#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>

#include <math.h>

#include <SDL.h>
#include <SDL_keysym.h>
#include <SDL_rotozoom.h>
#include <SDL_ttf.h>
#include <SDL_framerate.h>
#include <SDL_mixer.h>

#include "shared.h"
#include "rc.h"

FPSmanager manager;
SDL_Surface *temps;

SDL_Surface *screen;
TTF_Font *font[MAXLETTERHEIGHT];

Mix_Music *curmusic = NULL; // pointer to currently playing music

char tempm[BUFLEN];

tiletype_t fakeblock;

/* the order in which fruit will appear */
int fruittypes[] = {
	P_CHEESE,
	P_ICECREAM,
	P_CHIPS,
	P_BURGER,
	-1
};


/* the order in which powerups will appear */
int poweruptypes[] = {
	P_SPEED,
	P_NUMNETS,
	P_BIGNET,
	P_NUMNETS,
	-1
};

int curfruittype = 0;
int curpoweruptype = 0;

int gtime = 0;
int fpsticks = 0;
int fpsstart = 0;

int curworld = 1;
int curlevelnum;
level_t *curlevel;
int levelcomplete = B_FALSE;
int levelcompletetime = -1;

sprite_t *sprite = NULL; /* main sprite list */
sprite_t *player;
sprite_t *lastsprite;

text_t *text, *lasttext;

SDL_Color red = {255, 0, 0, 0};
SDL_Color black = {0, 0, 0, 0};
SDL_Color white = {255, 255, 255, 0};
SDL_Color green = {0, 255, 0, 0};
SDL_Color yellow = {255, 255, 0, 0};

int vidargs = 0;

int timer = 0;
int toggletimer = 0;

int main (int argc, char **argv) {
	Uint8 *keys;
	sprite_t *s,*nextsprite;
	char filename[BUFLEN];
	int i;
	int *animtile;

	curlevelnum = 1;
	musicplaying  = B_FALSE;

	/* handle arguments */
	if (argc >= 2) {
		for (i = 1; i < argc; i++) {
			if (!strcmp(argv[i], "-fs")) {
				printf("Fullscreen mode enabled.\n");
				vidargs |= SDL_FULLSCREEN;
			} else if (!strcmp(argv[i], "-l")) {
				if (++i >= argc) {
					printf("Missing level number.\n");
					usage();
					exit(1);
				} 
				curlevelnum = atoi(argv[i]);
				printf("Skipping to level %d.\n",curlevelnum);
			} else {
				usage();
				exit(1);
			}
		}
	}

	if(SDL_Init(SDL_INIT_VIDEO|SDL_INIT_NOPARACHUTE)==-1) {
		printf("SDL_Init: %s\n", SDL_GetError());
		exit(1);
	}

	atexit(cleanup);

	#ifdef OPENGL
	SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
	SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8);
	SDL_GL_SetAttribute (SDL_GL_DOUBLEBUFFER, 1);
	screen = SDL_SetVideoMode(640,480,16,SDL_OPENGLBLIT|vidargs);
	#else
	screen = SDL_SetVideoMode(640,480,16,SDL_SWSURFACE|SDL_DOUBLEBUF|vidargs);
	#endif

	if (loadimagesets()) {
		return 1;
	}

	fakeblock.id = T_LAND;
	strcpy(fakeblock.name,"Fake");
	for (i = 0; i < TILEW; i++) {
		fakeblock.lowness[i] = 0;
	}
	fakeblock.solid = S_SOLID;
	fakeblock.img[0] = IMG_Load("land.bmp");
	fakeblock.numframes = 1;
	fakeblock.next = NULL;
	fakeblock.prev = NULL;
	
	
	/* load fonts */
	TTF_Init();
	sprintf(filename, "verdana.ttf");
	for (i = 1; i < MAXLETTERHEIGHT; i++) {
		font[i] = TTF_OpenFont(filename,i);
		if (!font[i]) {
			printf("Error opening font: %s\n", TTF_GetError());
			return 1;
		}
	}

	/* calculate fps delay */
	SDL_initFramerate(&manager);
	SDL_setFramerate(&manager, WANTFPS);



	/* init sound */
	if (initsound()) {
		printf("sound error.\n");
		return 1;
	}

	playmusic(normalmusic);
	if (loadlevel(curworld,curlevelnum)) {
		return 1;
	}


	drawlevel();
	flip();

	timer = 0;

	player->invuln = INVULNTIME;
	player->score = 0;

	while (1) {
		/*
		removetext();
		for (s = sprite ; s ; s = s->next) {
			removesprite(s);
		}
		removenetting(player);
		*/
		removeall();

		/* check for death & update movement status*/
		for (s = sprite ; s ; s = nextsprite) {
			s->moved = B_FALSE;
			nextsprite = s->next;
			if (s->dead == D_FINAL) {
				if (s == player) {
					/* TODO: lose a life */
					/* if we have lives left, go back to start position */
					setdefaults(s);
					s->x = (curlevel->p1x * TILEW) + (TILEW/2);
					s->y = (curlevel->p1y * TILEH) + (TILEH/2);
					s->invuln = INVULNTIME;
				} else {
					killsprite(s);
				}
			}

		}

		/* check for end of level */
		if (levelcomplete == 1) {
			addtext(318,242,32,"Level Complete!",&black,LEVELDELAY);
			addtext(320,240,32,"Level Complete!",&yellow,LEVELDELAY);
			levelcomplete = 2;
			playfx(FX_WINLEVEL);
		} else if (levelcomplete == 2) {
			int mcount = 0;
			sprite_t *s2;

			/* when all monsters have become fruits */
			for (s2 = sprite->next ; s2 ; s2 = s2->next) {
				if (ismonster(s2->id)) {
					if (s2->id != P_CLOUD) {
						mcount++;
						break;
					}
				}
			}
			if (mcount == 0) {
				levelcompletetime = gtime;
				levelcomplete = 3;
			}
		}
	
		

		/* check for keys */
		SDL_PumpEvents();
		keys = SDL_GetKeyState(NULL);



		if (keys[SDLK_q]) {
			gtime = curlevel->hurryuptime -1;
		}
		if (keys[SDLK_RETURN]) {
			if (toggletimer == 0) {
				SDL_WM_ToggleFullScreen(screen);
				toggletimer = 50;
			}
		} 
		if (keys[SDLK_ESCAPE]) {
			return 1;
		} 

		if ((!player->dead)  && (!player->teleporting)) {
			if (keys[SDLK_RIGHT]) {
				if (canmove(player)) {
					movex(player, getspeed(player));
				}
				if (canturn(player)) {
					player->dir = D_RIGHT;
				}
			} 
			if (keys[SDLK_LEFT]) {
				if (canmove(player)) {
					movex(player, -getspeed(player));
				}
				if (canturn(player)) {
					player->dir = D_LEFT;
				}
			} 
			if (keys[SDLK_UP]) {
				if (isonladder(player) || isladderabove(player)) {
					player->y -= getspeed(player);
					player->jumping = 0;
					player->falling = 0;
					player->climbing = B_TRUE;
				}
			} 
			if (keys[SDLK_DOWN]) {
				if (isonladder(player)) {
					player->y += getspeed(player);
					player->jumping = 0;
					player->falling = 0;
					player->climbing = B_TRUE;
				}
			} 
			if (keys[SDLK_x]) {
				if (isinwater(player)) {
					player->jumping = B_FALSE;
					player->falling = B_FALSE;
					if (!isroofabove(player)) {
						player->y -= (getspeed(player)*3);
					}
				} else {
					if (!player->jumping) {
						if (!player->falling) {
							if (isonground(player) || isonladder(player)) {
								/* dropping through a bridge */
								if (keys[SDLK_DOWN])  {
									if (isonbridge(player) && !player->falling) {
										/* drop down */
										player->dropping = B_TRUE;
										player->dropx = player->x / TILEW;
										player->dropy = player->y / TILEH;
									}
								} else {
									int whichway;
									player->climbing = B_FALSE;
									if (keys[SDLK_RIGHT]) {
										whichway = 1;
									} else if (keys[SDLK_LEFT]) {
										whichway = -1;
									} else {
										whichway = 0;
									}
									playfx(FX_JUMP);
									jump(player, whichway);
								}
							}
						}
					}
				}
			}
			if (keys[SDLK_z]) {
				if ((!player->netting) && (!player->slamming)) {
					if (keys[SDLK_DOWN]) {
						/* slam */
						if ((!player->slamming) && (isonground(player))) {
							playfx(FX_SLAM);
							player->slamming = B_TRUE;
							player->slamangle = 0;
							player->netxstart = player->x - (player->img->w/2)*player->dir;
							player->netystart = player->y;
						}
					} else {
						if (player->netcaught < player->netmax) {
							/* shoot net */
							playfx(FX_SHOOT);
							player->netting = 1;
							if (player->netbig) {
								player->netspeed = NETSPEED+3;
							} else {
								player->netspeed = NETSPEED;
							}
							player->netlen = 0;
							player->netdir = player->dir;
						}
					}
				}
			}
		}


