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vsn2/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: | vsn2/c/main |
| Read OK: | ✔ |
| File size: | 1B3C bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "kernel.h"
#include "bbc.h"
#include "os.h"
#include "flex.h"
#include "wimpt.h"
#include "werr.h"
#include "sprite.h"
#include "ass.h"
#include "swis.h"
#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 struct {
int flags, xres, yres, depth, rate, variables;
} mode_selector;
#define maxsx 640
#define maxsy 480
#define scale 1
int e[3]={dtofp(1.2F),dtofp(1.3F),dtofp(1.6F)};
int d[3]={0,0,0}, lx, ly, lz, vx, vy, vz;
int ambient_light, direct_light;
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=6*one*scale;
int *screen;
sprite_area *flag=0;
int flag_image_offset;
void *screen_start(void) /* returns start address of screen memory, as used by the VDU drivers */
{
int scrst[2] = {148,-1};
os_swi2(OS_ReadVduVariables, (int)scrst, (int)scrst);
return (void *) scrst[0];
}
void press(int i)
{
for (;bbc_inkey(i)!=-1;);
return;
}
void release(int i)
{
for (;bbc_inkey(i)!=0;);
return;
}
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]);
vx = dtofp(-f[0]/s);
vy = dtofp(-f[1]/s);
vz = dtofp(-f[2]/s);
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+maxsx/2;
y = maxsy - ((mul_frac16(m,b[1])+one/2)/one+maxsy/2+16);
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 z, int y, int t)
{
int r=32*(sqrt_frac16(mul_frac16(z,z)+mul_frac16(y,y))-t);
return mul_frac16c(z*5, sin16(r)/8);
}
/*nb if wav is altered, so must surface normal calc in calc_colour*/
unsigned int calc_colour(int z, int y, int t, unsigned int c)
{
int nx, ny, nz;
int rt = sqrt_frac16(mul_frac16(z,z)+mul_frac16(y,y));
int r = 32*(rt-t);
int e1 = mul_frac16c(20*div_frac16(z, rt), cos16(r));
int in=0;
int cr, cg, cb;
nx = one;
ny = - mul_frac16(y, e1)*160/1024;
nz = (mul_frac16(z, e1)+5*sin16(r)/8)*160/1024;
r = sqrt_frac16(mul_frac16(nx,nx)+mul_frac16(ny,ny)+mul_frac16(nz,nz));
nx = div_frac16(nx, r);
ny = div_frac16(ny, r);
nz = div_frac16(nz, r); /*surface normal calculated*/
r = mul_frac16c(nx,vx)+mul_frac16c(ny,vy)+mul_frac16c(nz,vz);
if (r>=0) { /*if surface visible . . .*/
in += ambient_light; /*add in ambient term*/
r = mul_frac16c(nx,lx)+mul_frac16c(ny,ly)+mul_frac16c(nz,lz);
if (r>=0) { /*and if light striking surface . . .*/
in += mul_frac16c(r, direct_light); /*add diffuse term*/
}
}
if (in==0) return 0; /*reflected light intensity calculated*/
cr = c & 255;
cg = (c>>8) & 255;
cb = (c>>16) & 255;
cr = (cr*in)/one;
cg = (cg*in)/one;
cb = (cb*in)/one; /*visible surface colour calculated*/
if (cr<0) cr=0;
if (cg<0) cg=0;
if (cb<0) cb=0;
if (cr>255) cr=255;
if (cg>255) cg=255;
if (cb>255) cb=255;
return cr+(cg<<8)+(cb<<16);
}
void set_mode(int x, int y, int d)
{
mode_selector selector;
selector.flags = 1;
selector.xres = x;
selector.yres = y;
selector.depth = d;
selector.rate = -1;
selector.variables = -1;
os_swi2(OS_ScreenMode, 0, (int)&selector);
}
BOOL load_flag_sprite()
{
os_regset r;
int size;
char filename[]="<Flag$Dir>.flag";
sprite_header *s;
if (flag) flex_free((flex_ptr)&flag);
r.r[0]=5; /*check file size*/
r.r[1]=(int)filename;
if (wimpt_complain(os_swix(OS_File | XOS_Bit, &r))) return FALSE;
size=4+r.r[4];
if (!flex_alloc((flex_ptr)&flag, size)) {
werr(0, "Can't get memory to load flag sprite");
return FALSE;
}
r.r[0]=255; /*load file*/
r.r[2]=(int)(4+(char *)flag);
r.r[3]=0;
if (wimpt_complain(os_swix(OS_File | XOS_Bit, &r))) return FALSE;
flag->size = size;
s = (sprite_header *)((char *)flag+flag->sproff);
flag_image_offset = ((char *)s+s->image) - (char *)flag;
return TRUE;
}
int main(void)
{
int r;
int light_incl, light_bear;
int s[2], p[3];
int i, j, t, di;
int *f;
int z, y;
flex_init();
set_mode(maxsx, maxsy, 5);
screen = screen_start();
if (!load_flag_sprite()) return 0;
f = (int *)((char *)flag + flag_image_offset);
di = one*scale/4;
ambient_light=dtofp(0.0F); direct_light=dtofp(1.5F);
light_incl = (int)(0.55*one);
light_bear = (int)(0.45*one);
r = cos16(light_incl);
lx = mul_frac16c(cos16(light_bear), r);
lz = mul_frac16c(sin16(light_bear),-r);
ly = -sin16(light_incl);
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 (j=210*one-di; j>=0; j-=di)
for (i=140*one-di; i>=0; i-=di) {
z = (210*one-j)/1024;
y = (i-70*one)/1024;
p[0]=wav(z, y, t);
p[1]=(i-70*one)/160;
p[2]=(j-105*one)/160;
if (!project_vertex(p, s, mx)) {
if (screen[s[0]+maxsx*s[1]]==0)
screen[s[0]+maxsx*s[1]] = calc_colour(z, y, t, f[(139-(i>>lone))*210+209-(j>>lone)]);
}
}
if (scale==1) {
press(-99);
release(-99);
}
os_swi1(OS_Byte, 19);
}
