dos33fsprogs/gr-sim/rasterbars_fixed.c

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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <math.h>
#include "gr-sim.h"
static int row_color[40];
#define ELEMENTS 64
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static int fixed_sin[ELEMENTS][2]={
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{0x00,0x00}, // 0.000000
{0x00,0x19}, // 0.098017
{0x00,0x31}, // 0.195090
{0x00,0x4A}, // 0.290285
{0x00,0x61}, // 0.382683
{0x00,0x78}, // 0.471397
{0x00,0x8E}, // 0.555570
{0x00,0xA2}, // 0.634393
{0x00,0xB5}, // 0.707107
{0x00,0xC5}, // 0.773010
{0x00,0xD4}, // 0.831470
{0x00,0xE1}, // 0.881921
{0x00,0xEC}, // 0.923880
{0x00,0xF4}, // 0.956940
{0x00,0xFB}, // 0.980785
{0x00,0xFE}, // 0.995185
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{0x00,0xFF}, // 1.000000
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{0x00,0xFE}, // 0.995185
{0x00,0xFB}, // 0.980785
{0x00,0xF4}, // 0.956940
{0x00,0xEC}, // 0.923880
{0x00,0xE1}, // 0.881921
{0x00,0xD4}, // 0.831470
{0x00,0xC5}, // 0.773010
{0x00,0xB5}, // 0.707107
{0x00,0xA2}, // 0.634393
{0x00,0x8E}, // 0.555570
{0x00,0x78}, // 0.471397
{0x00,0x61}, // 0.382683
{0x00,0x4A}, // 0.290285
{0x00,0x31}, // 0.195090
{0x00,0x19}, // 0.098017
{0x00,0x00}, // 0.000000
{0xFF,0xE7}, // -0.098017
{0xFF,0xCF}, // -0.195090
{0xFF,0xB6}, // -0.290285
{0xFF,0x9F}, // -0.382683
{0xFF,0x88}, // -0.471397
{0xFF,0x72}, // -0.555570
{0xFF,0x5E}, // -0.634393
{0xFF,0x4B}, // -0.707107
{0xFF,0x3B}, // -0.773010
{0xFF,0x2C}, // -0.831470
{0xFF,0x1F}, // -0.881921
{0xFF,0x14}, // -0.923880
{0xFF,0x0C}, // -0.956940
{0xFF,0x05}, // -0.980785
{0xFF,0x02}, // -0.995185
{0xFF,0x00}, // -1.000000
{0xFF,0x02}, // -0.995185
{0xFF,0x05}, // -0.980785
{0xFF,0x0C}, // -0.956940
{0xFF,0x14}, // -0.923880
{0xFF,0x1F}, // -0.881921
{0xFF,0x2C}, // -0.831470
{0xFF,0x3B}, // -0.773010
{0xFF,0x4B}, // -0.707107
{0xFF,0x5E}, // -0.634393
{0xFF,0x72}, // -0.555570
{0xFF,0x88}, // -0.471397
{0xFF,0x9F}, // -0.382683
{0xFF,0xB6}, // -0.290285
{0xFF,0xCF}, // -0.195090
{0xFF,0xE7}, // -0.098017
};
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static int set_row_color(int offset, int color) {
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int y=0,s=0;
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short x;
offset&=(ELEMENTS-1);
x=(fixed_sin[offset][0]<<8) | (fixed_sin[offset][1]&0xff);
y=x>>4;
if (y<0) s=-1; else if (y==0) s=0; else s=1;
// printf("Offset=%d Result=%hd y=%d,%d s=%d\n",offset,x,y,y-s,s);
row_color[y+18]=color;
row_color[y-s+18]=color;
return 0;
}
int main(int argc, char **argv) {
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int ch,i=0,j,end=3;
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grsim_init();
gr();
clear_screens();
while(1) {
/* clear old colors */
for(j=0;j<40;j++) row_color[j]=0;
gr();
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set_row_color(i+0,14); // aqua
set_row_color(i+1,6); // med-blue
set_row_color(i+2,12); // light-green
set_row_color(i+3,4); // green
set_row_color(i+4,13); // yellow
set_row_color(i+5,9); // orange
set_row_color(i+6,11); // pink
set_row_color(i+7,1); // red
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for(j=0;j<40;j++) {
if (row_color[j]) {
color_equals(row_color[j]);
hlin(0,0,40,j);
}
}
grsim_update();
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ch=grsim_input();
if (ch=='q') exit(0);
usleep(100000);
i++;
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if (i>(ELEMENTS-1)) {
i=0;
end--;
if (end==0) break;
}
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// printf("\n");
}
return 0;
}