		// for each animated tile on the level...
		for (animtile = curlevel->animtiles; animtile && *animtile != -1; animtile++) {
			int offset,numframes;
			tiletype_t *tt;

			offset = *animtile;

			tt = gettile(curlevel->map[offset]);

			numframes = tt->numframes;

			// is it time to change frames?
			if ((timer % tt->animspeed) == 0) {
				// change its frame
				curlevel->tileframe[offset]++;
				if (curlevel->tileframe[offset] >= numframes) {
					curlevel->tileframe[offset] = 0;
				}
				// redraw it
				drawtile(temps, offset%LEVELW,offset/LEVELW);
			}

		}

		// move sprites
		for (s = sprite; s ; s = s->next) {
			movesprite(s);
		}
		movetext();

		
		/* gravity */
		for (s = sprite ; s ; s = s->next) {
			dogravity(s);
		}

		/* tile effects */
		for (s = sprite ; s ; s = s->next) {
			dotileeffects(s);
		}

		/* check collisions */
		//for (s = sprite ; s ; s = s->next) {
		//	checkcollide(s);
		//}
		checkcollide(player);


		drawscore();

		drawnetting(player);

		/* draw player */
		for (s = sprite ; s ; s = s->next) {
			drawsprite(s);
		}
		/* draw text */
		drawtext();


		flip();
		if (++timer == 100) timer = 0;
		if (toggletimer > 0) toggletimer--;

		tick();
 	}

	return 0;

}

void tick(void) {
	sprite_t *s;

	SDL_framerateDelay(&manager);

	fpsticks = SDL_GetTicks();
	if (fpsstart == 0) {
		fpsstart = fpsticks;
	} else {
		/* once per second */
		if (fpsticks - fpsstart >= 1000) {
			gtime++;


			/* */
			if (gtime == curlevel->hurryuptime) {
				if (!levelcomplete) {
					for  (s = sprite; s; s = s->next) {
						if ((s != player) && (!isfruit(s->id))) {
							s->angry = B_TRUE;
						}
					}
					addtext(320,240,TEXTSIZE_HURRY, "Hurry up!", &yellow,HURRYDELAY);

					stopmusic();
					Mix_PlayChannel(CH_HURRYUP, sfx[FX_HURRYUP], 0);
				}
			} else if (gtime == curlevel->hurryuptime + 10) {
				if (!levelcomplete) {
					addsprite(P_CLOUD, 320,240,"cloud", B_FALSE);
					addtext(320,240,TEXTSIZE_HURRY, "Too slow!", &red,HURRYDELAY);
					playfx(FX_TOOSLOW);
				}
			} 


			/* 5 seconds after level completion */
			if (levelcomplete == 3) {
				if (gtime - levelcompletetime >= 5) {
					if (!player->dead) {
						nextlevel();
					}
				}
			}
			fpsstart = fpsticks;
		}
	}
}

void nextlevel(void) {
	/* go to next level */
	curlevelnum++;
	if (!musicplaying || (curmusic == fastmusic)) {
		playmusic(normalmusic);
	}
	loadlevel(curworld,curlevelnum);
	drawlevel();
	levelcomplete = B_FALSE;
	levelcompletetime = -1;

	/* reset player stats */
	player->netting = B_FALSE;
	player->slamming = B_FALSE;
	player->jumping = B_FALSE;
}

void jump(sprite_t *s, int dir) {
	if (s->jumping) return;
	if (s->jumptimer) return;

	if (isonground(s)) {
		if (ismonster(s->id)) {
			s->jumpdir = dir;
			if (s->jumpdir != 0) {
				s->dir = s->jumpdir;
			}
			s->jumptimer = 60;
		} else {
			s->jumpdir = dir;
			if (s->jumpdir != 0) {
				s->dir = s->jumpdir;
			}
			s->jumping = 1;
			s->jumpspeed = 5;
		}
	}
}

void die(sprite_t *s) {
	int mcount = 0;
	sprite_t *s2;
	/* clouds can't die like this */
	if (s->id == P_CLOUD) return;

	/* if this is the player, hurryup time counter resets */
	// We already do this in the cloud movement routine, but
	// this handles cases where the cloud hasn't appeared yet.
	if (s == player) {
		gtime = 0;
		if (curmusic == fastmusic) {
			playmusic(normalmusic);
		}
		// reset powerup types
		curpoweruptype = 0;
	}

	if (s == player) {
		/* play sound */
		playfx(FX_DIE);
	}

	/* release anything we've caught */
	for (s2 = sprite->next ; s2 ; s2 = s2->next) {	
		if (s2->caughtby == s) {
			s2->caughtby = NULL;
			s2->angry = B_TRUE;
		}
	}
	/* set death attribute */
	s->dead = D_INITIAL;
	s->netting = 0;
	s->slamming = 0;

	/* any monsters left? */
	if (!levelcomplete) {
		for (s2 = sprite->next ; s2 ; s2 = s2->next) {
			if (ismonster(s2->id) && !s2->dead) {
				if (s2->id != P_CLOUD) {
					mcount++;
					break;
				}
			}
		}

		if (mcount == 0) {
			levelcomplete = 1;
		}
	}
}

void cleanup(void) {
	int i;
	Mix_HaltMusic();
	Mix_CloseAudio();
	for (i = 1; i < MAXLETTERHEIGHT; i++) {
		TTF_CloseFont(font[i]);
	}
	TTF_Quit();
	SDL_Quit();
}

void checkcollide(sprite_t *s) {
	sprite_t *s2;
	int collide;
	int xdiff,ydiff;

	for (s2 = sprite ; s2 ; s2 = s2->next) {
		collide = B_TRUE;
		if (s2 == s) collide = B_FALSE;
			else if (s->dead) collide = B_FALSE;
			else if (s2->dead) collide = B_FALSE;
			else if (s->caughtby) collide = B_FALSE;
			else if (s2->caughtby) collide = B_FALSE;

		if (collide) {
			/* check for colission with our net */
			if ((s->netting) && (!s2->caughtby)) {
				if (s->netcaught < s->netmax) {
					if (ismonster(s2->id) && s2->id != P_CLOUD) {
						xdiff = (s->x + s->netlen*s->netdir) - s2->x;
						if (xdiff < 0) xdiff = -xdiff;
						ydiff = s->netystart - (s2->y - s2->img->h/2);
						if (ydiff < 0) ydiff = -ydiff;

						if ((xdiff <= s2->img->w/2) && (ydiff <= s2->img->h)) {
							s2->caughtby = s;
							s2->jumping = 0;
							s2->falling = 0;
							s2->caughtstate = C_NETTING;
							s->netcaught++;
						}
					}
				}
			} else {
				/* check for collision with us */
				xdiff = s->x - s2->x;
				if (xdiff < 0) xdiff = -xdiff;
				ydiff = (s->y-(s->img->h/2)) - (s2->y-(s2->img->h/2));
				if (ydiff < 0) ydiff = -ydiff;
				
				if ((xdiff <= s->img->w/2 + s2->img->w/2) && 
				    (ydiff <= s->img->h/2 + s2->img->h/2)) {
					/* COLLISION! */
					if (isfruit(s2->id) && (s2->teleporting == 0)) {
						if (s == player) {
							int gotscore = s2->score;

							/* kill the fruit */
							s2->dead = D_FINAL;
							/* give points to the player */
							player->score = player->score + gotscore;
							/* handle fruit effects */
							if (!dofruiteffect(s2)) {
								playfx(FX_FRUIT);
								sprintf(tempm, "%d", gotscore);
								addtext(s2->x,s2->y - s2->img->h/2, TEXTSIZE_POINTS, tempm, &white,POINTSDELAY);
							}
						}
					}
					if (ismonster(s2->id) || isbullet(s2->id)) {
						if ((s == player) && (!s->invuln)) {
							die(s);
						}
					}
				}
			}
		}
	}
}