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 6b 65 72 6e 65 6c 2e 68 22 0a 23 69 6e |e "kernel.h".#in|
00000050 63 6c 75 64 65 20 22 62 62 63 2e 68 22 0a 23 69 |clude "bbc.h".#i|
00000060 6e 63 6c 75 64 65 20 22 6f 73 2e 68 22 0a 23 69 |nclude "os.h".#i|
00000070 6e 63 6c 75 64 65 20 22 66 6c 65 78 2e 68 22 0a |nclude "flex.h".|
00000080 23 69 6e 63 6c 75 64 65 20 22 77 69 6d 70 74 2e |#include "wimpt.|
00000090 68 22 0a 23 69 6e 63 6c 75 64 65 20 22 77 65 72 |h".#include "wer|
000000a0 72 2e 68 22 0a 23 69 6e 63 6c 75 64 65 20 22 73 |r.h".#include "s|
000000b0 70 72 69 74 65 2e 68 22 0a 0a 23 69 6e 63 6c 75 |prite.h"..#inclu|
000000c0 64 65 20 22 61 73 73 2e 68 22 0a 23 69 6e 63 6c |de "ass.h".#incl|
000000d0 75 64 65 20 22 73 77 69 73 2e 68 22 0a 0a 23 64 |ude "swis.h"..#d|
000000e0 65 66 69 6e 65 20 50 49 20 33 2e 31 34 31 35 39 |efine PI 3.14159|
000000f0 32 36 35 33 36 0a 23 64 65 66 69 6e 65 20 6c 6f |26536.#define lo|
00000100 6e 65 20 31 36 0a 23 64 65 66 69 6e 65 20 6f 6e |ne 16.#define on|
00000110 65 20 28 31 3c 3c 6c 6f 6e 65 29 0a 23 64 65 66 |e (1<<lone).#def|
00000120 69 6e 65 20 66 70 74 6f 64 28 69 29 20 28 20 28 |ine fptod(i) ( (|
00000130 69 6e 74 29 28 30 2e 35 2b 28 69 6e 74 29 28 69 |int)(0.5+(int)(i|
00000140 29 2f 36 2e 35 35 33 36 29 2f 31 30 30 30 30 2e |)/6.5536)/10000.|
00000150 30 20 29 0a 23 64 65 66 69 6e 65 20 64 74 6f 66 |0 ).#define dtof|
00000160 70 28 69 29 20 28 20 28 69 6e 74 29 28 30 2e 35 |p(i) ( (int)(0.5|
00000170 2b 28 64 6f 75 62 6c 65 29 28 69 29 2a 6f 6e 65 |+(double)(i)*one|
00000180 29 20 29 0a 0a 74 79 70 65 64 65 66 20 73 74 72 |) )..typedef str|
00000190 75 63 74 20 7b 0a 20 20 69 6e 74 20 66 6c 61 67 |uct {. int flag|
000001a0 73 2c 20 78 72 65 73 2c 20 79 72 65 73 2c 20 64 |s, xres, yres, d|
000001b0 65 70 74 68 2c 20 72 61 74 65 2c 20 76 61 72 69 |epth, rate, vari|
000001c0 61 62 6c 65 73 3b 0a 7d 20 6d 6f 64 65 5f 73 65 |ables;.} mode_se|
000001d0 6c 65 63 74 6f 72 3b 0a 0a 23 64 65 66 69 6e 65 |lector;..#define|
000001e0 20 6d 61 78 73 78 20 36 34 30 0a 23 64 65 66 69 | maxsx 640.#defi|
000001f0 6e 65 20 6d 61 78 73 79 20 34 38 30 0a 0a 23 64 |ne maxsy 480..#d|
00000200 65 66 69 6e 65 20 73 63 61 6c 65 20 31 0a 0a 69 |efine scale 1..i|
00000210 6e 74 20 65 5b 33 5d 3d 7b 64 74 6f 66 70 28 31 |nt e[3]={dtofp(1|
00000220 2e 32 46 29 2c 64 74 6f 66 70 28 31 2e 33 46 29 |.2F),dtofp(1.3F)|
00000230 2c 64 74 6f 66 70 28 31 2e 36 46 29 7d 3b 0a 69 |,dtofp(1.6F)};.i|
00000240 6e 74 20 64 5b 33 5d 3d 7b 30 2c 30 2c 30 7d 2c |nt d[3]={0,0,0},|
00000250 20 6c 78 2c 20 6c 79 2c 20 6c 7a 2c 20 76 78 2c | lx, ly, lz, vx,|
00000260 20 76 79 2c 20 76 7a 3b 0a 69 6e 74 20 61 6d 62 | vy, vz;.int amb|
00000270 69 65 6e 74 5f 6c 69 67 68 74 2c 20 64 69 72 65 |ient_light, dire|
00000280 63 74 5f 6c 69 67 68 74 3b 0a 64 6f 75 62 6c 65 |ct_light;.double|
00000290 20 74 68 65 74 61 3d 30 2c 20 63 74 68 65 74 61 | theta=0, ctheta|
000002a0 3d 31 2c 20 73 74 68 65 74 61 3d 30 3b 0a 69 6e |=1, stheta=0;.in|
000002b0 74 20 6d 78 5b 33 5d 5b 33 5d 3d 7b 6f 6e 65 2c |t mx[3][3]={one,|
000002c0 30 2c 30 2c 20 30 2c 6f 6e 65 2c 30 2c 20 30 2c |0,0, 0,one,0, 0,|
000002d0 30 2c 6f 6e 65 7d 3b 0a 69 6e 74 20 70 70 64 3d |0,one};.int ppd=|
000002e0 36 2a 6f 6e 65 2c 20 78 73 63 3d 36 2a 6f 6e 65 |6*one, xsc=6*one|
000002f0 2a 73 63 61 6c 65 3b 0a 0a 69 6e 74 20 2a 73 63 |*scale;..int *sc|
00000300 72 65 65 6e 3b 0a 73 70 72 69 74 65 5f 61 72 65 |reen;.sprite_are|
00000310 61 20 2a 66 6c 61 67 3d 30 3b 0a 69 6e 74 20 66 |a *flag=0;.int f|
00000320 6c 61 67 5f 69 6d 61 67 65 5f 6f 66 66 73 65 74 |lag_image_offset|
00000330 3b 0a 0a 76 6f 69 64 20 2a 73 63 72 65 65 6e 5f |;..void *screen_|
00000340 73 74 61 72 74 28 76 6f 69 64 29 20 20 2f 2a 20 |start(void) /* |
00000350 72 65 74 75 72 6e 73 20 73 74 61 72 74 20 61 64 |returns start ad|
00000360 64 72 65 73 73 20 6f 66 20 73 63 72 65 65 6e 20 |dress of screen |
00000370 6d 65 6d 6f 72 79 2c 20 61 73 20 75 73 65 64 20 |memory, as used |
00000380 62 79 20 74 68 65 20 56 44 55 20 64 72 69 76 65 |by the VDU drive|
00000390 72 73 20 2a 2f 0a 7b 0a 20 20 69 6e 74 20 73 63 |rs */.{. int sc|
000003a0 72 73 74 5b 32 5d 20 3d 20 7b 31 34 38 2c 2d 31 |rst[2] = {148,-1|
000003b0 7d 3b 0a 20 20 6f 73 5f 73 77 69 32 28 4f 53 5f |};. os_swi2(OS_|
000003c0 52 65 61 64 56 64 75 56 61 72 69 61 62 6c 65 73 |ReadVduVariables|
000003d0 2c 20 28 69 6e 74 29 73 63 72 73 74 2c 20 28 69 |, (int)scrst, (i|
000003e0 6e 74 29 73 63 72 73 74 29 3b 0a 20 20 72 65 74 |nt)scrst);. ret|
000003f0 75 72 6e 20 28 76 6f 69 64 20 2a 29 20 73 63 72 |urn (void *) scr|
00000400 73 74 5b 30 5d 3b 0a 7d 0a 0a 76 6f 69 64 20 70 |st[0];.}..void p|
