Some gravity particles

[User137]

Remember there were originally 2 multiplications in optimized version, so now it becomes 1 and that looks like working well

d:=G_FORCE/(d*d);

I still want to give boundaries to the world though, and see what it'd be like. Kind of like how subsection would settle, and i expect a little plasma-like effect. Some days later perhaps.

edit: Decided to code them straight away. (No plasma, but something more boring )

            // Rectangular collision
            {if v.x<-10 then movement.x:=abs(movement.x)
            else if v.x>10 then movement.x:=-abs(movement.x);
            if v.y<-10 then movement.y:=abs(movement.y)
            else if v.y>10 then movement.y:=-abs(movement.y); }
            // Circular collision
            if v.x*v.x+v.y*v.y>100 then
              movement:=reflect(movement, vector2f(-v.x*0.1,-v.y*0.1));