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vsn1/c/main
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Archimedes archive » Archimedes World » AW_Vol15_Issue7 CD ROM Index Disc.adf » coders |
| Filename: | vsn1/c/main |
| Read OK: | ✔ |
| File size: | 0F89 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "bbc.h"
#include "os.h"
#include "ass.h"
#define OS_Byte 6
#define PI 3.1415926536
#define lone 16
#define one (1<<lone)
#define fptod(i) ( (int)(0.5+(int)(i)/6.5536)/10000.0 )
#define dtofp(i) ( (int)(0.5+(double)(i)*one) )
typedef enum {multi, nonmulti} monitor;
int maxsx=1280;
int maxsy=1024;
int e[3]={dtofp(1.2F),dtofp(1.3F),dtofp(1.6F)};
int d[3]={0,0,0};
double theta=0, ctheta=1, stheta=0;
int mx[3][3]={one,0,0, 0,one,0, 0,0,one};
int ppd=6*one, xsc=3*one;
int bank=1;
int mode;
void press(int i)
{
for (;bbc_inkey(i)!=-1;);
return;
}
void release(int i)
{
for (;bbc_inkey(i)!=0;);
return;
}
monitor read_monitor_type(void)
{
int r1;
os_swi3r(0x58, 1,0,0, 0,&r1,0);
if (r1 != 0) return multi;
else return nonmulti;
}
void tidy(void)
{
os_swi2(OS_Byte, 112, 1);
os_swi2(OS_Byte, 113, 1);
}
void swap_banks(void)
{
os_swi2(OS_Byte, 113, bank);
os_swi2(OS_Byte, 112, bank=3-bank);
}
void prepare_screen(void)
{
bank=1;
os_swi2(OS_Byte, 112, bank);
os_swi2(OS_Byte, 113, 3-bank);
}
void calc_trans(int *e, int *d, int mx[][3])
{
double f[3], m[2][3];
double r2, r, s;
double a=stheta, b=ctheta;
f[0]=fptod(d[0]-e[0]); f[1]=fptod(d[1]-e[1]); f[2]=fptod(d[2]-e[2]);
r2=f[0]*f[0]+f[2]*f[2]; r=sqrt(r2); s=sqrt(r2+f[1]*f[1]);
if (!s) {
mx[0][0]=dtofp(b); mx[0][1]=dtofp(-a); mx[0][2]=0;
mx[1][0]=dtofp(a); mx[1][1]=dtofp(b); mx[1][2]=0;
mx[2][0]=0; mx[2][1]=0; mx[2][2]=one;
}
else
if (!r) {
s=1/s;
mx[0][0]=dtofp(b); mx[0][1]=dtofp(-a*r*s); mx[0][2]=dtofp(a*f[1]*s);
mx[1][0]=dtofp(a); mx[1][1]=dtofp(b*r*s); mx[1][2]=dtofp(-b*f[1]*s);
mx[2][0]=0; mx[2][1]=dtofp(f[1]*s); mx[2][2]=dtofp(r*s);
}
else {
s=1/s; r2=1/r;
m[0][0]=r2*f[2]; m[0][1]=0; m[0][2]=-r2*f[0];
m[1][0]=-r2*s*f[0]*f[1]; m[1][1]=s*r; m[1][2]=-r2*s*f[1]*f[2];
mx[2][0]=dtofp(s*f[0]); mx[2][1]=dtofp(s*f[1]); mx[2][2]=dtofp(s*f[2]);
mx[0][0]=dtofp(b*m[0][0]-a*m[1][0]); mx[0][1]=dtofp(b*m[0][1]-a*m[1][1]); mx[0][2]=dtofp(b*m[0][2]-a*m[1][2]);
mx[1][0]=dtofp(a*m[0][0]+b*m[1][0]); mx[1][1]=dtofp(a*m[0][1]+b*m[1][1]); mx[1][2]=dtofp(a*m[0][2]+b*m[1][2]);
}
}
int project_vertex(int *v, int *s, int mx[][3])
{
int c[3];
int b[3], m;
int x, y, flag;
c[0] = *v++-e[0]; c[1] = *v++-e[1]; c[2] = *v-e[2];
b[0] = mul_frac16c(c[0],mx[0][0]) + mul_frac16c(c[1],mx[0][1]) + mul_frac16c(c[2],mx[0][2]);
b[1] = mul_frac16c(c[0],mx[1][0]) + mul_frac16c(c[1],mx[1][1]) + mul_frac16c(c[2],mx[1][2]);
b[2] = mul_frac16c(c[0],mx[2][0]) + mul_frac16c(c[1],mx[2][1]) + mul_frac16c(c[2],mx[2][2]);
m = div_frac16(ppd*640, mul_frac16(b[2],xsc));
