matlab中的用户交互动画

Question

我正在尝试在matlab中制作用户交互动画。它是一个可以在屏幕上转换和旋转的正方形，用户必须点击它。如果他们点击它，他们将获得积分，动画将重复。如果他们点击空格(例如:动画将退出并显示"YOU LOSE"。我已经用两个函数完成了动画。一个用于创建动画，另一个用于注册鼠标点击。到目前为止，我可以识别鼠标点击和动画将停止，如果用户单击空白，但动画不会重复，如果用户在多边形内单击。我不确定如何修改我的代码，使动画将重复，直到用户单击空白。我把我的代码粘贴在下面。如有任何帮助，我将不胜感激。

动画功能:

function movingPolygon
global gUserHitPolygon;
global gCurrentXVertices;
global gCurrentYVertices;
gUserHitPolygon = true;
nSides =4;
%Polar points
r=1;
theta = pi/nSides * (1:2:2*nSides-1);
%Cartesisn points
x0 = r * cos(theta);
y0 = r * sin(theta);
nFrames = 100;
xx = linspace(0,10, nFrames);
yy = xx;
rr = linspace(0, 2*pi, nFrames);
h = figure;
set(h,'WindowButtonDownFcn',   @mouseDownCallback);
for i = 1:nFrames
    rX = [cos(rr(i)), -sin(rr(i))];
    rY = [sin(rr(i)), cos(rr(i))];
    x1 = rX * [x0; y0];
    y1 = rY * [x0; y0];
    x2= x1 + xx(i);
    y2= y1 + yy(i);
    gCurrentXVertices=x2;
    gCurrentYVertices=y2;
    y=fill(x2, y2, 'b');
    xlim([0,10]); ylim([0,10]);
    hold on;
    pause(0.000000003);
    if ~gUserHitPolygon
        clear GLOBAL gUserHitPolygon gCurrentXVertices gCurrentYVertices;
        break;
    end
    delete(y);
end
end

回调函数:

function mouseDownCallback(~,~)
global UserHitPolygon;
global CurrentXVertices;
global CurrentYVertices;

xVertices = gCurrentXVertices;
yVertices = gCurrentYVertices;
% if we have valid (so non-empty) sets of x- and y-vertices then...
if ~isempty(xVertices) && ~isempty(yVertices)
    % get the coordinate on the current axis
    coordinates = get(gca,'CurrentPoint');
    coordinates = coordinates(1,1:2);
    % if the coordinate is not in the polygon, then change the
    % flag
    if ~inpolygon(coordinates(1),coordinates(2),xVertices,yVertices)
       gUserHitPolygon = false;
    end
end
end

编辑:修正了回调函数中的一些错误

Answer 1

简短回答

在while循环中包含动画

长回答

无论用户做什么，动画都只会播放一次，因为它不知道要重复。这个问题的答案是使用while循环，它会重复你的动画，直到你告诉它停止。主循环变成

done = false; % your stopping condition
while ~done
    for i = 1:nFrames
        rX = [cos(rr(i)), -sin(rr(i))];
        rY = [sin(rr(i)), cos(rr(i))];
        x1 = rX * [x0; y0];
        y1 = rY * [x0; y0];
        x2= x1 + xx(i);
        y2= y1 + yy(i);
        gCurrentXVertices=x2;
        gCurrentYVertices=y2;
        y=fill(x2, y2, 'b');
        xlim([0,10]); ylim([0,10]);
        hold on;
        pause(0.000000003);
        if ~gUserHitPolygon
            clear GLOBAL gUserHitPolygon gCurrentXVertices gCurrentYVertices;
            done = true; % set your stopping condition
            break;
        end
        delete(y);
    end
end