if(helicopter.u==216)
        {
                if(PAD1R2)
                {
                        gunmove++;
                        if(gunmove>90)
                        {
                                gunmove=90;
                        }
                }
                if(PAD1L2)
                {
                        gunmove--;
                        if(gunmove<2)
                        {
                                gunmove=2;
                        }
                }
                gunangle=gunmove/2;

                for(a=0;a<10;a++)
                {
                        if(groundlines[currentline+a].angle==90)
                        {
                                shoty=groundlines[currentline+a].y;
                                shotx=(((stan[gunangle]*(shoty-helicopter.y))>>12)+160);
                                if(shotx>=(groundlines[currentline+a].x-landbg.scrollx) && shotx<=(groundlines[currentline+a].x1-landbg.scrollx))
                                {
                                        break;
                                }
                        }
                        else
                        {
                                shotx=(groundlines[currentline+a].x-landbg.scrollx);
                                shoty=((((shotx-160)<<12)/stan[gunangle])+helicopter.y);
                                if(shoty>=groundlines[currentline+a].y1 && shoty<=groundlines[currentline+a].y)
                                {
                                        break;
                                }
                        }
                }
        }
        if(helicopter.u==0)
        {
                if(PAD1R2)
                {
                        gunmove--;
                        if(gunmove<2)
                        {
                                gunmove=2;        
                        }
                }
                if(PAD1L2)
                {
                        gunmove++;
                        if(gunmove>90)
                        {
                                gunmove=90;
                        }
                }
                gunangle=gunmove/2;

                for(a=0;a<10;a++)
                {
                        if(groundlines[currentline-a].angle==90)
                        {
                                shoty=groundlines[currentline-a].y;
                                shotx=(160-((stan[gunangle]*(groundlines[currentline-a].y-helicopter.y))>>12));
                                if(shotx>=(groundlines[currentline-a].x-landbg.scrollx) && shotx<=(groundlines[currentline-a].x1-landbg.scrollx))
                                {
                                        break;
                                }

                        }
                        else
                        {
                                shotx=(groundlines[currentline-a].x-landbg.scrollx);
                                shoty=((((160-(groundlines[currentline-a].x-landbg.scrollx))<<12)/stan[gunangle])+helicopter.y);
                                if(shoty>=groundlines[currentline-a].y1 && shoty<=groundlines[currentline-a].y)
                                {
                                        break;
                                }

                        }
                }
        }