TnyGfx

Tweet-sized graphics programs in C/C++.

[TnyGfx @tnygfx]

@tnysnd // oscilloscope
float b[4096],r,l=-1,n,m,a;int i,y,v,t;int main(int c,char**g){n=m=atof(g[1]);while(read(0,&r,4)>0){b[i++]=r;a=.9*a+.1*r;if(!t&&i<m-788&&l<0&&a>0)t=i-9;if(i>n-1){n+=m-i;for(y=-128;y<128;y++)for(i=0;i<768;i++)v=-127*b[i+t],putchar(-(y<0?y>v:y<v));i=t=0;}l=a;}}

[TnySnd @tnysnd]

float a,b,c,d,e,t,u,r,n;int s,p;int main(){for(;p=1<<((s>>12)&15),s&4095||(p&65&&(a=.8,d=.1,t=0),p&4112&&(b=.3,e=.2,u=0),c=s&8192?.08:.03),r=2*drand48()-1,s&1||(n=r),r=a*sin(t)+b*(n+sin(u))+c*r,s++<4<<16;a*=.9999,b*=.9992,c*=.9983,d*=.993,e*=.994,t+=.01+d,u+=.03+e)write(1,&r,4);}

[TnyGfx @tnygfx]

Output: RGB bytes 512x512
Generate frame: gcc -DT=0 -include stdlib.h -include unistd.h -include math.h -lm src.c && ./a.out | convert -depth 8 -size 512x512+0 rgb:- img.png
Anim: T=0..511

[TnyGfx @tnygfx]

char*o,m[3<<18];int i,x,y,u,v,r,n;int main(){for(;r=1+1e-4*i*i,n=rand(),v=(n>>6)-T*(1+i/64),u=sin((n>>28)*T*2*M_PI/512)*r*(n&7)/14+n,i<512;i++)for(y=v-r;y<v+r;y++)for(x=u-r;o=m+1536*(y&511)+3*(x&511),x<u+r;x++)if(hypot(x-u,y-v)<r)*o=n>>20,o[1]=n>>11,o[2]=n>>16;write(1,m,3<<18);}

[TnyGfx @tnygfx]

Gray bytes 512x512
Gen frame: gcc -Wall -O3 -DT=0 -DA=0 -DM=0.4 -DS=0.1 -DY=2000 -include stdio.h -include tgmath.h -lm src.c && ./a.out | convert -depth 8 -size 512x512+0 gray:- img.png
Anim: T=0..-16π, A=0..2π, M=0.4~2.0(3), S=0.1~0.02, Y=2000~2400(2); ~(n)=cos trans (n reps)

[TnyGfx @tnygfx]

int x,y,s,t,u,v,q=256;float a=sin(A),b=cos(A);int main(){for(y=-q;y<q;y++)for(x=-q;u=(b*x-a*y)/M,v=(a*x+b*y)/M,s=16+u-((u+((v+Y)/28&1?16:0))&31),t=14+v-(v+Y)%28,u=(b*s+a*t)*M,v=(b*t-a*s)*M,x<q;x++)putchar(hypot(u-x,v-y)<(6+7*cos(T+S*hypot(u,v)))*M?-1:0);}

[TnyGfx @tnygfx]

// simplified hex version (max circle radius = 14)
int x,y,s,t;int main(){for(;y<512;y++)for(x=0;s=16+x-((x+(y/28&1?16:0))&31),t=14+y-y%28,x<512;x++)putchar(hypot(s-x,t-y)<6+7*sin(T+hypot(s-256,t-256)/32)?-1:0);}

[TnyGfx @tnygfx]

// hex version
int x,y,u,v,s,t;int main(){for(;v=y%28,y<512;y++)for(x=0;s=16,t=28,u=(x+(y/t&1?16:0))&31,x<512;s+=x-u,t+=y-v,putchar(hypot(s-x,t-y)<6+7*sin(T+hypot(s-256,t-256)/32)?-1:0),x++)if(u<16&&v<-0.6*(u-32))s=t=0;else if(u>=16&&v<0.6*u)s=32,t=0;}

