/* * cacaball Metaballs effect using libcaca * Copyright (c) 2003-2004 Jean-Yves Lamoureux * All Rights Reserved * * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA * 02111-1307 USA */ #include "../config.h" #include #include #include #include #include "caca.h" /* Virtual buffer size */ #define XSIZ 128 #define YSIZ 128 #define METASIZE 64 #define METACENTER (METASIZE/2) static struct caca_bitmap *caca_bitmap; static unsigned char *bitmap; unsigned char MetaBoule[METASIZE*METASIZE]; void drawBalls(unsigned int bx, unsigned int by); void cutBalls(unsigned int bx, unsigned int by); void generateBalls(void); /* Screen palette */ const static int pal[] = { 0, 0, 0, 0, 0, 6, 0, 0, 6, 0, 0, 7, 0, 0, 8, 0, 0, 8, 0, 0, 9, 0, 0, 10, 2, 0, 10, 4, 0, 9, 6, 0, 9, 8, 0, 8, 10, 0, 7, 12, 0, 7, 14, 0, 6, 16, 0, 5, 18, 0, 5, 20, 0, 4, 22, 0, 4, 24, 0, 3, 26, 0, 2, 28, 0, 2, 30, 0, 1, 32, 0, 0, 32, 0, 0, 33, 0, 0, 34, 0, 0, 35, 0, 0, 36, 0, 0, 36, 0, 0, 37, 0, 0, 38, 0, 0, 39, 0, 0, 40, 0, 0, 40, 0, 0, 41, 0, 0, 42, 0, 0, 43, 0, 0, 44, 0, 0, 45, 0, 0, 46, 1, 0, 47, 1, 0, 48, 2, 0, 49, 2, 0, 50, 3, 0, 51, 3, 0, 52, 4, 0, 53, 4, 0, 54, 5, 0, 55, 5, 0, 56, 6, 0, 57, 6, 0, 58, 7, 0, 59, 7, 0, 60, 8, 0, 61, 8, 0, 63, 9, 0, 63, 9, 0, 63, 10, 0, 63, 10, 0, 63, 11, 0, 63, 11, 0, 63, 12, 0, 63, 12, 0, 63, 13, 0, 63, 13, 0, 63, 14, 0, 63, 14, 0, 63, 15, 0, 63, 15, 0, 63, 16, 0, 63, 16, 0, 63, 17, 0, 63, 17, 0, 63, 18, 0, 63, 18, 0, 63, 19, 0, 63, 19, 0, 63, 20, 0, 63, 20, 0, 63, 21, 0, 63, 21, 0, 63, 22, 0, 63, 22, 0, 63, 23, 0, 63, 24, 0, 63, 24, 0, 63, 25, 0, 63, 25, 0, 63, 26, 0, 63, 26, 0, 63, 27, 0, 63, 27, 0, 63, 28, 0, 63, 28, 0, 63, 29, 0, 63, 29, 0, 63, 30, 0, 63, 30, 0, 63, 31, 0, 63, 31, 0, 63, 32, 0, 63, 32, 0, 63, 33, 0, 63, 33, 0, 63, 34, 0, 63, 34, 0, 63, 35, 0, 63, 35, 0, 63, 36, 0, 63, 36, 0, 63, 37, 0, 63, 38, 0, 63, 38, 0, 63, 39, 0, 63, 39, 0, 63, 40, 0, 63, 40, 0, 63, 41, 0, 63, 41, 0, 63, 42, 0, 63, 42, 0, 63, 43, 0, 63, 43, 0, 63, 44, 0, 63, 44, 0, 63, 45, 0, 63, 45, 0, 63, 46, 0, 63, 46, 0, 63, 47, 0, 63, 47, 0, 63, 48, 0, 63, 48, 0, 63, 49, 0, 63, 49, 0, 63, 50, 0, 63, 50, 0, 63, 51, 0, 63, 52, 0, 63, 52, 0, 63, 52, 0, 63, 52, 0, 63, 52, 0, 63, 53, 0, 63, 53, 0, 63, 53, 0, 63, 53, 0, 63, 54, 0, 63, 54, 0, 63, 54, 0, 63, 54, 0, 63, 54, 0, 63, 55, 0, 63, 55, 0, 63, 55, 0, 63, 55, 0, 63, 56, 0, 63, 56, 0, 63, 56, 0, 63, 56, 0, 63, 57, 0, 63, 57, 0, 63, 57, 0, 63, 57, 0, 63, 57, 0, 63, 58, 0, 63, 58, 0, 63, 58, 0, 63, 58, 0, 63, 59, 0, 63, 59, 0, 63, 59, 0, 63, 59, 0, 63, 60, 0, 63, 60, 0, 63, 60, 0, 63, 60, 0, 63, 60, 0, 63, 61, 0, 63, 61, 0, 63, 61, 0, 63, 61, 0, 63, 62, 0, 63, 62, 0, 63, 62, 0, 63, 62, 0, 63, 63, 0, 63, 63, 1, 63, 63, 2, 63, 63, 3, 63, 63, 4, 63, 63, 