x = (mul_frac16(-m,b[0])+one/2)/one+640;
y = (mul_frac16(m,b[1])+one/2)/one+512;
flag = b[2]<one/16 ? 16 : 0;
if (x<0) flag|=1;
if (x>maxsx) flag|=2;
if (y<0) flag|=4;
if (y>maxsy) flag|=8;
*s++=x; *s=y;
return flag;
}
int wav(int x, int y, int t)
{
int r=sqrt_frac16(mul_frac16(x,x)+mul_frac16(y,y))-t;
return mul_frac16c(x*5, sin16(r*32)/8);
}
int main(void)
{
int s[2], p[3];
int i, j, t, di;
mode = read_monitor_type()==multi ? 18 : 0;
atexit(tidy);
tidy();
bbc_mode(mode+128);
bbc_mode(mode);
printf("Please enter dot separation (suggest 1-8) ");
scanf("%i", &di);
prepare_screen();
e[0]=dtofp(1.2F);
e[1]=dtofp(0.3F);
e[2]=dtofp(0.9F);
d[0]=dtofp(0.0F);
d[1]=dtofp(0.01F);
d[2]=dtofp(0.1F);
calc_trans(e, d, mx);
for (t=8*one/128;;) {
for (; t<one/8; t+=one/128) {
bbc_cls();
for (i=0; i<140; i+=di)
for (j=0; j<210; j+=di) {
p[0]=wav((210-j)*one/1024, (i-70)*one/1024, t);
p[1]=(i-70)*one/160;
p[2]=(j-105)*one/160;
project_vertex(p, s, mx);
bbc_plot(69, s[0], s[1]);
}
os_swi1(OS_Byte, 19);
swap_banks();
}
t = 0;
}
return 0;
}
00000000 23 69 6e 63 6c 75 64 65 20 3c 73 74 64 69 6f 2e |#include <stdio.|
00000010 68 3e 0a 23 69 6e 63 6c 75 64 65 20 3c 73 74 64 |h>.#include <std|
00000020 6c 69 62 2e 68 3e 0a 23 69 6e 63 6c 75 64 65 20 |lib.h>.#include |
00000030 3c 6d 61 74 68 2e 68 3e 0a 23 69 6e 63 6c 75 64 |<math.h>.#includ|
00000040 65 20 22 62 62 63 2e 68 22 0a 23 69 6e 63 6c 75 |e "bbc.h".#inclu|
00000050 64 65 20 22 6f 73 2e 68 22 0a 0a 23 69 6e 63 6c |de "os.h"..#incl|
00000060 75 64 65 20 22 61 73 73 2e 68 22 0a 0a 23 64 65 |ude "ass.h"..#de|
00000070 66 69 6e 65 20 4f 53 5f 42 79 74 65 20 36 0a 23 |fine OS_Byte 6.#|
00000080 64 65 66 69 6e 65 20 50 49 20 33 2e 31 34 31 35 |define PI 3.1415|
00000090 39 32 36 35 33 36 0a 23 64 65 66 69 6e 65 20 6c |926536.#define l|
000000a0 6f 6e 65 20 31 36 0a 23 64 65 66 69 6e 65 20 6f |one 16.#define o|
000000b0 6e 65 20 28 31 3c 3c 6c 6f 6e 65 29 0a 23 64 65 |ne (1<<lone).#de|
000000c0 66 69 6e 65 20 66 70 74 6f 64 28 69 29 20 28 20 |fine fptod(i) ( |
000000d0 28 69 6e 74 29 28 30 2e 35 2b 28 69 6e 74 29 28 |(int)(0.5+(int)(|
000000e0 69 29 2f 36 2e 35 35 33 36 29 2f 31 30 30 30 30 |i)/6.5536)/10000|
000000f0 2e 30 20 29 0a 23 64 65 66 69 6e 65 20 64 74 6f |.0 ).#define dto|
00000100 66 70 28 69 29 20 28 20 28 69 6e 74 29 28 30 2e |fp(i) ( (int)(0.|
00000110 35 2b 28 64 6f 75 62 6c 65 29 28 69 29 2a 6f 6e |5+(double)(i)*on|
00000120 65 29 20 29 0a 74 79 70 65 64 65 66 20 65 6e 75 |e) ).typedef enu|
00000130 6d 20 7b 6d 75 6c 74 69 2c 20 6e 6f 6e 6d 75 6c |m {multi, nonmul|
00000140 74 69 7d 20 6d 6f 6e 69 74 6f 72 3b 0a 0a 69 6e |ti} monitor;..in|
00000150 74 20 6d 61 78 73 78 3d 31 32 38 30 3b 0a 69 6e |t maxsx=1280;.in|
00000160 74 20 6d 61 78 73 79 3d 31 30 32 34 3b 0a 0a 69 |t maxsy=1024;..i|