00000410 72 65 73 73 28 69 6e 74 20 69 29 0a 7b 0a 20 20 |ress(int i).{. |
00000420 66 6f 72 20 28 3b 62 62 63 5f 69 6e 6b 65 79 28 |for (;bbc_inkey(|
00000430 69 29 21 3d 2d 31 3b 29 3b 0a 20 20 72 65 74 75 |i)!=-1;);. retu|
00000440 72 6e 3b 0a 7d 0a 0a 76 6f 69 64 20 72 65 6c 65 |rn;.}..void rele|
00000450 61 73 65 28 69 6e 74 20 69 29 0a 7b 0a 20 20 66 |ase(int i).{. f|
00000460 6f 72 20 28 3b 62 62 63 5f 69 6e 6b 65 79 28 69 |or (;bbc_inkey(i|
00000470 29 21 3d 30 3b 29 3b 0a 20 20 72 65 74 75 72 6e |)!=0;);. return|
00000480 3b 0a 7d 0a 0a 76 6f 69 64 20 63 61 6c 63 5f 74 |;.}..void calc_t|
00000490 72 61 6e 73 28 69 6e 74 20 2a 65 2c 20 69 6e 74 |rans(int *e, int|
000004a0 20 2a 64 2c 20 69 6e 74 20 6d 78 5b 5d 5b 33 5d | *d, int mx[][3]|
000004b0 29 0a 7b 0a 20 20 64 6f 75 62 6c 65 20 66 5b 33 |).{. double f[3|
000004c0 5d 2c 20 6d 5b 32 5d 5b 33 5d 3b 0a 20 20 64 6f |], m[2][3];. do|
000004d0 75 62 6c 65 20 72 32 2c 20 72 2c 20 73 3b 0a 20 |uble r2, r, s;. |
000004e0 20 64 6f 75 62 6c 65 20 61 3d 73 74 68 65 74 61 | double a=stheta|
000004f0 2c 20 62 3d 63 74 68 65 74 61 3b 0a 20 20 66 5b |, b=ctheta;. f[|
00000500 30 5d 3d 66 70 74 6f 64 28 64 5b 30 5d 2d 65 5b |0]=fptod(d[0]-e[|
00000510 30 5d 29 3b 09 66 5b 31 5d 3d 66 70 74 6f 64 28 |0]);.f[1]=fptod(|
00000520 64 5b 31 5d 2d 65 5b 31 5d 29 3b 09 66 5b 32 5d |d[1]-e[1]);.f[2]|
00000530 3d 66 70 74 6f 64 28 64 5b 32 5d 2d 65 5b 32 5d |=fptod(d[2]-e[2]|
00000540 29 3b 0a 20 20 72 32 3d 66 5b 30 5d 2a 66 5b 30 |);. r2=f[0]*f[0|
00000550 5d 2b 66 5b 32 5d 2a 66 5b 32 5d 3b 09 72 3d 73 |]+f[2]*f[2];.r=s|
00000560 71 72 74 28 72 32 29 3b 09 09 73 3d 73 71 72 74 |qrt(r2);..s=sqrt|
00000570 28 72 32 2b 66 5b 31 5d 2a 66 5b 31 5d 29 3b 0a |(r2+f[1]*f[1]);.|
00000580 20 20 76 78 20 3d 20 64 74 6f 66 70 28 2d 66 5b | vx = dtofp(-f[|
00000590 30 5d 2f 73 29 3b 0a 20 20 76 79 20 3d 20 64 74 |0]/s);. vy = dt|
000005a0 6f 66 70 28 2d 66 5b 31 5d 2f 73 29 3b 0a 20 20 |ofp(-f[1]/s);. |
000005b0 76 7a 20 3d 20 64 74 6f 66 70 28 2d 66 5b 32 5d |vz = dtofp(-f[2]|
000005c0 2f 73 29 3b 0a 20 20 69 66 20 28 21 73 29 20 7b |/s);. if (!s) {|
000005d0 0a 20 20 20 20 6d 78 5b 30 5d 5b 30 5d 3d 64 74 |. mx[0][0]=dt|
000005e0 6f 66 70 28 62 29 3b 09 09 09 09 6d 78 5b 30 5d |ofp(b);....mx[0]|
000005f0 5b 31 5d 3d 64 74 6f 66 70 28 2d 61 29 3b 09 09 |[1]=dtofp(-a);..|
00000600 09 6d 78 5b 30 5d 5b 32 5d 3d 30 3b 0a 20 20 20 |.mx[0][2]=0;. |
00000610 20 6d 78 5b 31 5d 5b 30 5d 3d 64 74 6f 66 70 28 | mx[1][0]=dtofp(|
00000620 61 29 3b 09 09 09 09 6d 78 5b 31 5d 5b 31 5d 3d |a);....mx[1][1]=|
00000630 64 74 6f 66 70 28 62 29 3b 09 09 09 6d 78 5b 31 |dtofp(b);...mx[1|
00000640 5d 5b 32 5d 3d 30 3b 0a 20 20 20 20 6d 78 5b 32 |][2]=0;. mx[2|
00000650 5d 5b 30 5d 3d 30 3b 09 09 09 09 09 6d 78 5b 32 |][0]=0;.....mx[2|
00000660 5d 5b 31 5d 3d 30 3b 09 09 09 09 6d 78 5b 32 5d |][1]=0;....mx[2]|
00000670 5b 32 5d 3d 6f 6e 65 3b 0a 20 20 7d 0a 20 20 65 |[2]=one;. }. e|
00000680 6c 73 65 0a 20 20 20 20 69 66 20 28 21 72 29 20 |lse. if (!r) |
00000690 7b 0a 20 20 20 20 20 20 73 3d 31 2f 73 3b 0a 20 |{. s=1/s;. |
000006a0 20 20 20 20 20 6d 78 5b 30 5d 5b 30 5d 3d 64 74 | mx[0][0]=dt|
000006b0 6f 66 70 28 62 29 3b 09 09 09 6d 78 5b 30 5d 5b |ofp(b);...mx[0][|
000006c0 31 5d 3d 64 74 6f 66 70 28 2d 61 2a 72 2a 73 29 |1]=dtofp(-a*r*s)|
000006d0 3b 09 09 09 6d 78 5b 30 5d 5b 32 5d 3d 64 74 6f |;...mx[0][2]=dto|
000006e0 66 70 28 61 2a 66 5b 31 5d 2a 73 29 3b 0a 20 20 |fp(a*f[1]*s);. |
000006f0 20 20 20 20 6d 78 5b 31 5d 5b 30 5d 3d 64 74 6f | mx[1][0]=dto|
00000700 66 70 28 61 29 3b 09 09 09 6d 78 5b 31 5d 5b 31 |fp(a);...mx[1][1|
00000710 5d 3d 64 74 6f 66 70 28 62 2a 72 2a 73 29 3b 09 |]=dtofp(b*r*s);.|
00000720 09 09 6d 78 5b 31 5d 5b 32 5d 3d 64 74 6f 66 70 |..mx[1][2]=dtofp|
00000730 28 2d 62 2a 66 5b 31 5d 2a 73 29 3b 0a 20 20 20 |(-b*f[1]*s);. |
00000740 20 20 20 6d 78 5b 32 5d 5b 30 5d 3d 30 3b 09 09 | mx[2][0]=0;..|
00000750 09 09 6d 78 5b 32 5d 5b 31 5d 3d 64 74 6f 66 70 |..mx[2][1]=dtofp|
00000760 28 66 5b 31 5d 2a 73 29 3b 09 09 09 6d 78 5b 32 |(f[1]*s);...mx[2|
00000770 5d 5b 32 5d 3d 64 74 6f 66 70 28 72 2a 73 29 3b |][2]=dtofp(r*s);|
00000780 0a 20 20 20 20 7d 0a 20 20 20 20 65 6c 73 65 20 |. }. else |
00000790 7b 0a 20 20 20 20 20 20 73 3d 31 2f 73 3b 20 72 |{. s=1/s; r|
000007a0 32 3d 31 2f 72 3b 0a 20 20 20 20 20 20 6d 5b 30 |2=1/r;. m[0|
000007b0 5d 5b 30 5d 3d 72 32 2a 66 5b 32 5d 3b 09 09 6d |][0]=r2*f[2];..m|
000007c0 5b 30 5d 5b 31 5d 3d 30 3b 09 6d 5b 30 5d 5b 32 |[0][1]=0;.m[0][2|
000007d0 5d 3d 2d 72 32 2a 66 5b 30 5d 3b 0a 20 20 20 20 |]=-r2*f[0];. |
000007e0 20 20 6d 5b 31 5d 5b 30 5d 3d 2d 72 32 2a 73 2a | m[1][0]=-r2*s*|
