multi Texcoords for my model

Scripting Issues
1

How to add few texcoords for one vertex? I did a simple cube.

        geom_format = GeomVertexFormat.getV3n3c4t2()

        vdata = GeomVertexData('unnamed_cube', geom_format, Geom.UHStatic)

        vdata.setNumRows(8)

        vertex = GeomVertexWriter(vdata, 'vertex')
        normal = GeomVertexWriter(vdata, 'normal')
        color = GeomVertexWriter(vdata, 'color')
        texcoord = GeomVertexWriter(vdata, 'texcoord')

        vertex.addData3f(-x, -y, -z)  # 0
        normal.addData3f(0, 0, 1)
        color.addData4f(1, 0, 0, 1)
        texcoord.addData2f(0.25, 0.33)

        vertex.addData3f(x, -y, -z)  # 1
        normal.addData3f(0, 0, 1)
        color.addData4f(1, 0, 0, 1)
        texcoord.addData2f(0.5, 0.33)

        vertex.addData3f(x, y, -z)  # 2
        normal.addData3f(0, 0, 1)
        color.addData4f(1, 0, 0, 1)
        texcoord.addData2f(0.5, 0.66)

        vertex.addData3f(-x, y, -z)  # 3
        normal.addData3f(0, 0, 1)
        color.addData4f(1, 0, 0, 1)
        texcoord.addData2f(0.25, 0.66)

        vertex.addData3f(-x, -y, z)  # 4
        normal.addData3f(0, 0, 1)
        color.addData4f(1, 0, 0, 1)
        texcoord.addData2f(0.0, 0.33)
        texcoord.addData2f(1.0, 0.33)
        texcoord.addData2f(0.25, 0.0)


        vertex.addData3f(x, -y, z)  # 5
        normal.addData3f(0, 0, 1)
        color.addData4f(1, 0, 0, 1)
        texcoord.addData2f(0.75, 0.33)
        texcoord.addData2f(0.5, 0.0)

        vertex.addData3f(x, y, z)  # 6
        normal.addData3f(0, 0, 1)
        color.addData4f(1, 0, 0, 1)
        texcoord.addData2f(0.75, 0.66)
        texcoord.addData2f(0.5, 1.0)

        vertex.addData3f(-x, y, z)  # 7
        normal.addData3f(0, 0, 1)
        color.addData4f(1, 0, 0, 1)
        texcoord.addData2f(1.0, 0.66)
        texcoord.addData2f(0.0, 0.66)
        texcoord.addData2f(0.25, 1.0)

        primitive = GeomTriangles(Geom.UHStatic)

        primitive.addVertices(0, 4, 5)  # 1
        primitive.addVertices(0, 5, 1)  # 2
        primitive.addVertices(1, 5, 6)  # 3
        primitive.addVertices(1, 6, 2)  # 4
        primitive.addVertices(2, 6, 7)  # 5
        primitive.addVertices(2, 7, 3)  # 6
        primitive.addVertices(3, 7, 4)  # 7
        primitive.addVertices(3, 4, 0)  # 8
        primitive.addVertices(4, 7, 6)  # 9
        primitive.addVertices(4, 6, 5)  # 10
        primitive.addVertices(3, 0, 1)  # 11
        primitive.addVertices(3, 1, 2)  # 12

        primitive.closePrimitive()

        geom = Geom(vdata)
        geom.addPrimitive(primitive)

        self.node = GeomNode('gnode')
        self.node.addGeom(geom)
2

You can define your own GeomVertexFormat and add the columns for the additional texture coordinate sets to its array:

            array = GeomVertexArrayFormat()
            array.add_column(InternalName.make("vertex"), 3, Geom.NT_float32, Geom.C_point)
            array.add_column(InternalName.make("normal"), 3, Geom.NT_float32, Geom.C_normal)
            array.add_column(InternalName.make("color"), 4, Geom.NT_float32, Geom.C_color)
            array.add_column(InternalName.make("texcoord"), 2, Geom.NT_float32, Geom.C_texcoord)

            # add additional texture coordinate sets
            for i in range(3):
                array.add_column(InternalName.make("texcoord.%d" % (i+1)), 2, Geom.NT_float32, Geom.C_texcoord)

            geom_format = GeomVertexFormat()
            geom_format.add_array(array)
            geom_format = GeomVertexFormat.register_format(geom_format)

            vdata = GeomVertexData('unnamed_cube', geom_format, Geom.UHStatic)

            vdata.setNumRows(8)

            vertex = GeomVertexWriter(vdata, 'vertex')
            normal = GeomVertexWriter(vdata, 'normal')
            color = GeomVertexWriter(vdata, 'color')
            texcoord = GeomVertexWriter(vdata, 'texcoord')
            texcoord1 = GeomVertexWriter(vdata, 'texcoord.1')
            texcoord2 = GeomVertexWriter(vdata, 'texcoord.2')
            texcoord3 = GeomVertexWriter(vdata, 'texcoord.3')
            
            ...