Hi, I'd like to present you a simple script.
It let you automatically select all UV borders and break their Phong shading, that might be useful for game modeling, especially with hardsurface props.
More info about hard edges - http://www.polycount.com/forum/showthread.php?t=107196

Unfortunately, the 'Texture View' window must be opened at least once for properly work
Just close 'Texture View' and continue work.

Video: https://vimeo.com/317072443

Download link: https://github.com/rocketjump4d/UV2PhongEdges

Hello guys,
I rewritten script UV2PhongEdges (weird name, I know :D) from scratch. Now it should works much faster. Also UNDO finally works, yyyeeeey!

You can download it here
https://github.com/rocketjump4d/UV2PhongEdges

And here is an example
https://vimeo.com/447775062

Also, if you just need to get edges indexes of all UV borders you can use this code:

import c4d
from c4d import utils

def GetUVBorders(obj):
    edgesIndexes = set()
    abcd = tuple("abcd")

    tuvw = obj.GetTag(c4d.Tuvw)
    nbr = utils.Neighbor()
    nbr.Init(obj)

    # Create empty set for `edgesVV`
    # In this case `edgeVV` means `Edge between Vertex0 and Vertex1 (edgeVertexVertex)`
    # edgeVV is just a tuple(v0, v1), where v0 is index of the first vertex
    # and v1 is the second one
    allEdgesVV = set()

    for i in xrange(obj.GetPointCount()):
        # Find neighbor vertex for this one
        neighborIndexes = nbr.GetPointOneRingPoints(i)

        for ni in neighborIndexes:
            edgeTuple = (i, ni)
            allEdgesVV.add(edgeTuple)

    # At this point I've got a set of all `edgesVV` of the object
    # Something like this:
    # (0, 3)
    # (0, 5)
    # (5, 1)

    for edgeVV in allEdgesVV:
        # Find neighbour polygons for this edge
        # I called them polyA and polyB
        polyAIndex, polyBIndex = nbr.GetEdgePolys(edgeVV[0], edgeVV[1])
        polyA = obj.GetPolygon(polyAIndex)

        if polyBIndex is c4d.NOTOK:
            # There is no polyB. It means that this edge is border of the object

            # eiA stands for `Edge Index in polyA for current edgeVV`
            eiA = polyAIndex * 4 + polyA.FindEdge(edgeVV[0], edgeVV[1])
            edgesIndexes.add(eiA)
            continue

        polyB = obj.GetPolygon(polyBIndex)

        # piA0 stands for `Point Index in polyA for vertex edgeVV[0]`
        # the same for others
        piA0 = polyA.Find(edgeVV[0])
        piA1 = polyA.Find(edgeVV[1])
        piB0 = polyB.Find(edgeVV[0])
        piB1 = polyB.Find(edgeVV[1])

        # Replace "d" (3) to "c" (2) if polygon is triangle
        if polyA.IsTriangle() and piA0 == 3:
            piA0 = 2
        if polyA.IsTriangle() and piA1 == 3:
            piA1 = 2
        if polyB.IsTriangle() and piB0 == 3:
            piB0 = 2
        if polyB.IsTriangle() and piB1 == 3:
            piB1 = 2

        # Get UV coordinates for each point in each polygon
        uvCoordA0 = tuvw.GetSlow(polyAIndex)[abcd[piA0]]
        uvCoordA1 = tuvw.GetSlow(polyAIndex)[abcd[piA1]]
        uvCoordB0 = tuvw.GetSlow(polyBIndex)[abcd[piB0]]
        uvCoordB1 = tuvw.GetSlow(polyBIndex)[abcd[piB1]]

        if uvCoordA0 != uvCoordB0 or uvCoordA1 != uvCoordB1:
            eiA = polyAIndex * 4 + polyA.FindEdge(edgeVV[0], edgeVV[1])
            eiB = polyBIndex * 4 + polyB.FindEdge(edgeVV[0], edgeVV[1])
            edgesIndexes.add(eiA)
            edgesIndexes.add(eiB)

    return edgesIndexes

Let me know if you find bugs.
Btw, sorry any mistakes. My English is... meh

I've wrote it by myself
Its presentation is here: https://plugincafe.maxon.net/topic/11336/script-harden-edges-of-all-uv-borders-break-phong-shading
May be it'll be useful for someone
Cheers

Hi there, I have a similar problem. But I use R25 version.