// do death bouncing effect
void bouncesprite(sprite_t *s) {
	s->x += s->xs;
	s->y += s->ys;

	if (s->x >= (640-TILEW-(s->img->w/2))) {
		// move back onto screen
		while (s->x >= (640-TILEW-(s->img->w/2))) {
			s->x--; 
		}
		if (s->xs > 0) s->xs = -s->xs;  // reverse direction
		s->bounces++;
	} else if (s->x <= TILEW+s->img->w/2) {
		// move back onto screen
		while (s->x <= TILEW+s->img->w/2) {
			s->x++;
		}
		if (s->xs < 0) s->xs = -s->xs;  // reverse direction
		s->bounces++;
	}

	if (s->y >= (480-(s->img->h/2))) {
		while (s->y >= (480-(s->img->h/2))) {
			s->y--;
		}
		if (s->ys > 0) s->ys = -s->ys;  // reverse direction
		s->bounces++;
	} else if (s->y <= s->img->h) {
		while (s->y <= s->img->h) {
			s->y++;
		}
		if (s->ys < 0) s->ys = -s->ys;  // reverse direction
		s->bounces++;
	}
}


void movesprite(sprite_t *s) {
	int rv;
	tiletype_t *tt;

	/* timer */
	if (s->doomcount) {
		s->doomcount--;
		if (s->doomcount == 0) {
			s->dead = D_FINAL;
		}
	}

	/* avoid edges of screen */
	if (s->y < s->img->h) {
		if (!s->flies) {
			s->y = s->img->h;
		}
	}
	if (s->x > (640 - s->img->w/2)) {
		s->x = 640 - s->img->w/2;
	}
	if (s->x < (s->img->w/2)) {
		s->x = s->img->w/2;
	}

	if (s->invuln) {
		s->invuln--;
	}


	if (s->caughtby) {
		if (s->caughtby->slamming) {

			/* */

			s->x = s->caughtby->netxstart;
			s->y = s->caughtby->netystart;
		} else {
			/* stay at position of net */
			s->y = s->caughtby->y;
			if (s->caughtstate == C_NETTING) {
				s->x = s->caughtby->x + (s->caughtby->netlen*s->caughtby->netdir);
			} else {
				s->x = s->caughtby->x + (s->caughtby->img->w/2) * -(s->caughtby->dir);
			}
		}
		return;
	} else if (s->dead == D_INITIAL) {      /* just set to dead */

		// 0 through 5
		s->xs = 0.5 + ((rand() % 50) / 10); // 0.5 through 5.5
		if (rand() % 2) { // 50% change of going left
			s->xs = s->xs * -1;
		}
		s->ys = -1 * (4 + ((rand() % 30) / 10)); // -4 through -7

		s->dead = D_BOUNCING;
		s->bounces = 0;
		if (s == player) {
			s->jumpspeed = 8;
			s->jumping = 1;
		}
		return;
	} else if (s->dead == D_BOUNCING) {      /* dying */
		if (s == player) {
			/* shoot up in the air, then fall */
			s->y -= s->jumpspeed;

			s->jumping++;
			if (s->jumping % 5 == 0) {
				s->jumpspeed--;
			}

			/* if we've fallen off the bottom... */
			if (s->y >= 480) {
				/* pause before respawning */
				s->jumpspeed = 0; /* this is now a timer */
				s->dead = D_LASTBOUNCE;
			}
		} else {
			/* bounch around the screen 3 times */
			bouncesprite(s);
			if ((s->bounces >= 2) && (s->ys > 0)) {
				// make sure we're not on the ground 
				if (!isonground(s)) {
					int tx,ty;
					tiletype_t *tt;
					tt = gettileat(s->x,s->y,&tx,&ty);

					printf("finished bouncing, sprite is at: %d, %d (tileid %d)\n",tx,ty,tt->id);
					s->dead = D_LASTBOUNCE;
				}
			}
		}
		return;
	} else if (s->dead == D_LASTBOUNCE) {    /* final fall */
		if (s == player) {
			/* just delay... */
			s->jumpspeed++;
			if (s->jumpspeed == 50) {
				/* really die */
				s->dead = D_FINAL;
			}
		} else { /* bounce around, stop when we hit the ground */
			bouncesprite(s);
			/*   OLD BOUNCE CODE
			if (s->x >= (640-TILEW- s->img->w/2)) {
				if (s->xs > 0) {
					s->xs = -s->xs;
					s->bounces++;
				}
			} else if (s->x <= TILEW + s->img->w/2) {
				if (s->xs < 0) {
					s->xs = -s->xs;
					s->bounces++;
				}
			}

			if (s->y >= (480-(s->img->h/2))) {
				if (s->ys > 0) {
					s->ys = -s->ys;
					s->bounces++;
				}
			} else if (s->y <= s->img->h) {
				if (s->ys < 0) {
					s->ys = -s->ys;
					s->bounces++;
				}
			}
			*/


			if ((s->ys > 0) && (s->y >= TILEH)) {
				if (isonground(s)) {
					int x,y,ty;
					s->dead = D_FINAL;
					/* change into a fruit */
					x = s->x;
					gettileat(s->x,s->y-1,NULL,&ty);
					//y = ty*TILEH + TILEH - 2;
					y = ty*TILEH - 2;

					/* make sure it's within the screen */
					if (x > (640-TILEW)) x = 640-TILEW;
					if (x < (TILEW)) x = TILEW;
				
					//addsprite(s->willbecome, x, y, "Fruit", B_FALSE);
					puffin(s->willbecome, x, y, 0);
					//ss = addsprite(P_PUFF, x, y, "Fruit", B_FALSE);
					//ss->timer3 = s->willbecome;

				}
			}
		}
		return;
	} else if (s->teleporting > 0) {
		SDL_Surface *ts;
		if (timer % 2 == 0) {
			/* shrink */
			if (s->teleporting == TP_SHRINKING) {
				ts = rotozoomSurfaceXY(s->img,0, 0.9 , 0.9 ,0);
				s->img = ts;
			} else {
				ts = rotozoomSurfaceXY(s->img,0, 0.9 , 0.9 ,0);
				SDL_FreeSurface(s->img);
				s->img = ts;
			}

			if ((s->img->w <= 2) || (s->img->h <= 2)) {
				/* go to tele dest */
				int x,y;
				/* find destination */
				for (y = 0; y < LEVELH; y++) {
					for (x = 0; x < LEVELW; x++) {
						tt = gettile(curlevel->map[y*LEVELW+x]);
						if (tt->id == T_TELEPORTDEST) {
							/* teleport there */
							s->x = (x * TILEW) + (TILEW/2);
							s->y = (y * TILEH) + TILEH-2;
						}
					}
				}
				s->teleporting = -1;	
			} else s->teleporting++;	
		}
	} else if (s->teleporting < 0) {
		double size;
		if (timer % 2 == 0) {
			/* grow */
			size = (double)-s->teleporting / 10;

			SDL_FreeSurface(s->img);
			if (size >= 1) {
				s->teleporting =  0;
				s->img = imageset[s->id].img[F_WALK1];
			} else {
				s->img = rotozoomSurfaceXY(imageset[s->id].img[F_WALK1],0,size,size,0);
				s->teleporting--;
			}
		}
	} else if (s->jumping) {
		movex(s, s->jumpdir*getspeed(s));
		return;
	}

	if (!iseffect(s->id)) {
		if (isonground(s)) {
			if ((!s->falling) && (!s->jumping)) {
				if (!s->climbing && !s->dropping) {
					adjustheight(s);
				}
			}
		}
	}

	/* sprite is about to jump */
	if (s->jumptimer) {
		s->jumptimer--;
		if (s->jumptimer == 0) {
			s->jumping = 1;
			s->jumpspeed = 5;
			if (s->jumpdir != 0) s->dir = s->jumpdir;
			return;
		} else if (s->jumptimer % 20 == 0) {
			s->dir = -s->dir;
		}
	} else if (s->id == P_PUFF) {
		/* SUMMARY:
			timer1:
				indicates current frame.  if < 0, don't draw.
				if >= PUFFFRAMES, use last frame.

				when timer1 gets to PUFFAPPEAR, create a gem
				of type s->

			timer2:
				loops from 0 to 9.
				at intervals of PUFFSPEED, increment timer1.

