mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-08-14 10:29:46 +00:00
71 lines
1.2 KiB
C
71 lines
1.2 KiB
C
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/* for demoscene, you need a plasma effect... */
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/* https://rosettacode.org/wiki/Plasma_effect */
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/* https://www.bidouille.org/prog/plasma */
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <math.h>
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#include "tfv_zp.h"
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#include "gr-sim.h"
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#define pi 3.14159265358979323846264338327950
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unsigned char colors[]={15,13,9,1,8,5,0,0};
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int main(int argc, char **argv) {
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int ch,xx,yy,sec=128;
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double dx,dy,dv,r;
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grsim_init();
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gr();
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clear_screens();
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color_equals(15);
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hlin(0,0,40,39);
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ram[DRAW_PAGE]=0x0;
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while(1) {
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sec++;
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for(yy=0;yy<40;yy++) {
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for(xx=0;xx<40;xx++) {
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// dx = xx + .5 * sin(sec/5.0);
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dx = sin(xx+sec);
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dy = yy + .5 * cos(sec/3.0);
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dv = sin(xx*10 + sec) +
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sin(10*(xx*sin(sec/2.0) +
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yy*cos(sec/3.0)) + sec) +
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sin(sqrt(100*(dx*dx + dy*dy)+1) + sec);
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r=fabs(sin(dv*pi))*16;
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printf("%d %d %f %f %f %f\n",xx,yy,dx,dy,dv,r);
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// setcolor(COLOR(255*fabs(sin(dv*pi)),255*fabs(sin(dv*pi + 2*pi/3)),255*fabs(sin(dv*pi + 4*pi/3))));
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color_equals(fabs(dx)*16);
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plot(xx,yy);
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//plot(xx-r+2,yy);
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// printf("plot %d,%d = %d\n",xx,yy,colors[col]);
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}
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}
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grsim_update();
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ch=grsim_input();
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if (ch=='q') exit(0);
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usleep(20000);
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}
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return 0;
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}
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