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• # Celebrations in the MATropolis!

on 13 Nov 2023
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drawframe(1);
Write your drawframe function below
function drawframe(f)
persistent handles
if f == 1 || isempty(handles)
rng('default')
axes(colormap=gray,View=[172,22],Color='k')
hold on
camva(3)
h=randg(1,25); % building heights
b=bar3(h);
axis equal
g=.17; % height and width of windows
[m,k]=ndgrid(1:25); % (x,y) building indices
handles.w = gobjects(0);
for i=1:625 % loop through each building
% Interpolate building color according to building height
% Ideally this should be outside the loop but that would require more characters
q=b(m(i));
set(q,'CData',q.ZData,'FaceColor','interp')
for j=1:2 % loop through each column of windows
L=k(i)-.27+(j-1)*.37; % in k-a+(j-1)*b, a is the signed distance from center of building in row k(i) to left edge of window in column j and b is the interval between left edges of windows.
x=L+[0,g,g,0]'; % [L;R;R;L] edges of windows in building i, window column j
z=ones(4,1)*(.2:.4:h(i)-.2)+[0;0;g;g]; % 4xn height of windows for n levels of windows; in a:b:c a is height of first row of windows, b is the interval between window-bottoms, c is height of tallest window.
y=z*0+m(i)+.45; % 4xn location of front face of building
% Plot windows for building i, column j
for w = 1:width(z)
handles.w(end+1)=patch(z(:,w)*0+x,y(:,w),z(:,w),'y');
if rand(1) < 0.25
handles.w(end).FaceColor = 'none';
end
end
end
end
set(gcf,'color','k')
axis off
camva(2.5)
campos([58.256 185.12 25.621])
view([165,5])
clim([0 8])
xlim(xlim) % lazy way of freezing axis limits
ylim(ylim)
zlim([.8,8])
end
% randomly toggle on/off some window lights
p = 0.001; % portion (0:1) of lights to toggle
n = numel(handles.w);
idx = randperm(n,ceil(n*p));
colors = {handles.w(idx).FaceColor};
isnone = cellfun(@ischar, colors);
set(handles.w(idx(isnone)), 'FaceColor', 'y')
set(handles.w(idx(~isnone)), 'FaceColor', 'none')
% Credit to 隆光 中村 for the fireworks
% https://au.mathworks.com/matlabcentral/communitycontests/contests/6/entries/13092
if f<10 % Trail
t1 = linspace(1,7.5,15);
U = sin(0.3*t1);
h1 = 3;
plot3(U(f:f+h1)+11,U(f:f+h1)*1.3,t1(f:f+h1),'w',LineWidth=0.7);
elseif f>=20 && f<30
F = f-19;
t1 = linspace(1,6,15);
U = sin(0.3*t1);
h1 = 3;
plot3(U(F:F+h1)+7,U(F:F+h1)*1.3,t1(F:F+h1),'w',LineWidth=0.7);
end
if f>=10 % Explosion
g = 9.8;
m = 1;
v0 = 50;
k = 0.9;
t2 = linspace(0,5,38);
n = 9;
p = 10;
h = 10;
circle_theta = linspace(0,2*pi,p);
X = [11.9,7.9];
Y = [6.2,5];
c = 'mg';
D = [.07,.05];
for i = 1:2
f = f-i*9;
for j = 1:n
theta = j*2*pi*(1/n);
if f <= h
ts = t2(1:f);
elseif f >= h+1 && f <= 38-h
ts = t2(f-h:f);
elseif f >= 38-h+1 && f <= 39
ts = t2(f-h:38-h);
end
x = (m*v0/k)*(1-exp(-k*ts/m))*cos(theta);
y = (m/k)*((v0*sin(theta)+(m*g/k))*(1-exp(-k*ts/m))-g*ts);
for q = 1:p
d = D(i);
plot3(d*x*cos(circle_theta(q))+X(i),d*x*sin(circle_theta(q))+1,d*y+Y(i),'w')
plot3(d*(1/2)*x*cos(circle_theta(q))+X(i),d*(1/2)*x*sin(circle_theta(q))+1,d*(1/2)*y+Y(i),c(i))
end
end
end
end
end
Adam Danz
• ##### Celebrations in the MATropolis!
Anton Kogios