00000170 6e 74 20 65 5b 33 5d 3d 7b 64 74 6f 66 70 28 31 |nt e[3]={dtofp(1|
00000180 2e 32 46 29 2c 64 74 6f 66 70 28 31 2e 33 46 29 |.2F),dtofp(1.3F)|
00000190 2c 64 74 6f 66 70 28 31 2e 36 46 29 7d 3b 0a 69 |,dtofp(1.6F)};.i|
000001a0 6e 74 20 64 5b 33 5d 3d 7b 30 2c 30 2c 30 7d 3b |nt d[3]={0,0,0};|
000001b0 0a 64 6f 75 62 6c 65 20 74 68 65 74 61 3d 30 2c |.double theta=0,|
000001c0 20 63 74 68 65 74 61 3d 31 2c 20 73 74 68 65 74 | ctheta=1, sthet|
000001d0 61 3d 30 3b 0a 69 6e 74 20 6d 78 5b 33 5d 5b 33 |a=0;.int mx[3][3|
000001e0 5d 3d 7b 6f 6e 65 2c 30 2c 30 2c 20 30 2c 6f 6e |]={one,0,0, 0,on|
000001f0 65 2c 30 2c 20 30 2c 30 2c 6f 6e 65 7d 3b 0a 69 |e,0, 0,0,one};.i|
00000200 6e 74 20 70 70 64 3d 36 2a 6f 6e 65 2c 20 78 73 |nt ppd=6*one, xs|
00000210 63 3d 33 2a 6f 6e 65 3b 0a 0a 69 6e 74 20 62 61 |c=3*one;..int ba|
00000220 6e 6b 3d 31 3b 0a 69 6e 74 20 6d 6f 64 65 3b 0a |nk=1;.int mode;.|
00000230 0a 76 6f 69 64 20 70 72 65 73 73 28 69 6e 74 20 |.void press(int |
00000240 69 29 0a 7b 0a 20 20 66 6f 72 20 28 3b 62 62 63 |i).{. for (;bbc|
00000250 5f 69 6e 6b 65 79 28 69 29 21 3d 2d 31 3b 29 3b |_inkey(i)!=-1;);|
00000260 0a 20 20 72 65 74 75 72 6e 3b 0a 7d 0a 0a 76 6f |. return;.}..vo|
00000270 69 64 20 72 65 6c 65 61 73 65 28 69 6e 74 20 69 |id release(int i|
00000280 29 0a 7b 0a 20 20 66 6f 72 20 28 3b 62 62 63 5f |).{. for (;bbc_|
00000290 69 6e 6b 65 79 28 69 29 21 3d 30 3b 29 3b 0a 20 |inkey(i)!=0;);. |
000002a0 20 72 65 74 75 72 6e 3b 0a 7d 0a 0a 6d 6f 6e 69 | return;.}..moni|
000002b0 74 6f 72 20 72 65 61 64 5f 6d 6f 6e 69 74 6f 72 |tor read_monitor|
000002c0 5f 74 79 70 65 28 76 6f 69 64 29 0a 7b 0a 20 20 |_type(void).{. |
000002d0 69 6e 74 20 72 31 3b 0a 20 20 6f 73 5f 73 77 69 |int r1;. os_swi|
000002e0 33 72 28 30 78 35 38 2c 20 31 2c 30 2c 30 2c 20 |3r(0x58, 1,0,0, |
000002f0 30 2c 26 72 31 2c 30 29 3b 0a 20 20 69 66 20 28 |0,&r1,0);. if (|
00000300 72 31 20 21 3d 20 30 29 20 72 65 74 75 72 6e 20 |r1 != 0) return |
00000310 6d 75 6c 74 69 3b 0a 20 20 65 6c 73 65 20 72 65 |multi;. else re|
00000320 74 75 72 6e 20 6e 6f 6e 6d 75 6c 74 69 3b 0a 7d |turn nonmulti;.}|
00000330 0a 0a 76 6f 69 64 20 74 69 64 79 28 76 6f 69 64 |..void tidy(void|
00000340 29 0a 7b 0a 20 20 6f 73 5f 73 77 69 32 28 4f 53 |).{. os_swi2(OS|
00000350 5f 42 79 74 65 2c 20 31 31 32 2c 20 31 29 3b 0a |_Byte, 112, 1);.|
00000360 20 20 6f 73 5f 73 77 69 32 28 4f 53 5f 42 79 74 | os_swi2(OS_Byt|
00000370 65 2c 20 31 31 33 2c 20 31 29 3b 0a 7d 0a 0a 76 |e, 113, 1);.}..v|
00000380 6f 69 64 20 73 77 61 70 5f 62 61 6e 6b 73 28 76 |oid swap_banks(v|
00000390 6f 69 64 29 0a 7b 0a 20 20 6f 73 5f 73 77 69 32 |oid).{. os_swi2|
000003a0 28 4f 53 5f 42 79 74 65 2c 20 31 31 33 2c 20 62 |(OS_Byte, 113, b|
000003b0 61 6e 6b 29 3b 0a 20 20 6f 73 5f 73 77 69 32 28 |ank);. os_swi2(|
000003c0 4f 53 5f 42 79 74 65 2c 20 31 31 32 2c 20 62 61 |OS_Byte, 112, ba|
