X-Git-Url: https://jasonwoof.com/gitweb/?p=vor.git;a=blobdiff_plain;f=main.c;h=359e59f29a151aceb0312243d6f25cdbf9cb4e61;hp=5341e289c380fef401b7b141549083d20ab2060a;hb=f8b249157652f109467064877561955910f98fc1;hpb=7e7335ed9dcf2b1484543fec9bfa196bdc658fd5

diff --git a/main.c b/main.c
index 5341e28..359e59f 100644
--- a/main.c
+++ b/main.c
@@ -25,10 +25,13 @@
 
 #include "config.h"
 #include "file.h"
+#include "globals.h"
+#include "rocks.h"
 #include "score.h"
 #include "shape.h"
 #include "sound.h"
 
+#include <argp.h>
 #include <math.h>
 #include <SDL/SDL.h>
 #include <SDL/SDL_image.h>
@@ -36,48 +39,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
 
 #include "SFont.h"
 
-#define CONDERROR(a) if((a)) {initerror = strdup(SDL_GetError());return 1;}
-#define NULLERROR(a) CONDERROR((a) == NULL)
-
-// ************************************* STRUCTS
-struct rock_struct {
-	float x,y,dx,dy;
-	int active;
-	int dead;  // has been blown out of the way
-	           // to make room for a new ship appearing.
-	SDL_Surface *image;
-	struct shape *shape;
-	int type_number;
-}; 
-struct bangdots {
-	// Bang dots have the same colour as shield dots.
-	// Bang dots get darker as they age.
-	// Some are coloured the same as the ex-ship.
-	float x,y,dx,dy;
-	Uint16 c; // when zero, use heatcolor[bangdotlife]
-	float life;	// When reduced to 0, set active = 0
-	int active;
-	float decay;// Amount by which to reduce life each time dot is drawn
-};
-struct enginedots {
-	// Engine dots stream out the back of the ship, getting darker as they go.
-	int active;
-	float x,y,dx,dy;
-	// The life of an engine dot 
-	// is a number starting at between 0 and 50 and counting backward.
-	float life;	// When reduced to 0, set active = 0
-};
-struct spacedot {
-	// Space dots are harmless background items
-	// All are active. When one falls off the edge, another is created at the start.
-	float x,y,dx;
-	Uint16 color;
-};
-
 // ************************************* VARS
 // SDL_Surface global variables
 SDL_Surface 
@@ -91,14 +55,12 @@ SDL_Surface
 	*surf_life,	// Indicator of number of ships remaining
 	*surf_rock[NROCKS],	// THE ROCKS
 	*surf_font_big;	// The big font
-
-struct shape rock_shapes[NROCKS];
+	
 
 SFont_Font *g_font;
 
 // Structure global variables
 struct enginedots edot[MAXENGINEDOTS], *dotptr = edot;
-struct rock_struct rock[MAXROCKS], *rockptr = rock;
 struct bangdots bdot[MAXBANGDOTS], *bdotptr = bdot;
 struct spacedot sdot[MAXSPACEDOTS];
 
@@ -106,21 +68,45 @@ struct spacedot sdot[MAXSPACEDOTS];
 char topline[1024];
 char *initerror = "";
 
+// Command-line argument parsing
+int opt_fullscreen;
+int opt_sound;
+int opt_music;
+float opt_gamespeed;
+int opt_tail_engine;
+int opt_friction;
+
+const char *argp_program_version = "Variations on Rockdodger " VERSION;
+const char *argp_program_bug_address = "<josh@qualdan.com>";
+static char doc[] = "VoR: Dodge the rocks until you die.";
+static struct argp_option opts[] = {
+	{0, 0, 0, 0, "Basic Options:", 0},
+	{"full-screen", 'f', 0, 0, "", 0},
+	{"music", 'm', 0, 0, "Enable music", 0},
+	{"silent", 's', 0, 0, "Turn off explosion sounds", 0},
+	{0, 0, 0, 0, "Gameplay Options:", 1},
+	{"game-speed", 'g', "N%", 0, "Game speed [50-100%]", 1},
+	{"engine", 'e', 0, 0, "Display large tail plume", 1},
+	{"old-physics", 'p', 0, 0, "Original physics (i.e. friction).", 1},
+	{0}
+};
+error_t parse_opt(int, char*, struct argp_state *);
+static struct argp argp = { opts, &parse_opt, 0, doc };
+
+
 struct shape shipshape;
-float shipx,shipy = 240.0;	// X position, 0..XSIZE
-float shipdx,shipdy;	// Change in X position per tick.
-float rockrate,rockspeed;
-float movementrate;  // this controls the speed of everything that moves.
-float yscroll;
-float scrollvel;
-
-int nships,score,initticks,ticks_since_last, last_ticks;
+float shipx = XSIZE/2, shipy = YSIZE/2;	// X position, 0..XSIZE
+float shipdx = 7.5, shipdy = 0.0;	// Change in X position per tick.
+float screendx = 7.5, screendy = 0.0;
+float xscroll, yscroll;
+float gamerate;  // this controls the speed of everything that moves.
+
+float bangx, bangy, bangdx, bangdy;
+
+int nships,score,ticks_since_last,last_ticks;
 int gameover;
-int countdown = 0;
 int maneuver = 0;
-int sound_flag = 1, music_flag = 0;
-int tail_plume = 0; // display big engine at the back?
-int friction = 0;	// should there be friction?
+
 float fadetimer = 0, faderate;
 
 int pausedown = 0, paused = 0;
@@ -142,7 +128,7 @@ float state_timeout = 600.0;
 #define NSEQUENCE 2
 char *sequence[] = {
 	"Press SPACE to start",
-	"http://qualdan.com/vor/"
+	"http://herkamire.com/jason/vor"
 };
 
 int bangdotlife, nbangdots;
@@ -152,12 +138,39 @@ char *data_dir;
 extern char *optarg;
 extern int optind, opterr, optopt;
 
-float dist_sq(float x1, float y1, float x2, float y2)
+// ************************************* FUNCS
+
+void
+init_opts(void)
 {
-	return (x2-x1)*(x2-x1) + (y2-y1)*(y2-y1);
+	opt_fullscreen = 0;
+	opt_sound = 1;
+	opt_music = 0;
+	opt_gamespeed = 1.00; // Run game at full speed.
+	// These switch back to the old gameplay and are off by default.
+	opt_tail_engine = 0;
+	opt_friction = 0;
 }
 
-// ************************************* FUNCS
+error_t
+parse_opt(int key, char *arg, struct argp_state *state)
+{
+	int i;
+
+	switch(key) {
+		case 'f': opt_fullscreen = 1; break;
+		case 'm': opt_music = 1; break;
+		case 's': opt_sound = 0; opt_music = 0; break;
+		case 'g': sscanf(arg, "%d%%", &i);
+				  if(i < 50) i = 50; else if(i > 100) i = 100;
+				  opt_gamespeed = (float)i / 100;
+				  break;
+		case 'e': opt_tail_engine = 1; break;
+		case 'p': opt_friction = 1; break;
+		default: break;
+	}
+	return 0;
+}
 
 float
 rnd() {
@@ -174,25 +187,18 @@ init_engine_dots() {
 
 void
 init_space_dots() {
-	int i,intensity;
+	int i,b;
 	for(i = 0; i<MAXSPACEDOTS; i++) {
-		float r;
-
 		sdot[i].x = rnd()*(XSIZE-5);
 		sdot[i].y = rnd()*(YSIZE-5);
-
-		r = rnd()*rnd();
-
-		sdot[i].dx = -r*4;
-		// -1/((1-r) + .3);
-		intensity = (int)(r*180 + 70);
-		sdot[i].color = SDL_MapRGB(surf_screen->format,intensity,intensity,intensity);
-
+		sdot[i].z = MAXDUSTDEPTH*sqrt(rnd());
+		b = (MAXDUSTDEPTH - sdot[i].z) * 255.0 / MAXDUSTDEPTH;
+		sdot[i].color = SDL_MapRGB(surf_screen->format, b, b, b);
 	}
 }
 
 void
-makebangdots(int xbang, int ybang, int dx, int dy, SDL_Surface *s, int power) {
+make_bang_dots(int xbang, int ybang, int dx, int dy, SDL_Surface *s, int power) {
 
 	// TODO - stop generating dots after a certain amount of time has passed, to cope with slower CPUs.
 	// TODO - generate and display dots in a circular buffer
@@ -256,6 +262,7 @@ draw_bang_dots(SDL_Surface *s) {
 	rawpixel = (Uint16 *) s->pixels;
 
 	first_i = -1;
+	last_i = 0;
 
 	for(i = bd1; (bd1 <= bd2)?(i<bd2):(i >= bd1 && i < bd2); last_i = ++i) {
 
@@ -272,8 +279,8 @@ draw_bang_dots(SDL_Surface *s) {
 			//last_i = i + 1;
 			rawpixel[(int)(s->pitch/2*(int)(bdot[i].y)) + (int)(bdot[i].x)] = bdot[i].c ? bdot[i].c : heatcolor[(int)(bdot[i].life*3)];
 			bdot[i].life -= bdot[i].decay;
-			bdot[i].x += bdot[i].dx*movementrate;
-			bdot[i].y += bdot[i].dy*movementrate + yscroll;
+			bdot[i].x += bdot[i].dx*gamerate - xscroll;
+			bdot[i].y += bdot[i].dy*gamerate - yscroll;
 
 			if(bdot[i].life<0)
 			bdot[i].active = 0;
@@ -303,16 +310,12 @@ draw_space_dots(SDL_Surface *s) {
 			sdot[i].y = 0;
 		}
 		rawpixel[(int)(s->pitch/2*(int)sdot[i].y) + (int)(sdot[i].x)] = sdot[i].color;
-		sdot[i].x += sdot[i].dx*movementrate;
-		sdot[i].y += yscroll;
-		if(sdot[i].y > YSIZE) {
-			sdot[i].y -= YSIZE;
-		} else if(sdot[i].y < 0) {
-			sdot[i].y += YSIZE;
-		}
-		if(sdot[i].x<0) {
-			sdot[i].x = XSIZE;
-		}
+		sdot[i].x -= xscroll / (1.3 + sdot[i].z);
+		sdot[i].y -= yscroll / (1.3 + sdot[i].z);
+		if(sdot[i].y >= XSIZE) sdot[i].x -= XSIZE;
+		else if(sdot[i].x < 0) sdot[i].x = XSIZE-1;
+		if(sdot[i].y > YSIZE) sdot[i].y -= YSIZE;
+		else if(sdot[i].y < 0) sdot[i].y += YSIZE-1;
 	}
 }
 
@@ -324,9 +327,9 @@ draw_engine_dots(SDL_Surface *s) {
 
 	for(i = 0; i<MAXENGINEDOTS; i++) {
 		if(edot[i].active) {
-			edot[i].x += edot[i].dx*movementrate;
-			edot[i].y += edot[i].dy*movementrate + yscroll;
-			if((edot[i].life -= movementrate*3)<0 || edot[i].y<0 || edot[i].y>YSIZE) {
+			edot[i].x += edot[i].dx*gamerate - xscroll;
+			edot[i].y += edot[i].dy*gamerate - yscroll;
+			if((edot[i].life -= gamerate*3)<0 || edot[i].y<0 || edot[i].y>YSIZE) {
 				edot[i].active = 0;
 			} else if(edot[i].x<0 || edot[i].x>XSIZE) {
 				edot[i].active = 0;
@@ -345,10 +348,10 @@ create_engine_dots(int newdots) {
 	int i;
 	double theta,r,dx,dy;
 
-	if(!tail_plume) return;
+	if(!opt_tail_engine) return;
 
 	if(state == GAMEPLAY) {
-		for(i = 0; i<newdots*movementrate; i++) {
+		for(i = 0; i<newdots*gamerate; i++) {
 			if(dotptr->active == 0) {
 				theta = rnd()*M_PI*2;
 				r = rnd();
@@ -431,24 +434,7 @@ void
 drawdots(SDL_Surface *s) {
 	int m;
 
-	SDL_LockSurface(s);
-	// Draw the background stars aka space dots
-	draw_space_dots(s);
-
-	// Draw the score when playing the game or whn the game is freshly over
-	if(1 || state == GAMEPLAY || state == DEAD_PAUSE || state == GAME_OVER ) {
-		SDL_UnlockSurface(s);
-
-		snprintscore_line(topline, 50, score);
-		SFont_Write(s,g_font,XSIZE-250,0,topline);
-
-		SDL_LockSurface(s);
-	}
-
-	// Draw all the engine dots
-	draw_engine_dots(s);
-
-	// Create more engine dots comin out da back
+	// Create more engine dots comin' out da back
 	if(!gameover) create_engine_dots(200);
 
 	// Create engine dots out the side we're moving from
@@ -458,16 +444,15 @@ drawdots(SDL_Surface *s) {
 		}
 	}
 
-	// Draw all outstanding bang dots
-	//if(bangdotlife-- > 0) 
+	SDL_LockSurface(s);
+	draw_space_dots(s);
+	draw_engine_dots(s);
 	draw_bang_dots(s);
-
 	SDL_UnlockSurface(s);
 }
 
-		char a[MAX_PATH_LEN];
 int
-init(int fullscreen) {
+init(void) {
 
 	int i;
 	SDL_Surface *temp;
@@ -477,16 +462,16 @@ init(int fullscreen) {
 	if(!find_files()) exit(1);
 	read_high_score_table();
 
-	if(sound_flag) {
+	if(opt_sound) {
 		// Initialize SDL with audio and video
 		if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) != 0) {
-			sound_flag = 0;
+			opt_sound = 0;
 			printf ("Can't open sound, starting without it\n");
 			atexit(SDL_Quit);
 		} else {
 			atexit(SDL_Quit);
 			atexit(SDL_CloseAudio);
-			sound_flag = init_sound();
+			opt_sound = init_sound();
 		}
 	} else {
 		// Initialize with video only
@@ -498,7 +483,7 @@ init(int fullscreen) {
 
 	// Attempt to get the required video size
 	flag = SDL_DOUBLEBUF | SDL_HWSURFACE;
-	if(fullscreen) flag |= SDL_FULLSCREEN;
+	if(opt_fullscreen) flag |= SDL_FULLSCREEN;
 	surf_screen = SDL_SetVideoMode(XSIZE,YSIZE,16,flag);
 
 	// Set the title bar text
@@ -545,13 +530,7 @@ init(int fullscreen) {
 	init_engine_dots();
 	init_space_dots();
 
-	// Load all our lovely rocks
-	for(i = 0; i<NROCKS; i++) {
-		snprintf(a,MAX_PATH_LEN,add_path("sprites/rock%02d.png"),i);
-		NULLERROR(temp = IMG_Load(a));
-		NULLERROR(surf_rock[i] = SDL_DisplayFormat(temp));
-		get_shape(surf_rock[i], &rock_shapes[i]);
-	}
+	init_rocks();
 
 	// Remove the mouse cursor
 #ifdef SDL_DISABLE
@@ -564,18 +543,13 @@ init(int fullscreen) {
 int
 draw() {
 	int i;
-	SDL_Rect src,dest;
+	SDL_Rect dest;
 	int bang, x;
 	char *text;
 	float fadegame,fadeover;
 
 	bang = 0;
 
-	src.x = 0;
-	src.y = 0;
-	dest.x = 0;
-	dest.y = 0;
-
 	// Draw a fully black background
 	SDL_FillRect(surf_screen,NULL,0);
 
@@ -584,32 +558,25 @@ draw() {
 
 	// Draw ship
 	if(!gameover && state == GAMEPLAY ) {
-		src.w = surf_ship->w;
-		src.h = surf_ship->h;
-		dest.w = src.w;
-		dest.h = src.h;
-		dest.x = (int)shipx;
-		dest.y = (int)shipy;
-		SDL_BlitSurface(surf_ship,&src,surf_screen,&dest);
+		dest.x = shipx;
+		dest.y = shipy;
+		SDL_BlitSurface(surf_ship,NULL,surf_screen,&dest);
 	}
 
-	// Draw all the rocks, in all states
-	for(i = 0; i<MAXROCKS; i++) {
-		if(rock[i].active) {
+	draw_rocks();
 
-			src.w = rock[i].image->w;
-			src.h = rock[i].image->h;
-			dest.w = src.w;
-			dest.h = src.h;
-			dest.x = (int) rock[i].x;
-			dest.y = (int) rock[i].y;
-
-			// Draw the rock
-			SDL_BlitSurface(rock[i].image,&src,surf_screen,&dest);
-
-		}
+	// Draw the life indicators.
+	if(state == GAMEPLAY || state == DEAD_PAUSE || state == GAME_OVER)
+	for(i = 0; i<nships-1; i++) {
+		dest.x = (i + 1)*(surf_life->w + 10);
+		dest.y = 20;
+		SDL_BlitSurface(surf_life, NULL, surf_screen, &dest);
 	}
 
+	// Draw the score
+	snprintscore_line(topline, 50, score);
+	SFont_Write(surf_screen, g_font, XSIZE-250, 0, topline);
+
 	// If it's game over, show the game over graphic in the dead centre
 	switch (state) {
 		case GAME_OVER:
@@ -627,53 +594,33 @@ draw() {
 				fadeover = 1.0;
 			}
 
-			src.w = surf_b_game->w;
-			src.h = surf_b_game->h;
-			dest.w = src.w;
-			dest.h = src.h;
-			dest.x = (XSIZE-src.w)/2;
-			dest.y = (YSIZE-src.h)/2-40;
-			SDL_SetAlpha(surf_b_game, SDL_SRCALPHA, (int)(fadegame*(200 + 55*cos(fadetimer += movementrate/1.0))));
-			SDL_BlitSurface(surf_b_game,&src,surf_screen,&dest);
-
-			src.w = surf_b_over->w;
-			src.h = surf_b_over->h;
-			dest.w = src.w;
-			dest.h = src.h;
-			dest.x = (XSIZE-src.w)/2;
-			dest.y = (YSIZE-src.h)/2 + 40;
+			dest.x = (XSIZE-surf_b_game->w)/2;
+			dest.y = (YSIZE-surf_b_game->h)/2-40;
+			SDL_SetAlpha(surf_b_game, SDL_SRCALPHA, (int)(fadegame*(200 + 55*cos(fadetimer += gamerate/1.0))));
+			SDL_BlitSurface(surf_b_game,NULL,surf_screen,&dest);
+
+			dest.x = (XSIZE-surf_b_over->w)/2;
+			dest.y = (YSIZE-surf_b_over->h)/2 + 40;
 			SDL_SetAlpha(surf_b_over, SDL_SRCALPHA, (int)(fadeover*(200 + 55*sin(fadetimer))));
-			SDL_BlitSurface(surf_b_over,&src,surf_screen,&dest);
+			SDL_BlitSurface(surf_b_over,NULL,surf_screen,&dest);
 		break;
 
 		case TITLE_PAGE:
 
-			src.w = surf_b_variations->w;
-			src.h = surf_b_variations->h;
-			dest.w = src.w;
-			dest.h = src.h;
-			dest.x = (XSIZE-src.w)/2 + cos(fadetimer/6.5)*10;
-			dest.y = (YSIZE/2-src.h)/2 + sin(fadetimer/5.0)*10;
-			SDL_SetAlpha(surf_b_variations, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer += movementrate/2.0)));
-			SDL_BlitSurface(surf_b_variations,&src,surf_screen,&dest);
-
-			src.w = surf_b_on->w;
-			src.h = surf_b_on->h;
-			dest.w = src.w;
-			dest.h = src.h;
-			dest.x = (XSIZE-src.w)/2 + cos((fadetimer + 1.0)/6.5)*10;
-			dest.y = (YSIZE/2-src.h)/2 + surf_b_variations->h + 20 + sin((fadetimer + 1.0)/5.0)*10;
+			dest.x = (XSIZE-surf_b_variations->w)/2 + cos(fadetimer/6.5)*10;
+			dest.y = (YSIZE/2-surf_b_variations->h)/2 + sin(fadetimer/5.0)*10;
+			SDL_SetAlpha(surf_b_variations, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer += gamerate/2.0)));
+			SDL_BlitSurface(surf_b_variations,NULL,surf_screen,&dest);
+
+			dest.x = (XSIZE-surf_b_on->w)/2 + cos((fadetimer + 1.0)/6.5)*10;
+			dest.y = (YSIZE/2-surf_b_on->h)/2 + surf_b_variations->h + 20 + sin((fadetimer + 1.0)/5.0)*10;
 			SDL_SetAlpha(surf_b_on, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-1.0)));
-			SDL_BlitSurface(surf_b_on,&src,surf_screen,&dest);
-
-			src.w = surf_b_rockdodger->w;
-			src.h = surf_b_rockdodger->h;
-			dest.w = src.w;
-			dest.h = src.h;
-			dest.x = (XSIZE-src.w)/2 + cos((fadetimer + 2.0)/6.5)*10;
-			dest.y = (YSIZE/2-src.h)/2 + surf_b_variations->h + surf_b_on->h + 40 + sin((fadetimer + 2.0)/5)*10;
+			SDL_BlitSurface(surf_b_on,NULL,surf_screen,&dest);
+
+			dest.x = (XSIZE-surf_b_rockdodger->w)/2 + cos((fadetimer + 2.0)/6.5)*10;
+			dest.y = (YSIZE/2-surf_b_rockdodger->h)/2 + surf_b_variations->h + surf_b_on->h + 40 + sin((fadetimer + 2.0)/5)*10;
 			SDL_SetAlpha(surf_b_rockdodger, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-2.0)));
-			SDL_BlitSurface(surf_b_rockdodger,&src,surf_screen,&dest);
+			SDL_BlitSurface(surf_b_rockdodger,NULL,surf_screen,&dest);
 
 			text = "Version " VERSION;
 			x = (XSIZE-SFont_TextWidth(g_font,text))/2 + sin(fadetimer/4.5)*10;
@@ -710,42 +657,16 @@ draw() {
 	}
 
 	if(!gameover && state == GAMEPLAY) {
-		for(i=0; i<MAXROCKS; i++) {
-			if(rock[i].active) {
-				if(collide(shipx-rock[i].x, shipy-rock[i].y, rock[i].shape, &shipshape)) 
-					bang = 1;
-			}
-		}
+		bang = hit_rocks(shipx, shipy, &shipshape);
 	}
 
-	// Draw all the little ships
-	if(state == GAMEPLAY || state == DEAD_PAUSE || state == GAME_OVER)
-	for(i = 0; i<nships-1; i++) {
-		src.w = surf_life->w;
-		src.h = surf_life->h;
-		dest.w = src.w;
-		dest.h = src.h;
-		dest.x = (i + 1)*(src.w + 10);
-		dest.y = 20;
-		SDL_BlitSurface(surf_life,&src,surf_screen,&dest);
-	}
-
-
-	// Update the score
-	/*
-	n = SDL_GetTicks()-initticks;
-	if(score)
-	ticks_since_last = n-score;
-	score = n;
-	*/
-
 	ticks_since_last = SDL_GetTicks()-last_ticks;
 	last_ticks = SDL_GetTicks();
 	if(ticks_since_last>200 || ticks_since_last<0) {
-		movementrate = 0;
+		gamerate = 0;
 	}
 	else {
-		movementrate = GAMESPEED*ticks_since_last/50.0;
+		gamerate = opt_gamespeed*ticks_since_last/50.0;
 		if(state == GAMEPLAY) {
 			score += ticks_since_last;
 		}
@@ -760,21 +681,20 @@ draw() {
 
 int
 gameloop() {
-	int i = 0;
 	Uint8 *keystate;
+	float tmp;
 
 
 	for(;;) {
 		if(!paused) {
 			// Count down the game loop timer, and change state when it gets to zero or less;
 
-			if((state_timeout -= movementrate*3) < 0) {
+			if((state_timeout -= gamerate*3) < 0) {
 				switch(state) {
 					case DEAD_PAUSE:
 						// Create a new ship and start all over again
 						state = GAMEPLAY;
 						play_tune(1);
-						shipx -= 50;
 						break;
 					case GAME_OVER:
 						state = HIGH_SCORE_ENTRY;
@@ -817,150 +737,91 @@ gameloop() {
 						blast_radius = BLAST_RADIUS * (DEAD_PAUSE_LENGTH - state_timeout) / 20.0;
 						fixonly = 0;
 					}
+					blast_rocks(bangx, bangy, blast_radius, fixonly);
 
-					if(shipx < 60) shipx = 60;
-					for(i = 0; i<MAXROCKS; i++ ) {
-						float dx, dy, n;
-						if(rock[i].x <= 0) continue;
-
-						// This makes it so your explosion from dying magically doesn't leave
-						// any rocks that aren't moving much on the x axis. After the first
-						// 20 tics, only rocks that are barely moving will be pushed.
-						if(fixonly && (!rock[i].dead || rock[i].dx < -4 || rock[i].dx > 3)) {
-							continue;
-						}
-
-						dx = rock[i].x - shipx;
-						dy = rock[i].y - shipy;
-
-						n = sqrt(dx*dx + dy*dy);
-						if(n < blast_radius) {
-							n *= 20;
-							rock[i].dx += rockrate*(dx+30)/n;
-							rock[i].dy += rockrate*dy/n;
-							rock[i].dead = 1;
-						}
-					}
+					if(bangx < 60) bangx = 60;
 				}
 			}
 
-			if(--countdown <= 0 && (rnd()*100.0<(rockrate += 0.025))) {
-				// Create a rock
-				rockptr++;
-				if(rockptr-rock >= MAXROCKS) {
-					rockptr = rock;
-				}
-				if(!rockptr->active) {
-					rockptr->x = (float)XSIZE;
-					rockptr->dx = -(rockspeed)*(1 + rnd());
-					rockptr->dy = rnd()-0.5;
-					rockptr->type_number = random() % NROCKS;
-					rockptr->image = surf_rock[rockptr->type_number];// [random()%NROCKS];
-					rockptr->shape = &rock_shapes[rockptr->type_number];
-					rockptr->active = 1;
-					rockptr->y = rnd()*(YSIZE + rockptr->image->h);
-				}
-				if(movementrate>0.1) {
-					countdown = (int)(ROCKRATE/movementrate);
-				} else {
-					countdown = 0;
-				}
-			}
+			new_rocks();
 
 			// FRICTION?
-			if(friction) {
-				shipdx *= pow((double)0.9,(double)movementrate);
-				shipdy *= pow((double)0.9,(double)movementrate);
-				// if(abs(shipdx)<0.00001) shipdx = 0;
-				// if(abs(shipdy)<0.00001) shipdy = 0;
+			if(opt_friction) {
+				shipdx *= pow((double)0.9,(double)gamerate);
+				shipdy *= pow((double)0.9,(double)gamerate);
 			}
 
 			// INERTIA
-			shipx += shipdx*movementrate;
-			shipy += shipdy*movementrate;
+			shipx += shipdx*gamerate;
+			shipy += shipdy*gamerate;
 
 			// SCROLLING
-			yscroll = shipy - (YSIZE / 2);
-			yscroll += shipdy * 25;
-			yscroll /= -25;
-			yscroll = ((scrollvel * (12 - movementrate)) + (yscroll * movementrate)) / 12;
-			scrollvel = yscroll;
-			yscroll = yscroll*movementrate;
-			shipy += yscroll;
-			
-			// Move all the rocks
-			for(i = 0; i < MAXROCKS; i++) {
-				if(rock[i].active) {
-					rock[i].x += rock[i].dx*movementrate;
-					rock[i].y += rock[i].dy*movementrate + yscroll;
-					if(rock[i].y > YSIZE || rock[i].y < -rock[i].image->h) {
-						if(rock[i].dead) {
-							rock[i].dead = 0;
-							rock[i].active = 0;
-						} else {
-							// wrap
-							rock[i].y = (YSIZE - rock[i].image->h) - rock[i].y;
-							rock[i].y += (rock[i].dy*movementrate + yscroll) * 1.01;
-						}
-					}
-					if(rock[i].x < -rock[i].image->w || rock[i].x > XSIZE) {
-						rock[i].active = 0;
-						rock[i].dead = 0;
-					}
-				}
-			}
+			tmp = shipy - (YSIZE / 2);
+			tmp += shipdy * 25;
+			tmp /= -25;
+			tmp = ((screendy * (gamerate - 12)) + (tmp * gamerate)) / 12;
+			screendy = -tmp;
+			tmp = shipx - (XSIZE / 3);
+			tmp += shipdx * 25;
+			tmp /= -25;
+			tmp = ((screendx * (gamerate - 12)) + (tmp * gamerate)) / 12;
+			screendx = -tmp;
+			if(screendx < 7.5) screendx=7.5;
+
+			xscroll = screendx * gamerate;
+			yscroll = screendy * gamerate;
+			shipx -= xscroll;
+			shipy -= yscroll;
+
+			// move bang center
+			bangx += bangdx*gamerate - xscroll;
+			bangy += bangdy*gamerate - yscroll;
+
+			move_rocks();
 
 
 			// BOUNCE X
 			if(shipx<0 || shipx>XSIZE-surf_ship->w) {
 				// BOUNCE from left and right wall
-				shipx -= shipdx*movementrate;
-				shipdx *= -0.99;
+				shipx -= (shipdx-screendx)*gamerate;
+				shipdx = 2*screendx-shipdx;
 			}
 
 			// BOUNCE Y
 			if(shipy<0 || shipy>YSIZE-surf_ship->h) {
 				// BOUNCE from top and bottom wall
-				shipy -= shipdy;
-				shipdy *= -0.99;
+				shipy -= (shipdy-screendy)*gamerate;
+				shipdy = 2*screendy-shipdy;
 			}
 
 
 			if(draw() && state == GAMEPLAY) {
-				// Play the explosion sound
-				play_sound(0);
-				makebangdots(shipx,shipy,shipdx,shipdy,surf_ship,30);
+				// Died
+				play_sound(0); // Play the explosion sound
+				bangx = shipx; bangy = shipy; bangdx = shipdx; bangdy = shipdy;
+				make_bang_dots(shipx,shipy,shipdx,shipdy,surf_ship,30);
+				shipdx *= 0.5; shipdy *= 0.5;
 				if(--nships <= 0) {
-					gameover = 1;
 					state = GAME_OVER;
+					gameover = 1;
+					shipdx = 8; shipdy = 0;
 					state_timeout = 200.0;
 					fadetimer = 0.0;
-					faderate = movementrate;
+					faderate = gamerate;
 				}
 				else {
 					state = DEAD_PAUSE;
 					state_timeout = DEAD_PAUSE_LENGTH;
-					shipdx = 0;
-					shipdy = 0;
 				}
 			}
 
 			SDL_PumpEvents();
 			keystate = SDL_GetKeyState(NULL);
 
-			if(state != HIGH_SCORE_ENTRY && (keystate[SDLK_q] || keystate[SDLK_ESCAPE])) {
-				return 0;
-			}
-
+			// new game
 			if(keystate[SDLK_SPACE] && (state == HIGH_SCORE_DISPLAY || state == TITLE_PAGE)) {
 
-				for(i = 0; i<MAXROCKS; i++ ) {
-					rock[i].active = 0;
-					rock[i].dead = 0;
-				}
-
-				rockrate = 54.0;
-				rockspeed = 5.0;
+				reset_rocks();
 
 				nships = 4;
 				score = 0;
@@ -969,10 +830,8 @@ gameloop() {
 				play_tune(1);
 
 				gameover = 0;
-				shipx = 0;
-				shipy = YSIZE/2;
-				shipdx = -1;
-				shipdy = 0;
+				shipx = XSIZE/2.2; shipy = YSIZE/2;
+				shipdx = screendx; shipdy = screendy;
 			}
 
 			maneuver = 0;
@@ -985,10 +844,10 @@ gameloop() {
 			if(!gameover) {
 
 				if(!paused) {
-					if(keystate[SDLK_UP] | keystate[SDLK_c])		{ shipdy -= 1.5*movementrate; maneuver |= 1<<3;}
-					if(keystate[SDLK_DOWN] | keystate[SDLK_t])		{ shipdy += 1.5*movementrate; maneuver |= 1<<1;}
-					if(keystate[SDLK_LEFT] | keystate[SDLK_h])		{ shipdx -= 1.5*movementrate; maneuver |= 1<<2;}
-					if(keystate[SDLK_RIGHT] | keystate[SDLK_n])		{ shipdx += 1.5*movementrate; maneuver |= 1;}
+					if(keystate[SDLK_UP] | keystate[SDLK_c])		{ shipdy -= 1.5*gamerate; maneuver |= 1<<3;}
+					if(keystate[SDLK_DOWN] | keystate[SDLK_t])		{ shipdy += 1.5*gamerate; maneuver |= 1<<1;}
+					if(keystate[SDLK_LEFT] | keystate[SDLK_h])		{ shipdx -= 1.5*gamerate; maneuver |= 1<<2;}
+					if(keystate[SDLK_RIGHT] | keystate[SDLK_n])		{ shipdx += 1.5*gamerate; maneuver |= 1;}
 					if(keystate[SDLK_3])		{ SDL_SaveBMP(surf_screen, "snapshot.bmp"); }
 				}
 
@@ -1011,61 +870,26 @@ gameloop() {
 				state_timeout = -1;
 			}
 		}
+
+		if(state != HIGH_SCORE_ENTRY && (keystate[SDLK_q] || keystate[SDLK_ESCAPE])) {
+			return 0;
+		}
+
 	}
 }
 
 int
 main(int argc, char **argv) {
-	int i, x, fullscreen;
-
-	fullscreen = 0;
-	tail_plume = 0;
-	friction = 0;
-	sound_flag = 1;
-	music_flag = 0;
-
-	while ((x = getopt(argc,argv,"efhmps")) >= 0) {
-		switch(x) {
-			case 'e': // engine
-				tail_plume = 1;
-			break;
-			case 'f': // fullscreen
-				fullscreen = 1;
-			break;
-			case 'h': // help
-				printf("Variations on RockDodger\n"
-				       " -e big tail [E]ngine\n"
-				       " -f [F]ull screen\n"
-				       " -h this [H]elp message\n"
-				       " -m enable [M]usic\n"
-				       " -p original [P]hysics (friction)\n"
-				       " -s [S]ilent (no sound)\n");
-				exit(0);
-			break;
-			case 'm': // music
-				music_flag = 1;
-			case 'p': // physics
-				friction = 1;
-			break;
-			case 's': // silent
-				sound_flag = 0;
-				music_flag = 0;
-			break;
-		}
-	}
+	init_opts();
+
+	argp_parse(&argp, argc, argv, 0, 0, 0);
 
-	if(init(fullscreen)) {
+	if(init()) {
 		printf ("ta: '%s'\n",initerror);
 		return 1;
 	}
 
-	for(i = 0; i<MAXROCKS; i++) {
-		rock[i].active = 0;
-		rock[i].dead = 0;
-	}
-	rockrate = 54.0;
-	rockspeed = 5.0;
-	initticks = SDL_GetTicks();
+	reset_rocks();
 	gameloop();
 
 	return 0;