Hi Jaymie,
To create a program where circles randomly appear in each quadrant and move to a different quadrant when the "Spacebar" is pressed, you can utilize Figure Callbacks in MATLAB. Below is a sample program to help you get started:
function continuous_random_quadrant_circle_on_space()
figWidth = 800;
figHeight = 600;
% Calculate centers of each quadrant within the fixed size
centers = [
figWidth/4, figHeight/4; % Quadrant 1
3*figWidth/4, figHeight/4; % Quadrant 2
figWidth/4, 3*figHeight/4; % Quadrant 3
3*figWidth/4, 3*figHeight/4 % Quadrant 4
];
radius = 50; % Adjust as needed
% Create a figure window
fig = figure('Position', [100, 100, figWidth, figHeight]); % Set figure size
set(fig, 'Color', [1 1 1]); % Set background color to white
axis equal;
axis([0 figWidth 0 figHeight]);
set(gca, 'YDir', 'reverse'); % Reverse y-axis to match screen coordinates
set(gca, 'XTick', [], 'YTick', []); % Remove axis ticks
% Set the callback
set(fig, 'WindowKeyPressFcn', @keyPressCallback);
disp('Press the spacebar to move the circle. Press "E" to exit.');
% Initial display
updateCircle();
% Function to update circle position
function updateCircle()
if ishandle(fig)
% Randomly select one of the quadrant centers
idx = randi(4);
centerX = centers(idx, 1);
centerY = centers(idx, 2);
clf;
hold on;
axis equal;
axis([0 figWidth 0 figHeight]);
set(gca, 'YDir', 'reverse');
set(gca, 'XTick', [], 'YTick', []);
set(fig, 'Color', [1 1 1]);
% Display the circle at the randomly selected quadrant center
rectangle('Position', [centerX-radius, centerY-radius, 2*radius, 2*radius], ...
'Curvature', [1, 1], 'FaceColor', 'r');
disp(['Circle moved to Quadrant ', num2str(idx)]);
end
end
% Callback function to handle key presses
function keyPressCallback(~, event)
if strcmp(event.Key, 'space')
updateCircle();
elseif strcmp(event.Key, 'e')
disp('Exiting program...');
if ishandle(fig)
close(fig);
end
end
end
end
Output:
Please find the related documentation below for more detail:
