/*	camera.cc		(c) Richard Thrippleton	Licensing terms are in the 'LICENSE' file	If that file is not included with this source then permission is not given to use this source in any way whatsoever.*/#include <stdio.h>#include <string.h>#include "calc.h"#include "graphic.h"#include "interface.h"#include "protocol.h"#include "presence.h"#include "constants.h"#include "sound.h"#include "error.h"#include "camera.h"#define x2screen(rx) (long)cx+(rx-pov.x)/vzm#define y2screen(ry) (long)cy+(ry-pov.y)/vzmvoid camera::init(){	src=NULL;	on=false;	for(int i=0;i<64;i++)	{		strs[i].loc.x=-1;		strs[i].loc.y=-1;		strs[i].dep=1;	}	vzm=1;}void camera::turnon(){	on=true;}void camera::turnoff(){	on=false;}void camera::bind(presence* src){	if(camera::src!=src)	{		camera::src=src;		rzm=presence::srng;		vzm=1;		update();	}}void camera::unbind(){	src=NULL;}void camera::render(){	if(!on)		return;	graphic::clip(&interface::viewb);	renderstars();	rendermainview();	if(src)	{		graphic::clip(&interface::radarb);		renderradar();	}}void camera::update(){	if(src)		pov=src->loc;	//Handle camera shaking	if(shak)	{		shak--;		pov.x+=calc::rnd(shak*2)-shak;		pov.y+=calc::rnd(shak*2)-shak;	}	//Update covered universe area	cov.x1=pov.x-rzm;	cov.x2=pov.x+rzm;	cov.y1=pov.y-rzm;	cov.y2=pov.y+rzm;}void camera::noise(sound* snd,presence* src){	vect ssrc; //Sound source vector	double dis; //Rough distance from PoV	ssrc.xx=src->loc.x-pov.x;	ssrc.yy=src->loc.y-pov.y;	if(ssrc.xx<0)		ssrc.xx=-ssrc.xx;	if(ssrc.yy<0)		ssrc.yy=-ssrc.yy;	dis=ssrc.xx+ssrc.yy;	if(dis<600)	{		snd->play(1);		return;	}	if(dis<6400)	{		snd->play(3);		return;	}	if(dis<12800)	{		snd->play(6);		return;	}	}void camera::shake(int mag){	if(mag>20)		mag=20;	shak=mag;}void camera::radarzoom(int dir){	if(dir==+1)		if(rzm>0)			rzm=(rzm*2)/3;	if(dir==-1)		if(rzm>0)			rzm=(rzm*3)/2;	if(rzm>presence::lrng)		rzm=presence::lrng;	if(rzm<200)		rzm=200;}void camera::viewzoom(){	vzm++;	if(vzm>3)		vzm=1;	for(int i=0;i<64;i++)	{		strs[i].loc.x=-1;		strs[i].loc.y=-1;		strs[i].dep=1;	}}box camera::cov;void camera::rendermainview(){	char txt[33]; //For rendering distance on the pointer	presence* tprs; //Pointer to objects to draw	int cx,cy; //Centering screen position	long sx,sy; //Screen co-ordinates	pol pptr;	vect vptr; //Pointer to target	graphic* ptr; //Pointer graphic		cx=interface::viewb.x+(interface::viewb.w/2);	cy=interface::viewb.y+(interface::viewb.h/2);	for(int i=PT_PLANET;i<=PT_FRAG;i++)	{		for(int j=0;j<presence::ISIZE;j++)		{			tprs=presence::get(j);			if(tprs && tprs->typ==i)			{				sx=(long)x2screen(tprs->loc.x);				sy=(long)y2screen(tprs->loc.y);				if(sx>interface::viewb.x-100 && sx<interface::viewb.x+interface::viewb.w+100 && sy>interface::viewb.y-100 && sy<interface::viewb.y+interface::viewb.h+100)					tprs->drawat(sx,sy,vzm);									}		}	}	if(presence::trg)	{		vptr.xx=presence::trg->loc.x-pov.x;		vptr.yy=presence::trg->loc.y-pov.y;		pptr=vptr.topol();		if(pptr.rad>(interface::viewb.w/5)*vzm)		{			sprintf(txt,"%ld",(long)pptr.rad/100);			pptr.rad=interface::viewb.w/2-50;			vptr=pptr.tovect();			vptr.xx+=interface::viewb.x+interface::viewb.w/2;			vptr.yy+=interface::viewb.y+interface::viewb.h/2;			ptr=graphic::get(graphic::NAV);			if(ptr)				ptr->draw(vptr.xx,vptr.yy,(((int)pptr.ang+5)/10)%36,1,0,false);			graphic::string(txt,vptr.xx,vptr.yy+4,false);		}	}}void camera::renderstars(){	int cx,cy; //Centering screen position	int astx,asty; //For holding star position on screen	graphic* warp; //Warp star sprite		warp=NULL;	cx=interface::viewb.x+(interface::viewb.w/2);	cy=interface::viewb.y+(interface::viewb.h/2);	//If we appear to be travelling at warp speed, get the appropriate graphic	if(presence::vel.rad>99)		warp=graphic::get(graphic::WARP);	//Iterate through the background stars	for(int i=0;i<64;i++)	{		//At impulse, some stars will be too 'deep' from warp speed and shouldn't be		if(!warp && strs[i].dep>10)			strs[i].dep=1;		//Calculate the actual screen position		astx=(short)(strs[i].loc.x+(cx-pov.x)/(vzm*strs[i].dep));		asty=(short)(strs[i].loc.y+(cy-pov.y)/(vzm*strs[i].dep));		//If a star is outside of view, make another		if(astx<interface::viewb.x || astx>interface::viewb.x+interface::viewb.w || asty<interface::viewb.y || asty>interface::viewb.y+interface::viewb.h)		{			astx=interface::viewb.x+calc::rnd(interface::viewb.w);			asty=interface::viewb.y+calc::rnd(interface::viewb.h);			if(warp)				strs[i].dep=calc::rnd(140)+60;			else				strs[i].dep=calc::rnd(10)+1;			//Calculate the 'real' location from generated screen position			strs[i].loc.x=astx-(interface::viewb.x+interface::viewb.w/2-pov.x)/(vzm*strs[i].dep);			strs[i].loc.y=asty-(interface::viewb.y+interface::viewb.h/2-pov.y)/(vzm*strs[i].dep);		}		//Draw the star		if(warp)		{			warp->draw(astx,asty,((presence::vel.ang+5)/10)%36,1,0,false);		}		else		{			if(strs[i].dep>5)				graphic::pix(astx,asty,graphic::GREY);			else				graphic::pix(astx,asty,graphic::WHITE);		}	}}void camera::renderradar(){	long sx,sy; //Screen co-ordinates	presence* tprs; //Pointer to objects to draw	char txt[33]; //For rendering co-ordinates on radar	int col; //Color to use on radar	sbox tbox; //Target drawing box	ipol pdir;	ivect vdir; //Direction of travel	flck=!flck;	if((cov.x2-cov.x1)<(presence::srng*4))	{		for(long x=(long)cov.x1/2000,l=(long)cov.x2/2000;x<=l;x++)		{			tbox.x=(int)((((x*2000)-pov.x)*(interface::radarb.w/2))/(cov.x2-pov.x)+interface::radarb.x+interface::radarb.w/2);			tbox.y=interface::radarb.y+interface::radarb.h-2;			tbox.w=1;			tbox.h=3;			graphic::box(&tbox,graphic::GREY);		}		for(long y=(long)cov.y1/2000,l=(long)cov.y2/2000;y<=l;y++)		{			tbox.y=(int)((((y*2000)-pov.y)*(interface::radarb.h/2))/(cov.y2-pov.y)+interface::radarb.y+interface::radarb.h/2);			