Well then that'll be it. Thanks a lot for all the help!
I'll definitely read the manual to get a better idea of each tag.

Here is the final, working code to anyone who reads this thread having the same problems:

def CreateNormalTag(op,polyCnt):
    """
     Creates a NormalTag on the passed PolygonObject.

    :param op: The PolygonObject that will received a normal Tag.
    :type op: c4d.PolygonObject
    :return: The created tag.
    :rtype: c4d.NormalTag
    """
    # Checks if the passed object is a polygon object.
    if not isinstance(op, c4d.PolygonObject):
        raise TypeError("op is not a c4d.PolygonObject.")
    

    # Creates a Normal Tag in memory only
    normalTag = c4d.NormalTag(polyCnt)
    if normalTag is None:
        raise MemoryError("Failed to creates a normal Tag.")

    # Inserts the tag to the passed object
    op.InsertTag(normalTag)

    # Notifies the object he need to update to take care of the newly created normal tag
    op.Message(c4d.MSG_UPDATE)
    return normalTag
def WriteNormalTag(tag, normalList):
    """
    Write the raw data to a Normal Tag.

    :param tag: The Normal Tag to write the data to.
    :type tag: c4d.NormalTag
    :param normalList: A list with all the raw data.
    :type normalList: list[int]
    """
    # Retrieves the write buffer array
    buffer = tag.GetLowlevelDataAddressW()
    if buffer is None:
        raise RuntimeError("Failed to retrieves internal write data for the normal tag.")

    # Translates list of short int 16 to a BitSeq (string are byte in Python 2.7)
    intArray = array.array('h')
    intArray.fromlist(normalList)
    data = intArray.tostring()
    buffer[:len(data)] = data

# Some of the data was read in a binary file/determined earlier but the variable names should be enough to tell what they are
for i in range(surfaceCount):
        # Surface triangles count
        triCount = read_ushort(c2m)
        # Surface Material Name
        materialName = read_string(c2m)
        tri_vertexgroups = {}
        tri_uvgroups = {}
        tri_normalgroups = {}
        for f in range(triCount):
            vertex = vertex1,vertex2,vertex3 # pre-loaded 3 vertex indices for current face
            uv = uv1,uv2,uv3 # pre-loaded 3 UV indices for current face
            normal = normal1,normal2,normal3 # pre-loaded 3 normal indices for current face

            # Add them to a dictionary
            tri_vertexgroups[f] = vertex
            tri_uvgroups[f] = uv
            tri_normalgroups[f] = normal

        # Create dictionary for surface's vertices
        surface_vertices = {}
        # Unique vertex index (used to avoid creating the same vertex twice)
        unique_vertex = 0

        # Create new poly
        mypoly = c4d.BaseObject(c4d.Opolygon) #Create an empty polygon object
        mypoly.SetName(materialName) 
        uv_tag = c4d.UVWTag(triCount)   
        nrm_tag = CreateNormalTag(mypoly,triCount)
        phong_tag = c4d.BaseTag(c4d.Tphong)
        phong_tag[c4d.PHONGTAG_PHONG_ANGLELIMIT]=True
        phong_tag[c4d.PHONGTAG_PHONG_ANGLE]=c4d.utils.Rad(25.5)
        phong_tag[c4d.PHONGTAG_PHONG_USEEDGES]=True
        normalList = []
        # Loop through number of triangles
        for f in range(triCount):
            # Load vertices for current triangle from the list of polygon's vertices
            tri_vertices = tri_vertexgroups[f]

            # Load each vertex of the triangle from a dictionary with all the UVs in the scene using it's index
            vertex1 = vertices_positions[tri_vertices[0]]
            vertex2 = vertices_positions[tri_vertices[1]]
            vertex3 = vertices_positions[tri_vertices[2]]

            # Check if vertex was not added already, add if not.
            if vertex1 not in surface_vertices:
                # Add vertex1 to surface(polygon object)'s dictionary, with a unique index
                surface_vertices[vertex1] = unique_vertex
                unique_vertex += 1
                # Resize our object to allow another point to be created
                mypoly.ResizeObject(unique_vertex, triCount)
                # Create new point
                mypoly.SetPoint(surface_vertices[vertex1],c4d.Vector(vertex1[0],vertex1[1],vertex1[2]))

            if vertex2 not in surface_vertices:
                surface_vertices[vertex2] = unique_vertex
                unique_vertex += 1
                mypoly.ResizeObject(unique_vertex, triCount)
                mypoly.SetPoint(surface_vertices[vertex2],c4d.Vector(vertex2[0],vertex2[1],vertex2[2]))

            if vertex3 not in surface_vertices:
                surface_vertices[vertex3] = unique_vertex
                unique_vertex += 1
                mypoly.ResizeObject(unique_vertex, triCount)
                mypoly.SetPoint(surface_vertices[vertex3],c4d.Vector(vertex3[0],vertex3[1],vertex3[2]))

