Collision Problem (Square 2d)
显示 更早的评论
Hello there, i am trying to write some code that plots a square moving along a line with a certain velocity when the centre of the squares coordinates get within a certain tolerance the direction of the velocity becomes negative and so it 'bounces' off the wall. My code is below but the constraints in terms of direction don't seem to be working any insight would be greatly appreciated. Best Regards
fps = 20;
dt = 1/fps;
tmax = 10;
t = 0;
theta = 0;
dtheta = 1/20;
p = transpose([20,20,1]);
v = transpose([50,25,1]);
Vobj = transpose([2, -2, 1; 2,2,1; -2, 2, 1; -2, -2, 1]);
while t < tmax
x = p + t*v;
if x(1)<= 5 || x(1) >= 95
v(1)=-v(1);
elseif x(2)<= 5 || x(2) >= 95
v(2)=-v(2);
end
p = x;
% Transformations
T = [1,0,p(1);0,1,p(2);0,0,1];
S = [1+0.2*sin(2*t),0,0; 0,1+0.2*sin(2*t),0;0,0,1];
R = [cos(theta),sin(theta),0 ;-sin(theta),cos(theta),0;0,0,1];
% Application of Transformations
V = R*S*T*Vobj;
fill(V(1,:),V(2,:),'r')
hold on
axis([0,100,0,100])
hold off
shg;
pause(0.3);
% Updates
t = t + dt;
theta = theta + dtheta;
end
1 个评论
aliyah islam
2019-12-18
Did you end up figuring this problem out? If so have you still got the matlab code for it, as i have a similar problem to solve. Thanks
回答（1 个）
madhan ravi
2018-11-2
fps = 20;
dt = 1/fps;
tmax = 10;
t = 0;
x =[20,20,1];
v = [50,25,1];
ctr=1;
while t < tmax
p(ctr,:) = x + t*v;
if p(1) < 5 || p(1) > 95 || p(2) < 5 || p(2) > 95
p(ctr,:) = x + t*(-v);
else
p(ctr,:) = x + t*v;
end
plot(p(1),p(2),'o')
hold on
axis([0,100,0,100])
hold off
pause(1);
t = t + dt;
end
3 个评论
madhan ravi
2018-11-2
use counter to solve the problem
Jake Simmonds
2018-11-2
Jake Simmonds
2018-11-2
类别
在 帮助中心 和 File Exchange 中查找有关 Graphics Performance 的更多信息
2018-11-2
2019-12-18
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