		*/

		// still delaying
		if (s->timer1 < 0) {
			// increment "frame"
			s->timer1++;
		} else {
			// increment frame at a slower pace
			if (++s->timer2 >= 10) {
				s->timer2 = 0;
			}
			if (timer % PUFFSPEED == 0) {
				s->timer1++;
				// finished animating
				if (s->timer1 == PUFFAPPEAR) {
					// create a gem/fruit/etc
					addsprite(s->timer3, s->x,s->y,"gem", B_FALSE);
				} else if (s->timer1 >= PUFFFRAMES) {
					s->dead = D_FINAL;
				}
			}
		}

	} else if (s->id == P_RAT) {
		if (!s->falling) {
			int move = B_FALSE;
			int xdiff, absxdiff;


			/* distance to player */
			xdiff = player->x - s->x;
			if (xdiff < 0) absxdiff = -xdiff;
				else absxdiff = xdiff;

			tt = gettileat(s->x + s->dir+getspeed(s),s->y,NULL,NULL);
			/* if there's a hole in front of us */
			if (tt->solid == S_NOTSOLID) {
				if ((player->y > s->y) && (s->angry)) {
					/* if player is below, fall off */
					if (xdiff <= (TILEW*8)) {
						move = B_TRUE;
					}
				} else if (player->y == s->y) {
					if (s->angry) {
						/* if player is at same level and close, jump */
						if ((s->dir == D_RIGHT) && (xdiff > 0) && (xdiff <= (TILEW*7))) {
							jump(s,D_RIGHT);
						} else if ((s->dir == D_LEFT) && (xdiff < 0) && (xdiff >= -(TILEW*7))) {
							jump(s,D_LEFT);
						}
					}
				}
			} else {
				move = B_TRUE;
			}
	
			/* either move or turn around */
			if (move) {
				rv = movex(s, s->dir*getspeed(s));
				if (rv) {
					/* if we couldn't move (hit a wall), turn */
					s->dir = -s->dir;
				}
			} else {
				s->dir = -s->dir;
			}

			if (s->angry) {
				if ((player->dead == 0) && (!s->jumping) && (!s->jumptimer)) {
					/* if player is above us, jump */
					if (player->y < s->y) {
						if ((xdiff >= (TILEW*2)) && (xdiff <= (TILEW*3))) {
							/* jump right */
							jump(s, 1);
						} else if ((xdiff <= -(TILEW*2)) && (xdiff >= -(TILEW*3))) {
							/* jump left */
							jump(s, -1);
						} else if (s->y - player->y <= (TILEH*6)) {
							 if ((xdiff >= 0) && (xdiff < (TILEW*2))) {
								/* jump up */
								jump(s, 0);
							} else if ((xdiff <= 0) && (xdiff > -(TILEW*2))) {
								/* jump up */
								jump(s, 0);
							}
						} else {
							/* jump whichever way we're facing */
							/*
							s->jumpdir = s->dir;
							s->jumping = 1;
							s->jumpspeed = 5;
							*/
						}
					}
				}
			}
		}
	} else if (s->id == P_COKE) {

		if (!s->falling) {
			int move = B_FALSE;
			int xdiff, absxdiff;


			/* distance to player */
			xdiff = player->x - s->x;
			if (xdiff < 0) absxdiff = -xdiff;
				else absxdiff = xdiff;

			tt = gettileat(s->x + s->dir+getspeed(s),s->y,NULL,NULL);
			/* if there's a hole in front of us */
			if (tt->solid == S_NOTSOLID) {
				if (player->y > s->y ) {
					/* if player is below and nearby, fall off */
					if (xdiff <= (TILEW*16)) {
						move = B_TRUE;
					}
				} else if (player->y == s->y) {
					/* if player is at same level and close, jump */
					if ((s->dir == D_RIGHT) && (xdiff > 0) && (xdiff <= (TILEW*7))) {
						jump(s,D_RIGHT);
					} else if ((s->dir == D_LEFT) && (xdiff < 0) && (xdiff >= -(TILEW*7))) {
						jump(s,D_LEFT);
					}
				}
			} else {
				move = B_TRUE;
			}
	
			/* either move or turn around */
			if (move) {
				rv = movex(s, s->dir*getspeed(s));
				if (rv) {
					/* if we couldn't move (hit a wall), turn */
					s->dir = -s->dir;
				}
			} else {
				s->dir = -s->dir;
			}



			/* moves like an angry rat all the time */
			if ((player->dead == 0) && (!s->jumping) && (!s->jumptimer)) {
				/* if player is above us...*/
				if (player->y < s->y) {
					if ((xdiff >= (TILEW*2)) && (xdiff <= (TILEW*3))) { // if 2-3 tiles right
						/* jump right */
						jump(s, D_RIGHT);
					} else if ((xdiff <= -(TILEW*2)) && (xdiff >= -(TILEW*3))) { // if 2-3 tiles left
						/* jump left */
						jump(s, D_LEFT);
					} else if (s->y - player->y <= (TILEH*6)) { // player less than 6 tiles above
						 if ((xdiff >= 0) && (xdiff < (TILEW*4))) { // ... and within 4 tiles
							/* jump up */
							jump(s, 0);
						} else if ((xdiff <= 0) && (xdiff > -(TILEW*4))) { // ... and within 4 tiles
							/* jump up */
							jump(s, 0);
						}
					}
				}
			}
		}
	} else if (s->id == P_SNAKE) {
		/* timer1 loopsfrom 0 - 19

		  if timer2 is 0, we can shoot.  if it is 1, we can't.
			
		*/

		// inc shooting timer
		if (s->timer1) {
			s->timer1--;
			if (s->timer1 == 0) {
printf("can shoot again\n");
			}
		}
		if (!s->falling) {
			int move = B_FALSE;
			int xdiff, absxdiff,ydiff;


			/* distance to player */
			xdiff = player->x - s->x;
			if (xdiff < 0) absxdiff = -xdiff;
				else absxdiff = xdiff;

			tt = gettileat(s->x + s->dir+getspeed(s),s->y,NULL,NULL);
			/* if there's a hole in front of us */
			if (tt->solid == S_NOTSOLID) {
				if ((player->y > s->y) && (s->angry)) {
					/* if player is below, fall off */
					if (xdiff <= (TILEW*8)) {
						move = B_TRUE;
					}
				} else if (player->y == s->y) {
					if (s->angry) {
						/* if player is at same level and close, jump */
						if ((s->dir == D_RIGHT) && (xdiff > 0) && (xdiff <= (TILEW*7))) {
							jump(s,D_RIGHT);
						} else if ((s->dir == D_LEFT) && (xdiff < 0) && (xdiff >= -(TILEW*7))) {
							jump(s,D_LEFT);
						}
					}
				}
			} else {
				move = B_TRUE;
			}

			/* shoot */
			ydiff = player->y - s->y;
			if (ydiff < 0) ydiff =-ydiff;

			if (ydiff <= (TILEH*4)) {
				sprite_t *ss;
				int shoot = B_FALSE;
				if (s->bullet == NULL) { // if we don't already have a bullet
					// if we are facing the player
					if ( (player->x < s->x) && (s->dir == D_LEFT) ) {
						shoot = B_TRUE;
					} else if ( (player->x > s->x) && (s->dir == D_RIGHT) ) {
						shoot = B_TRUE;
					}
				}
				if (shoot) {
					// if our shooting timer is okay
					if (s->timer1 == 0) {
						ss = addsprite(P_SPIT,s->x,s->y - s->img->h/2,"spit", B_FALSE);
						ss->ys = 0;
						ss->xs = s->dir * (getspeed(s)*2);
						ss->dir = s->dir;
						ss->owner = s;

						s->bullet = ss;

						// start timer for shooting again
						s->timer1 = 200;
					}
				}
			}
	
			/* either move or turn around */
			if (move) {
				rv = movex(s, s->dir*getspeed(s));
				if (rv) {
					/* if we couldn't move (hit a wall), turn */
					s->dir = -s->dir;
				}
			} else {
				s->dir = -s->dir;
			}


			if (s->angry) {
				if ((player->dead == 0) && (!s->jumping) && (!s->jumptimer)) {
					/* if player is above us, jump */
					if (player->y < s->y) {
						if ((xdiff >= (TILEW*2)) && (xdiff <= (TILEW*3))) {
							/* jump right */
							jump(s, 1);
						} else if ((xdiff <= -(TILEW*2)) && (xdiff >= -(TILEW*3))) {
							/* jump left */
							jump(s, -1);
						} else if (s->y - player->y <= (TILEH*6)) {
							 if ((xdiff >= 0) && (xdiff < (TILEW*2))) {
								/* jump up */
								jump(s, 0);
							} else if ((xdiff <= 0) && (xdiff > -(TILEW*2))) {
								/* jump up */
								jump(s, 0);
							}
						} else {
							/* jump whichever way we're facing */
							/*
							s->jumpdir = s->dir;
							s->jumping = 1;
							s->jumpspeed = 5;
							*/
						}
					}
				}
			}
		}

	} else if (s->id == P_BEE) {
		double absxs,absys;
		if ((s->xs == -99) || (s->ys == -99)) {
			s->xs = getspeed(s);
			s->ys = getspeed(s);
		}

		if (s->xs > 0) absxs = 1;
			else absxs = -1;

		if (s->ys > 0) absys = 1;
			else absys = -1;

		/* this will fix the speed if ANGRY is set */
		s->xs = absxs*getspeed(s);
		s->ys = absys*getspeed(s);