            # Load UVs for current triangle from the list of polygon's UVs
            tri_uvs = tri_uvgroups[f]
            
            # Load each UV of the triangle from a dictionary with all the UVs in the scene using it's index
            uv1 = vertices_uvs[tri_uvs[0]]
            uv2 = vertices_uvs[tri_uvs[1]]
            uv3 = vertices_uvs[tri_uvs[2]]

            # Create polygon(triangle)
            mypoly.SetPolygon(f, c4d.CPolygon(surface_vertices[vertex1],surface_vertices[vertex2],surface_vertices[vertex3]))
            # Add our UV data to the UV tag
            uv_tag.SetSlow(f, c4d.Vector(uv1[0], uv1[1], 0),
                        c4d.Vector(uv2[0], uv2[1], 0),  
                        c4d.Vector(uv3[0], uv3[1], 0),  
                        c4d.Vector(0,0,0))  

            # Load normals for current triangle from the list of polygon's normals
            tri_normals = tri_normalgroups[f]

            # Load each normal of the triangle from a dictionary with all the normals in the scene using it's index
            normal1 = vertices_normals[tri_normals[0]] # Vector3 of normal direction
            normal2 = vertices_normals[tri_normals[1]]
            normal3 = vertices_normals[tri_normals[2]]
            normal4 = [0.0, 0.0, 0.0]  # Even if it's a Tri, you should pass a value.

            # Add normals to normalList
            normalList.extend(normal1)
            normalList.extend(normal2)
            normalList.extend(normal3)
            normalList.extend(normal4)
            
        # Maps data from float to int16 value
        normalListToSet = [int(normal * 32000.0) for normal in normalList]

        # Writes the previous list to the normal tag.
        WriteNormalTag(nrm_tag, normalListToSet)

        doc.InsertObject(mypoly,None,None)
        mypoly.Message(c4d.MSG_UPDATE)
        mypoly.InsertTag(uv_tag)
        mypoly.Message(c4d.MSG_UPDATE)
        mypoly.InsertTag(phong_tag)
        mypoly.Message(c4d.MSG_UPDATE)
        
        c4d.EventAdd()

Thank you once again Maxime, your help is appreciated!

@m_magalhaes said in Matrix/HPB to XYZ and vice versa:

convert the matrix to XYZ

xyz =  c4d.utils.MatrixToHPB(m, order=c4d.ROTATIONORDER_XYZGLOBAL)

# convert from radian to deg
for i in xrange(3):
    xyz[i] = c4d.utils.RadToDeg(xyz[i])

print xyz

Works perfectly. Thanks!

@m_magalhaes

I tried creating a cube and setting it's HBP manually.
HBP - 47º 0º 0º
XYZ - 0º 47º 0º

and the result is

Vector(0.82, 0, 0)
Vector(0, 0.82, 0)
Vector(0, 0.82, 0)

What I need is a result of Vector float that shows (0.0, 47.0, 0,0) (XYZ) as a result.

@m_magalhaes Hello,

You misunderstood. I'm able to get Matrix & HBP but I need XYZ. I'm looking for either MatrixToXYZ or HPBToXYZ (preferably the first one).

Thanks,
Sheilan.

Hello,

I've got some models in two different softwares, when one is using XYZ rotation and the other (cinema 4d) uses HPB/Matrix.
I couldn't find a way to get my model's XYZ via Python (only Matrix), so I'm looking to see how can I translate rotation matrix or HPB to XYZ and vice versa.

Thanks in advance,
Sheilan.

@m_magalhaes Oh yeah I forgot to add the tags. I'm using Python by the way.
You can count this post as solved.

Hello,

Is it possible to just get a tag by its name without looping through all tags and checking each name?

Thanks,
Sheilan.

Works perfectly. Thanks!

Hello,

I've got a GvNode that I can rename and control, but I'm not sure how I can delete or move it's position in Xpresso.

Thanks in advance,
Sheilan.

@Graeme Thank you very much!
@r_gigante Will do, thanks.

Hello,

I know Octane isnt related to Maxon devs, but perhaps someone knows how to do that.
Ive creates new octane material and assigned image textures, but unfortunately thats not enough. I need to access the node editor to modify those images using the nodes, but I cant seem to find anything about Octane + Python.

Thanks,
Sheilan.