000007f0 66 5b 30 5d 2a 66 5b 31 5d 3b 09 6d 5b 31 5d 5b |f[0]*f[1];.m[1][|
00000800 31 5d 3d 73 2a 72 3b 09 6d 5b 31 5d 5b 32 5d 3d |1]=s*r;.m[1][2]=|
00000810 2d 72 32 2a 73 2a 66 5b 31 5d 2a 66 5b 32 5d 3b |-r2*s*f[1]*f[2];|
00000820 0a 20 20 20 20 20 20 6d 78 5b 32 5d 5b 30 5d 3d |. mx[2][0]=|
00000830 64 74 6f 66 70 28 73 2a 66 5b 30 5d 29 3b 09 09 |dtofp(s*f[0]);..|
00000840 09 6d 78 5b 32 5d 5b 31 5d 3d 64 74 6f 66 70 28 |.mx[2][1]=dtofp(|
00000850 73 2a 66 5b 31 5d 29 3b 09 09 09 6d 78 5b 32 5d |s*f[1]);...mx[2]|
00000860 5b 32 5d 3d 64 74 6f 66 70 28 73 2a 66 5b 32 5d |[2]=dtofp(s*f[2]|
00000870 29 3b 0a 20 20 20 20 20 20 6d 78 5b 30 5d 5b 30 |);. mx[0][0|
00000880 5d 3d 64 74 6f 66 70 28 62 2a 6d 5b 30 5d 5b 30 |]=dtofp(b*m[0][0|
00000890 5d 2d 61 2a 6d 5b 31 5d 5b 30 5d 29 3b 09 6d 78 |]-a*m[1][0]);.mx|
000008a0 5b 30 5d 5b 31 5d 3d 64 74 6f 66 70 28 62 2a 6d |[0][1]=dtofp(b*m|
000008b0 5b 30 5d 5b 31 5d 2d 61 2a 6d 5b 31 5d 5b 31 5d |[0][1]-a*m[1][1]|
000008c0 29 3b 09 6d 78 5b 30 5d 5b 32 5d 3d 64 74 6f 66 |);.mx[0][2]=dtof|
000008d0 70 28 62 2a 6d 5b 30 5d 5b 32 5d 2d 61 2a 6d 5b |p(b*m[0][2]-a*m[|
000008e0 31 5d 5b 32 5d 29 3b 0a 20 20 20 20 20 20 6d 78 |1][2]);. mx|
000008f0 5b 31 5d 5b 30 5d 3d 64 74 6f 66 70 28 61 2a 6d |[1][0]=dtofp(a*m|
00000900 5b 30 5d 5b 30 5d 2b 62 2a 6d 5b 31 5d 5b 30 5d |[0][0]+b*m[1][0]|
00000910 29 3b 09 6d 78 5b 31 5d 5b 31 5d 3d 64 74 6f 66 |);.mx[1][1]=dtof|
00000920 70 28 61 2a 6d 5b 30 5d 5b 31 5d 2b 62 2a 6d 5b |p(a*m[0][1]+b*m[|
00000930 31 5d 5b 31 5d 29 3b 09 6d 78 5b 31 5d 5b 32 5d |1][1]);.mx[1][2]|
00000940 3d 64 74 6f 66 70 28 61 2a 6d 5b 30 5d 5b 32 5d |=dtofp(a*m[0][2]|
00000950 2b 62 2a 6d 5b 31 5d 5b 32 5d 29 3b 0a 20 20 20 |+b*m[1][2]);. |
00000960 20 7d 0a 7d 0a 0a 69 6e 74 20 70 72 6f 6a 65 63 | }.}..int projec|
00000970 74 5f 76 65 72 74 65 78 28 69 6e 74 20 2a 76 2c |t_vertex(int *v,|
00000980 20 69 6e 74 20 2a 73 2c 20 69 6e 74 20 6d 78 5b | int *s, int mx[|
00000990 5d 5b 33 5d 29 0a 7b 0a 20 20 69 6e 74 20 63 5b |][3]).{. int c[|
000009a0 33 5d 3b 0a 20 20 69 6e 74 20 62 5b 33 5d 2c 20 |3];. int b[3], |
000009b0 6d 3b 0a 20 20 69 6e 74 20 78 2c 20 79 2c 20 66 |m;. int x, y, f|
000009c0 6c 61 67 3b 0a 20 20 63 5b 30 5d 20 3d 20 2a 76 |lag;. c[0] = *v|
000009d0 2b 2b 2d 65 5b 30 5d 3b 20 63 5b 31 5d 20 3d 20 |++-e[0]; c[1] = |
000009e0 2a 76 2b 2b 2d 65 5b 31 5d 3b 20 63 5b 32 5d 20 |*v++-e[1]; c[2] |
000009f0 3d 20 2a 76 2d 65 5b 32 5d 3b 0a 20 20 62 5b 30 |= *v-e[2];. b[0|
00000a00 5d 20 3d 20 6d 75 6c 5f 66 72 61 63 31 36 63 28 |] = mul_frac16c(|
00000a10 63 5b 30 5d 2c 6d 78 5b 30 5d 5b 30 5d 29 20 2b |c[0],mx[0][0]) +|
00000a20 20 6d 75 6c 5f 66 72 61 63 31 36 63 28 63 5b 31 | mul_frac16c(c[1|
00000a30 5d 2c 6d 78 5b 30 5d 5b 31 5d 29 20 2b 20 6d 75 |],mx[0][1]) + mu|
00000a40 6c 5f 66 72 61 63 31 36 63 28 63 5b 32 5d 2c 6d |l_frac16c(c[2],m|
00000a50 78 5b 30 5d 5b 32 5d 29 3b 0a 20 20 62 5b 31 5d |x[0][2]);. b[1]|
00000a60 20 3d 20 6d 75 6c 5f 66 72 61 63 31 36 63 28 63 | = mul_frac16c(c|
00000a70 5b 30 5d 2c 6d 78 5b 31 5d 5b 30 5d 29 20 2b 20 |[0],mx[1][0]) + |
00000a80 6d 75 6c 5f 66 72 61 63 31 36 63 28 63 5b 31 5d |mul_frac16c(c[1]|
00000a90 2c 6d 78 5b 31 5d 5b 31 5d 29 20 2b 20 6d 75 6c |,mx[1][1]) + mul|
00000aa0 5f 66 72 61 63 31 36 63 28 63 5b 32 5d 2c 6d 78 |_frac16c(c[2],mx|
00000ab0 5b 31 5d 5b 32 5d 29 3b 0a 20 20 62 5b 32 5d 20 |[1][2]);. b[2] |
00000ac0 3d 20 6d 75 6c 5f 66 72 61 63 31 36 63 28 63 5b |= mul_frac16c(c[|
00000ad0 30 5d 2c 6d 78 5b 32 5d 5b 30 5d 29 20 2b 20 6d |0],mx[2][0]) + m|
00000ae0 75 6c 5f 66 72 61 63 31 36 63 28 63 5b 31 5d 2c |ul_frac16c(c[1],|
00000af0 6d 78 5b 32 5d 5b 31 5d 29 20 2b 20 6d 75 6c 5f |mx[2][1]) + mul_|
00000b00 66 72 61 63 31 36 63 28 63 5b 32 5d 2c 6d 78 5b |frac16c(c[2],mx[|
00000b10 32 5d 5b 32 5d 29 3b 0a 20 20 6d 20 3d 20 64 69 |2][2]);. m = di|
00000b20 76 5f 66 72 61 63 31 36 28 70 70 64 2a 36 34 30 |v_frac16(ppd*640|
00000b30 2c 20 6d 75 6c 5f 66 72 61 63 31 36 28 62 5b 32 |, mul_frac16(b[2|
00000b40 5d 2c 78 73 63 29 29 3b 0a 20 20 78 20 3d 20 28 |],xsc));. x = (|
00000b50 6d 75 6c 5f 66 72 61 63 31 36 28 2d 6d 2c 62 5b |mul_frac16(-m,b[|
00000b60 30 5d 29 2b 6f 6e 65 2f 32 29 2f 6f 6e 65 2b 6d |0])+one/2)/one+m|
00000b70 61 78 73 78 2f 32 3b 0a 20 20 79 20 3d 20 6d 61 |axsx/2;. y = ma|
00000b80 78 73 79 20 2d 20 28 28 6d 75 6c 5f 66 72 61 63 |xsy - ((mul_frac|
00000b90 31 36 28 6d 2c 62 5b 31 5d 29 2b 6f 6e 65 2f 32 |16(m,b[1])+one/2|
00000ba0 29 2f 6f 6e 65 2b 6d 61 78 73 79 2f 32 2b 31 36 |)/one+maxsy/2+16|
00000bb0 29 3b 0a 20 20 66 6c 61 67 20 3d 20 62 5b 32 5d |);. flag = b[2]|
