operators.py

                            point.co = spline_points[key][j][0]
                        point = spline.points[-1]
                        point.co = spline_points[key][i][0]
                        num=i

        return {'FINISHED'}

class SeparateOutline(bpy.types.Operator):
    bl_idname = "curvetools.sep_outline"
    bl_label = "Separate Outline"
    bl_options = {'REGISTER', 'UNDO'}
    bl_description = "Makes 'Outline' separate mesh"

    @classmethod
    def poll(cls, context):
        return util.Selected1OrMoreCurves()

    def execute(self, context):
        bpy.ops.object.mode_set(mode = 'EDIT')
        bpy.ops.curve.separate()

        return {'FINISHED'}

class CurveBoolean(bpy.types.Operator):
    bl_idname = "curvetools.bezier_curve_boolean"
    bl_description = "Curve Boolean"
    bl_label = "Curve Boolean"
    bl_options = {'REGISTER', 'UNDO'}

    operation: bpy.props.EnumProperty(name='Type', items=[
        ('UNION', 'Union', 'Boolean OR', 0),
        ('INTERSECTION', 'Intersection', 'Boolean AND', 1),
        ('DIFFERENCE', 'Difference', 'Active minus Selected', 2),
    ])
    number : IntProperty(
            name="Spline Number",
            default=1,
            min=1,
            description="Spline Number"
            )

    @classmethod
    def poll(cls, context):
        return util.Selected1OrMoreCurves()

    def draw(self, context):
        layout = self.layout

        # general options
        col = layout.column()
        col.prop(self, "operation")
        if self.operation == 'DIFFERENCE':
            col.prop(self, "number")

    def execute(self, context):
        current_mode = bpy.context.object.mode

        if bpy.ops.object.mode_set.poll():
            bpy.ops.object.mode_set(mode = 'OBJECT')

        selected_Curves = util.GetSelectedCurves()
        len_selected_curves = len(selected_Curves)
        if len_selected_curves < 2:
            return {'FINISHED'}

        min_number = 1

        max_number = 0
        for iCurve in range(0, len_selected_curves):
            len_splines = len(selected_Curves[iCurve].data.splines)
            max_number += len_splines

        if self.number < min_number:
            self.number = min_number
        if self.number > max_number:
            self.number = max_number

        j = 0
        first_curve = 0
        first_spline = 0
        for iCurve in range(0, len_selected_curves):
            len_splines = len(selected_Curves[iCurve].data.splines)
            for iSpline in range(0, len_splines):
                if j == self.number:
                    first_curve = iCurve
                    first_spline = iSpline
                j += 1

        bpy.ops.object.select_all(action='DESELECT')

        spline1 = selected_Curves[first_curve].data.splines[first_spline]
        matrix_world1 = selected_Curves[first_curve].matrix_world

        len_spline1 = len(spline1.bezier_points)

        dataCurve = bpy.data.curves.new(self.operation, type='CURVE')
        dataCurve.dimensions = '2D'
        newSpline1 = dataCurve.splines.new(type='BEZIER')
        newSpline1.use_cyclic_u = True
        newSpline1.bezier_points.add(len_spline1 - 1)
        for n in range(0, len_spline1):
            newSpline1.bezier_points[n].co = matrix_world1 @ spline1.bezier_points[n].co
            newSpline1.bezier_points[n].handle_left_type = spline1.bezier_points[n].handle_left_type
            newSpline1.bezier_points[n].handle_left = matrix_world1 @ spline1.bezier_points[n].handle_left
            newSpline1.bezier_points[n].handle_right_type = spline1.bezier_points[n].handle_right_type
            newSpline1.bezier_points[n].handle_right = matrix_world1 @ spline1.bezier_points[n].handle_right

        Curve = object_utils.object_data_add(context, dataCurve)
        bpy.context.view_layer.objects.active = Curve
        Curve.select_set(True)
        Curve.location = (0.0, 0.0, 0.0)

        j = 0
        for iCurve in range(0, len_selected_curves):
            matrix_world = selected_Curves[iCurve].matrix_world
            len_splines = len(selected_Curves[iCurve].data.splines)
            for iSpline in range(0, len_splines):
                if iCurve == first_curve and iSpline == first_spline:
                    continue
                spline = selected_Curves[iCurve].data.splines[iSpline]
                len_spline = len(spline.bezier_points)
                newSpline = dataCurve.splines.new(type='BEZIER')
                newSpline.use_cyclic_u = True
                newSpline.bezier_points.add(len_spline - 1)
                for n in range(0, len_spline):
                    newSpline.bezier_points[n].co = matrix_world @ spline.bezier_points[n].co
                    newSpline.bezier_points[n].handle_left_type = spline.bezier_points[n].handle_left_type
                    newSpline.bezier_points[n].handle_left = matrix_world @ spline.bezier_points[n].handle_left
                    newSpline.bezier_points[n].handle_right_type = spline.bezier_points[n].handle_right_type
                    newSpline.bezier_points[n].handle_right = matrix_world @ spline.bezier_points[n].handle_right

                bpy.ops.object.mode_set(mode = 'EDIT')
                bpy.ops.curve.select_all(action='SELECT')
                splines = internal.getSelectedSplines(True, True)
                if len(splines) < 2:
                   continue
                splineA = splines[0]
                splineB = splines[1]
                dataCurve.splines.active = newSpline1

                if not internal.bezierBooleanGeometry(splineA, splineB, self.operation):
                    self.report({'WARNING'}, 'Invalid selection.')
                    return {'CANCELLED'}

                j += 1

        bpy.ops.object.mode_set (mode = current_mode)

        return {'FINISHED'}

def register():
    for cls in classes:
        bpy.utils.register_class(operators)

def unregister():
    for cls in classes:
        bpy.utils.unregister_class(operators)

if __name__ == "__main__":
    register()

operators = [
    OperatorCurveInfo,
    OperatorCurveLength,
    OperatorSplinesInfo,
    OperatorSegmentsInfo,
    OperatorOriginToSpline0Start,
    OperatorIntersectCurves,
    OperatorLoftCurves,
    OperatorSweepCurves,
    OperatorBirail,
    OperatorSplinesSetResolution,
    OperatorSplinesRemoveZeroSegment,
    OperatorSplinesRemoveShort,
    OperatorSplinesJoinNeighbouring,
    ConvertSelectedFacesToBezier,
    ConvertBezierToSurface,
    BezierPointsFillet,
    BezierDivide,
    CurveScaleReset,
    Split,
    SeparateOutline,
    CurveBoolean,
    ]