how can i make this animation faster in MATLAB?
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Jason Robert
el 21 de Nov. de 2020
Editada: CHENG QIAN LAI
el 26 de Nov. de 2020
r = 1;
hmax = 28;
n = 1000;
h = linspace(0,hmax,n);
t = linspace(0,360,n);
k = 0;
pt = 1/6000;
x = zeros(length(h),length(t));
vx = x;
y = x;
vy = y;
a = r+h;
b = r+hmax/2*(cosd(t).^2)+hmax/2;
for i = 1:n
x(i,:) = a(i)+r.*cosd(t);
y(i,:) = b(i)+r.*sind(t);
vx(i,:) = r+r.*cosd(t);
vy(i,:) = r+h.*sind(t);
end
figure(3)
ball_bounce1= plot(x,y,'c');
axis([-1 31 -1 31])
grid on
while k < 10
if rem(k,2) == 0
for i = 1:n
set(ball_bounce1,'XData',x(i,:),'YData',y(i,:));
pause(pt)
end
end
if k > 10
break
end
end
2 comentarios
Rik
el 21 de Nov. de 2020
I'm not sure that is possible. You could replace the pause with drawnow, but that shouldn't meaningfully impact code performance. Seeing your code, I expect only lowering the requirements or increasing hardware will work. Do you need every iteration?
Respuesta aceptada
VBBV
el 21 de Nov. de 2020
Editada: VBBV
el 21 de Nov. de 2020
hmax = 25; % max height
n = 100; % make this value smaller
h = linspace(0,hmax,n);
t = linspace(0,360,n);
k = 0;
pt = 1/6000; %
...
figure(3)
ball_bounce1= plot(x,y,'c','linewidth',3);
Use the values above and try again
12 comentarios
VBBV
el 25 de Nov. de 2020
You can also use fanimator function for animating circle. See the resource below
Más respuestas (2)
per isakson
el 22 de Nov. de 2020
Editada: per isakson
el 22 de Nov. de 2020
"[...] to make a ball bounce back and forth between to walls" This is as fast as it gets - I think (with m-code)
%%
x=1;y=1;
ball_bounce1= plot(x,y,'o');
ball_bounce1.MarkerSize = 24;
axis([-1 31 -1 31])
grid on
N = 400;
for jj = 1 : N
set( ball_bounce1,'XData',jj*30/N, 'YData',jj*30/N );
drawnow
end
0 comentarios
CHENG QIAN LAI
el 26 de Nov. de 2020
Editada: CHENG QIAN LAI
el 26 de Nov. de 2020
% If you draw x,y ,you will get 1000 Line objects.
% (ball_bounce1=1000 Line obj)
ball_bounce1= plot(x,y,'c');
numel( ball_bounce1 )
% Set all line objects(ball_bounce1) to same position, this will slow down the program.
set(ball_bounce1,'XData',x(i,:),'YData',y(i,:));
r = 1;
hmax = 28;
n = 1000;
h = linspace(0,hmax,n);
t = linspace(0,360,n);
phi = linspace(0,360,50); % Reduce array elements
k = 0;
pt = 1/6000;
x = zeros(length(h),length(phi));
vx = x;
y = x;
vy = y;
a = r+h;
b = r+hmax/2*(cosd(t).^2)+hmax/2;
x = a'+ r.*cosd(phi);
y = b'+ r.*sind(phi);
%for i = 1:n
%x(i,:) = a(i)+r.*cosd(phi);
%y(i,:) = b(i)+r.*sind(phi);
%vx(i,:) = r+r.*cosd(t);
%vy(i,:) = r+h.*sind(t);
%end
figure;
ball_bounce1= plot(0,0,'c'); % ball_bounce1 = 1x1 Line
line(a,b);
axis([-1 31 -1 31])
grid on
step=1;
k=1;
while k < 10
for i = 1:step:n % You can try step = 2
set(ball_bounce1,'XData',x(i,:),'YData',y(i,:));
pause(pt) % or drawnow
end
k=k+1;
end
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