000003d0 6e 6b 3d 33 2d 62 61 6e 6b 29 3b 0a 7d 0a 0a 76 |nk=3-bank);.}..v|
000003e0 6f 69 64 20 70 72 65 70 61 72 65 5f 73 63 72 65 |oid prepare_scre|
000003f0 65 6e 28 76 6f 69 64 29 0a 7b 0a 20 20 62 61 6e |en(void).{. ban|
00000400 6b 3d 31 3b 0a 20 20 6f 73 5f 73 77 69 32 28 4f |k=1;. os_swi2(O|
00000410 53 5f 42 79 74 65 2c 20 31 31 32 2c 20 62 61 6e |S_Byte, 112, ban|
00000420 6b 29 3b 0a 20 20 6f 73 5f 73 77 69 32 28 4f 53 |k);. os_swi2(OS|
00000430 5f 42 79 74 65 2c 20 31 31 33 2c 20 33 2d 62 61 |_Byte, 113, 3-ba|
00000440 6e 6b 29 3b 0a 7d 0a 0a 76 6f 69 64 20 63 61 6c |nk);.}..void cal|
00000450 63 5f 74 72 61 6e 73 28 69 6e 74 20 2a 65 2c 20 |c_trans(int *e, |
00000460 69 6e 74 20 2a 64 2c 20 69 6e 74 20 6d 78 5b 5d |int *d, int mx[]|
00000470 5b 33 5d 29 0a 7b 0a 20 20 64 6f 75 62 6c 65 20 |[3]).{. double |
00000480 66 5b 33 5d 2c 20 6d 5b 32 5d 5b 33 5d 3b 0a 20 |f[3], m[2][3];. |
00000490 20 64 6f 75 62 6c 65 20 72 32 2c 20 72 2c 20 73 | double r2, r, s|
000004a0 3b 0a 20 20 64 6f 75 62 6c 65 20 61 3d 73 74 68 |;. double a=sth|
000004b0 65 74 61 2c 20 62 3d 63 74 68 65 74 61 3b 0a 20 |eta, b=ctheta;. |
000004c0 20 66 5b 30 5d 3d 66 70 74 6f 64 28 64 5b 30 5d | f[0]=fptod(d[0]|
000004d0 2d 65 5b 30 5d 29 3b 09 66 5b 31 5d 3d 66 70 74 |-e[0]);.f[1]=fpt|
000004e0 6f 64 28 64 5b 31 5d 2d 65 5b 31 5d 29 3b 09 66 |od(d[1]-e[1]);.f|
000004f0 5b 32 5d 3d 66 70 74 6f 64 28 64 5b 32 5d 2d 65 |[2]=fptod(d[2]-e|
00000500 5b 32 5d 29 3b 0a 20 20 72 32 3d 66 5b 30 5d 2a |[2]);. r2=f[0]*|
00000510 66 5b 30 5d 2b 66 5b 32 5d 2a 66 5b 32 5d 3b 09 |f[0]+f[2]*f[2];.|
00000520 72 3d 73 71 72 74 28 72 32 29 3b 09 09 73 3d 73 |r=sqrt(r2);..s=s|
00000530 71 72 74 28 72 32 2b 66 5b 31 5d 2a 66 5b 31 5d |qrt(r2+f[1]*f[1]|
00000540 29 3b 20 20 0a 20 20 69 66 20 28 21 73 29 20 7b |); . if (!s) {|
00000550 0a 20 20 20 20 6d 78 5b 30 5d 5b 30 5d 3d 64 74 |. mx[0][0]=dt|
00000560 6f 66 70 28 62 29 3b 09 09 09 09 6d 78 5b 30 5d |ofp(b);....mx[0]|
00000570 5b 31 5d 3d 64 74 6f 66 70 28 2d 61 29 3b 09 09 |[1]=dtofp(-a);..|
00000580 09 6d 78 5b 30 5d 5b 32 5d 3d 30 3b 0a 20 20 20 |.mx[0][2]=0;. |
00000590 20 6d 78 5b 31 5d 5b 30 5d 3d 64 74 6f 66 70 28 | mx[1][0]=dtofp(|
000005a0 61 29 3b 09 09 09 09 6d 78 5b 31 5d 5b 31 5d 3d |a);....mx[1][1]=|
000005b0 64 74 6f 66 70 28 62 29 3b 09 09 09 6d 78 5b 31 |dtofp(b);...mx[1|
000005c0 5d 5b 32 5d 3d 30 3b 0a 20 20 20 20 6d 78 5b 32 |][2]=0;. mx[2|
000005d0 5d 5b 30 5d 3d 30 3b 09 09 09 09 09 6d 78 5b 32 |][0]=0;.....mx[2|
000005e0 5d 5b 31 5d 3d 30 3b 09 09 09 09 6d 78 5b 32 5d |][1]=0;....mx[2]|
000005f0 5b 32 5d 3d 6f 6e 65 3b 0a 20 20 7d 0a 20 20 65 |[2]=one;. }. e|
00000600 6c 73 65 0a 20 20 20 20 69 66 20 28 21 72 29 20 |lse. if (!r) |
00000610 7b 0a 20 20 20 20 20 20 73 3d 31 2f 73 3b 0a 20 |{. s=1/s;. |
