How can animate my data point ?

hello...I need to plot the moving point in such a way that when this moving point go at boundary of the simulation area then it will not reflect back but it will go outside the boundary and disappear and then at the same time from the opposite direction at same angle (at which the previous point was disappeared ) ,the new point will get appear.

Here is my code,It works good but still not got the desired output so please help me for getting the output as mentioned above.....

clear all;
clc;

% ................parameters........................
MAX_X= 100;
MAX_Y =100;
NODES = 50;
tim_sim=3;
alpha=0.99;
velocity =10;
direction =60;

mean_velocity=mean(randn(5),'all');
mean_direction=mean(randn(5),'all');


%....................scan all existing nodes..................

x_tmp1=[];
y_tmp1=[];
for nb=1:NODES  
    x= (0 + (MAX_X-0)*rand);
    y= (0 + (MAX_Y-0)*rand);

 %..............node position in every instant t...........
 for t=1:tim_sim
 %...calculate the new position by using the new_formula of Gauss-Markov...
 x_tmp = x + velocity * cos(direction);
 x_tmp1=[x_tmp1 x_tmp];
 y_tmp = y + velocity * sin(direction);
 y_tmp1=[y_tmp1 y_tmp];

 normal_velocity=normrnd(0,1);
 normal_direction=normrnd(0,1);

 %..calculate the new velocity and new direction by using the newformula of
 %Gauss-Markov..
 velocity_tmp=(alpha*velocity+(1-alpha)*mean_velocity+sqrt(1-alpha*alpha)*normal_velocity);
 direction_tmp=(alpha*direction+(1-alpha)*mean_direction+sqrt(1-alpha*alpha)*normal_direction);

 % .....node bounces on the margins......
  if  (x_tmp1<0)

        x_tmp1 = -1.*x_tmp1; 
        direction = pi-direction;
        mean_direction = pi-mean_direction;
 end


 if   (x_tmp1>MAX_X)

         x_tmp1 = 2*MAX_X - x_tmp1; 
         direction = pi-direction; 
        mean_direction = pi-mean_direction;
end

if (y_tmp1<0)
         y_tmp1 = -1.*y_tmp1;
         direction = -direction; 
         mean_direction = -1*mean_direction;

end

 if (y_tmp1>MAX_Y)
         y_tmp1 = 2*MAX_Y - y_tmp1; 
         direction = -direction; 
         mean_direction = -1*mean_direction;
 end
% plot(x_tmp1,y_tmp1,'color',[0.3 0.3 1])
 end
%.......................Animation.......................
n=length(y_tmp1);
% plot(x_tmp1,y_tmp1,'*')
% axis([0 MAX_X 0 MAX_Y])
% pause(0.05)


for i=1:n
   
     plot(x_tmp1(i),y_tmp1(i),'*')
     axis([0 MAX_X 0 MAX_Y])
     pause(0.05)
     
    
  
end

end

  
    xlabel('X (meters)');
    ylabel('Y (meters)');
   

   

[Dev]

I understand that you want to animate your data point in a particular way such that when it disappears on one side, it reappears from the opposite side with the same velocity.

You can change the conditions of the ‘if’ statement to be such that whenever

if x_tmp>MAX_X: 
    x_tmp=x_tmp-MAX_x  %so that it appears from the other side, without changing direction. 

similarly,

if x_tmp<0: 
    x_tmp=MAX_x+x_tmp  

And same for y_tmp as well. Additionally, x_tmp1 is an array of x_tmp so while comparing with 0 or MAX_x, you should compare with x_tmp and not x_tmp1.

I hope this resolves your query.