYTHON_C_EXT_DOCSTRING);
}
// NOTE(timmyliang): python3 初始化函数规范 PyInit_<module_name> 
#elif PY_MAJOR_VERSION == 3
extern "C" PyMODINIT_FUNC PyInit_py_hello()
{
static PyModuleDef hello_module = {
PyModuleDef_HEAD_INIT,
"py_hello", // Module name to use with Python import statements
MAYA_PYTHON_C_EXT_DOCSTRING, // Module description
0,
mayaPythonCExtMethods // Structure that defines the methods of the module
};
return PyModule_Create(&hello_module);
}
#endif

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Traceback (most recent call last):
  File "d:/Obsidian/Personal/2_Area/📝Blog/CG/Maya/C++/test_load.py", line 5, in <module>
    import py_hello
ImportError: DLL load failed while importing py_hello: 找不到指定的程序。

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#include <Python.h>
#include <maya/MFnPlugin.h>
#include <maya/MGlobal.h>

const char *kAUTHOR = "TimmyLiang";
const char *kVERSION = "1.0.0";
const char *kREQUIRED_API_VERSION = "Any";

static const char HELLO_WORLD_MAYA_DOCSTRING[] = "Says hello world!";
static const char MAYA_PYTHON_C_EXT_DOCSTRING[] = "An example Python C extension that makes use of Maya functionality.";

PyObject *module = NULL;

static PyObject *pyHelloWorldMaya(PyObject *module, PyObject *args)
{
const char *inputString;
if (!PyArg_ParseTuple(args, "s", &inputString)) {
return NULL;
}
PyGILState_STATE pyGILState = PyGILState_Ensure();
MGlobal::displayInfo(inputString);
PyObject *result = Py_BuildValue("s", inputString);
PyGILState_Release(pyGILState);
return result;
}

static PyMethodDef mayaPythonCExtMethods[] = {
{"hello_world_maya", pyHelloWorldMaya, METH_VARARGS, HELLO_WORLD_MAYA_DOCSTRING},
{NULL, NULL, 0, NULL}
};

MStatus initializePlugin(MObject obj)
{
MFnPlugin plugin(obj, kAUTHOR, kVERSION, kREQUIRED_API_VERSION);
if (!Py_IsInitialized())
Py_Initialize();

if (Py_IsInitialized())
{
PyGILState_STATE pyGILState = PyGILState_Ensure();

// NOTE(TimmyLiang): python2 直接初始化模块就不会变成 built-in 模块
#if PY_MAJOR_VERSION == 2
module = Py_InitModule3("mll_py",
mayaPythonCExtMethods,
MAYA_PYTHON_C_EXT_DOCSTRING);
// NOTE(TimmyLiang): python3 用官方的方式添加模块不行，可能是因为 Py_Initialize 已经执行了
#elif PY_MAJOR_VERSION == 3
// NOTE(TimmyLiang): 参考 https://github.com/LinuxCNC/linuxcnc/issues/825 将模块加到 sys.modules 里面
static PyModuleDef hello_module = {
PyModuleDef_HEAD_INIT,
"mll_py", // Module name to use with Python import statements
MAYA_PYTHON_C_EXT_DOCSTRING, // Module description
0,
mayaPythonCExtMethods // Structure that defines the methods of the module
};

module = PyModule_Create(&hello_module);
PyObject *sys_modules = PyImport_GetModuleDict();
PyDict_SetItemString(sys_modules, "mll_py", module);
#endif
MGlobal::displayInfo("Registered Python bindings!");
if (module == NULL)
{
return MStatus::kFailure;
}
    // NOTE(timmyliang): 增加引用计数(确保不会 gc)
Py_INCREF(module);
PyGILState_Release(pyGILState);
}
return MStatus::kSuccess;
}

MStatus uninitializePlugin(MObject obj)
{
MStatus status;
  // NOTE(timmyliang): 减少引用计数
Py_DECREF(module);
return status;
}

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#include <Python.h>
#include <maya/MGlobal.h>
#include <stdio.h>
#include <pybind11/pybind11.h>

// https://zhuanlan.zhihu.com/p/80884925
void displayInfo(char *inputString)
{
MGlobal::displayInfo(inputString);
return;
}

PYBIND11_MODULE( pybind11cpp, m ){
    m.doc() = "pybind11 example";
    m.def("display_info", &displayInfo, "Maya Display Info" ,pybind11::arg("inputString") = "hello world!");
}

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find_package(Pybind11 REQUIRED) 

project(pybind11cpp) #project name


file(GLOB SRCS "pybind11/*.cpp" "pybind11/*.h")

include_directories(${MAYA_INCLUDE_DIR} ${MAYA_PYTHON_INCLUDE_DIR} ${PYBIND11_INCLUDE_DIR})

link_directories(${MAYA_LIBRARY_DIR}) #specifies a directory where a linker should search for libraries

add_library(${PROJECT_NAME} SHARED ${SRCS}) #Add a dynamic library to the project using the specified source files

# pybind11_add_module(${PROJECT_NAME} ${SRCS})

target_link_libraries(${PROJECT_NAME} ${MAYA_LIBRARIES}) #specifies list of libraries to use when linking the terget and its dependents

if(${MAYA_VERSION} GREATER 2020) 
    set(PYBIND_LINK_FLAGS "/export:PyInit_pybind11cpp")
else() 
    set(PYBIND_LINK_FLAGS "/export:initpybind11cpp")
endif()

set_target_properties(${PROJECT_NAME} PROPERTIES
    LINK_FLAGS ${PYBIND_LINK_FLAGS}
    SUFFIX ".pyd"
)

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C:/EpicGames/git/UnrealEngine-4.27/Engine/Binaries/DotNET/UnrealBuildTool.exe  -projectfiles -project="D:/EpicGames/test_plugin/test_plugin.uproject" -game -engine -progress -log="D:\EpicGames\test_plugin/Saved/Logs/UnrealVersionSelector-2022.07.12-15.50.08.log"

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D:/EpicGames/UE_4.27/Engine/Binaries/DotNET/UnrealBuildTool.exe Development Win64 -Project="D:/EpicGames/Unreal_Playground/Unreal_Playground.uproject" -TargetType=Editor -Progress -NoEngineChanges -NoHotReloadFromIDE

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.
├── logic
│   ├── logic.cpp                  dll 代码逻辑
│   └── logic.h
├── maya_deformer
│   ├── deformer_platform.cpp      调用 <windows.h> API 加载 dll
│   ├── deformer_platform.h
│   ├── deformer.cpp               Maya 变形器 deform 调用 deform_platform 提供的方法
│   ├── deformer.h
│   ├── plugin_main.cpp            Maya mll 插件初始化函数
│   └── plugin_main.h
├── scripts
│   └── test_deformer.py           测试插件是否修改
├── CMakeLists.txt
└── readme.md

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static MString kPluginLogicLibraryPath;
static DeformerLogicLibrary kLogicLibrary;

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extern MString kPluginLogicLibraryPath;
extern DeformerLogicLibrary kLogicLibrary;

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doit c -p weightDriver -v 2020

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doit c -p IngoClemens/weightDriver
doit c -p weightDriver

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cmake -Wno-dev -G "Visual Studio 16 2019" -DMAYA_VERSION={version} -DMAYA_PROJECT={project}. -B build

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cmake --build build --config Release

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# 设置输出目录
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_RELEASE ${CMAKE_RUNTIME_OUTPUT_DIRECTORY_RELEASE}/maya${MAYA_VERSION})

# 设置项目名称 (一般编译的文件名取项目名)
project({{cookiecutter.project_name}})

# 添加编译的文件
file(GLOB SRCS "*.cpp" "*.h")

# 添加头文件依赖
include_directories(${MAYA_INCLUDE_DIR}) 
# 添加 lib 库目录
link_directories(${MAYA_LIBRARY_DIR}) 
# 链接源码
add_library(${PROJECT_NAME} SHARED ${SRCS}) 
# 链接 lib
target_link_libraries(${PROJECT_NAME} ${MAYA_LIBRARIES}) 

# mll 输出配置
MAYA_PLUGIN(${PROJECT_NAME})

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cmake_minimum_required(VERSION 2.8)

# include the project setting file
include($ENV{DEVKIT_LOCATION}/cmake/pluginEntry.cmake)

# specify project name
set(PROJECT_NAME helloCmd)

# set SOURCE_FILES
set(SOURCE_FILES
   helloCmd.cpp

)

# set linking libraries
set(LIBRARIES
     OpenMaya
     Foundation
)

# Build plugin
build_plugin()

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set DEVKIT_LOCATION=F:\maya_devkit\devkitBase
cmake -G "Visual Studio 16 2019" . -B build
cmake --build build --config Release