00000620 20 20 20 20 20 6d 78 5b 30 5d 5b 30 5d 3d 64 74 | mx[0][0]=dt|
00000630 6f 66 70 28 62 29 3b 09 09 09 6d 78 5b 30 5d 5b |ofp(b);...mx[0][|
00000640 31 5d 3d 64 74 6f 66 70 28 2d 61 2a 72 2a 73 29 |1]=dtofp(-a*r*s)|
00000650 3b 09 09 09 6d 78 5b 30 5d 5b 32 5d 3d 64 74 6f |;...mx[0][2]=dto|
00000660 66 70 28 61 2a 66 5b 31 5d 2a 73 29 3b 0a 20 20 |fp(a*f[1]*s);. |
00000670 20 20 20 20 6d 78 5b 31 5d 5b 30 5d 3d 64 74 6f | mx[1][0]=dto|
00000680 66 70 28 61 29 3b 09 09 09 6d 78 5b 31 5d 5b 31 |fp(a);...mx[1][1|
00000690 5d 3d 64 74 6f 66 70 28 62 2a 72 2a 73 29 3b 09 |]=dtofp(b*r*s);.|
000006a0 09 09 6d 78 5b 31 5d 5b 32 5d 3d 64 74 6f 66 70 |..mx[1][2]=dtofp|
000006b0 28 2d 62 2a 66 5b 31 5d 2a 73 29 3b 0a 20 20 20 |(-b*f[1]*s);. |
000006c0 20 20 20 6d 78 5b 32 5d 5b 30 5d 3d 30 3b 09 09 | mx[2][0]=0;..|
000006d0 09 09 6d 78 5b 32 5d 5b 31 5d 3d 64 74 6f 66 70 |..mx[2][1]=dtofp|
000006e0 28 66 5b 31 5d 2a 73 29 3b 09 09 09 6d 78 5b 32 |(f[1]*s);...mx[2|
000006f0 5d 5b 32 5d 3d 64 74 6f 66 70 28 72 2a 73 29 3b |][2]=dtofp(r*s);|
00000700 0a 20 20 20 20 7d 0a 20 20 20 20 65 6c 73 65 20 |. }. else |
00000710 7b 0a 20 20 20 20 20 20 73 3d 31 2f 73 3b 20 72 |{. s=1/s; r|
00000720 32 3d 31 2f 72 3b 0a 20 20 20 20 20 20 6d 5b 30 |2=1/r;. m[0|
00000730 5d 5b 30 5d 3d 72 32 2a 66 5b 32 5d 3b 09 09 6d |][0]=r2*f[2];..m|
00000740 5b 30 5d 5b 31 5d 3d 30 3b 09 6d 5b 30 5d 5b 32 |[0][1]=0;.m[0][2|
00000750 5d 3d 2d 72 32 2a 66 5b 30 5d 3b 0a 20 20 20 20 |]=-r2*f[0];. |
00000760 20 20 6d 5b 31 5d 5b 30 5d 3d 2d 72 32 2a 73 2a | m[1][0]=-r2*s*|
00000770 66 5b 30 5d 2a 66 5b 31 5d 3b 09 6d 5b 31 5d 5b |f[0]*f[1];.m[1][|
00000780 31 5d 3d 73 2a 72 3b 09 6d 5b 31 5d 5b 32 5d 3d |1]=s*r;.m[1][2]=|
00000790 2d 72 32 2a 73 2a 66 5b 31 5d 2a 66 5b 32 5d 3b |-r2*s*f[1]*f[2];|
000007a0 0a 20 20 20 20 20 20 6d 78 5b 32 5d 5b 30 5d 3d |. mx[2][0]=|
000007b0 64 74 6f 66 70 28 73 2a 66 5b 30 5d 29 3b 09 09 |dtofp(s*f[0]);..|
000007c0 09 6d 78 5b 32 5d 5b 31 5d 3d 64 74 6f 66 70 28 |.mx[2][1]=dtofp(|
000007d0 73 2a 66 5b 31 5d 29 3b 09 09 09 6d 78 5b 32 5d |s*f[1]);...mx[2]|
000007e0 5b 32 5d 3d 64 74 6f 66 70 28 73 2a 66 5b 32 5d |[2]=dtofp(s*f[2]|
000007f0 29 3b 0a 20 20 20 20 20 20 6d 78 5b 30 5d 5b 30 |);. mx[0][0|
00000800 5d 3d 64 74 6f 66 70 28 62 2a 6d 5b 30 5d 5b 30 |]=dtofp(b*m[0][0|
00000810 5d 2d 61 2a 6d 5b 31 5d 5b 30 5d 29 3b 09 6d 78 |]-a*m[1][0]);.mx|
00000820 5b 30 5d 5b 31 5d 3d 64 74 6f 66 70 28 62 2a 6d |[0][1]=dtofp(b*m|
00000830 5b 30 5d 5b 31 5d 2d 61 2a 6d 5b 31 5d 5b 31 5d |[0][1]-a*m[1][1]|
00000840 29 3b 09 6d 78 5b 30 5d 5b 32 5d 3d 64 74 6f 66 |);.mx[0][2]=dtof|
00000850 70 28 62 2a 6d 5b 30 5d 5b 32 5d 2d 61 2a 6d 5b |p(b*m[0][2]-a*m[|
00000860 31 5d 5b 32 5d 29 3b 0a 20 20 20 20 20 20 6d 78 |1][2]);. mx|
00000870 5b 31 5d 5b 30 5d 3d 64 74 6f 66 70 28 61 2a 6d |[1][0]=dtofp(a*m|
