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467
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1 int printf(const char *format, ...);
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2
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444
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3 typedef struct {
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4 char x,y;
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5 } s;
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6
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7 char c[]={' ','\'','.',':',0x1b,'[','H'} ,
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8 M[ 1843]={4,5,6,} ,
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9 *m=&M[3],
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10 e;
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11 int a,b;
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12
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13 s P[15],Q[15];
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14
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15 o(x,y){
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16 a=80*(y/2)+x,b= 1+(y&1);
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17 e?(m[a]|=b):(m[a]&=~b);
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18
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491
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19 printf("#0018:x %02x y %02x a %04x m[a] %02x\n",x,y,a,m[a]);
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444
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20 }
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21
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22 W(s*p,s*q){
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23 s t;
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24 t=*p;
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25 *p=*q;
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26 *q=t;
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27 }
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28
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29 l(s p, s q){
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30 s t;
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31 int x=p.x-q.x,
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32 y=p.y-q.y,
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33 w,
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34 v;
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35
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491
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36 printf("#0035:p.x %02x p.y %02x q.x %02x q.y %02x\n",p.x,p.y,q.x,q.y);
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444
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37
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38 x=x<0?-x:x;
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39 y=y<0?-y:y;
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40 if(y<x){
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41 if( q.x<p.x)
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42 W(&p,&q);
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43 v=p.y<=q.y?1:-1;
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44 w=(y%x)/2;
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45 for(; p.x<=q.x; p.x++){
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46 o(p.x, p.y);
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47 if((w-=y)<=0)
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48 w+=x,p.y+=v;
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49 }
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50 } else if(y){
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51 if(q.y<p.y)
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52 W(&p,&q);
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53 v=!(p. x>q.x)?1:-1;
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54 w=(x%y)/2;
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55 for(; p.y<=q.y; p.y++){
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56 o(p.x,q.y);
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57 if((w-=x)<=0)
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58 w+= y,
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59 p.x+=v;
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60 }
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61 }
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62 }
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63
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64 r(s*p,s q){
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65 p->x=((rand()%80)-q.x)/11;
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66 p->y=((rand()%48)-q.y)/11;
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491
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67 printf("#0066:r: p->x %02x p->y %02x\n",p->x,p->y);
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444
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68 }
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69
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70 d(s*p,s q,s r){
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491
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71 printf("#0070:d0: q->x %02x q->y %02x\n",q.x,q.y);
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72 printf("#0071:d1: r->x %02x r->y %02x\n",r.x,r.y);
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444
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73 p->x=q.x+r.x;
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74 p->y=q.y+r.y;
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491
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75 printf("#0074:d2: p->x %02x p->y %02x\n",p->x,p->y);
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444
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76 }
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77
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78 main(i,j,k){
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79 s R,S;
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80 int count;
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81 i=0,
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82 k=0;
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83 srand(512);
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84 for(count=0;count<400 ;count++){
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85 j=(i+1)%10;
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86 e=0;
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87 l(P[j],Q[j]);
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491
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88 printf("#0087:main0: p.x %02x p.y %02x q.x %02x q.y %02x\n",P[j].x,P[j].y,Q[j].x,Q[j].y);
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444
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89 if(--k<=0){
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90 r(&R,P[i]);
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91 r(&S,Q[i ]);
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491
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92 printf("#0091:main1: R.x %02x R.y %02x S.x %02x S.y %02x\n",R.x,R.y,S.x,S.y);
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444
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93 k=10;
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94 }
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95 d(&P[j],P[i],R);
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491
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96 printf("#0095:main2: p.x %02x p.y %02x q.x %02x q.y %02x\n",P[j].x,P[j].y,Q[i].x,Q[i].y);
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444
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97 d(&Q[j],Q[i],S);
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491
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98 printf("#0097:main3: p.x %02x p.y %02x q.x %02x q.y %02x\n",P[j].x,P[j].y,Q[i].x,Q[i].y);
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444
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99 i=j;
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100 e=1;
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101 l(P[j],Q[j]);
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491
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102 printf("#0101:main4: p.x %02x p.y %02x q.x %02x q.y %02x\n",P[j].x,P[j].y,Q[i].x,Q[i].y);
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444
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103 b=83;
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104 if (0)
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105 for (a=0; a<sizeof M; a++){
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106 if(--b<=0)
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107 b=80,putchar('\n');
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108 putchar(c[M[a]]);
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109 }
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110 }
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111 }
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112
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113
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