Bouncing Ball Animation Getframe
7 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Gabrielle Bartolome
am 31 Okt. 2020
Kommentiert: Alan Stevens
am 1 Nov. 2020
I don't understand what I am doing wrong. I have to create an animation of a ball bouncing. But I have to repeat a for loop for each bounce. It also plays the animation twice. Is there a simpler way of doing this? Also, is there a way to speed up the code so that the animation does not play so slowly? I was thinking that I could write a function that would call it to repeat the animation but I am not sure.
%%Animation
clc, clf, clear
g = 9.81;
theta0 = 45*pi/180;
v0=5;
t(1) = 0; x = 0; y = 0;
plot(x,y, 'o', 'MarkerFaceColor','b', 'MarkerSize', 8)
axis([0 8 0 .8]);
dt = 1/128;
M(1) = getframe
for j = 2:100
t(j) = t(j - 1) + dt;
x = v0*cos(theta0)*t(j);
y = v0*sin(theta0) * t(j) - 0.5*g*t(j)^2;
plot(x,y, 'o', 'MarkerFaceColor', 'b','markerSize', 8);
axis([0 8 0 .8]);
M(j)= getframe;
end
M(2) = getframe
t(100) = 0;
v0 = v0*.8;
for j = 101:198
t(j) = t(j - 1) + dt;
x = v0*cos(theta0)*t(j)+2.5;
y = v0*sin(theta0) * t(j) - 0.5*g*t(j)^2;
plot(x,y, 'o', 'MarkerFaceColor', 'b','markerSize', 8);
axis([0 8 0 .8]);
M(j)= getframe;
end
M(3) = getframe
v0 = v0*.8;
t(198) = 0;
for j = 199:300
t(j) = t(j - 1) + dt;
x = v0*cos(theta0)*t(j)+4;
y = v0*sin(theta0) * t(j) - 0.5*g*t(j)^2;
plot(x,y, 'o', 'MarkerFaceColor', 'b','markerSize', 8);
axis([0 8 0 .8]);
M(j)= getframe;
end
M(4) = getframe
v0 = v0*.8;
t(300) = 0;
for j = 199:300
t(j) = t(j - 1) + dt;
x = v0*cos(theta0)*t(j)+4;
y = v0*sin(theta0) * t(j) - 0.5*g*t(j)^2;
plot(x,y, 'o', 'MarkerFaceColor', 'b','markerSize', 8);
axis([0 8 0 .8]);
M(j)= getframe;
end
movie(M, 1, 1000)
0 Kommentare
Akzeptierte Antwort
Alan Stevens
am 1 Nov. 2020
Bearbeitet: Alan Stevens
am 1 Nov. 2020
Like this?
g = 9.81;
theta0 = 45*pi/180;
v0=5;
dt = 1/128;
ntimes = 400;
tend = ntimes*dt;
t = linspace(0,tend,ntimes);
vx = v0*cos(theta0);
vy = v0*sin(theta0);
x = 0; y = 0;
xmax = vx*tend;
plot(x,y, 'o', 'MarkerFaceColor','b', 'MarkerSize', 8)
axis([0 xmax 0 .8]);
M(1) = getframe;
treset = 0;
for i = 1:ntimes
x = vx*t(i);
tm = t(i) - treset;
y = vy * tm - 0.5*g*tm^2;
plot(x,y, 'o', 'MarkerFaceColor', 'b','markerSize', 8);
axis([0 xmax 0 .8]);
M(i)= getframe;
if y<0
y = 0;
vy = 0.8*vy;
treset = t(i);
end
end
close
pause(1)
movie(M, 1, 50)
4 Kommentare
Alan Stevens
am 1 Nov. 2020
It's just the total time. Just change the number of steps to change the total time.
Weitere Antworten (1)
Image Analyst
am 1 Nov. 2020
See my attached demo for creating an animation from figures. You can set the frame rate for the VideoWriter.
0 Kommentare
Siehe auch
Kategorien
Mehr zu Animation finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!