5, 63, 63, 6, 63, 63, 7, 63, 63, 8, 63, 63, 9, 63, 63, 10, 63, 63, 10, 63, 63, 11, 63, 63, 12, 63, 63, 13, 63, 63, 14, 63, 63, 15, 63, 63, 16, 63, 63, 17, 63, 63, 18, 63, 63, 19, 63, 63, 20, 63, 63, 21, 63, 63, 21, 63, 63, 22, 63, 63, 23, 63, 63, 24, 63, 63, 25, 63, 63, 26, 63, 63, 27, 63, 63, 28, 63, 63, 29, 63, 63, 30, 63, 63, 31, 63, 63, 31, 63, 63, 32, 63, 63, 33, 63, 63, 34, 63, 63, 35, 63, 63, 36, 63, 63, 37, 63, 63, 38, 63, 63, 39, 63, 63, 40, 63, 63, 41, 63, 63, 42, 63, 63, 42, 63, 63, 43, 63, 63, 44, 63, 63, 45, 63, 63, 46, 63, 63, 47, 63, 63, 48, 63, 63, 49, 63, 63, 50, 63, 63, 51, 63, 63, 52, 63, 63, 52, 63, 63, 53, 63, 63, 54, 63, 63, 55, 63, 63, 56, 63, 63, 57, 63, 63, 58, 63, 63, 59, 63, 63, 60, 63, 63, 61, 63, 63, 62, 63, 63, 63}; int main(int argc, char **argv) { int quit = 0; float i=0, j=0, k=0; int p; unsigned int x1=0, yy1=0; unsigned int x2=20, y2=70; unsigned int x3=30, y3=20; int r[256], g[256], b[256], a[256]; if(caca_init()) return 1; caca_set_delay(40000); /* Make the palette eatable by libcaca */ for (p = 0; p < 256; p++) { b[p] = pal[p * 3] * 64; g[p] = pal[p * 3 + 1] * 64; r[p] = pal[p * 3 + 2] * 64; a[p] = 0xfff; } /* Create the bitmap */ caca_bitmap = caca_create_bitmap(8, XSIZ, YSIZ, XSIZ, 0, 0, 0, 0); /* Set the palette */ caca_set_bitmap_palette(caca_bitmap, r, g, b, a); /* Our virtual buffer */ bitmap = malloc(XSIZ * YSIZ * sizeof(char)); /* Generate ball sprite */ generateBalls(); /* Go ! */ while(!quit) { /* Get event and test it for a key pressure */ int event = caca_get_event(CACA_EVENT_KEY_PRESS); if((event & CACA_EVENT_KEY_PRESS)) { quit = 1; } /* Silly paths for our balls */ x1 = abs(sin(i)*(XSIZ-METASIZE)); yy1 = abs(cos(j)*(YSIZ-METASIZE)); x2 = abs(cos(j*2)*(XSIZ-METASIZE)); y2 = abs(cos(i/2)*(YSIZ-METASIZE)); x3 = abs(cos(k*2)*(XSIZ-METASIZE)); y3 = abs(cos(i+j/2)*(YSIZ-METASIZE)); /* Here is all the trick. Maybe if you're that clever you'll understand. */ drawBalls(x1,x2); drawBalls(x2,y2); drawBalls(x3,y3); i+=0.01; j+=0.02; k+=0.03; /* Draw our virtual buffer to screen, letting libcaca resize it */ caca_draw_bitmap(0, 0, caca_get_width() , caca_get_height(), caca_bitmap, bitmap); caca_refresh(); memset(bitmap, 0, XSIZ*YSIZ); } /* End, bye folks */ caca_end(); return 0; } /* You missed the trick ? */ void drawBalls(unsigned int bx, unsigned int by) { unsigned int color; unsigned int i, e=0; unsigned int b = (by*XSIZ)+bx; for(i=0;i255) color = 255; bitmap[b] = color; if(e==METASIZE){e=0;b+=(XSIZ-(METASIZE));} b++; e++; } } /* 'Limit' the color to 100, to have the cropped effect */ void cutBalls(unsigned int bx, unsigned int by) { unsigned int i, e=0; unsigned int b = (by*XSIZ)+bx; for(i=0;i 15) MetaBoule[x+y*METASIZE] = 0; } }