android - LibGdx Setting Velocity -

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how can set linear velocity in x direction without effecting motion of y direction body in libgdx box2d. applied impulse body make jump want move towards right or left tried applying following method:

setlinearvelocity(vector2)

but stopping vertical motion. thanks

just retrieve current velocity via getter, manipulate , set new one. 

vector2 velocity = body.getlinearvelocity().cpy(); velocity.set(500, velocity.y); body.setlinearvelocity(velocity);

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