[TnyGfx @tnygfx]

char b[1<<18];int x,y;int main(){for(;y<512;y++)for(x=0;x<512;x++)b[512*y+x]=hypot(16-x+(x&~31),(y&~31)+16-y)<6+7*sin(T+hypot((x>>5)-7.5,(y>>5)-7.5))?-1:0;write(1,b,1<<18);}

[TnyGfx @tnygfx]

// shorter
int x,y;int main(){for(;y<512;y++)for(x=0;x<512;x++)putchar(hypot(16-x+(x&~31),(y&~31)+16-y)<6+7*sin(T+hypot((x>>5)-7.5,(y>>5)-7.5))?-1:0);}

[TnyGfx @tnygfx]

Output: RGB bytes 512x512
To build: gcc -Wall -O3 -DT=0.022 -include unistd.h -include tgmath.h -lm src.c && ./a.out | convert -depth 8 -size 512x512+0 rgb:- img.png
Animation: T = -0.019 + 0.041 * cos(2π * frame / 240); frame = 0..239

[TnyGfx @tnygfx]

char b[3<<18];int x,y,i,j;double complex v[]={44,20,T*100,8,8*I,-8},r[]={1,-4,16,1,1,1},p;int main(){while(j++<1.6e6)for(p=i=0;i<6;i++)y=256-cimag(p),x=256+creal(p),i<3?p+=j*3e-6*v[i]:(y|x)>>9||(b[y*1536+x*3+i-3]=15*(9+creal(v[i]))),v[i]*=exp((r[i]+T)*1e-4*I);write(1,b,3<<18);}

[TnyGfx @tnygfx]

Thick lines version.
Output: RGB bytes 1024x1024
To build: gcc -Wall -O3 -include unistd.h -include tgmath.h -lm src.c && ./a.out | convert -depth 8 -size 1024x1024+0 rgb:- img.png

[TnyGfx @tnygfx]

char b[3<<18];int x,y,i,j;double complex v[]={1,9,2,8,8*I,-8},r[]={-3,1,-4,1,9,4},p;int main(){while(j++<2e6)for(p=i=0;i<6;i++)y=256-cimag(p),x=256+creal(p),i<3?p+=j*1e-5*v[i]:(y|x)>>9||(b[y*1536+x*3+i-3]=15*(9+creal(v[i]))),v[i]*=exp((r[i]+0.02)*1e-4*I);write(1,b,3<<18);}

[TnyGfx @tnygfx]

char b[3<<20];int x,y,i,j;double complex v[]={10,90,20,1,8,8*I,-8},r[]={-3,1,-4,1e4,1,9,4},p;int main(){while(j++<2e7)for(p=i=0;i<7;i++)y=512-cimag(p),x=512+creal(p),i<4?p+=(i<3?j*2e-7:1)*v[i]:(b[y*3072+x*3+i-4]=15*(9+creal(v[i]))),v[i]*=exp((r[i]+0.02)*1e-5*I);write(1,b,3<<20);}

[TnyGfx @tnygfx]

Output: RGB bytes 1024x1024
To build: gcc -Wall -O3 -include unistd.h -include tgmath.h -lm src.c && ./a.out | convert -depth 8 -size 1024x1024+0 rgb:- img.png

[TnyGfx @tnygfx]

char b[3<<20];int x,y,i,j;double complex v[]={1,9,2,8,8*I,-8},r[]={-3,1,-4,1,9,4},p;int main(){while(j++<2e6)for(p=i=0;i<6;)y=512-cimag(p),x=512+creal(p),i<3?p+=j*2e-5*v[i]:(y|x)>>10||(b[y*3072+x*3+i-3]=15*(9+creal(v[i]))),v[i++]*=exp((r[i]+0.02)*1e-4*I);write(1,b,3<<20);}

[TnyGfx @tnygfx]

This is a fixed version... the original had an undefined operation on i in "v[i++]*=..."