00000880 5b 30 5d 5b 30 5d 2b 62 2a 6d 5b 31 5d 5b 30 5d |[0][0]+b*m[1][0]|
00000890 29 3b 09 6d 78 5b 31 5d 5b 31 5d 3d 64 74 6f 66 |);.mx[1][1]=dtof|
000008a0 70 28 61 2a 6d 5b 30 5d 5b 31 5d 2b 62 2a 6d 5b |p(a*m[0][1]+b*m[|
000008b0 31 5d 5b 31 5d 29 3b 09 6d 78 5b 31 5d 5b 32 5d |1][1]);.mx[1][2]|
000008c0 3d 64 74 6f 66 70 28 61 2a 6d 5b 30 5d 5b 32 5d |=dtofp(a*m[0][2]|
000008d0 2b 62 2a 6d 5b 31 5d 5b 32 5d 29 3b 0a 20 20 20 |+b*m[1][2]);. |
000008e0 20 7d 0a 7d 0a 0a 69 6e 74 20 70 72 6f 6a 65 63 | }.}..int projec|
000008f0 74 5f 76 65 72 74 65 78 28 69 6e 74 20 2a 76 2c |t_vertex(int *v,|
00000900 20 69 6e 74 20 2a 73 2c 20 69 6e 74 20 6d 78 5b | int *s, int mx[|
00000910 5d 5b 33 5d 29 0a 7b 0a 20 20 69 6e 74 20 63 5b |][3]).{. int c[|
00000920 33 5d 3b 0a 20 20 69 6e 74 20 62 5b 33 5d 2c 20 |3];. int b[3], |
00000930 6d 3b 0a 20 20 69 6e 74 20 78 2c 20 79 2c 20 66 |m;. int x, y, f|
00000940 6c 61 67 3b 0a 20 20 63 5b 30 5d 20 3d 20 2a 76 |lag;. c[0] = *v|
00000950 2b 2b 2d 65 5b 30 5d 3b 20 63 5b 31 5d 20 3d 20 |++-e[0]; c[1] = |
00000960 2a 76 2b 2b 2d 65 5b 31 5d 3b 20 63 5b 32 5d 20 |*v++-e[1]; c[2] |
00000970 3d 20 2a 76 2d 65 5b 32 5d 3b 0a 20 20 62 5b 30 |= *v-e[2];. b[0|
00000980 5d 20 3d 20 6d 75 6c 5f 66 72 61 63 31 36 63 28 |] = mul_frac16c(|
00000990 63 5b 30 5d 2c 6d 78 5b 30 5d 5b 30 5d 29 20 2b |c[0],mx[0][0]) +|
000009a0 20 6d 75 6c 5f 66 72 61 63 31 36 63 28 63 5b 31 | mul_frac16c(c[1|
000009b0 5d 2c 6d 78 5b 30 5d 5b 31 5d 29 20 2b 20 6d 75 |],mx[0][1]) + mu|
000009c0 6c 5f 66 72 61 63 31 36 63 28 63 5b 32 5d 2c 6d |l_frac16c(c[2],m|
000009d0 78 5b 30 5d 5b 32 5d 29 3b 0a 20 20 62 5b 31 5d |x[0][2]);. b[1]|
000009e0 20 3d 20 6d 75 6c 5f 66 72 61 63 31 36 63 28 63 | = mul_frac16c(c|
000009f0 5b 30 5d 2c 6d 78 5b 31 5d 5b 30 5d 29 20 2b 20 |[0],mx[1][0]) + |
00000a00 6d 75 6c 5f 66 72 61 63 31 36 63 28 63 5b 31 5d |mul_frac16c(c[1]|
00000a10 2c 6d 78 5b 31 5d 5b 31 5d 29 20 2b 20 6d 75 6c |,mx[1][1]) + mul|
00000a20 5f 66 72 61 63 31 36 63 28 63 5b 32 5d 2c 6d 78 |_frac16c(c[2],mx|
00000a30 5b 31 5d 5b 32 5d 29 3b 0a 20 20 62 5b 32 5d 20 |[1][2]);. b[2] |
00000a40 3d 20 6d 75 6c 5f 66 72 61 63 31 36 63 28 63 5b |= mul_frac16c(c[|
00000a50 30 5d 2c 6d 78 5b 32 5d 5b 30 5d 29 20 2b 20 6d |0],mx[2][0]) + m|
00000a60 75 6c 5f 66 72 61 63 31 36 63 28 63 5b 31 5d 2c |ul_frac16c(c[1],|
00000a70 6d 78 5b 32 5d 5b 31 5d 29 20 2b 20 6d 75 6c 5f |mx[2][1]) + mul_|
00000a80 66 72 61 63 31 36 63 28 63 5b 32 5d 2c 6d 78 5b |frac16c(c[2],mx[|
00000a90 32 5d 5b 32 5d 29 3b 0a 20 20 6d 20 3d 20 64 69 |2][2]);. m = di|
00000aa0 76 5f 66 72 61 63 31 36 28 70 70 64 2a 36 34 30 |v_frac16(ppd*640|
00000ab0 2c 20 6d 75 6c 5f 66 72 61 63 31 36 28 62 5b 32 |, mul_frac16(b[2|
00000ac0 5d 2c 78 73 63 29 29 3b 0a 20 20 78 20 3d 20 28 |],xsc));. x = (|