		/* can we move? */
		tt = gettileat(s->x + absxs*((s->img->w/2)+8), s->y-(s->img->h/2),NULL,NULL);
		if ((tt->solid) || (tt->spikes )) {
			/* turn */
			s->xs = -s->xs;
		}
		tt = gettileat(s->x, s->y-(s->img->h/2) + absys*((s->img->h/2)+8),NULL,NULL);
		if ((tt->solid) || (tt->spikes)) {
			/* turn */
			s->ys = -s->ys;
		}

		/* move */
		s->x += s->xs;
		s->y += s->ys;
		s->dir = absxs;
		s->moved = B_TRUE;
	} else if (s->id == P_SPIDER) {
		/* if on ground, go up */
		if (isonground(s) && !s->flies) {
			s->flies = B_TRUE;
			s->falling = B_FALSE;
			s->ys = -getspeed(s);
		} else if (s->falling) {
			/* if we are about to hit spikes, go back up */
			tt = gettileat(s->x,s->y + 8,NULL,NULL);
			if (tt->spikes) {
				/* go back up */
				s->flies = B_TRUE;
				s->falling = B_FALSE;
				s->ys = -getspeed(s);
			}
		} else {
			if (s->ys != -99) {
				/* if roof above us */
				tt = gettileat(s->x,s->y - s->img->h,NULL,NULL);
				if (tt->solid) {
					int tiley;
					/* start walking again */
					tiley = (int) (s->y / TILEH);
					s->y = tiley*TILEH;
					s->ys = -99;
					s->flies = B_TRUE;
				} else {
					s->y += s->ys;
					s->flies = B_TRUE;
				}
			} else {
				int move = B_FALSE;
				int xdiff;
				/* walk back and forwards */

				/* drop if player is close */
				xdiff = player->x - s->x;
				if (xdiff < 0) xdiff =-xdiff;
				if ((player->y > s->y) && (xdiff <= (TILEW*2))) {
					s->flies = B_FALSE;
					s->falling = B_TRUE;
					s->fallspeed = 8;
				} else {

					s->flies = B_TRUE;

					/* if there's a hole in front of us */
					tt = gettileat(s->x + s->dir*((s->img->w/2)+2),s->y - s->img->h - 2,NULL,NULL);
					if (tt->solid == S_NOTSOLID) {
						move = B_FALSE;
					} else {
						move = B_TRUE;
					}
			
					/* either move or turn around */
					if (move) {
						rv = movex(s, s->dir*getspeed(s));
						if (rv) {
							/* if we couldn't move (hit a wall), turn */
							s->dir = -s->dir;
						}
					} else {
						s->dir = -s->dir;
					}
				}
			}
		}
	} else if (s->id == P_SPIT) {
		if (movex(s, s->xs)) {
			s->dead = D_FINAL;
		}
	} else if (s->id == P_CLOUD) {
		if ((player->dead) || (levelcomplete)) {
			if ((s->img->h <= 3) || (s->img->w <= 3)) {
				s->dead = D_FINAL;
				/* reset hurryup timer */
				gtime = 0;
			} else {
				SDL_Surface *ts;
				/* get smaller */
				ts = rotozoomSurfaceXY(s->img,0, 0.9 , 0.9 ,0);
				SDL_FreeSurface(s->img);
				s->img = ts;
				s->y--;
			}
		} else {
			if ((s->xs == -99) || (s->ys == -99)) {
				s->ys = 0.5;
				s->xs = 1;
			}

			s->x += s->xs;
			s->y += s->ys;

			if (s->x >= (640 - s->img->w/2 - 5)) {
				s->xs = -s->xs;
				s->x = 640 - s->img->w/2 - 6;
			}
			if (s->x <= (s->img->w/2 + 5)) {
				s->xs = -s->xs;
				s->x = s->img->w/2 + 6;
			}
			if (s->y >= (480 - s->img->h/2 - 5)) {
				s->ys = -s->ys;
				s->y = 480 - s->img->h/2 - 6;
			}
			if (s->y <= (s->img->h/2 + 5)) {
				s->ys = -s->ys;
				s->y = s->img->h/2 + 6;
			}


			if (timer % 50 == 0) {
				int w,h;
				SDL_Surface *ts;
				/* get bigger */
				w = s->img->w;
				h = s->img->h;
				ts = rotozoomSurfaceXY(s->img,0, 1.1 , 1.1 ,0);
				SDL_FreeSurface(s->img);
				s->img = ts;

				s->y += 2;
			}
		}
	}

}

void dotileeffects(sprite_t *s) {
	tiletype_t *tt;
	int finished = B_FALSE;
	int state = 0;

	if (s->jumping || s->dead || s->caughtby) {
		return;
	}

	/* check where we are */
	tt = gettileat(s->x,s->y-2,NULL,NULL);
	if ((tt->id == T_TELEPORT) || (tt->id == T_TELEPORT2)) {
		if (s->id == P_PLAYER || ismonster(s->id)) {
			if (s->id != P_CLOUD) {
				s->teleporting = 1;
			}
		}
	}
		
	/* check under us */
	tt = gettileat(s->x,s->y+3,NULL,NULL);
	while (!finished) {
		if (tt->id == T_RIGHT) {
			if (!ismonster(s->id) && !isfruit(s->id)) {
				movex(s, 1.5);
			}
			finished = B_TRUE;
		} else if (tt->id == T_LEFT) {
			if (!ismonster(s->id) && !isfruit(s->id)) {
				movex(s, -1.5);
			}
			finished = B_TRUE;
		} else if (tt->spikes) {
			if (!isfruit(s->id)) {
				if (!s->invuln) {
					if (s->id != P_CLOUD) {
						die(s);
					}
				}
			}
			finished = B_TRUE;
		} else {
			if (state == 0) {
				/* check tile to our right */
				tt = gettileat(s->x + s->img->w/2,s->y+3,NULL,NULL);
				state = 1;
			} else if (state == 1) {
				/* check tile to our left */
				tt = gettileat(s->x - s->img->w/2,s->y+3,NULL,NULL);
				state = 2;
			} else {
				finished = B_TRUE;
			}
		}
	}
}


void drawlevel(void) {
	int x,y;
	SDL_Rect area;
	int speed = 16;

	if (temps) {
		SDL_FreeSurface(temps);
		temps = NULL;
	}
	temps = SDL_CreateRGBSurface(SDL_SWSURFACE,
		640, 480, 
		screen->format->BitsPerPixel, screen->format->Rmask,
		screen->format->Gmask,screen->format->Bmask,
		screen->format->Amask);

	for (x = 0; x < LEVELW; x++) {
		for (y = 0; y < LEVELH; y++) {
			drawtile(temps,x,y);
		}
	}


	for (x = 0; x < 640; x += speed) {
		area.x = 0;
		area.y = 0;
		if (x > 639) {
			area.w = 639;
		} else area.w = x;
		area.h = 480;
		SDL_BlitSurface(temps, &area, screen, &area);
		SDL_UpdateRect(screen, area.x, area.y, area.w, area.h);
	}
}


double getspeed(sprite_t *s ) {
	int id = s->id;
	double speed = 1;

	if (id == P_PLAYER) {
		speed =  s->speed;
	} else if (id == P_RAT) {
		if (s->angry) speed =  1.5;
			else speed =  1;
	} else if (id == P_SNAKE) {
		if (s->angry) speed =  1.5;
			else speed =  1;
	} else if (id == P_BEE) {
		if (s->angry) speed =  2;
			else speed =  1;
	} else if (id == P_SPIDER) {
		if (s->angry) speed =  1.5;
			else speed =  2;
	} else if (id == P_CHEESE) {
		speed =  0;
	}

	if (isinwater(s)) speed /= 2;

	return speed;
}


int addtext(int x, int y, int size, char *string, SDL_Color *c, int delay) {
	text_t *t;

	if (text == NULL) {
		text = malloc(sizeof(text_t));
		t = text;
		t->prev = NULL;
	} else {
		t = lasttext;
		t->next = malloc(sizeof(text_t));
		t->next->prev = t;

		t = t->next;
	}

	t->bg = SDL_CreateRGBSurface(SDL_SWSURFACE,
		300, 110, 
		screen->format->BitsPerPixel, screen->format->Rmask,
		screen->format->Gmask,screen->format->Bmask,
		screen->format->Amask);

	t->c = c;
	t->x = x;
	t->y = y;
	t->maxsize = size;
	t->size = 3;
	strcpy(t->txt, string);
	t->state = 0;
	t->delay = delay;

	t->img = TTF_RenderText_Solid(font[t->size], t->txt, *t->c);


	t->next = NULL;
	lasttext = t;

	return B_FALSE;
}


/* copy background buffer (ie. tiles) to screen, erasing sprites */
void removeall(void) {
	SDL_BlitSurface(temps, NULL, screen, NULL);
}

void removetext(void) {
	SDL_Rect sarea;
	text_t *t;

	for (t = text ; t ; t = t->next) {
		sarea.x = 0;
		sarea.y = 0;
		sarea.w = t->bgarea.w;
		sarea.h = t->bgarea.h;

