* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+#include <argp.h>
+#include <math.h>
+#include <SDL/SDL.h>
+#include <SDL/SDL_image.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "SFont.h"
+
#ifdef DEBUG
#include "debug.h"
#endif
#include "args.h"
+#include "common.h"
#include "config.h"
#include "file.h"
#include "globals.h"
#include "shape.h"
#include "sound.h"
-#include <argp.h>
-#include <math.h>
-#include <SDL/SDL.h>
-#include <SDL/SDL_image.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "SFont.h"
-
// ************************************* VARS
// SDL_Surface global variables
SDL_Surface
float shipdx = SCREENDXMIN, shipdy = 0.0; // Change in X position per tick.
float screendx = SCREENDXMIN, screendy = 0.0;
float xscroll, yscroll;
-float gamerate; // this controls the speed of everything that moves.
+float back_dist;
+float framelen; // this controls the speed of everything that moves.
float bangx, bangy, bangdx, bangdy;
extern char *optarg;
extern int optind, opterr, optopt;
+#define TO_TICKS(seconds) ((seconds)*20*opt_gamespeed)
+
// ************************************* FUNCS
float
//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*gamerate - xscroll;
- bdot[i].y += bdot[i].dy*gamerate - yscroll;
+ bdot[i].x += bdot[i].dx*framelen - xscroll;
+ bdot[i].y += bdot[i].dy*framelen - yscroll;
if(bdot[i].life<0)
bdot[i].active = 0;
for(i = 0; i<MAXENGINEDOTS; i++) {
if(edot[i].active) {
- 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].x += edot[i].dx*framelen - xscroll;
+ edot[i].y += edot[i].dy*framelen - yscroll;
+ if((edot[i].life -= framelen*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;
if(!opt_tail_engine) return;
if(state == GAMEPLAY) {
- for(i = 0; i<newdots*gamerate; i++) {
+ for(i = 0; i<newdots*framelen; i++) {
if(dotptr->active == 0) {
theta = rnd()*M_PI*2;
r = rnd();
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_SetAlpha(surf_b_game, SDL_SRCALPHA, (int)(fadegame*(200 + 55*cos(fadetimer += framelen/1.0))));
SDL_BlitSurface(surf_b_game,NULL,surf_screen,&dest);
dest.x = (XSIZE-surf_b_over->w)/2;
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_SetAlpha(surf_b_variations, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer += framelen/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;
last_ticks = SDL_GetTicks();
if(ticks_since_last>200 || ticks_since_last<0) {
// We won't run at all below 5 frames per second.
- gamerate = 0;
+ framelen = 0;
} else {
- gamerate = opt_gamespeed*ticks_since_last/50.0;
+ framelen = opt_gamespeed*ticks_since_last/50.0;
if(state == GAMEPLAY) {
score += ticks_since_last;
}
if(!paused) {
// Count down the game loop timer, and change state when it gets to zero or less;
- if((state_timeout -= gamerate*3) < 0) {
+ if((state_timeout -= framelen*3) < 0) {
switch(state) {
case DEAD_PAUSE:
// Create a new ship and start all over again
// FRICTION?
if(opt_friction) {
- shipdx *= pow((double)0.9,(double)gamerate);
- shipdy *= pow((double)0.9,(double)gamerate);
+ shipdx *= pow((double)0.9,(double)framelen);
+ shipdy *= pow((double)0.9,(double)framelen);
}
// INERTIA
- shipx += shipdx*gamerate;
- shipy += shipdy*gamerate;
+ shipx += shipdx*framelen;
+ shipy += shipdy*framelen;
// SCROLLING
tmp = shipy - (YSIZE / 2);
tmp += shipdy * 25;
tmp /= -25;
- tmp = ((screendy * (gamerate - 12)) + (tmp * gamerate)) / 12;
+ tmp = ((screendy * (framelen - 12)) + (tmp * framelen)) / 12;
screendy = -tmp;
tmp = shipx - (XSIZE / 3);
tmp += shipdx * 25;
tmp /= -25;
- tmp = ((screendx * (gamerate - 12)) + (tmp * gamerate)) / 12;
+ tmp = ((screendx * (framelen - 12)) + (tmp * framelen)) / 12;
screendx = -tmp;
- if(screendx < SCREENDXMIN) screendx=SCREENDXMIN;
- xscroll = screendx * gamerate;
- yscroll = screendy * gamerate;
+ // taper off if we would hit the barrier in under 2 seconds.
+ if(back_dist + (screendx - SCREENDXMIN)*TO_TICKS(2) < 0) {
+ screendx = SCREENDXMIN - (back_dist/TO_TICKS(2));
+ }
+
+ xscroll = screendx * framelen;
+ yscroll = screendy * framelen;
+ back_dist += (screendx - SCREENDXMIN)*framelen;
+ if(opt_max_lead >= 0) back_dist = min(back_dist, opt_max_lead);
+
shipx -= xscroll;
shipy -= yscroll;
// move bang center
- bangx += bangdx*gamerate - xscroll;
- bangy += bangdy*gamerate - yscroll;
+ bangx += bangdx*framelen - xscroll;
+ bangy += bangdy*framelen - yscroll;
move_rocks();
// BOUNCE X
if(shipx<0 || shipx>XSIZE-surf_ship->w) {
// BOUNCE from left and right wall
- shipx -= (shipdx-screendx)*gamerate;
+ shipx -= (shipdx-screendx)*framelen;
shipdx = screendx - (shipdx-screendx)*opt_bounciness;
}
// BOUNCE Y
if(shipy<0 || shipy>YSIZE-surf_ship->h) {
// BOUNCE from top and bottom wall
- shipy -= (shipdy-screendy)*gamerate;
+ shipy -= (shipdy-screendy)*framelen;
shipdy = screendy - (shipdy-screendy)*opt_bounciness;
}
shipdx = 8; shipdy = 0;
state_timeout = 200.0;
fadetimer = 0.0;
- faderate = gamerate;
+ faderate = framelen;
}
else {
state = DEAD_PAUSE;
if(!gameover) {
if(!paused) {
- 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_UP] | keystate[SDLK_c]) { shipdy -= 1.5*framelen; maneuver |= 1<<3;}
+ if(keystate[SDLK_DOWN] | keystate[SDLK_t]) { shipdy += 1.5*framelen; maneuver |= 1<<1;}
+ if(keystate[SDLK_LEFT] | keystate[SDLK_h]) { shipdx -= 1.5*framelen; maneuver |= 1<<2;}
+ if(keystate[SDLK_RIGHT] | keystate[SDLK_n]) { shipdx += 1.5*framelen; maneuver |= 1;}
if(keystate[SDLK_3]) { SDL_SaveBMP(surf_screen, "snapshot.bmp"); }
}
Got questions, comments, patches, etc.? Contact Jason Woofenden