v3_muladds( move_vel, sidedir, VG_TIMESTEP_FIXED *-movespeed, move_vel );
if( vg_get_button( "right" ) )
v3_muladds( move_vel, sidedir, VG_TIMESTEP_FIXED * movespeed, move_vel );
v3_muladds( move_vel, sidedir, VG_TIMESTEP_FIXED *-movespeed, move_vel );
if( vg_get_button( "right" ) )
v3_muladds( move_vel, sidedir, VG_TIMESTEP_FIXED * movespeed, move_vel );