		SDL_BlitSurface(t->bg, &sarea, screen, &t->bgarea);
	}
}

void movetext(void) {
	text_t *t,*nextt;
	for (t = text ; t ; t = nextt) {
		nextt = t->next;
		if (t->state == 0) {
			t->size += TEXTSPEED;
			if (t->size >= t->maxsize) {
				t->state = 1;
			}
		} else if (t->state == t->delay) {
			t->size -= TEXTSPEED;
			if (t->size <= 3) {
				killtext(t);
			}
			
		} else {
			t->state++;
		}
	}
}

void drawscore(void) {
	SDL_Surface *score;
	SDL_Rect area;

	sprintf(tempm, "%d",player->score);

	/* shadow */
	score = TTF_RenderText_Solid(font[14], tempm, black);
	area.x = 18;
	area.y = 7;
	area.w = 0;
	area.h = 0;
	SDL_BlitSurface(score, NULL, screen, &area);
	SDL_FreeSurface(score);
	/* score */
	score = TTF_RenderText_Solid(font[14], tempm, green);
	area.x = 20;
	area.y = 5;
	area.w = 0;
	area.h = 0;
	SDL_BlitSurface(score, NULL, screen, &area);
	SDL_FreeSurface(score);
}

void drawtext(void) {
	text_t *t;
	SDL_Rect area;

	for (t = text ; t ; t = t->next) {

		/* create text */
		if (t->img) {
			SDL_FreeSurface(t->img);
			t->img = NULL;
		}
		t->img = TTF_RenderText_Solid(font[t->size], t->txt, *t->c);

		/* get bg */
		t->bgarea.x = t->x - t->img->w/2;
		t->bgarea.y = t->y - t->img->h/2;
		t->bgarea.w = t->img->w;
		t->bgarea.h = t->img->h;
		SDL_BlitSurface(screen, &t->bgarea, t->bg, NULL);
		
		/* draw text */
		area.x = t->x - t->img->w/2;
		area.y = t->y - t->img->h/2;
		area.w = t->img->w;
		area.h = t->img->h;
		SDL_BlitSurface(t->img,NULL, screen, &area);
	}

	
}

void killtext(text_t *t) {
	text_t *nextone, *lastone;


	if (t->bg) {
		SDL_FreeSurface(t->bg);
		t->bg = NULL;
	}
	if (t->img) {
		SDL_FreeSurface(t->img);
		t->img = NULL;
	}

	nextone = t->next;
	if (nextone != NULL) {
		nextone->prev = t->prev;
	} else { /*last text */
		lasttext = t->prev;
	}

	if (t->prev == NULL) {
		/* first text */
		nextone = text->next;
		free(text);
		text = nextone;
	} else {
		lastone = t->prev;
		free (lastone->next );
		lastone->next = nextone;
	}
}


void drawnetting(sprite_t *s) {
	int sx;
	SDL_Rect area;
	
	if (s->netting) {
		int y,yy;
		int dis;
		int netsleft;
	
		sx = s->x;
		s->nety = s->y - (s->img->h/2) + 2;

		s->netxstart = s->x;
		s->netystart = s->nety - 3;

		if (s->netdir == 1) {
			area.x = s->netxstart + TILEW/2;
		} else {
			area.x = s->netxstart - TILEW/2 - s->netlen;
		}
		//area.y = s->netystart;
		area.y = s->y - s->img->h-2 + 2;
		area.w = s->netlen;
		area.h = s->img->h+2;
		SDL_BlitSurface(screen, &area,s->netbg, NULL);

		netsleft = s->netmax - s->netcaught;
		if (netsleft < 1) netsleft = 1;
		dis = (int)s->img->h / (int)(netsleft+1) + 1;
		

		for (y = dis; y < s->img->h; y += dis) {
			yy = s->y - s->img->h;
			yy += y;
			drawline16(screen,sx,s->nety,s->x + s->netdir*s->netlen,yy,white);
		}

		//drawline16(screen,sx,s->nety,s->x + s->netdir*s->netlen,s->nety-3,white);
		//drawline16(screen,sx,s->nety,s->x + s->netdir*s->netlen,s->nety,white);
		//drawline16(screen,sx,s->nety,s->x + s->netdir*s->netlen,s->nety+3,white);
	} else if (s->slamming) {
		double dist;
		int x,y;
		dist = (s->slamangle * (180/M_PI))/2;
	
		s->netxstart = s->x + cos(s->slamangle-(180*(M_PI/180)))*dist*s->dir;
		s->netystart = s->y + sin(s->slamangle-(180*(M_PI/180)))*dist;

		/* middle line */
		drawline16(screen,s->x,s->y - s->img->h/2,
				s->netxstart,s->netystart,white);
		/* left line */
		x = s->x + cos(s->slamangle-(5*(M_PI/180))-(180*(M_PI/180)))*dist*s->dir;
		y = s->y + sin(s->slamangle-(5*(M_PI/180))-(180*(M_PI/180)))*dist;
		drawline16(screen,s->x,s->y - s->img->h/2,x, y, white);
		/* right line */
		x = s->x + cos(s->slamangle+(5*(M_PI/180))-(180*(M_PI/180)))*dist*s->dir;
		y = s->y + sin(s->slamangle+(5*(M_PI/180))-(180*(M_PI/180)))*dist;
		drawline16(screen,s->x,s->y - s->img->h/2,x, y, white);
	}

}

void removenetting(sprite_t *s) {
	SDL_Rect area,sarea;

	if (s->netting) {
		sarea.x = 0;
		sarea.y = 0;
		sarea.w = s->netlen;
		sarea.h = s->img->h+2;
	
		if (s->netdir == 1) {
			area.x = s->netxstart + TILEW/2;
		} else {
			area.x = s->netxstart - TILEW/2 - s->netlen;
		}
		//area.y = s->netystart;
		area.y = s->y - s->img->h-2;
		area.w = s->netlen;
		area.h = s->img->h+2;

		if (s->netbg != NULL) {
			SDL_BlitSurface(s->netbg, &sarea, screen, &area);
		}
	}
}


void removesprite(sprite_t *s) {
	int startx,starty,endx,endy;
	int x,y;


	/* find topleft-most tile */
	gettileat(s->x - s->img->w, s->y - s->img->h,&startx,&starty);
	/* find bottomright-most tile */
	gettileat(s->x + s->img->w, s->y + s->img->h,&endx,&endy);

	if (s->slamming) {
		if (s->dir == D_LEFT) {
			startx -= 5;
			endx += 1;
		} else {
			startx -= 1;
			endx += 5;
		}
		starty -= 2;
		endy += 1;
	}

	/* draw the tiles */
	for (y = starty; y <= endy; y++) {
		for (x = startx; x <= endx; x++) {
			drawtile(screen,x,y);
		}
	}
}

int isonbridge(sprite_t *s) {
	tiletype_t *tthere;
	tthere = gettileat(s->x,s->y, NULL,NULL);
	if (tthere->id == T_BRIDGE) {
		return B_TRUE;
	}

	return B_FALSE;
}


int isonladder(sprite_t *s) {
	tiletype_t *tthere;
	tthere = gettileat(s->x,s->y, NULL,NULL);
	if ((tthere->id == T_LADDER) || (tthere->id == T_LADDERTOP)) {
		return B_TRUE;
	}

	return B_FALSE;
}

int isladderabove(sprite_t *s) {
	tiletype_t *tthere;
	tthere = gettileat(s->x,s->y-TILEH, NULL,NULL);
	if (tthere->id == T_LADDER) {
		return B_TRUE;
	}

	return B_FALSE;
}

int isinwater(sprite_t *s) {
	tiletype_t *tt;
	tt = gettileat(s->x, s->y - s->img->h/2, NULL, NULL);
	if (tt->water) {
		return B_TRUE;
	}

	return B_FALSE;
}

int isroofabove(sprite_t *s) {
	tiletype_t *tt;

	/* get tile above sprite's head */
	tt =  gettileat(s->x, s->y - s->img->h,NULL,NULL);
	if (tt->solid) return B_TRUE;
	tt =  gettileat(s->x + s->img->w/2, s->y - s->img->h,NULL,NULL);
	if (tt->solid) return B_TRUE;
	tt =  gettileat(s->x - s->img->w/2, s->y - s->img->h,NULL,NULL);
	if (tt->solid) return B_TRUE;

	return B_FALSE;
}
/* is there a roof n tiles above us. If howfar is 1, this is the same
   as the regular isroofabove() */
int isroofnabove(sprite_t *s, int howfar) {
	tiletype_t *tt;
	int ypos;

	ypos = s->y - s->img->h - TILEH*(howfar-1);

