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Simple recursive maze algorithm & counting steps

This is a discussion on Simple recursive maze algorithm & counting steps within the C++ Programming forums, part of the General Programming Boards category; Hey, issue: my maze algorithm must be able to count total steps. He is not allowed to "jump" from a ...

  1. #1
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    Simple recursive maze algorithm & counting steps

    Hey,

    issue: my maze algorithm must be able to count total steps. He is not allowed to "jump" from a deadend back to the cross-way he originally came from.

    Code:
    int R2D2Turbo::findIt(Labyrinth* incLab, int x, int y)
    {
        
    
        if ((x == incLab->getExit().x) && (y == incLab->getExit().y))
        {
        return 1;
        }
    
        if (x <=0 || x >= incLab->getSize().x || y <= 0 || y >= incLab->getSize().y)
        {
        return 0;
        }
        
        if (incLab->getPoint(x, y) == '#' || track[y][x] == '+') return 0;
    
        track[y][x] = '+';
        this->steps++;
        
        if ( findIt(incLab, x, y - 1)) return 1;
        if ( findIt(incLab, x + 1, y)) return 1;
        if ( findIt(incLab, x, y + 1)) return 1;
        if ( findIt(incLab, x - 1, y)) return 1;
    
        return 0;
    }
    Give maze:
    Code:
    ### ### 
    # # # # 
    # # # # 
    #     # 
    ##### # 
    #     # 
    ### ###
    Result:
    Code:
    ###x### 
    # #x#x# 
    # #x#x# 
    #  xxx# 
    #####x# 
    #  xxx# 
    ### ###
    Total steps: 11 - he jumps from 5:1 to 5:4 and misses 3 steps.
    The required answere is 14 steps.

    Due to the nature of recursive algoirthms, he jumps instead of moving the way back from the deadend one by one...

    Any suggestion on how to get this solved is appreciated. The only solutions I could think of are way overloaded...

    Thanks in advance!

  2. #2
    and the hat of wrongness Salem's Avatar
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    Maze solving algorithm - Wikipedia, the free encyclopedia
    Perhaps you should implement "wall follower" and just count how many steps it takes.
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  3. #3
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    Thanks for the input, I already implemented a wall follower with left-hand rule and another with right-hand rule, they work like a charm. I however need a third, simple maze algorithm (as I need a total of 3 different maze algorithms).

    Now using a wall follower algorithm to count steps of my R2D2Turbo is not a satisfying solution, as the wall follower itself already is an own maze algorithm.
    Last edited by coffee_cups; 06-01-2013 at 12:24 PM.

  4. #4
    Algorithm Dissector iMalc's Avatar
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    Perhaps you could have your findIt function return the number of steps it has made.
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