00000ad0 6d 75 6c 5f 66 72 61 63 31 36 28 2d 6d 2c 62 5b |mul_frac16(-m,b[|
00000ae0 30 5d 29 2b 6f 6e 65 2f 32 29 2f 6f 6e 65 2b 36 |0])+one/2)/one+6|
00000af0 34 30 3b 0a 20 20 79 20 3d 20 28 6d 75 6c 5f 66 |40;. y = (mul_f|
00000b00 72 61 63 31 36 28 6d 2c 62 5b 31 5d 29 2b 6f 6e |rac16(m,b[1])+on|
00000b10 65 2f 32 29 2f 6f 6e 65 2b 35 31 32 3b 0a 20 20 |e/2)/one+512;. |
00000b20 66 6c 61 67 20 3d 20 62 5b 32 5d 3c 6f 6e 65 2f |flag = b[2]<one/|
00000b30 31 36 20 3f 20 31 36 20 3a 20 30 3b 0a 20 20 69 |16 ? 16 : 0;. i|
00000b40 66 20 28 78 3c 30 29 20 66 6c 61 67 7c 3d 31 3b |f (x<0) flag|=1;|
00000b50 0a 20 20 69 66 20 28 78 3e 6d 61 78 73 78 29 20 |. if (x>maxsx) |
00000b60 66 6c 61 67 7c 3d 32 3b 0a 20 20 69 66 20 28 79 |flag|=2;. if (y|
00000b70 3c 30 29 20 66 6c 61 67 7c 3d 34 3b 0a 20 20 69 |<0) flag|=4;. i|
00000b80 66 20 28 79 3e 6d 61 78 73 79 29 20 66 6c 61 67 |f (y>maxsy) flag|
00000b90 7c 3d 38 3b 0a 20 20 2a 73 2b 2b 3d 78 3b 20 2a ||=8;. *s++=x; *|
00000ba0 73 3d 79 3b 20 20 20 20 20 20 0a 20 20 72 65 74 |s=y; . ret|
00000bb0 75 72 6e 20 66 6c 61 67 3b 0a 7d 0a 0a 69 6e 74 |urn flag;.}..int|
00000bc0 20 77 61 76 28 69 6e 74 20 78 2c 20 69 6e 74 20 | wav(int x, int |
00000bd0 79 2c 20 69 6e 74 20 74 29 0a 7b 0a 20 20 69 6e |y, int t).{. in|
00000be0 74 20 72 3d 73 71 72 74 5f 66 72 61 63 31 36 28 |t r=sqrt_frac16(|
00000bf0 6d 75 6c 5f 66 72 61 63 31 36 28 78 2c 78 29 2b |mul_frac16(x,x)+|
00000c00 6d 75 6c 5f 66 72 61 63 31 36 28 79 2c 79 29 29 |mul_frac16(y,y))|
00000c10 2d 74 3b 0a 20 20 72 65 74 75 72 6e 20 6d 75 6c |-t;. return mul|
00000c20 5f 66 72 61 63 31 36 63 28 78 2a 35 2c 20 73 69 |_frac16c(x*5, si|
00000c30 6e 31 36 28 72 2a 33 32 29 2f 38 29 3b 0a 7d 0a |n16(r*32)/8);.}.|
00000c40 0a 69 6e 74 20 6d 61 69 6e 28 76 6f 69 64 29 0a |.int main(void).|
00000c50 7b 0a 20 20 69 6e 74 20 73 5b 32 5d 2c 20 70 5b |{. int s[2], p[|
00000c60 33 5d 3b 0a 20 20 69 6e 74 20 69 2c 20 6a 2c 20 |3];. int i, j, |
00000c70 74 2c 20 64 69 3b 0a 0a 20 20 6d 6f 64 65 20 3d |t, di;.. mode =|
00000c80 20 72 65 61 64 5f 6d 6f 6e 69 74 6f 72 5f 74 79 | read_monitor_ty|
00000c90 70 65 28 29 3d 3d 6d 75 6c 74 69 20 3f 20 31 38 |pe()==multi ? 18|
00000ca0 20 3a 20 30 3b 0a 20 20 61 74 65 78 69 74 28 74 | : 0;. atexit(t|
00000cb0 69 64 79 29 3b 0a 20 20 74 69 64 79 28 29 3b 0a |idy);. tidy();.|
00000cc0 20 20 62 62 63 5f 6d 6f 64 65 28 6d 6f 64 65 2b | bbc_mode(mode+|
00000cd0 31 32 38 29 3b 0a 20 20 62 62 63 5f 6d 6f 64 65 |128);. bbc_mode|
00000ce0 28 6d 6f 64 65 29 3b 0a 20 20 70 72 69 6e 74 66 |(mode);. printf|
00000cf0 28 22 50 6c 65 61 73 65 20 65 6e 74 65 72 20 64 |("Please enter d|
00000d00 6f 74 20 73 65 70 61 72 61 74 69 6f 6e 20 28 73 |ot separation (s|
00000d10 75 67 67 65 73 74 20 31 2d 38 29 20 22 29 3b 0a |uggest 1-8) ");.|