	/* get tile above sprite's head */
	tt =  gettileat(s->x, ypos,NULL,NULL);
	if (tt->solid) return B_TRUE;
	tt =  gettileat(s->x + (s->img->w/2 - 2), ypos,NULL,NULL);
	if (tt->solid) return B_TRUE;
	tt =  gettileat(s->x - (s->img->w/2 - 2), ypos,NULL,NULL);
	if (tt->solid) return B_TRUE;

	return B_FALSE;
}

int isonground(sprite_t *s) {
	/* get tile below sprite's feet */
	if (isongroundpoint(s, s->x, s->y)) {
		return B_TRUE;
	}
	if ((s->dead) || (!s->falling && !s->dropping))  {
		if (isongroundpoint(s, s->x + s->img->w/2, s->y)) {
			return B_TRUE;
		}
		if (isongroundpoint(s, s->x - s->img->w/2, s->y)) {
			return B_TRUE;
		}
	}

	return B_FALSE;
}

int isongroundpoint(sprite_t *s, int x,int y) {
	tiletype_t *tt;
	int tilex,tiley;
	int xoff;
	int groundy;

	tt = gettileat(x,y, &tilex, &tiley);


	// slope etc doesn't matter if you're dead
	if (s->dead && tt->solid) {
		return B_TRUE;
	}

	// when dropping, the tile you dropped from doesn't count 
	// as "ground".
	if (s->dropping && (tilex == s->dropx) && (tiley == s->dropy)) {
		return B_FALSE;
	}

	/* get offset */
	xoff = x - (tilex*TILEW);

	/* if it's not solid... */
	if (tt->solid == 0) {
		return B_FALSE;
	} else {
		/* check height of tile at that position */
		groundy = tiley*TILEH + tt->lowness[xoff];

		/* above ground level */
		if (y < groundy) {
			return B_FALSE;
		} else if (y > groundy + 3) {
			/* below ground level */
			if (s->jumping)  {
				return B_FALSE;
			}
		} else if (s->falling) {
			tiletype_t *abovetile;
			/* falling, on a tile, but with tiles above you */
			// ie. you've jumped up through a single tile (can't
			// jump through two or more tiles
			abovetile = gettileat(x,y-TILEH, NULL, NULL);
			if (abovetile->solid) {
				return B_FALSE;
			}
	//	} else if (s->dropping) {
	//		tiletype_t *abovetile;
			/* if the tile we're on is solid but not the one 
			   above, then we've "dropped" and are still 
			   travelling through the tile we dropped from. */
	//		abovetile = gettileat(x,y-TILEH, NULL, NULL);
	//		if (!abovetile->solid) {
	//			return B_FALSE;
	//		}
		}

	}

	return B_TRUE;
}

void dogravity(sprite_t *s) {
	sprite_t *s2;

	if (s->dead) return;
	if (s->flies) return;
	if (iseffect(s->id)) return;

	if (isbullet(s->id)) return;

	if (isonladder(s) && !s->falling && !s->jumping) {
		s->falling = B_FALSE;
		return;
	}

	// handle jumps 
	if (s->jumping) {
		s->falling = B_FALSE;
		s->y -= s->jumpspeed;
		s->jumping++;
		if (s->jumping % 5 == 0) {
			if (s->jumpspeed > 0) s->jumpspeed--;
				else {
					s->jumping = 0;
					s->falling = B_TRUE;
					s->fallspeed = 0;
				}
		}

		/* have we hit a roof ? */
		/* can jump through one tile, but not two or more */
		if (isroofabove(s) && isroofnabove(s,2)) {
			/* stop jumping */
			s->jumping = 0;
			s->falling = B_TRUE;
			s->fallspeed = 0;
		}
			
	} else {
		if (isonground(s) ) {
			s->dropping = B_FALSE;
			s->falling = B_FALSE;
			s->climbing = B_FALSE;
		} else {
			if (s->falling == B_FALSE) {
				s->fallspeed = 1;
			} 
			s->falling = B_TRUE;
			if (isinwater(s)) {
				s->y += (s->fallspeed/2);
			} else {
				s->y += s->fallspeed;
			}
			if ((timer % 10 == 0) && (s->fallspeed < FALLSPEED)) {
				s->fallspeed++;
			}
		}
	}

	if (s->netting) {
		s->netlen += s->netspeed;
		s->netting++;
		if (s->netting % 2 == 0) {
			if (s->netspeed > -NETSPEED) s->netspeed--;
				else {
					s->netting = 0;
					for (s2 = sprite ; s2 ; s2 = s2->next) {
						if ((s2->caughtby == s) && (s2->caughtstate == C_NETTING)) {
							s2->caughtstate = C_NETTED;
						}
					}
				}
		}
	}

	if (s->slamming) {
		s->slamangle += (10 * (M_PI/180));
		if (s->slamangle >= (180 * (M_PI/180))) {
			/* finished slamming */
			int xdiff,ydiff,xnet = 0,ynet = 0;
			int pointsinc = 250;
			int psize = 6;
			int gotsomething = B_FALSE;

			s->slamming = 0;

			/* reset fruit type counter */
			curfruittype = 0;

			/* kill anything we've caught */
			for (s2 = sprite;  s2 ; s2 = s2->next) {
				/* kill anything we have caught */
				if (s2->caughtby == s) {
					tiletype_t *tt;
					tt = gettileat(s2->x,s2->y+2,NULL,NULL);
					/* if on ground, monster dies */
					if ((tt == NULL) || (tt->solid)) {
						/* will become a fruit when it finishes dying */
						s2->willbecome = fruittypes[curfruittype];
						/* increment fruit type */
						if (fruittypes[++curfruittype] == -1) {
							curfruittype = 0;
						}
						die(s2);
						pointsinc *= 2;
						psize += 10;
						xnet = s2->x;
						ynet = s2->y - s2->img->h/2;

						gotsomething++;
					} else {
						/* otherwise it gets angry */
						s2->angry = B_TRUE;
					}
				}
			}

			/* kill anything we hit */
			for (s2 = sprite;  s2 ; s2 = s2->next) {
				if ((s2->caughtby != s) && (!s2->dead) && (ismonster(s2->id))) {
					xdiff = s2->x - xnet;
					if (xdiff < 0) xdiff =-xdiff;
					ydiff = (s2->y - s2->img->h/2) - ynet;
					if (ydiff < 0) ydiff =-ydiff;

					if ((xdiff <= s2->img->w) && (ydiff <= s2->img->h)) {
						if (s2->id != P_CLOUD) {
							/* dies and becomes a powerup */
							s2->willbecome = poweruptypes[curpoweruptype];
							if (poweruptypes[++curpoweruptype] == -1) {
								curpoweruptype = 0;
							}
							die(s2);
							pointsinc *= 2;
							psize += 10;

							gotsomething++;
						}
					}

				}
			}
			if (gotsomething >= 1) {
				playfx(FX_KILL);
			} 
			if (gotsomething > 1) {
				playfx(FX_MULTIKILL);
			}


			gotsomething = B_FALSE;

			/* release anything we've caught */
			for (s2 = sprite;  s2 ; s2 = s2->next) {
				if (s2->caughtby == s) {
					/* release it */
					s2->caughtby = NULL;
				}
			}
			
			s->netcaught = 0;

			/* show points */
			if (psize >= MAXLETTERHEIGHT) {
				psize = MAXLETTERHEIGHT-1;
			}
			if (pointsinc > 250) {
				sprintf(tempm, "%d",pointsinc);
				addtext(xnet,ynet-TILEH, psize, tempm, &white,POINTSDELAY);
				/*  give points to player */
				s->score += pointsinc;
			}

		}
	}
}


int movex(sprite_t *s,double amt) {
	double newx,newy;
	double curx,cury;
	int tilex,tiley;
	tiletype_t *tt,*tt2;
	int newxoff,newgroundy;
	int newtilex,newtiley;

	double amtdir;

	tt = gettileat(s->x, s->y, &tilex,&tiley);


	if (amt > 0) amtdir = 1;
		else (amtdir = -1);


	curx = s->x;
	cury = s->y;

	/* check for blockage in front of us */
	//newx = s->x + (amtdir*(s->img->w/2));
	newx = s->x + (amtdir*TILEW/2);
	newy = cury-TILEH;
	tt2 = gettileat(newx,newy,&newtilex,&newtiley);
	if (tt2->solid == S_SOLID) {
		return B_TRUE;
	}
	if (tt2->solid == S_SLOPE && (!candoslopes(s->id))) {
		return B_TRUE;
	}

