#define TURTLE_SIZE 4 #define TURTLE_SPEED_STEP 2 #define ANGLES 35 F64 angles[ANGLES]={ -2*pi/1,-2*pi/2,-2*pi/3,-2*pi/4,-2*pi/5, -2*pi/6,-2*pi/8,-2*pi/9,-2*pi/10, -2*pi/12,-2*pi/15,-2*pi/18,-2*pi/20, -2*pi/24,-2*pi/30,-2*pi/36,-2*pi/40, 0, 2*pi/40,2*pi/36,2*pi/30,2*pi/24, 2*pi/20,2*pi/18,2*pi/15,2*pi/12, 2*pi/10,2*pi/9,2*pi/8,2*pi/6, 2*pi/5,2*pi/4,2*pi/3,2*pi/2,2*pi/1 }; class Turtle { F64 x,y,z,speed,theta,w; I64 dtheta_idx; CColorROPU16 edge,middle; Bool ends,first; } tt; U0 TurtlePlot(CDC *dc,Turtle *t,CColorROPU16 edge,CColorROPU16 middle) { F64 w=t->w/2.0-1; if (w<0) w=0; dc->color=middle; GrLine3(dc,t->x+w*Cos(t->theta+pi/2),t->y+w*Sin(t->theta+pi/2),t->z, t->x+w*Cos(t->theta-pi/2),t->y+w*Sin(t->theta-pi/2),t->z); w=t->w/2.0; dc->color=edge; GrPlot3(dc,t->x+w*Cos(t->theta+pi/2),t->y+w*Sin(t->theta+pi/2),t->z); GrPlot3(dc,t->x+w*Cos(t->theta-pi/2),t->y+w*Sin(t->theta-pi/2),t->z); } U0 TurtleMicroMove(Turtle *t,F64 dt) { t->x+=dt*t->speed*Cos(t->theta); t->y+=dt*t->speed*Sin(t->theta); t->theta=Wrap(t->theta+dt*angles[t->dtheta_idx]); } U0 TurtleEnd(CDC *dc,Turtle *t,CColorROPU16 edge,CColorROPU16 middle,F64 theta) { F64 r,x,y2; Turtle t2; if (r=t->w) { MemCpy(&t2,t,sizeof(Turtle)); //Save x=0; while (TRUE) { t->x+=1/r*Cos(theta); t->y+=1/r*Sin(theta); x+=1/r; y2=r*r-4*x*x; if (y2>=0) { t->w=Sqrt(y2); TurtlePlot(dc,t,edge,middle); } else break; } MemCpy(t,&t2,sizeof(Turtle)); } } U0 TurtleMove(CDC *dc,Turtle *t,CColorROPU16 edge,CColorROPU16 middle) { I64 i,l=16*AbsI64(t->w+1)*AbsI64(t->speed+1); if (t->ends && t->first) TurtleEnd(dc,t,edge,middle,t->theta+pi); t->first=FALSE; for (i=0;i<l;i++) { TurtleMicroMove(t,1.0/l); TurtlePlot(dc,t,edge,middle); } if (t->ends) TurtleEnd(dc,t,edge,middle,t->theta); } U0 TurtleInit(Turtle *t) { MemSet(t,0,sizeof(Turtle)); t->x=Fs->pix_width>>1; t->y=Fs->pix_height>>1; t->z=5; t->edge=BLACK; t->middle=YELLOW; t->dtheta_idx=ANGLES/2; t->first=TRUE; t->ends=TRUE; } U0 DrawIt(CTask *,CDC *dc) { Turtle t2; MemCpy(&t2,&tt,sizeof(Turtle)); GrPrint(dc,0,0,"Layer:%f Speed:%f theta:%5.1f dtheta:%5.1f Width:%f", tt.z,tt.speed,tt.theta*180/pi,angles[tt.dtheta_idx]*180/pi,tt.w); TurtleMove(dc,&t2,RED,LTRED); dc->color=LTRED; GrLine(dc,t2.x+TURTLE_SIZE*Cos(t2.theta+pi/2),t2.y+TURTLE_SIZE*Sin(t2.theta+pi/2), t2.x+TURTLE_SIZE*Cos(t2.theta-pi/2),t2.y+TURTLE_SIZE*Sin(t2.theta-pi/2)); GrLine(dc,t2.x+TURTLE_SIZE*Cos(t2.theta+pi/2),t2.y+TURTLE_SIZE*Sin(t2.theta+pi/2), t2.x+TURTLE_SIZE*Cos(t2.theta), t2.y+TURTLE_SIZE*Sin(t2.theta)); GrLine(dc,t2.x+TURTLE_SIZE*Cos(t2.theta-pi/2),t2.y+TURTLE_SIZE*Sin(t2.theta-pi/2), t2.x+TURTLE_SIZE*Cos(t2.theta), t2.y+TURTLE_SIZE*Sin(t2.theta)); } U0 