mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-06-16 22:29:29 +00:00
91 lines
1.5 KiB
C
91 lines
1.5 KiB
C
/* for demoscene, you need a plasma effect... */
|
|
/* https://rosettacode.org/wiki/Plasma_effect */
|
|
/* https://www.bidouille.org/prog/plasma */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <math.h>
|
|
|
|
#include "tfv_zp.h"
|
|
#include "gr-sim.h"
|
|
|
|
#define pi 3.14159265358979323846264338327950
|
|
|
|
|
|
#if 0
|
|
static unsigned char color_lookup[]={0x0, 0x0, 0x5, 0x5,
|
|
0x7, 0x7, 0xf, 0xf,
|
|
0x7, 0x7, 0x6, 0x6,
|
|
0x2, 0x2, 0x5, 0x5};
|
|
#endif
|
|
|
|
static unsigned char color_lookup[]={0x0, 0x5, 0x7, 0xf,
|
|
0x7, 0x6, 0x2, 0x5,
|
|
0x0, 0x5, 0x7, 0xf,
|
|
0x7, 0x6, 0x2, 0x5};
|
|
|
|
|
|
|
|
int main(int argc, char **argv) {
|
|
|
|
int ch,xx,yy,col;
|
|
// double dx,dy,dv;
|
|
double r;
|
|
double sec=0.0;
|
|
|
|
grsim_init();
|
|
|
|
gr();
|
|
soft_switch(MIXCLR);
|
|
|
|
clear_screens();
|
|
|
|
ram[DRAW_PAGE]=0x0;
|
|
|
|
while(1) {
|
|
|
|
// sec+=0.00625;
|
|
sec+=0.000625;
|
|
|
|
for(yy=0;yy<48;yy++) {
|
|
for(xx=0;xx<40;xx++) {
|
|
|
|
// r=sin(8*((xx*2)*sin(sec/2)+(yy*2)*cos(sec/4))+sec/8);
|
|
|
|
r=sin(8*((xx*2)*sin(sec/2)+(yy*4)*cos(sec/4))+sec/128);
|
|
|
|
|
|
|
|
|
|
// printf("%d %d %f %f %f %f\n",xx,yy,dx,dy,dv,r);
|
|
// setcolor(COLOR(255*fabs(sin(dv*pi)),255*fabs(sin(dv*pi + 2*pi/3)),255*fabs(sin(dv*pi + 4*pi/3))));
|
|
|
|
|
|
col=(int)((r+1)*8);
|
|
if ((col<0) || (col>15)) {
|
|
printf("Invalid color %d\n",col);
|
|
}
|
|
color_equals(color_lookup[col]);
|
|
plot(xx,yy);
|
|
}
|
|
|
|
}
|
|
|
|
grsim_update();
|
|
ch=grsim_input();
|
|
if (ch=='q') exit(0);
|
|
|
|
if (ch==' ') {
|
|
while(1) {
|
|
ch=grsim_input();
|
|
if (ch) break;
|
|
}
|
|
}
|
|
usleep(20000);
|
|
|
|
}
|
|
|
|
return 0;
|
|
}
|