00000d20 20 20 73 63 61 6e 66 28 22 25 69 22 2c 20 26 64 | scanf("%i", &d|
00000d30 69 29 3b 0a 20 20 70 72 65 70 61 72 65 5f 73 63 |i);. prepare_sc|
00000d40 72 65 65 6e 28 29 3b 0a 0a 20 20 65 5b 30 5d 3d |reen();.. e[0]=|
00000d50 64 74 6f 66 70 28 31 2e 32 46 29 3b 0a 20 20 65 |dtofp(1.2F);. e|
00000d60 5b 31 5d 3d 64 74 6f 66 70 28 30 2e 33 46 29 3b |[1]=dtofp(0.3F);|
00000d70 0a 20 20 65 5b 32 5d 3d 64 74 6f 66 70 28 30 2e |. e[2]=dtofp(0.|
00000d80 39 46 29 3b 0a 20 20 64 5b 30 5d 3d 64 74 6f 66 |9F);. d[0]=dtof|
00000d90 70 28 30 2e 30 46 29 3b 0a 20 20 64 5b 31 5d 3d |p(0.0F);. d[1]=|
00000da0 64 74 6f 66 70 28 30 2e 30 31 46 29 3b 0a 20 20 |dtofp(0.01F);. |
00000db0 64 5b 32 5d 3d 64 74 6f 66 70 28 30 2e 31 46 29 |d[2]=dtofp(0.1F)|
00000dc0 3b 0a 0a 20 20 63 61 6c 63 5f 74 72 61 6e 73 28 |;.. calc_trans(|
00000dd0 65 2c 20 64 2c 20 6d 78 29 3b 0a 20 20 0a 20 20 |e, d, mx);. . |
00000de0 66 6f 72 20 28 74 3d 38 2a 6f 6e 65 2f 31 32 38 |for (t=8*one/128|
00000df0 3b 3b 29 20 7b 0a 20 20 20 20 66 6f 72 20 28 3b |;;) {. for (;|
00000e00 20 74 3c 6f 6e 65 2f 38 3b 20 74 2b 3d 6f 6e 65 | t<one/8; t+=one|
00000e10 2f 31 32 38 29 20 7b 0a 20 20 20 20 20 20 62 62 |/128) {. bb|
00000e20 63 5f 63 6c 73 28 29 3b 20 0a 20 20 20 20 20 20 |c_cls(); . |
00000e30 66 6f 72 20 28 69 3d 30 3b 20 69 3c 31 34 30 3b |for (i=0; i<140;|
00000e40 20 69 2b 3d 64 69 29 0a 20 20 20 20 20 20 20 20 | i+=di). |
00000e50 66 6f 72 20 28 6a 3d 30 3b 20 6a 3c 32 31 30 3b |for (j=0; j<210;|
00000e60 20 6a 2b 3d 64 69 29 20 7b 0a 20 20 20 20 20 20 | j+=di) {. |
00000e70 20 20 20 20 70 5b 30 5d 3d 77 61 76 28 28 32 31 | p[0]=wav((21|
00000e80 30 2d 6a 29 2a 6f 6e 65 2f 31 30 32 34 2c 20 28 |0-j)*one/1024, (|
00000e90 69 2d 37 30 29 2a 6f 6e 65 2f 31 30 32 34 2c 20 |i-70)*one/1024, |
00000ea0 74 29 3b 0a 20 20 20 20 20 20 20 20 20 20 70 5b |t);. p[|
00000eb0 31 5d 3d 28 69 2d 37 30 29 2a 6f 6e 65 2f 31 36 |1]=(i-70)*one/16|
00000ec0 30 3b 0a 20 20 20 20 20 20 20 20 20 20 70 5b 32 |0;. p[2|
00000ed0 5d 3d 28 6a 2d 31 30 35 29 2a 6f 6e 65 2f 31 36 |]=(j-105)*one/16|
00000ee0 30 3b 0a 20 20 20 20 20 20 20 20 20 20 70 72 6f |0;. pro|
00000ef0 6a 65 63 74 5f 76 65 72 74 65 78 28 70 2c 20 73 |ject_vertex(p, s|
00000f00 2c 20 6d 78 29 3b 0a 20 20 20 20 20 20 20 20 20 |, mx);. |
00000f10 20 62 62 63 5f 70 6c 6f 74 28 36 39 2c 20 73 5b | bbc_plot(69, s[|
00000f20 30 5d 2c 20 73 5b 31 5d 29 3b 0a 20 20 20 20 20 |0], s[1]);. |
00000f30 20 20 20 7d 0a 20 20 20 20 20 20 6f 73 5f 73 77 | }. os_sw|
00000f40 69 31 28 4f 53 5f 42 79 74 65 2c 20 31 39 29 3b |i1(OS_Byte, 19);|
00000f50 0a 20 20 20 20 20 20 73 77 61 70 5f 62 61 6e 6b |. swap_bank|
00000f60 73 28 29 3b 0a 20 20 20 20 7d 0a 20 20 20 20 74 |s();. }. t|
00000f70 20 3d 20 30 3b 0a 20 20 7d 0a 0a 20 20 72 65 74 | = 0;. }.. ret|
00000f80 75 72 6e 20 30 3b 0a 7d 0a |urn 0;.}.|
00000f89 
.