Best posts made by chuanzhen

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.

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)