neingeist/cscape
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- b0rk

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neingeist 2002-05-20 16:45:17 +00:00
parent 98fae707ee
commit 055f7a0c76
3 changed files with 32 additions and 29 deletions
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56
cscape.c
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@ -9,7 +9,7 @@
#define MEERESSPIEGEL 48 #define MEERESSPIEGEL 48
#define BLICKWEITE 55 #define BLICKWEITE 55
#define FLUGHOEHE 30 #define FLUGHOEHE 100
#define MAPSIZE 256 #define MAPSIZE 256
int sintab[360]; int sintab[360];
@ -37,7 +37,7 @@ void fly(SDL_Surface *screen) {
int iy, ix, iy1, iyp, ixp; int iy, ix, iy1, iyp, ixp;
int x, y, z, s, i, j; int x, y, z, s, i, j;
int map_color; int map_color;
int rng[320]; int rng[WIDTH];
if(SDL_MUSTLOCK(screen)) if(SDL_MUSTLOCK(screen))
if(SDL_LockSurface(screen) < 0) { if(SDL_LockSurface(screen) < 0) {
@ -47,62 +47,62 @@ void fly(SDL_Surface *screen) {
} }
/* Richtung wechseln? */ /* Richtung wechseln? */
/* if (java.lang.Math.random()<0.5) if (rand()<RAND_MAX/2) {
if (java.lang.Math.random()<1.0) if (rand()<RAND_MAX) {
if (richtung <= 0) richtung = 357; if (richtung <= 0) { richtung = 357; }
else richtung -= 3; else { richtung -= 3; }
else } else {
if (richtung >= 357) richtung = 0; if (richtung >= 357) { richtung = 0; }
else richtung += 3; else { richtung += 3; }
*/ }
}
/* Bewegen ... */ /* Bewegen ... */
posy = posy + costab[richtung] / 32; posy = posy + costab[richtung] / 32;
posx = posx + sintab[richtung] / 32; posx = posx + sintab[richtung] / 32;
posy %= MAPSIZE; posy %= MAPSIZE; if(posy<0) posy+=MAPSIZE;
posx %= MAPSIZE; posx %= MAPSIZE; if(posx<0) posx+=MAPSIZE;
/* Absolute Höhe berechnen */ /* Absolute Höhe berechnen */
flughoehe = 100; flughoehe = FLUGHOEHE + map[posy*MAPSIZE+posx]/2;
/* flughoehe = FLUGHOEHE + ... */
/* FIXME */ /* FIXME */
for (i=0;i<320;i++) rng[i] = 200; for (i=0;i<WIDTH;i++) rng[i] = HEIGHT;
SDL_FillRect(screen, NULL, 0); SDL_FillRect(screen, NULL, 0);
for (iy=posy; iy<=posy+BLICKWEITE; iy++) { for (iy=posy; iy<=posy+BLICKWEITE; iy++) {
iy1 = 2 * (iy-posy) + 1; iy1 = 2 * (iy-posy) + 1;
s = 4 + 300 / iy1; s = 4 + (WIDTH-20) / iy1;
for (ix=posx-(iy-posy); ix<=posx+(iy-posy); ix++) { for (ix=posx-(iy-posy); ix<=posx+(iy-posy); ix++) {
ixp = posx ixp = posx
+ ((ix-posx) * costab[richtung] + ((ix-posx) * costab[richtung]
+ (iy-posy) * sintab[richtung]) / 128; + (iy-posy) * sintab[richtung]) /(MAPSIZE/2);
iyp = posy iyp = posy
+ ((iy-posy) * costab[richtung] + ((iy-posy) * costab[richtung]
- (ix-posx) * sintab[richtung]) / 128; - (ix-posx) * sintab[richtung]) /(MAPSIZE/2);
x = 160 + 360*(ix-posx) / iy1; x = WIDTH/2 + 360*(ix-posx) / iy1;
if( if(
(x>=0) && (x+s<=318) (x>=0) && (x+s<=WIDTH-2)
&& ((256*iyp+ixp) > 0) && ((MAPSIZE*iyp+ixp) > 0)
&& ((256*iyp+ixp) < 256*256) && ((MAPSIZE*iyp+ixp) < MAPSIZE*MAPSIZE)
) { ) {
map_color = map[256*iyp+ixp]; map_color = map[MAPSIZE*iyp+ixp];
z = map[256*iyp+ixp]; z = map[MAPSIZE*iyp+ixp];
if(z<MEERESSPIEGEL) z = MEERESSPIEGEL; if(z<MEERESSPIEGEL) z = MEERESSPIEGEL;
y = 100 + 30 * (flughoehe-z) / iy1; y = HEIGHT/2 + 30 * (flughoehe-z) / iy1;
if ((y>=0) && (y<=199)) { if ((y>=0) && (y<=HEIGHT-1)) {
for (j=x;j<=x+s;j++) for (j=x;j<=x+s;j++)
for (i=rng[j];i>=y;i--) { for (i=rng[j];i>=y;i--) {
if ((320*i+j>=0) && (320*i+j<320*200)) if ((WIDTH*i+j>=0) && (WIDTH*i+j<WIDTH*HEIGHT))
sdl_putpixel(screen, j, i, map_color); sdl_putpixel(screen, j, i, map_color);
if (y<rng[j]) rng[j] = y; if (y<rng[j]) rng[j] = y;
}} }}
@ -111,7 +111,7 @@ void fly(SDL_Surface *screen) {
} }
if(SDL_MUSTLOCK(screen)) SDL_UnlockSurface(screen); if(SDL_MUSTLOCK(screen)) SDL_UnlockSurface(screen);
SDL_UpdateRect(screen, 0, 0, 320, 200); SDL_UpdateRect(screen, 0, 0, WIDTH, HEIGHT);
usleep(1000/25); usleep(1000/25);
} }

3
sdl.c
View file

@ -2,11 +2,12 @@
#include <SDL.h> #include <SDL.h>
#include <stdlib.h> #include <stdlib.h>
#include "sdl.h"
SDL_Surface* sdl_init() { SDL_Surface* sdl_init() {
SDL_Surface* screen; SDL_Surface* screen;
screen = SDL_SetVideoMode(640, 480, 8, SDL_SWSURFACE); screen = SDL_SetVideoMode(WIDTH, HEIGHT, 8, SDL_SWSURFACE);
if(screen == NULL) { if(screen == NULL) {
fprintf(stderr, "Unable to set video mode: %s\n", fprintf(stderr, "Unable to set video mode: %s\n",
SDL_GetError()); SDL_GetError());

2
sdl.h
View file

@ -1,4 +1,6 @@
/* $Revision$ */ /* $Revision$ */
#define WIDTH 640
#define HEIGHT 480
SDL_Surface* sdl_init(); SDL_Surface* sdl_init();
void sdl_putpixel(SDL_Surface *surface, int x, int y, Uint32 pixel); void sdl_putpixel(SDL_Surface *surface, int x, int y, Uint32 pixel);