SetMenu() { I64 i; U8 buf[STR_LEN]; CMenuEntry *tmpse; for (i=0;i<=9;i++) { StrPrint(buf,"Settings/Layer%d",i); if (tmpse=MenuEntryFind(Fs->cur_menu,buf)) { if (i==tt.z) tmpse->checked=TRUE; else tmpse->checked=FALSE; } } if (tmpse=MenuEntryFind(Fs->cur_menu,"Settings/Ends")) { if (tt.ends) tmpse->checked=TRUE; else tmpse->checked=FALSE; } } U0 Lattice() { Bool aim=FALSE; I64 arg1,arg2; CDC *dc=DCAlias; DCDepthBufAlloc(dc); MenuPush( "File {" " Abort(,CH_SHIFT_ESC);" " Exit(,CH_ESC);" "}" "Play {" " Restart(,'\n');" " Step(,CH_SPACE);" " Accelerator(,,SC_CURSOR_UP);" " Break(,,SC_CURSOR_DOWN);" " Left(,,SC_CURSOR_LEFT);" " Right(,,SC_CURSOR_RIGHT);" "}" "Settings {" " Color(,'c');" " Wider(,'+');" " Narrower(,'-');" " Ends(,'e');" " Layer0(,'0');" " Layer1(,'1');" " Layer2(,'2');" " Layer3(,'3');" " Layer4(,'4');" " Layer5(,'5');" " Layer6(,'6');" " Layer7(,'7');" " Layer8(,'8');" " Layer9(,'9');" "}" ); SettingsPush; //See SettingsPush AutoComplete; WinBorder; WinMax; DocCursor; DocClear; TurtleInit(&tt); SetMenu; Fs->win_inhibit=WIG_TASK_DFT-WIF_FOCUS_TASK_MENU -WIF_SELF_FOCUS-WIF_SELF_GRAB_SCROLL; Fs->draw_it=&DrawIt; try { while (TRUE) { switch (GetMsg(&arg1,&arg2,1<<MSG_KEY_DOWN|1<<MSG_MS_L_DOWN| 1<<MSG_MS_R_DOWN|1<<MSG_MS_R_UP|1<<MSG_MS_MOVE)) { case MSG_MS_L_DOWN: tt.first=TRUE; tt.x=arg1; tt.y=arg2; break; case MSG_MS_R_DOWN: aim=TRUE; tt.theta=Arg(arg1-tt.x,arg2-tt.y); break; case MSG_MS_MOVE: if (aim) tt.theta=Arg(arg1-tt.x,arg2-tt.y); break; case MSG_MS_R_UP: tt.theta=Arg(arg1-tt.x,arg2-tt.y); aim=FALSE; break; case MSG_KEY_DOWN: switch (arg1) { case 0: switch (arg2.u8[0]) { case SC_CURSOR_LEFT: if (tt.dtheta_idx) tt.dtheta_idx--; break; case SC_CURSOR_RIGHT: if (tt.dtheta_idx<ANGLES-1) tt.dtheta_idx++; break; case SC_CURSOR_UP: tt.speed+=TURTLE_SPEED_STEP; break; case SC_CURSOR_DOWN: if (tt.speed>=TURTLE_SPEED_STEP) tt.speed-=TURTLE_SPEED_STEP; break; } break; case '0'...'9': tt.z=arg1-'0'; SetMenu; break; case 'c': tt.middle=PopUpColor("Mid Color\n\n"); tt.edge =PopUpColor("Edge Color\n\n"); break; case 'e': tt.ends=!tt.ends; break; case '+': tt.w++; break; case '-': if (tt.w) tt.w--; break; case '\n': DCFill(dc); TurtleInit(&tt); SetMenu; break; case CH_ESC: case CH_SHIFT_ESC: goto lt_done; case CH_SPACE: TurtleMove(dc,&tt,tt.edge,tt.middle); break; } } } lt_done: GetMsg(,,1<<MSG_KEY_UP); } catch PutExcept; SettingsPop; DCFill(dc); DCDel(dc); MenuPop; } Lattice;