	/* get new position */
	newx = curx + amt;
	newy = cury-2;
	tt2 = gettileat(newx,newy,&newtilex,&newtiley);
	newxoff = newx - (newtilex*TILEW);
	newgroundy = newtiley*TILEH + tt2->lowness[newxoff];

	/* new block is at least partially solid */
	if (tt2->solid == S_SOLID) {
		return B_TRUE;
	} else if ((tt2->solid == S_SLOPE) && candoslopes(s->id)) { 
		/* we can move, but need to adjust our height */
		s->x += amt;
	} else {
		/* new block is empty */
		s->x += amt;
	}

	s->moved = B_TRUE;
	return B_FALSE;
}

void adjustheight(sprite_t *s) {
	tiletype_t *tt;
	int xoff,groundy;
	int tilex,tiley;

	if ((s->flies) || isbullet(s->id)) {
		return;
	}

	tt = gettileat(s->x,s->y-1,&tilex,&tiley);
	if (!tt) return;
	if (tt->solid == S_SLOPE) {
		xoff = s->x - (tilex*TILEW);
		groundy = tiley*TILEH + tt->lowness[xoff];
		s->y = groundy;
	} else if (tt->solid == S_SOLID) {
		while (tt->solid == S_SOLID) {
			s->y--;
			tt = gettileat(s->x,s->y-1,&tilex,&tiley);
		}
	}
}

int dofruiteffect(sprite_t *s) {
	if (s->id == P_SPEED) {
		playfx(FX_POWERUP);
		player->speed = 2;
		addtext(s->x,s->y - s->img->h/2, TEXTSIZE_POINTS, "Speed up!", &white,POINTSDELAY);
		return B_TRUE;
	} else if (s->id == P_NUMNETS) {
		playfx(FX_POWERUP);
		if (player->netmax < 4) {
			player->netmax++;
		}
		sprintf(tempm, "%d nets!",player->netmax);
		addtext(s->x,s->y - s->img->h/2, TEXTSIZE_POINTS, tempm,&white,POINTSDELAY);
		return B_TRUE;
	} else if (s->id == P_BIGNET) {
		playfx(FX_POWERUP);
		player->netbig = B_TRUE;
		sprintf(tempm, "Big net!");
		addtext(s->x,s->y - s->img->h/2, TEXTSIZE_POINTS, tempm,&white,POINTSDELAY);
		return B_TRUE;
	} else if (s->id == P_HELP) {
		playfx(FX_POWERUP);
		addtext(320,240,TEXTSIZE_HELP, s->name, &white,HELPDELAY);
		return B_TRUE;
	} else if (isflower(s->id)) {
		int xx;
		sprite_t *ss;
		tiletype_t *tt;
		int found = B_FALSE;

		/* was this the last fruit of its kind on the level? */
		for (ss = sprite; ss; ss = ss->next) {
			if ((ss != s) && (ss->id == s->id)) {
				found = B_TRUE;
			}
		}
		/* if so, create a left/right stream of flowers */
		if (!found) {
			int howmany = STREAMWID + 1;
			int puffdelay;

			// RIGHT
			puffdelay = 0;
			for (xx = s->x+TILEW; xx < s->x + (TILEW*howmany); xx += TILEW) {
				// if on a wall, exit
				tt = gettileat(xx,s->y-TILEH,NULL,NULL);
				if (tt->solid) {
					break;
				}
				/* create a flower */
				puffin(flowertogem(s->id), xx, s->y, puffdelay);
				//ss = addsprite(P_PUFF, xx,s->y,"puff", B_FALSE);
				//ss->timer1 = -puffdelay;
				//ss->timer3 = flowertogem(s->id);

				puffdelay += 1;
			}
			// LEFT
			puffdelay = 0;
			for (xx = s->x+TILEW; xx > s->x - (TILEW*howmany); xx -= TILEW) {
				// if on a wall, exit
				tt = gettileat(xx,s->y-TILEH,NULL,NULL);
				if (tt->solid) {
					break;
				}
				puffin(flowertogem(s->id), xx, s->y, puffdelay);
				//ss = addsprite(P_PUFF, xx,s->y,"puff", B_FALSE);
				//ss->timer1 = -puffdelay;
				//ss->timer3 = flowertogem(s->id);
				puffdelay += 1;
			}
			playfx(FX_BONUS);
			sprintf(tempm, "BONUS!");
			addtext(s->x,s->y - s->img->h/2, TEXTSIZE_BONUS, tempm,&white,BONUSDELAY);
			return B_TRUE;
		}
	}

	return B_FALSE;
}

int ismonster(int id) {
	if (id == P_RAT) return B_TRUE;
	if (id == P_BEE) return B_TRUE;
	if (id == P_SPIDER) return B_TRUE;
	if (id == P_SNAKE) return B_TRUE;
	if (id == P_CLOUD) return B_TRUE;
	if (id == P_COKE) return B_TRUE;

	return B_FALSE;
}


void usage(void) {
	printf("usage:  rc [-fs] [-l xx]\n");
	printf("   -fs     Start in full-screen mode.\n");
	printf("   -l xx  Skip to level xx.\n");
	printf("\n");
}

// returns B_TRUE if the given player is able to walk/fall left/right 
int canmove(sprite_t *pl) {
	if (!pl->jumping && !pl->slamming ) {
		if (!pl->netting)  {
			if (!isonladder(pl) || pl->falling || isonground(pl)) {
				return B_TRUE;
			}
		} else if (pl->netting && pl->falling) { // netting and falling
			return B_TRUE;
		}
	}
	return B_FALSE;
}

// returns B_TRUE if the given player is able to change which direction they're facing
int canturn(sprite_t *pl) {
	if (!pl->slamming && !pl->netting) {
		return B_TRUE;
	}
	return B_FALSE;
}

int loadfx(int sid , char *filename) {
	char tempname[BUFLEN];

	sprintf(tempname, "sounds/");
	strncat(tempname, filename, BUFLEN);
	sfx[sid] = Mix_LoadWAV(tempname);
	if (!sfx[sid]) {
		printf("error loading %s\n",tempname);
		return B_TRUE;
	}
	return B_FALSE;
}

int initsound(void) {
	int i;

	/* init */
	if (Mix_OpenAudio(44100, AUDIO_S16SYS, 2, 1024) < 0) {
		printf("Error initialising sound: %s.\n",Mix_GetError());
		return B_TRUE;
	}

	Mix_AllocateChannels(CH_LASTCHANNEL);

	loadfx(FX_SHOOT, "shoot.wav");
	loadfx(FX_SLAM, "slam.wav");
	loadfx(FX_KILL, "kill.wav");
	loadfx(FX_MULTIKILL, "multikill.wav");
	loadfx(FX_JUMP, "jump.wav");
	loadfx(FX_FRUIT, "fruit.wav");
	loadfx(FX_POWERUP, "powerup.wav");
	loadfx(FX_DIE, "die.wav");
	loadfx(FX_WINLEVEL, "winlevel.wav");
	loadfx(FX_HURRYUP, "hurryup.wav");
	loadfx(FX_TOOSLOW, "tooslow.wav");
	loadfx(FX_BONUS, "bonus.wav");


	// load sound effects
	for  (i = 0; i < MAXFX; i++) {
		if (!sfx[i]) {	
			return B_TRUE;
		}
	}

	// set up callback
	Mix_ChannelFinished(channeldone);

	// load music
	normalmusic = Mix_LoadMUS("music/main.mod");
	if (!normalmusic) {
		printf("can't load music\n");
		return B_TRUE;
	}

	fastmusic = Mix_LoadMUS("music/mainfast.mod");
	if (!fastmusic) {
		printf("can't load fast music\n");
		return B_TRUE;
	}

	return B_FALSE;
}

void playfx(int num) {
	Mix_PlayChannel(-1, sfx[num], 0);
}

void playmusic(Mix_Music *toplay) {
	/* stop music */
	if (musicplaying) {
		Mix_HaltMusic();
	}

	/* start music */
	//music = toplay;
	Mix_PlayMusic(toplay, -1);
	
	curmusic = toplay;
	musicplaying = B_TRUE;
}

void stopmusic(void) {
	/* stop music */
	if (musicplaying) {
		Mix_HaltMusic();
	}
	musicplaying = B_FALSE;
	curmusic = NULL;
}

// callback for sound effects finishing 
void channeldone(int channel) {
	if (channel == CH_HURRYUP) {
		// start fast music
		playmusic(fastmusic);
	}
}



void puffin(int willbecome, int x, int y, int delay) {
	sprite_t *ss;
	ss = addsprite(P_PUFF, x, y, "puff", B_FALSE);
	ss->timer3 = willbecome;
	ss->timer1 = -delay;
}