00000bc0 3c 6f 6e 65 2f 31 36 20 3f 20 31 36 20 3a 20 30 |<one/16 ? 16 : 0|
00000bd0 3b 0a 20 20 69 66 20 28 78 3c 30 29 20 66 6c 61 |;. if (x<0) fla|
00000be0 67 7c 3d 31 3b 0a 20 20 69 66 20 28 78 3e 3d 6d |g|=1;. if (x>=m|
00000bf0 61 78 73 78 29 20 66 6c 61 67 7c 3d 32 3b 0a 20 |axsx) flag|=2;. |
00000c00 20 69 66 20 28 79 3c 30 29 20 66 6c 61 67 7c 3d | if (y<0) flag|=|
00000c10 34 3b 0a 20 20 69 66 20 28 79 3e 3d 6d 61 78 73 |4;. if (y>=maxs|
00000c20 79 29 20 66 6c 61 67 7c 3d 38 3b 0a 20 20 2a 73 |y) flag|=8;. *s|
00000c30 2b 2b 3d 78 3b 20 2a 73 3d 79 3b 20 20 20 20 20 |++=x; *s=y; |
00000c40 20 0a 20 20 72 65 74 75 72 6e 20 66 6c 61 67 3b | . return flag;|
00000c50 0a 7d 0a 0a 69 6e 74 20 77 61 76 28 69 6e 74 20 |.}..int wav(int |
00000c60 7a 2c 20 69 6e 74 20 79 2c 20 69 6e 74 20 74 29 |z, int y, int t)|
00000c70 0a 7b 0a 20 20 69 6e 74 20 72 3d 33 32 2a 28 73 |.{. int r=32*(s|
00000c80 71 72 74 5f 66 72 61 63 31 36 28 6d 75 6c 5f 66 |qrt_frac16(mul_f|
00000c90 72 61 63 31 36 28 7a 2c 7a 29 2b 6d 75 6c 5f 66 |rac16(z,z)+mul_f|
00000ca0 72 61 63 31 36 28 79 2c 79 29 29 2d 74 29 3b 0a |rac16(y,y))-t);.|
00000cb0 20 20 72 65 74 75 72 6e 20 6d 75 6c 5f 66 72 61 | return mul_fra|
00000cc0 63 31 36 63 28 7a 2a 35 2c 20 73 69 6e 31 36 28 |c16c(z*5, sin16(|
00000cd0 72 29 2f 38 29 3b 0a 7d 0a 0a 2f 2a 6e 62 20 69 |r)/8);.}../*nb i|
00000ce0 66 20 77 61 76 20 69 73 20 61 6c 74 65 72 65 64 |f wav is altered|
00000cf0 2c 20 73 6f 20 6d 75 73 74 20 73 75 72 66 61 63 |, so must surfac|
00000d00 65 20 6e 6f 72 6d 61 6c 20 63 61 6c 63 20 69 6e |e normal calc in|
00000d10 20 63 61 6c 63 5f 63 6f 6c 6f 75 72 2a 2f 0a 75 | calc_colour*/.u|
00000d20 6e 73 69 67 6e 65 64 20 69 6e 74 20 63 61 6c 63 |nsigned int calc|
00000d30 5f 63 6f 6c 6f 75 72 28 69 6e 74 20 7a 2c 20 69 |_colour(int z, i|
00000d40 6e 74 20 79 2c 20 69 6e 74 20 74 2c 20 75 6e 73 |nt y, int t, uns|
00000d50 69 67 6e 65 64 20 69 6e 74 20 63 29 0a 7b 0a 20 |igned int c).{. |
00000d60 20 69 6e 74 20 6e 78 2c 20 6e 79 2c 20 6e 7a 3b | int nx, ny, nz;|
00000d70 0a 20 20 69 6e 74 20 72 74 20 3d 20 73 71 72 74 |. int rt = sqrt|
00000d80 5f 66 72 61 63 31 36 28 6d 75 6c 5f 66 72 61 63 |_frac16(mul_frac|
00000d90 31 36 28 7a 2c 7a 29 2b 6d 75 6c 5f 66 72 61 63 |16(z,z)+mul_frac|
00000da0 31 36 28 79 2c 79 29 29 3b 0a 20 20 69 6e 74 20 |16(y,y));. int |
00000db0 72 20 20 3d 20 33 32 2a 28 72 74 2d 74 29 3b 0a |r = 32*(rt-t);.|
00000dc0 20 20 69 6e 74 20 65 31 20 3d 20 6d 75 6c 5f 66 | int e1 = mul_f|
00000dd0 72 61 63 31 36 63 28 32 30 2a 64 69 76 5f 66 72 |rac16c(20*div_fr|
00000de0 61 63 31 36 28 7a 2c 20 72 74 29 2c 20 63 6f 73 |ac16(z, rt), cos|
00000df0 31 36 28 72 29 29 3b 0a 20 20 69 6e 74 20 69 6e |16(r));. int in|
00000e00 3d 30 3b 0a 20 20 69 6e 74 20 63 72 2c 20 63 67 |=0;. int cr, cg|
00000e10 2c 20 63 62 3b 0a 20 20 0a 20 20 6e 78 20 3d 20 |, cb;. . nx = |
00000e20 6f 6e 65 3b 0a 20 20 6e 79 20 3d 20 2d 20 6d 75 |one;. ny = - mu|
00000e30 6c 5f 66 72 61 63 31 36 28 79 2c 20 65 31 29 2a |l_frac16(y, e1)*|
00000e40 31 36 30 2f 31 30 32 34 3b 0a 20 20 6e 7a 20 3d |160/1024;. nz =|
00000e50 20 20 28 6d 75 6c 5f 66 72 61 63 31 36 28 7a 2c | (mul_frac16(z,|
00000e60 20 65 31 29 2b 35 2a 73 69 6e 31 36 28 72 29 2f | e1)+5*sin16(r)/|
00000e70 38 29 2a 31 36 30 2f 31 30 32 34 3b 0a 20 20 72 |8)*160/1024;. r|
00000e80 20 20 3d 20 73 71 72 74 5f 66 72 61 63 31 36 28 | = sqrt_frac16(|
00000e90 6d 75 6c 5f 66 72 61 63 31 36 28 6e 78 2c 6e 78 |mul_frac16(nx,nx|
00000ea0 29 2b 6d 75 6c 5f 66 72 61 63 31 36 28 6e 79 2c |)+mul_frac16(ny,|
00000eb0 6e 79 29 2b 6d 75 6c 5f 66 72 61 63 31 36 28 6e |ny)+mul_frac16(n|
00000ec0 7a 2c 6e 7a 29 29 3b 0a 20 20 6e 78 20 3d 20 64 |z,nz));. nx = d|
00000ed0 69 76 5f 66 72 61 63 31 36 28 6e 78 2c 20 72 29 |iv_frac16(nx, r)|
00000ee0 3b 0a 20 20 6e 79 20 3d 20 64 69 76 5f 66 72 61 |;. ny = div_fra|
00000ef0 63 31 36 28 6e 79 2c 20 72 29 3b 0a 20 20 6e 7a |c16(ny, r);. nz|
00000f00 20 3d 20 64 69 76 5f 66 72 61 63 31 36 28 6e 7a | = div_frac16(nz|
00000f10 2c 20 72 29 3b 09 09 09 09 2f 2a 73 75 72 66 61 |, r);..../*surfa|
00000f20 63 65 20 6e 6f 72 6d 61 6c 20 63 61 6c 63 75 6c |ce normal calcul|
00000f30 61 74 65 64 2a 2f 0a 0a 20 20 72 20 20 3d 20 6d |ated*/.. r = m|
00000f40 75 6c 5f 66 72 61 63 31 36 63 28 6e 78 2c 76 78 |ul_frac16c(nx,vx|
00000f50 29 2b 6d 75 6c 5f 66 72 61 63 31 36 63 28 6e 79 |)+mul_frac16c(ny|
00000f60 2c 76 79 29 2b 6d 75 6c 5f 66 72 61 63 31 36 63 |,vy)+mul_frac16c|
00000f70 28 6e 7a 2c 76 7a 29 3b 0a 20 20 69 66 20 28 72 |(nz,vz);. if (r|
00000f80 3e 3d 30 29 20 7b 09 09 09 09 09 09 2f 2a 69 66 |>=0) {....../*if|
00000f90 20 73 75 72 66 61 63 65 20 76 69 73 69 62 6c 65 | surface visible|
00000fa0 20 2e 20 2e 20 2e 2a 2f 0a 20 20 20 20 69 6e 20 | . . .*/. in |
00000fb0 2b 3d 20 61 6d 62 69 65 6e 74 5f 6c 69 67 68 74 |+= ambient_light|
00000fc0 3b 09 09 09 09 2f 2a 61 64 64 20 69 6e 20 61 6d |;..../*add in am|
00000fd0 62 69 65 6e 74 20 74 65 72 6d 2a 2f 0a 20 20 20 |bient term*/. |
00000fe0 20 72 20 3d 20 6d 75 6c 5f 66 72 61 63 31 36 63 | r = mul_frac16c|
00000ff0 28 6e 78 2c 6c 78 29 2b 6d 75 6c 5f 66 72 61 63 |(nx,lx)+mul_frac|
00001000 31 36 63 28 6e 79 2c 6c 79 29 2b 6d 75 6c 5f 66 |16c(ny,ly)+mul_f|
00001010 72 61 63 31 36 63 28 6e 7a 2c 6c 7a 29 3b 0a 20 |rac16c(nz,lz);. |
00001020 20 20 20 69 66 20 28 72 3e 3d 30 29 20 7b 09 09 | if (r>=0) {..|
00001030 09 09 09 09 2f 2a 61 6e 64 20 69 66 20 6c 69 67 |..../*and if lig|
00001040 68 74 20 73 74 72 69 6b 69 6e 67 20 73 75 72 66 |ht striking surf|
00001050 61 63 65 20 2e 20 2e 20 2e 2a 2f 0a 20 20 20 20 |ace . . .*/. |
00001060 20 20 69 6e 20 2b 3d 20 6d 75 6c 5f 66 72 61 63 | in += mul_frac|
00001070 31 36 63 28 72 2c 20 64 69 72 65 63 74 5f 6c 69 |16c(r, direct_li|
00001080 67 68 74 29 3b 09 09 2f 2a 61 64 64 20 64 69 66 |ght);../*add dif|
00001090 66 75 73 65 20 74 65 72 6d 2a 2f 0a 20 20 20 20 |fuse term*/. |
000010a0 7d 0a 20 20 7d 0a 20 20 69 66 20 28 69 6e 3d 3d |}. }. if (in==|
000010b0 30 29 20 72 65 74 75 72 6e 20 30 3b 09 09 09 09 |0) return 0;....|
000010c0 09 09 09 2f 2a 72 65 66 6c 65 63 74 65 64 20 6c |.../*reflected l|
000010d0 69 67 68 74 20 69 6e 74 65 6e 73 69 74 79 20 63 |ight intensity c|
000010e0 61 6c 63 75 6c 61 74 65 64 2a 2f 0a 0a 20 20 63 |alculated*/.. c|
000010f0 72 20 3d 20 63 20 26 20 32 35 35 3b 0a 20 20 63 |r = c & 255;. c|
00001100 67 20 3d 20 28 63 3e 3e 38 29 20 26 20 32 35 35 |g = (c>>8) & 255|
00001110 3b 0a 20 20 63 62 20 3d 20 28 63 3e 3e 31 36 29 |;. cb = (c>>16)|
00001120 20 26 20 32 35 35 3b 0a 20 20 63 72 20 3d 20 28 | & 255;. cr = (|
00001130 63 72 2a 69 6e 29 2f 6f 6e 65 3b 0a 20 20 63 67 |cr*in)/one;. cg|
00001140 20 3d 20 28 63 67 2a 69 6e 29 2f 6f 6e 65 3b 0a | = (cg*in)/one;.|
00001150 20 20 63 62 20 3d 20 28 63 62 2a 69 6e 29 2f 6f | cb = (cb*in)/o|
00001160 6e 65 3b 09 09 09 09 09 2f 2a 76 69 73 69 62 6c |ne;...../*visibl|
00001170 65 20 73 75 72 66 61 63 65 20 63 6f 6c 6f 75 72 |e surface colour|
00001180 20 63 61 6c 63 75 6c 61 74 65 64 2a 2f 0a 20 20 | calculated*/. |
00001190 69 66 20 28 63 72 3c 30 29 20 63 72 3d 30 3b 0a |if (cr<0) cr=0;.|
000011a0 20 20 69 66 20 28 63 67 3c 30 29 20 63 67 3d 30 | if (cg<0) cg=0|
000011b0 3b 0a 20 20 69 66 20 28 63 62 3c 30 29 20 63 62 |;. if (cb<0) cb|
000011c0 3d 30 3b 0a 20 20 69 66 20 28 63 72 3e 32 35 35 |=0;. if (cr>255|
000011d0 29 20 63 72 3d 32 35 35 3b 0a 20 20 69 66 20 28 |) cr=255;. if (|
000011e0 63 67 3e 32 35 35 29 20 63 67 3d 32 35 35 3b 0a |cg>255) cg=255;.|
000011f0 20 20 69 66 20 28 63 62 3e 32 35 35 29 20 63 62 | if (cb>255) cb|
00001200 3d 32 35 35 3b 0a 0a 20 20 72 65 74 75 72 6e 20 |=255;.. return |
00001210 63 72 2b 28 63 67 3c 3c 38 29 2b 28 63 62 3c 3c |cr+(cg<<8)+(cb<<|
00001220 31 36 29 3b 0a 7d 0a 0a 76 6f 69 64 20 73 65 74 |16);.}..void set|
00001230 5f 6d 6f 64 65 28 69 6e 74 20 78 2c 20 69 6e 74 |_mode(int x, int|
00001240 20 79 2c 20 69 6e 74 20 64 29 0a 7b 0a 20 20 6d | y, int d).{. m|
00001250 6f 64 65 5f 73 65 6c 65 63 74 6f 72 20 73 65 6c |ode_selector sel|
00001260 65 63 74 6f 72 3b 0a 20 20 73 65 6c 65 63 74 6f |ector;. selecto|
00001270 72 2e 66 6c 61 67 73 20 3d 20 31 3b 0a 20 20 73 |r.flags = 1;. s|
00001280 65 6c 65 63 74 6f 72 2e 78 72 65 73 20 3d 20 78 |elector.xres = x|
00001290 3b 0a 20 20 73 65 6c 65 63 74 6f 72 2e 79 72 65 |;. selector.yre|
000012a0 73 20 3d 20 79 3b 0a 20 20 73 65 6c 65 63 74 6f |s = y;. selecto|
000012b0 72 2e 64 65 70 74 68 20 3d 20 64 3b 0a 20 20 73 |r.depth = d;. s|
000012c0 65 6c 65 63 74 6f 72 2e 72 61 74 65 20 3d 20 2d |elector.rate = -|
000012d0 31 3b 0a 20 20 73 65 6c 65 63 74 6f 72 2e 76 61 |1;. selector.va|
000012e0 72 69 61 62 6c 65 73 20 3d 20 2d 31 3b 0a 20 20 |riables = -1;. |
000012f0 6f 73 5f 73 77 69 32 28 4f 53 5f 53 63 72 65 65 |os_swi2(OS_Scree|
00001300 6e 4d 6f 64 65 2c 20 30 2c 20 28 69 6e 74 29 26 |nMode, 0, (int)&|
00001310 73 65 6c 65 63 74 6f 72 29 3b 0a 7d 0a 0a 42 4f |selector);.}..BO|
00001320 4f 4c 20 6c 6f 61 64 5f 66 6c 61 67 5f 73 70 72 |OL load_flag_spr|
00001330 69 74 65 28 29 0a 7b 0a 20 20 6f 73 5f 72 65 67 |ite().{. os_reg|
00001340 73 65 74 20 72 3b 0a 20 20 69 6e 74 20 73 69 7a |set r;. int siz|
00001350 65 3b 0a 20 20 63 68 61 72 20 66 69 6c 65 6e 61 |e;. char filena|
00001360 6d 65 5b 5d 3d 22 3c 46 6c 61 67 24 44 69 72 3e |me[]="<Flag$Dir>|
00001370 2e 66 6c 61 67 22 3b 0a 20 20 73 70 72 69 74 65 |.flag";. sprite|
00001380 5f 68 65 61 64 65 72 20 2a 73 3b 0a 20 20 69 66 |_header *s;. if|
00001390 20 28 66 6c 61 67 29 20 66 6c 65 78 5f 66 72 65 | (flag) flex_fre|
000013a0 65 28 28 66 6c 65 78 5f 70 74 72 29 26 66 6c 61 |e((flex_ptr)&fla|
000013b0 67 29 3b 0a 20 20 72 2e 72 5b 30 5d 3d 35 3b 20 |g);. r.r[0]=5; |
000013c0 20 20 20 20 20 20 20 20 20 20 20 20 20 2f 2a 63 | /*c|
000013d0 68 65 63 6b 20 66 69 6c 65 20 73 69 7a 65 2a 2f |heck file size*/|
000013e0 0a 20 20 72 2e 72 5b 31 5d 3d 28 69 6e 74 29 66 |. r.r[1]=(int)f|
000013f0 69 6c 65 6e 61 6d 65 3b 0a 20 20 69 66 20 28 77 |ilename;. if (w|
00001400 69 6d 70 74 5f 63 6f 6d 70 6c 61 69 6e 28 6f 73 |impt_complain(os|
00001410 5f 73 77 69 78 28 4f 53 5f 46 69 6c 65 20 7c 20 |_swix(OS_File | |
00001420 58 4f 53 5f 42 69 74 2c 20 26 72 29 29 29 20 72 |XOS_Bit, &r))) r|
00001430 65 74 75 72 6e 20 46 41 4c 53 45 3b 0a 20 20 73 |eturn FALSE;. s|
00001440 69 7a 65 3d 34 2b 72 2e 72 5b 34 5d 3b 0a 20 20 |ize=4+r.r[4];. |
00001450 69 66 20 28 21 66 6c 65 78 5f 61 6c 6c 6f 63 28 |if (!flex_alloc(|
00001460 28 66 6c 65 78 5f 70 74 72 29 26 66 6c 61 67 2c |(flex_ptr)&flag,|
00001470 20 73 69 7a 65 29 29 20 7b 0a 20 20 20 20 77 65 | size)) {. we|
00001480 72 72 28 30 2c 20 22 43 61 6e 27 74 20 67 65 74 |rr(0, "Can't get|
00001490 20 6d 65 6d 6f 72 79 20 74 6f 20 6c 6f 61 64 20 | memory to load |
000014a0 66 6c 61 67 20 73 70 72 69 74 65 22 29 3b 0a 20 |flag sprite");. |
000014b0 20 20 20 72 65 74 75 72 6e 20 46 41 4c 53 45 3b | return FALSE;|
000014c0 0a 20 20 7d 0a 20 20 72 2e 72 5b 30 5d 3d 32 35 |. }. r.r[0]=25|
000014d0 35 3b 20 20 20 20 20 20 20 20 20 20 20 20 2f 2a |5; /*|
000014e0 6c 6f 61 64 20 66 69 6c 65 2a 2f 0a 20 20 72 2e |load file*/. r.|
000014f0 72 5b 32 5d 3d 28 69 6e 74 29 28 34 2b 28 63 68 |r[2]=(int)(4+(ch|
00001500 61 72 20 2a 29 66 6c 61 67 29 3b 0a 20 20 72 2e |ar *)flag);. r.|
00001510 72 5b 33 5d 3d 30 3b 0a 20 20 69 66 20 28 77 69 |r[3]=0;. if (wi|
00001520 6d 70 74 5f 63 6f 6d 70 6c 61 69 6e 28 6f 73 5f |mpt_complain(os_|
00001530 73 77 69 78 28 4f 53 5f 46 69 6c 65 20 7c 20 58 |swix(OS_File | X|
00001540 4f 53 5f 42 69 74 2c 20 26 72 29 29 29 20 72 65 |OS_Bit, &r))) re|
00001550 74 75 72 6e 20 46 41 4c 53 45 3b 0a 20 20 66 6c |turn FALSE;. fl|
00001560 61 67 2d 3e 73 69 7a 65 20 3d 20 73 69 7a 65 3b |ag->size = size;|
00001570 0a 20 20 73 20 3d 20 28 73 70 72 69 74 65 5f 68 |. s = (sprite_h|
00001580 65 61 64 65 72 20 2a 29 28 28 63 68 61 72 20 2a |eader *)((char *|
00001590 29 66 6c 61 67 2b 66 6c 61 67 2d 3e 73 70 72 6f |)flag+flag->spro|
000015a0 66 66 29 3b 0a 20 20 66 6c 61 67 5f 69 6d 61 67 |ff);. flag_imag|
000015b0 65 5f 6f 66 66 73 65 74 20 3d 20 28 28 63 68 61 |e_offset = ((cha|
000015c0 72 20 2a 29 73 2b 73 2d 3e 69 6d 61 67 65 29 20 |r *)s+s->image) |
000015d0 2d 20 28 63 68 61 72 20 2a 29 66 6c 61 67 3b 0a |- (char *)flag;.|
000015e0 20 20 72 65 74 75 72 6e 20 54 52 55 45 3b 0a 7d | return TRUE;.}|
000015f0 0a 0a 69 6e 74 20 6d 61 69 6e 28 76 6f 69 64 29 |..int main(void)|
00001600 0a 7b 0a 20 20 69 6e 74 20 72 3b 0a 20 20 69 6e |.{. int r;. in|
00001610 74 20 6c 69 67 68 74 5f 69 6e 63 6c 2c 20 6c 69 |t light_incl, li|
00001620 67 68 74 5f 62 65 61 72 3b 0a 20 20 69 6e 74 20 |ght_bear;. int |
00001630 73 5b 32 5d 2c 20 70 5b 33 5d 3b 0a 20 20 69 6e |s[2], p[3];. in|
00001640 74 20 69 2c 20 6a 2c 20 74 2c 20 64 69 3b 0a 20 |t i, j, t, di;. |
00001650 20 69 6e 74 20 2a 66 3b 0a 20 20 69 6e 74 20 7a | int *f;. int z|
00001660 2c 20 79 3b 0a 20 20 66 6c 65 78 5f 69 6e 69 74 |, y;. flex_init|
00001670 28 29 3b 0a 20 20 73 65 74 5f 6d 6f 64 65 28 6d |();. set_mode(m|
00001680 61 78 73 78 2c 20 6d 61 78 73 79 2c 20 35 29 3b |axsx, maxsy, 5);|
00001690 0a 20 20 73 63 72 65 65 6e 20 3d 20 73 63 72 65 |. screen = scre|
000016a0 65 6e 5f 73 74 61 72 74 28 29 3b 0a 20 20 69 66 |en_start();. if|
000016b0 20 28 21 6c 6f 61 64 5f 66 6c 61 67 5f 73 70 72 | (!load_flag_spr|
000016c0 69 74 65 28 29 29 20 72 65 74 75 72 6e 20 30 3b |ite()) return 0;|
000016d0 0a 20 20 66 20 3d 20 28 69 6e 74 20 2a 29 28 28 |. f = (int *)((|
000016e0 63 68 61 72 20 2a 29 66 6c 61 67 20 2b 20 66 6c |char *)flag + fl|
000016f0 61 67 5f 69 6d 61 67 65 5f 6f 66 66 73 65 74 29 |ag_image_offset)|
00001700 3b 0a 20 20 64 69 20 3d 20 6f 6e 65 2a 73 63 61 |;. di = one*sca|
00001710 6c 65 2f 34 3b 0a 0a 20 20 61 6d 62 69 65 6e 74 |le/4;.. ambient|
00001720 5f 6c 69 67 68 74 3d 64 74 6f 66 70 28 30 2e 30 |_light=dtofp(0.0|
00001730 46 29 3b 20 64 69 72 65 63 74 5f 6c 69 67 68 74 |F); direct_light|
00001740 3d 64 74 6f 66 70 28 31 2e 35 46 29 3b 0a 20 20 |=dtofp(1.5F);. |
