var myszx, myszy;
myszx=display_mouse_get_x()-display_get_width()/2;
myszy=display_mouse_get_y()-display_get_height()/2;
direction+=myszx/5;
zdir+=myszy/5;
display_mouse_set(display_get_width()/2,display_get_height()/2);
xt=x+cos(direction*pi/180);
yt=y-sin(direction*pi/180);
zt=z+zdir/10
d3d_set_projection(x,y,z, xt,yt,zt, 0,0,1);