Hi guys!
I was read this article on this site
http://www.gamedev.n...e-physics-r2714

And I wondered, what if upgrade it for experiment?
i downloaded it and decided to add friction.

But I did not understand how to do it correctly. We can replace the speed of this [color=#ff0000]-k*N+OldVelocity[color=#ff0000];
[color=#000000]where N as I understood the normalized velocity (well, more multiplied by -1 is not?)

Well, add a small fix that would not work, that the infinite is force the body begins to move in the opposite direction
[color=#ff0000]VelNew = max(-k*N+OldVelocity, 0.0f)

how to modify this method (if not this one?) to get the friction?
[source lang="cpp"]void Physics::UpdateVerlet() { //????????? ????????? ??????
for( int I = 0; I < VertexCount; I++ ) {
Vertex& V = *Vertices[ I ];

Vec2 OldPosition = V.Position;
V.Position += V.Position-V.OldPosition + V.Acceleration*Timestep*Timestep;
V.OldPosition = OldPosition;

}
}[/source]

Hi,
Here you can add the damping, but friction is related to the contact between two bodies.
So you could add :
[source lang="java"]V.Position += (V.Position-V.OldPosition) * damping + V.Acceleration*Timestep*Timestep;[/source]

The friction will change the acceleration "V.Acceleration" in function of the contact normal.

Hope it can help...

Hi,
Here you can add the damping, but friction is related to the contact between two bodies.
So you could add :
[source lang="java"]V.Position += (V.Position-V.OldPosition) * damping + V.Acceleration*Timestep*Timestep;[/source]

The friction will change the acceleration "V.Acceleration" in function of the contact normal.

Hope it can help...

Thanks, but it's not work true