00001750 6c 69 67 68 74 5f 69 6e 63 6c 20 3d 20 28 69 6e |light_incl = (in|
00001760 74 29 28 30 2e 35 35 2a 6f 6e 65 29 3b 0a 20 20 |t)(0.55*one);. |
00001770 6c 69 67 68 74 5f 62 65 61 72 20 3d 20 28 69 6e |light_bear = (in|
00001780 74 29 28 30 2e 34 35 2a 6f 6e 65 29 3b 0a 20 20 |t)(0.45*one);. |
00001790 0a 20 20 72 20 3d 20 63 6f 73 31 36 28 6c 69 67 |. r = cos16(lig|
000017a0 68 74 5f 69 6e 63 6c 29 3b 0a 20 20 6c 78 20 3d |ht_incl);. lx =|
000017b0 20 6d 75 6c 5f 66 72 61 63 31 36 63 28 63 6f 73 | mul_frac16c(cos|
000017c0 31 36 28 6c 69 67 68 74 5f 62 65 61 72 29 2c 20 |16(light_bear), |
000017d0 72 29 3b 0a 20 20 6c 7a 20 3d 20 6d 75 6c 5f 66 |r);. lz = mul_f|
000017e0 72 61 63 31 36 63 28 73 69 6e 31 36 28 6c 69 67 |rac16c(sin16(lig|
000017f0 68 74 5f 62 65 61 72 29 2c 2d 72 29 3b 0a 20 20 |ht_bear),-r);. |
00001800 6c 79 20 3d 20 2d 73 69 6e 31 36 28 6c 69 67 68 |ly = -sin16(ligh|
00001810 74 5f 69 6e 63 6c 29 3b 0a 20 20 65 5b 30 5d 3d |t_incl);. e[0]=|
00001820 64 74 6f 66 70 28 31 2e 32 46 29 3b 0a 20 20 65 |dtofp(1.2F);. e|
00001830 5b 31 5d 3d 64 74 6f 66 70 28 30 2e 33 46 29 3b |[1]=dtofp(0.3F);|
00001840 0a 20 20 65 5b 32 5d 3d 64 74 6f 66 70 28 30 2e |. e[2]=dtofp(0.|
00001850 39 46 29 3b 0a 20 20 64 5b 30 5d 3d 64 74 6f 66 |9F);. d[0]=dtof|
00001860 70 28 30 2e 30 46 29 3b 0a 20 20 64 5b 31 5d 3d |p(0.0F);. d[1]=|
00001870 64 74 6f 66 70 28 30 2e 30 31 46 29 3b 0a 20 20 |dtofp(0.01F);. |
00001880 64 5b 32 5d 3d 64 74 6f 66 70 28 30 2e 31 46 29 |d[2]=dtofp(0.1F)|
00001890 3b 0a 0a 20 20 63 61 6c 63 5f 74 72 61 6e 73 28 |;.. calc_trans(|
000018a0 65 2c 20 64 2c 20 6d 78 29 3b 0a 20 20 66 6f 72 |e, d, mx);. for|
000018b0 20 28 74 3d 38 2a 6f 6e 65 2f 31 32 38 3b 3b 29 | (t=8*one/128;;)|
000018c0 20 7b 0a 20 20 20 20 66 6f 72 20 28 3b 20 74 3c | {. for (; t<|
000018d0 6f 6e 65 2f 38 3b 20 74 2b 3d 6f 6e 65 2f 31 32 |one/8; t+=one/12|
000018e0 38 29 20 7b 0a 20 20 20 20 20 20 62 62 63 5f 63 |8) {. bbc_c|
000018f0 6c 73 28 29 3b 20 0a 20 20 20 20 20 20 66 6f 72 |ls(); . for|
00001900 20 28 6a 3d 32 31 30 2a 6f 6e 65 2d 64 69 3b 20 | (j=210*one-di; |
00001910 6a 3e 3d 30 3b 20 6a 2d 3d 64 69 29 20 0a 20 20 |j>=0; j-=di) . |
00001920 20 20 20 20 20 20 66 6f 72 20 28 69 3d 31 34 30 | for (i=140|
00001930 2a 6f 6e 65 2d 64 69 3b 20 69 3e 3d 30 3b 20 69 |*one-di; i>=0; i|
00001940 2d 3d 64 69 29 20 7b 0a 20 20 20 20 20 20 20 20 |-=di) {. |
00001950 20 20 7a 20 3d 20 28 32 31 30 2a 6f 6e 65 2d 6a | z = (210*one-j|
00001960 29 2f 31 30 32 34 3b 0a 20 20 20 20 20 20 20 20 |)/1024;. |
00001970 20 20 79 20 3d 20 28 69 2d 37 30 2a 6f 6e 65 29 | y = (i-70*one)|
00001980 2f 31 30 32 34 3b 0a 20 20 20 20 20 20 20 20 20 |/1024;. |
00001990 20 70 5b 30 5d 3d 77 61 76 28 7a 2c 20 79 2c 20 | p[0]=wav(z, y, |
000019a0 74 29 3b 0a 20 20 20 20 20 20 20 20 20 20 70 5b |t);. p[|
000019b0 31 5d 3d 28 69 2d 37 30 2a 6f 6e 65 29 2f 31 36 |1]=(i-70*one)/16|
000019c0 30 3b 0a 20 20 20 20 20 20 20 20 20 20 70 5b 32 |0;. p[2|
000019d0 5d 3d 28 6a 2d 31 30 35 2a 6f 6e 65 29 2f 31 36 |]=(j-105*one)/16|
000019e0 30 3b 0a 20 20 20 20 20 20 20 20 20 20 69 66 20 |0;. if |
000019f0 28 21 70 72 6f 6a 65 63 74 5f 76 65 72 74 65 78 |(!project_vertex|
00001a00 28 70 2c 20 73 2c 20 6d 78 29 29 20 7b 0a 20 20 |(p, s, mx)) {. |
00001a10 20 20 20 20 20 20 20 20 20 20 69 66 20 28 73 63 | if (sc|
00001a20 72 65 65 6e 5b 73 5b 30 5d 2b 6d 61 78 73 78 2a |reen[s[0]+maxsx*|
00001a30 73 5b 31 5d 5d 3d 3d 30 29 0a 20 20 20 20 20 20 |s[1]]==0). |
00001a40 20 20 20 20 20 20 20 20 73 63 72 65 65 6e 5b 73 | screen[s|
00001a50 5b 30 5d 2b 6d 61 78 73 78 2a 73 5b 31 5d 5d 20 |[0]+maxsx*s[1]] |
00001a60 3d 20 63 61 6c 63 5f 63 6f 6c 6f 75 72 28 7a 2c |= calc_colour(z,|
00001a70 20 79 2c 20 74 2c 20 66 5b 28 31 33 39 2d 28 69 | y, t, f[(139-(i|
00001a80 3e 3e 6c 6f 6e 65 29 29 2a 32 31 30 2b 32 30 39 |>>lone))*210+209|
00001a90 2d 28 6a 3e 3e 6c 6f 6e 65 29 5d 29 3b 0a 20 20 |-(j>>lone)]);. |
00001aa0 20 20 20 20 20 20 20 20 7d 0a 20 20 20 20 20 20 | }. |
00001ab0 20 20 7d 0a 20 20 20 20 20 20 69 66 20 28 73 63 | }. if (sc|
00001ac0 61 6c 65 3d 3d 31 29 20 7b 0a 20 20 20 20 20 20 |ale==1) {. |
00001ad0 20 20 70 72 65 73 73 28 2d 39 39 29 3b 0a 20 20 | press(-99);. |
00001ae0 20 20 20 20 20 20 72 65 6c 65 61 73 65 28 2d 39 | release(-9|
00001af0 39 29 3b 0a 20 20 20 20 20 20 7d 0a 20 20 20 20 |9);. }. |
00001b00 20 20 6f 73 5f 73 77 69 31 28 4f 53 5f 42 79 74 | os_swi1(OS_Byt|
00001b10 65 2c 20 31 39 29 3b 0a 20 20 20 20 7d 0a 20 20 |e, 19);. }. |
00001b20 20 20 74 20 3d 20 30 3b 0a 20 20 7d 0a 0a 20 20 | t = 0;. }.. |
00001b30 72 65 74 75 72 6e 20 30 3b 0a 7d 0a |return 0;.}.|
00001b3c 
.