How can I tell MATLAB to stay within coordinates of a rectangle?

I am trying to create a room with a couple obstacles in it. I want the obstacles to stay inside the room and not overlap each other. There can be anywhere between 1 and 3 obstacles that a randomly generated.

clear;
clc;

fprintf('Please select one of the following options:\n New Room\n Saved Room');
Selection1 = input('\n\n ','s');

if Selection1 == 'New Room' | Selection1 == 'New room' | Selection1 == 'new room'
    roomname = input('Please enter the name of the room:  ', 's');
    roomwidth = randi([5 20]);
    roomlength = randi([5 20]);
    rectangle('Position',[0 0 roomwidth roomlength])
    axis([-1 (roomwidth+1) -1 (roomlength+1)])

    obstaclecount = randi([1 3]);
    disp(obstaclecount);
    for i = 1:obstaclecount
        x = randi([1 5]);
        y = randi([1 5]);
        a = randi([1 5]);
        b = randi([1 5]);
        wow = rectangle('Position',[x y a b], 'LineStyle','--');
    end
end

So doing this creates a room with a couple random obstacle inside but they are not confined within any boundries so sometimes it looks good, but sometimes the obstacles go outside the room or overlap each other.

Answer 1

[Chunru]

You can use polygon/polyshape for room and obstacles. Then use "overlap" function to test if obstacles are inside the room.

doc overlaps

overlaps

Determine whether polyshape objects overlap

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Syntax

TF = overlaps(poly1,poly2)

TF = overlaps(polyvec)

Description

TF = overlaps(poly1,poly2) returns a logical array whose elements are 1 when the corresponding element pairs of two polyshape arrays with compatible sizes overlap. TF(i,j) is 1 when the ith polyshape in poly1 overlaps the jth polyshape in poly2.

example

TF = overlaps(polyvec) returns a logical array whose elements are 1 (true) when the corresponding element pairs of a vector of polyshape objects overlap. TF(i,j) is 1 when the ith polyshape in polyvec overlaps the jth polyshape.