Hi,in another post I found a way to achieve my goal of converting the coordinate position to camera space and then scaling it to a small size so that he appears first.

this is new code:

def Draw(self,op, drawpass, bd, bh):
    
    
    if not op[c4d.S_MOTIONTRAIL_GTWO_DRAWENABLE]:
        return c4d.DRAWRESULT_OK
    #bd.SetMatrix_Matrix(None, c4d.Matrix())
    pmg = ~bd.GetMg()
    bd.SetMatrix_Camera()

    all_pos = self.parameters['all_pos']
    color_lis = self.parameters['color_lis']
    point_size = op[c4d.S_MOTIONTRAIL_GTWO_POINTSIZE]
    bd.SetPointSize(point_size)
    for per_pos,color in zip(all_pos,color_lis):
        bd.SetPen(color)
        cnt = len(per_pos)
        temp_lis = []
        for i in xrange(cnt-1):
            c = (pmg * per_pos[i]).GetNormalized() * 20
            f = (pmg * per_pos[i+1]).GetNormalized() * 20
            bd.DrawLine(c,f,c4d.NOCLIP_D)
            temp_lis.append(c)
        temp_lis.append(f)
        bd.DrawPoints(temp_lis)
    

    return c4d.DRAWRESULT_OK

why * 20 will work, * 1or 2 not work (c = (pmg * per_pos[i]).GetNormalized() * 20)?

@r_gigante @zipit
The detailed explanation is shown below
“up interpolattion”


Try use "spline trail"

I read some papers, but always been very slow, just only expanded know, such as Frenet–Serret formulas etc. But I did not directly find a better way to replace my current method, and I have been looking for it.

Computation of Rotation Minimizing Frames This seems to be a good paper, I will read it carefully.

@m_adam Thank you for your team's reply.
I will share my exploration in this post in the future.:relaxed:

The problem has been resolved, reinstall the graphics driver and perform a custom clean installation！

try use GetDirty(DIRTYFLAGS_CACHE)，compare last dirty and current dirty

Hi,
you can read this thread

Hi,
i read python sdk BaseContainer.FindIndex() return a bool but actually return a dict

This is the sample code, I tried to dynamically create the element inside the group to achieve, the picture is not drawn completely as expected：

import c4d
import os
import sys
from c4d import gui,bitmaps,plugins,utils,modules,storage


PLUGIN_ID = 10000000 #only for test



GROUP_SCROLL = 1100
USEEAREA_GROUP = 1102
USERAREA = 1101

ADD_BUTTON = 1200

class PreViewArea(gui.GeUserArea):
    bmp = None


    def DrawMsg(self,x1, y1, x2, y2, msg):
        self.OffScreenOn()
        self.SetClippingRegion(x1, y1, x2, y2)
        BG_colorDict = self.GetColorRGB(c4d.COLOR_BG)
        BG_color = c4d.Vector(BG_colorDict['r'], BG_colorDict['g'], BG_colorDict['b']) / 255.0
        self.DrawSetPen(BG_color)
        self.DrawRectangle(x1, y1, x2, y2)

        if self.bmp:
            width = self.bmp.GetBw()
            height = self.bmp.GetBh()
            self.DrawBitmap(self.bmp, 0, 0, width, height, 0, 0, width, height, c4d.BMP_NORMAL)

def dynamic_Group(dialog,ua):
    dialog.LayoutFlushGroup(USEEAREA_GROUP)

    if ua.bmp:
        width = ua.bmp.GetBw()
        height = ua.bmp.GetBh()
    else:
        width,height = 0,0
    dialog.AddUserArea(USERAREA, c4d.BFH_SCALE | c4d.BFV_SCALE,width,height)
    dialog.AttachUserArea(ua, USERAREA)
    dialog.LayoutChanged(USEEAREA_GROUP)

class S_Lib_Dialog(gui.GeDialog):
    ua = PreViewArea()


    def CreateLayout(self):
        self.SetTitle("test")
        self.ScrollGroupBegin(PLUGIN_ID, c4d.BFH_SCALEFIT | c4d.BFV_SCALEFIT, c4d.SCROLLGROUP_HORIZ | c4d.SCROLLGROUP_VERT)
        self.GroupBegin(USEEAREA_GROUP,c4d.BFH_LEFT | c4d.BFV_TOP,1,1)
        self.GroupBorder(c4d.BORDER_ACTIVE_1)
        self.AddUserArea(USERAREA, c4d.BFH_SCALEFIT | c4d.BFV_SCALEFIT)
        self.AttachUserArea(self.ua, USERAREA)
        self.GroupEnd()

        self.GroupEnd()
        self.AddButton(ADD_BUTTON,c4d.BFH_SCALEFIT,150,30,"Load image")


        return True

    def Command(self, id, msg):
        if id == ADD_BUTTON:
            path = storage.LoadDialog(type=c4d.FILESELECTTYPE_IMAGES)
            if path:
                bmp = bitmaps.BaseBitmap()
                result,ismovie = bmp.InitWith(path)
                if result == c4d.IMAGERESULT_OK:
                    self.ua.bmp = bmp
                    dynamic_Group(self, self.ua)
                    self.ua.Redraw()
                else:
                    print("Load image Fail")
            else:
                print("Not select image")



            return True

        return True






class S_Lib(plugins.CommandData):

    dialog = None

    def Execute(self,doc):
        # create the dialog
        if self.dialog is None:
            self.dialog = S_Lib_Dialog()

        return self.dialog.Open(dlgtype=c4d.DLG_TYPE_ASYNC, pluginid=PLUGIN_ID, defaultw=800, defaulth=400)

    def RestoreLayout(self, sec_ref):
        # manage nonmodal dialog
        if self.dialog is None:
            self.dialog = S_Lib_Dialog()

        return self.dialog.Restore(pluginid=PLUGIN_ID, secret=sec_ref)


# Execute main()
if __name__=='__main__':
    path, fn = os.path.split(__file__)
    plugins.RegisterCommandPlugin(id=PLUGIN_ID,
                                  str="test",
                                  info=0,
                                  help="",
                                  dat=S_Lib(),
                                  icon=None)

@ferdinand Thanks，hope to fix spelling in c4dpython doc in future versions

Hi,
online and offline 2024 c4d python doc link error, not find file

@ferdinand Great job!👍

Hi,
online and offline 2024 c4d python doc link error, not find file

@ferdinand Thanks，hope to fix spelling in c4dpython doc in future versions

@fwilleke80 Thanks

@Dunhou Thanks!

Hi,
Previously, my plugin worked normally in 2023, but in 2024, the console prompted：

but,there have been no changes in the sample code for this section in the Python doc for 2024

I can only replace it with the number 2. “ menu.InsData(2, True) ”.Has there been any change in 2024？

@ferdinand Thanks for your detailed reply, it is helpful!

Hi,
How to get the Outlines of polygon objects, just like in the image.

Thanks for any help!

@i_mazlov Thanks:+1:

@ferdinand The code works very well :+1: