will it hit 🎯 the corner 💀 ???

on 9 Nov 2023

Remix with other bouncing graphics :)

drawframe(5);

function drawframe(frame)

persistent canol theta cyflymder lliw

H = 400; % set length of field

LL = 300; % set height of field

h = 90; % set length of rectangle

ll = 60; % set height of rectangle

% Initialize position and direction

if isempty(canol) && isempty(cyflymder)

canol = [rand*(H-h)+h/2 , rand*(LL-ll)+ll/2]; % initialises a random central position within the field and not beyond walls (x and y co-ord)

theta = pi/4; % you could also use a random direction angle 2*pi*rand(1)

cyflymder = 20*[cos(theta) sin(theta)]; % the velocity vector is defined with a magnitude per frame

lliw = rand(1,3);

end

clf ; axis equal; axis off; axis equal; hold on;

plot(polyshape([0,H,H,0], [LL,LL,0,0]),'FaceColor', 'k', 'FaceAlpha', 1); % plots the 'screen'

canol = canol + cyflymder;

x = [canol(1)-h/2 , canol(1)+h/2, canol(1)+h/2, canol(1)-h/2]; % x coord of rectangle corners

y = [canol(2)+ll/2 , canol(2)+ll/2, canol(2)-ll/2, canol(2)-ll/2]; % y coord of rectangle corners

if any(x < 0) | any(x > H)

cyflymder(1) = -cyflymder(1);

end

if any(y < 0) | any(y > LL)

cyflymder(2) = -cyflymder(2);

end

for i = 1:10

if any(x < 0) | any(x > H) | any(y < 0) | any(y > LL)

canol = canol + 0.5*cyflymder;

x = [canol(1)-h/2 , canol(1)+h/2, canol(1)+h/2, canol(1)-h/2]; % x coord of rectangle corners

y = [canol(2)+ll/2 , canol(2)+ll/2, canol(2)-ll/2, canol(2)-ll/2]; % y coord of rectangle corners

lliw = rand(1,3);

end

plot(polyshape(x,y), 'FaceColor', lliw, 'FaceAlpha', 1);

end