If I write
exporterID[c4d.FBXEXPORT_SDS] = True or exporterID[c4d.FBXEXPORT_SDS] = False
I get error
AttributeError: parameter set failed

If I comment or remove this line, export works fine.

Maybe I should create a new topic with this issue.

Hello there

There is my main module A. It should use a module B (located in the same folder) and Python's standart module YAML (which doesn't exist by default).
Whats the best solution? Should I just download YAML and copy it to module A folder?

Right now module A is placed here

%user%\AppData\Roaming\Maxon\Maxon Cinema 4D R25\library\scripts\

I'm not sure, but maybe I should use another folder, e.g. E:\C4D_scripts and use environment variable C4DPYTHONPATH39?

How do you orginize your files and modules?

Hello guys,
where I can report a bug?

There are Bug Reports but it looks dead.

@fritz thank you very much, it works!

Roger that, thanks again.
I wasn't sure that the developers were aware. Sorry for annoy you
Cheers

Hello guys,
This bug is still exists in S24. I made a video to show how it worked before (R21) and now (S22, R23, S24).

https://vimeo.com/558586168

For test I used the script from this page. The only difference I made is decreased value from 1000.0 to 0. It's just for convenience.

This script should mirrors selected object, when settings[c4d.MDATA_MIRROR_DUPLICATE] is False. It works in R21 and doesn't work in any late releases.
Could you fix it? I'm still using R21 because of this bug

@m_magalhaes
Got it, thanks

Hi, I've just tested this script in R23. It doesn't work
One of my own scripts cannot work without this function.
Guys, you're really awesome! I love C4D, and hope you can fix it

May be I can help somehow? I can upload the example scene, if you need it.

Hello guys,
I rewritten script UV2PhongEdges (weird name, I know :D) from scratch. Now it should works much faster. Also UNDO finally works, yyyeeeey!

You can download it here
https://github.com/rocketjump4d/UV2PhongEdges

And here is an example
https://vimeo.com/447775062

Also, if you just need to get edges indexes of all UV borders you can use this code:

import c4d
from c4d import utils

def GetUVBorders(obj):
    edgesIndexes = set()
    abcd = tuple("abcd")

    tuvw = obj.GetTag(c4d.Tuvw)
    nbr = utils.Neighbor()
    nbr.Init(obj)

    # Create empty set for `edgesVV`
    # In this case `edgeVV` means `Edge between Vertex0 and Vertex1 (edgeVertexVertex)`
    # edgeVV is just a tuple(v0, v1), where v0 is index of the first vertex
    # and v1 is the second one
    allEdgesVV = set()

    for i in xrange(obj.GetPointCount()):
        # Find neighbor vertex for this one
        neighborIndexes = nbr.GetPointOneRingPoints(i)

        for ni in neighborIndexes:
            edgeTuple = (i, ni)
            allEdgesVV.add(edgeTuple)

    # At this point I've got a set of all `edgesVV` of the object
    # Something like this:
    # (0, 3)
    # (0, 5)
    # (5, 1)

    for edgeVV in allEdgesVV:
        # Find neighbour polygons for this edge
        # I called them polyA and polyB
        polyAIndex, polyBIndex = nbr.GetEdgePolys(edgeVV[0], edgeVV[1])
        polyA = obj.GetPolygon(polyAIndex)

        if polyBIndex is c4d.NOTOK:
            # There is no polyB. It means that this edge is border of the object

            # eiA stands for `Edge Index in polyA for current edgeVV`
            eiA = polyAIndex * 4 + polyA.FindEdge(edgeVV[0], edgeVV[1])
            edgesIndexes.add(eiA)
            continue

        polyB = obj.GetPolygon(polyBIndex)

        # piA0 stands for `Point Index in polyA for vertex edgeVV[0]`
        # the same for others
        piA0 = polyA.Find(edgeVV[0])
        piA1 = polyA.Find(edgeVV[1])
        piB0 = polyB.Find(edgeVV[0])
        piB1 = polyB.Find(edgeVV[1])

        # Replace "d" (3) to "c" (2) if polygon is triangle
        if polyA.IsTriangle() and piA0 == 3:
            piA0 = 2
        if polyA.IsTriangle() and piA1 == 3:
            piA1 = 2
        if polyB.IsTriangle() and piB0 == 3:
            piB0 = 2
        if polyB.IsTriangle() and piB1 == 3:
            piB1 = 2

        # Get UV coordinates for each point in each polygon
        uvCoordA0 = tuvw.GetSlow(polyAIndex)[abcd[piA0]]
        uvCoordA1 = tuvw.GetSlow(polyAIndex)[abcd[piA1]]
        uvCoordB0 = tuvw.GetSlow(polyBIndex)[abcd[piB0]]
        uvCoordB1 = tuvw.GetSlow(polyBIndex)[abcd[piB1]]

        if uvCoordA0 != uvCoordB0 or uvCoordA1 != uvCoordB1:
            eiA = polyAIndex * 4 + polyA.FindEdge(edgeVV[0], edgeVV[1])
            eiB = polyBIndex * 4 + polyB.FindEdge(edgeVV[0], edgeVV[1])
            edgesIndexes.add(eiA)
            edgesIndexes.add(eiB)

    return edgesIndexes

Let me know if you find bugs.
Btw, sorry any mistakes. My English is... meh

Hello guys,
It's something weird with MCOMMAND_MIRROR in S22.

This script (thanks to m_adam) duplicates and mirrors the object.

import c4d


def main():
    # Checks if selected object is valid
    if op is None:
        raise ValueError("op is none, please select one object.")

    # Defines some general settings, take care MDATA_MIRROR_VALUE, MDATA_MIRROR_SYSTEM and MDATA_MIRROR_PLANE
    settings = c4d.BaseContainer()
    settings[c4d.MDATA_MIRROR_DUPLICATE] = True
    settings[c4d.MDATA_MIRROR_SELECTIONS] = True
    settings[c4d.MDATA_MIRROR_ONPLANE] = True
    settings[c4d.MDATA_MIRROR_WELD] = True
    settings[c4d.MDATA_MIRROR_TOLERANCE] = 0.01

    # Corresponds to MDATA_MIRROR_VALUE, MDATA_MIRROR_SYSTEM and MDATA_MIRROR_PLANE
    value = 1000.0
    system = 0 # 0 = Object, 1 = World
    plane = 1 # 0 = XY, 1 = ZY, 2 = XZ

    if not 0 <= system < 2:
        raise ValueError("System can only be 0 or 1")

    # Buffer position vector
    pos = c4d.Vector()

    # Calculates Local (Object) coordinates
    if system == 0:
        globalMatrix = op.GetMg()
        if plane == 0:
            pos = globalMatrix.v3
        elif plane == 1:
            pos = globalMatrix.v1
        elif plane == 2:
            pos = globalMatrix.v2

        settings[c4d.MDATA_MIRROR_POINT] = globalMatrix.off + pos * value
        settings[c4d.MDATA_MIRROR_VECTOR] = pos

    # Calculates World coordinates
    elif system == 1:
        if plane == 0:
            pos = c4d.Vector(0.0, 0.0, 1.0)
        elif plane == 1:
            pos = c4d.Vector(1.0, 0.0, 0.0)
        elif plane == 2:
            pos = c4d.Vector(0.0, 1.0, 0.0)

        settings[c4d.MDATA_MIRROR_POINT] = pos * value
        settings[c4d.MDATA_MIRROR_VECTOR] = pos

    # Send the Modeling Operation
    res = c4d.utils.SendModelingCommand(c4d.MCOMMAND_MIRROR,
                                        [op],
                                        c4d.MODELINGCOMMANDMODE_ALL,
                                        settings,
                                        doc)

    c4d.EventAdd()


if __name__ == "__main__":
    main()

However, if I change

settings[c4d.MDATA_MIRROR_DUPLICATE] = True

to

settings[c4d.MDATA_MIRROR_DUPLICATE] = False

Script doesn't make anything.
In R20 it works.
Is it ok? Is there any way to just mirror the object without duplicate it?

P.S. Also, if I use Mirror (https://help.maxon.net/index.html#5633) with unchecked Duplicate Points everything works (in S22).

Cinema 4D S22.118 Windows 10