Solved Momentum

Hey.
I am making a plugin that involves momentum.
How might I, when a player causes a playerteleportevent, take their velocity before they teleported, and set their velocity to that after they teleport.
Similar concept to portals. Speedy thing comes in, speedy thing goes out. Also, this is essentially a portal gun plugin. (Attempting to make the best one out there) I have another problem that may occur, when I jump into the block on the ground I designate, and It teleports me, I want my momentum to go upward. BTW, this plugin isn't just designed to be a port of portal, but a port of the Source Engine! If anyone want's to help me, I need all the help I can get!
Thanks,
- Blue

 

BlueMustache
You have look at the rotation of the 2th portal, and change the velocity based on that.

 

I know that.
Do you have example code for a momentum script?

 

BlueMustache
Before you teleport them, save the player.getVelocity(). Then once they teleport, use player.setVelocity(VelocityYouSaved); If they are changing directions while teleporting, insert some logic to check that, and if anything is the opposite, multiply that cord by -1

 

Thanks, I thought that was it. Just checking.
Although, you can't save a velocity into a hashmap can you?

 

Code:java

new HashMap<String, Vector> velocities = new HashMap<String, Vector>();
 
velocities.put(player.getName(), player.getVelocity()):
 
velocities.get(player.getName());

 

I had a simple script I made to make sponges bouncy(only to find out mojang is using the same method for the slime blocks...). The code is simple, just take the player's Y velocity and times it by -1

Code:java

Player p = e.getPlayer();
Vector v = p.getVelocity();
 
v.setY(v.getY * -1);
p.setVelocity(v);

 

Thanks guys! Problem solved.