tbox.x=interface::radarb.x+interface::radarb.w-2;			tbox.w=3;			tbox.h=1;			graphic::box(&tbox,graphic::GREY);		}	}	if(cov.x2-pov.x>presence::srng)	{		tbox.x=(-presence::srng)/((cov.x2-cov.x1)/(long)interface::radarb.w)+interface::radarb.x+interface::radarb.w/2;		tbox.y=(-presence::srng)/((cov.y2-cov.y1)/(long)interface::radarb.h)+interface::radarb.y+interface::radarb.h/2;		tbox.w=(presence::srng)/((cov.x2-cov.x1)/(long)interface::radarb.w)+interface::radarb.x+interface::radarb.w/2;		tbox.h=(presence::srng)/((cov.y2-cov.y1)/(long)interface::radarb.h)+interface::radarb.y+interface::radarb.h/2;		graphic::line(tbox.x,tbox.y,tbox.w,tbox.y,graphic::LIGHTBLUE);		graphic::line(tbox.w,tbox.h,tbox.w,tbox.y,graphic::LIGHTBLUE);		graphic::line(tbox.w,tbox.h,tbox.x,tbox.h,graphic::LIGHTBLUE);		graphic::line(tbox.x,tbox.h,tbox.x,tbox.y,graphic::LIGHTBLUE);	}	for(int i=0;i<presence::ISIZE;i++)	{		tprs=presence::get(i);		if(tprs)		{			sx=(tprs->loc.x-pov.x)/((cov.x2-cov.x1)/(long)interface::radarb.w)+interface::radarb.x+interface::radarb.w/2;			sy=(tprs->loc.y-pov.y)/((cov.y2-cov.y1)/(long)interface::radarb.h)+interface::radarb.y+interface::radarb.h/2;			if(tprs->loc.x>cov.x1 && tprs->loc.x<cov.x2 && tprs->loc.y>cov.y1 && tprs->loc.y<cov.y2)			{				if(tprs==presence::me)				{					if(flck)						col=graphic::RED;					else						col=graphic::BLUE;				}				else				{					switch(tprs->typ)					{						case PT_SHIP:						if(tprs->enem)							col=graphic::RED;						else							col=graphic::WHITE;						break;						case PT_PLANET:						col=graphic::GREEN;						break;						case PT_FRAG:						col=graphic::BLUE;						break;					}				}				if(tprs->typ==PT_SHIP)				{					pdir=tprs->mov.topol();					if(pdir.rad!=0)					{						vdir.xx=(tprs->mov.xx*7)/pdir.rad;						vdir.yy=(tprs->mov.yy*7)/pdir.rad;						graphic::line(sx,sy,sx+vdir.xx,sy+vdir.yy,graphic::BLUE);					}				}				if(tprs==presence::trg || tprs==presence::hl)				{					tbox.x=(int)sx-1;					tbox.y=(int)sy-1;					tbox.w=3;					tbox.h=3;					if(tprs==presence::hl)					{						if(flck)							graphic::box(&tbox,col);					}					else						graphic::box(&tbox,col);				}				else					graphic::pix(sx,sy,col);			}		}	}	if(presence::trg)	{		graphic::string(presence::trg->nam,interface::radarb.x+1,interface::radarb.y+interface::radarb.h-13,false);		graphic::string(presence::trg->anno,interface::radarb.x+1,interface::radarb.y+interface::radarb.h-6,false);	}	sprintf(txt,"%ld , %ld",(long)pov.x/100,(long)pov.y/100);	graphic::string(txt,interface::radarb.x,interface::radarb.y,false);	calc::getspeed(presence::vel.rad,txt);	graphic::string(txt,interface::radarb.x+interface::radarb.w-6*strlen(txt)-2,interface::radarb.y,false);}bool camera::on;presence* camera::src;icord camera::pov;int camera::vzm;long camera::rzm;star camera::strs[64];int camera::shak;bool camera::flck;