Manufacturing Toolkit: sheet_metal/feature_recognizer/feature_recognizer.py

# $Id$

#

# Copyright (C) 2008-2014, Roman Lygin. All rights reserved.

# Copyright (C) 2014-2025, CADEX. All rights reserved.

#

# This file is part of the Manufacturing Toolkit software.

#

# You may use this file under the terms of the BSD license as follows:

#

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions are met:

# * Redistributions of source code must retain the above copyright notice,

#   this list of conditions and the following disclaimer.

# * Redistributions in binary form must reproduce the above copyright notice,

#   this list of conditions and the following disclaimer in the documentation

#   and/or other materials provided with the distribution.

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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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from functools import cmp_to_key


import manufacturingtoolkit.CadExMTK  as mtk


class Pair:

    def __init__(self, theFirst: float, theSecond: float):

        self.First = theFirst

        self.Second = theSecond


    def __repr__(self):

        return f"Pair({self.First}, {self.Second})"


    def __str__(self):

        return f"{self.First:.5f} x {self.Second:.5f}"


class Dimension:

    def __init__(self, theX: float, theY: float, theZ: float):

        self.X = theX

        self.Y = theY

        self.Z = theZ


    def __repr__(self):

        return f"Dimension({self.X}, {self.Y}, {self.Z})"


    def __str__(self):

        return f"{self.X:.5f} x {self.Y:.5f} x {self.Z:.5f}"


class Direction:

    def __init__(self, theX: float, theY: float, theZ: float):

        self.X = theX

        self.Y = theY

        self.Z = theZ


    def __repr__(self):

        return f"Direction({self.X}, {self.Y}, {self.Z})"


    def __str__(self):

        return f"({self.X:.2f}, {self.Y:.2f}, {self.Z:.2f})"


def CompareFeatures(theA: mtk.MTKBase_Feature, theB: mtk.MTKBase_Feature):

    aComparator = mtk.MTKBase_FeatureComparator()

    anALessThanB = aComparator(theA, theB)

    if anALessThanB:

        return -1


    aBLessThanA = aComparator(theB, theA)

    if aBLessThanA:

        return 1


    return 0


class FeatureGroupManager:

    def __init__(self):

        self.__myGroups = []


    def AddFeature(self, theGroupName: str, theSubgroupName: str, theHasParameters: bool, theFeature: mtk.MTKBase_Feature):

        #find or create

        aRes = -1

        for i in range(len(self.__myGroups)):

            aGroup = self.__myGroups[i]

            if aGroup.myName == theGroupName:

                aRes = i

                break


        if aRes == -1:

            self.__myGroups.append(self.FeatureGroup(theGroupName, theSubgroupName, theHasParameters))

            aRes = len(self.__myGroups) - 1


        #update

        aGroup = self.__myGroups[aRes]

        aSubgroups = aGroup.myFeatureSubgroups

        aSubgroups.Append(theFeature)


    def Print(self, theFeatureType: str, thePrintFeatureParameters):

        self.__myGroups.sort(key=cmp_to_key(self.__compare))


        aTotalCount = 0

        for i in self.__myGroups:

            aFeatureCount = i.FeatureCount()

            aTotalCount += aFeatureCount


            print("    ", i.myName, ": ", aFeatureCount, sep="")


            if not i.myHasParameters:

                continue


            aSubgroupName = i.mySubgroupName

            for j in range(i.myFeatureSubgroups.Size()):

                print("        ", i.myFeatureSubgroups.GetFeatureCount(j), " ", aSubgroupName, " with", sep="")

                thePrintFeatureParameters(i.myFeatureSubgroups.GetFeature(j))


        print("\n    Total ", theFeatureType, ": ", aTotalCount, "\n", sep="")


    @staticmethod

    def PrintFeatureParameter(theName: str, theValue, theUnits: str):

        print("          ", theName, ": ", theValue, " ", theUnits, sep = "")


    class OrderedFeatureList:

        def __init__(self):

            self.__myList = []


        def Append(self, theFeature: mtk.MTKBase_Feature):

            anInsertIndex = 0

            for i in self.__myList:

                aRes = CompareFeatures(theFeature, i.Feature)

                if aRes == 0:

                    i.Count += 1

                    anInsertIndex = -1

                    break

                elif aRes < 0:

                    break


                anInsertIndex += 1


            if anInsertIndex >= 0:

                self.__myList.insert(anInsertIndex, self.FeatureAndCountPair(theFeature))


        def Size(self):

            return len(self.__myList)


        def GetFeature(self, theIndex: int):

            return self.__GetFeatureAndCountPair(theIndex).Feature


        def GetFeatureCount(self, theIndex: int):

            return self.__GetFeatureAndCountPair(theIndex).Count


        def __GetFeatureAndCountPair(self, theIndex: int):

            return self.__myList[theIndex]


        class FeatureAndCountPair:

            def __init__(self, theFeature: mtk.MTKBase_Feature):

                self.Feature = theFeature

                self.Count = 1


    class FeatureGroup:

        def __init__(self, theName: str, theSubgroupName: str, theHasParameters: bool):

            self.myName = theName

            self.mySubgroupName = theSubgroupName

            self.myHasParameters = theHasParameters

            self.myFeatureSubgroups = FeatureGroupManager.OrderedFeatureList()


        def FeatureCount(self):

            aCount = 0

            for i in range(self.myFeatureSubgroups.Size()):

                aCount += self.myFeatureSubgroups.GetFeatureCount(i)

            return aCount


    @staticmethod

    def __compare(theA: FeatureGroup, theB: FeatureGroup):

        anAName = theA.myName

        aBName = theB.myName

        if anAName == aBName:

            return 0


        anAFeatureSubgroups = theA.myFeatureSubgroups

        aBFeatureSubgroups = theB.myFeatureSubgroups

        if (not anAFeatureSubgroups) or (not aBFeatureSubgroups):

            if anAName < aBName:

                return -1

            else:

                return 1


        anAFeature = anAFeatureSubgroups.GetFeature(0)

        aBFeature = aBFeatureSubgroups.GetFeature(0)

        return CompareFeatures(anAFeature, aBFeature)