Im trying to create an air hockey game in which both of the blockers are player controlled.

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Daenon 2024-4-2，19:01

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回答： Voss 2024-4-2，19:49

Im trying to figure out how to allow for simultaneous movement of the blocker patches in the figure as I want player 1 to be controlled by wasd and player 2 to be controlled by ijkl, however when trying to do so I can only move on at a time because they keep overwriting eachother.

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Answer 1

Voss 2024-4-2，19:49

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It should be feasible. Refer to the following code for one way you can control two different objects via a single key press function:

function air_hockey()
% create figure
f = figure('Name','Air Hockey','Menubar','none','Toolbar','none','IntegerHandle','off');
% create axes
ax = axes(f,'Box','on','XLim',[-1 1],'YLim',[-1 1],'XTick',[],'YTick',[]);
% puck
puck = line(ax,0,0,'Marker','.','MarkerSize',20,'Color','k');
% player 1 and 2 paddles
paddle = [ ...
    line(ax,0,0.75,'Marker','s','MarkerSize',10,'Color','b','MarkerFaceColor','b') ...
    line(ax,0,-0.75,'Marker','s','MarkerSize',10,'Color','r','MarkerFaceColor','r') ...
    ];
% how much to move the paddle on each key press
increment = 0.1;
% key press function
f.WindowKeyPressFcn = @kpf;
    function kpf(~,evt)
        
        if ~isempty(evt.Modifier)
            % modifier (ctrl, shift, etc.) pressed/held; do nothing
            return
        end
        
        % determine which player's paddle will move
        [ism,idx] = ismember(evt.Key,'wasd');
        if ism
            % some player 1 key pressed
            p_idx = 1;
        else
            [ism,idx] = ismember(evt.Key,'ijkl');
            if ism
                % some player 2 key pressed
                p_idx = 2;
            else
                % some other key pressed; do nothing
                return
            end
        end
        % current position of the paddle
        xd = get(paddle(p_idx),'XData');
        yd = get(paddle(p_idx),'YData');
        % dx and dy increments for each direction
        % (up, left, down, right - same order as 'wasd' and 'ijkl' above)
        dxy = [0 1; -1 0; 0 -1; 1 0]*increment;
        
        % move the paddle
        set(paddle(p_idx),'XData',xd+dxy(idx,1),'YData',yd+dxy(idx,2));
        
    end
end