/* vbunny_spider.c : example file for 6.837 F97 PS3A */ #include #include #include #include #include #include "arg_parse.h" #define HALFPI (PI/2) /* common to all programs */ int debug, helponly; void emit_help( void ) { extern char helpmsg[]; /* defined below */ fprintf (stderr, helpmsg); } /* output legal inventor file header, with */ /* timestamp, creator id, and command line */ void emit_header( int argc, char *argv[], FILE* f) { struct passwd *pwent = NULL; time_t cl; /* output inventor header */ fprintf (f,"#Inventor V2.1 ascii\n"); /* output date/timestamp */ cl = time(NULL); fprintf (f,"# %s", asctime (localtime(&cl))); /* output creator uid */ pwent = getpwuid(getuid()); fprintf (f,"# Created by %s using\n#", pwent->pw_name ); /* echo command line */ while (argc--) fprintf (f, " %s", *argv++ ); fprintf (f,"\n"); } /* YOU SHOULD NOT NEED TO EDIT ANYTHING ABOVE */ /* THIS LINE, BUT YOU MAY DO SO IF YOU WISH. */ /* extended help message */ char helpmsg[] = "\ Usage: vbunny_spider [options] ('-' prints all options; -help prints this msg)\n\ Generates a spider.\n\ -legs tells number of legs (8 is default)\n\ -body tells size of body compared to legs (1 is default)\n\ -speed sets the speed of leg animation (2 is default)\n\ -eyes sets the number of eyes. 0 means no eyes.\n\ -eyespeed sets the speed of eye rotation (0.4 is default)\n\ -stalkheight sets the height of the eyestalks\n\ -trans is how transparent the body is (max 1)\n\ -dist sets the distance walked. 0 means no translation"; /* parameters specific to object you are defining */ float thickness = 0.025, depth = 0.25, width = 0.8; float redcomp = 0.4, greencomp = 0.5, bluecomp = 0.6; void writeLeg(FILE* f) { fprintf(f,"Switch {\n"); fprintf(f," DEF myleg Separator {\n"); fprintf(f," Material {diffuseColor 0.7 0 0} # Dark Red\n"); fprintf(f," Coordinate3 {\n"); fprintf(f," point [ 0 0.2 0.2,\n"); //0 fprintf(f," 0 0.2 -0.2,\n"); //1 fprintf(f," 0 -0.2 -0.2,\n"); //2 fprintf(f," 0 -0.2 0.2,\n"); //3 fprintf(f," 0.2 0.1 0.1,\n"); //4 fprintf(f," 0.2 0.1 -0.1,\n"); //5 fprintf(f," 0.2 -0.1 -0.1,\n"); //6 fprintf(f," 0.2 -0.1 0.1,\n"); //7 fprintf(f," 2 0 0]\n"); //8 fprintf(f," } # Coordinate 3\n"); fprintf(f," DEF myseg Separator {\n"); fprintf(f," IndexedFaceSet { coordIndex [0,1,2,3,-1,\n"); fprintf(f," 0,4,5,1,-1,\n"); fprintf(f," 1,5,6,2,-1,\n"); fprintf(f," 2,6,7,3,-1,\n"); fprintf(f," 3,7,4,0,-1,\n"); fprintf(f," 4,8,5,-1,\n"); fprintf(f," 5,8,6,-1,\n"); fprintf(f," 6,8,7,-1,\n"); fprintf(f," 7,8,4,-1]\n"); fprintf(f," } #indexed face\n"); fprintf(f," } # my Seg\n"); fprintf(f," Translation {translation 2 0 0}\n"); fprintf(f," Sphere {radius 0.1}\n"); fprintf(f," Translation {translation -2 0 0}\n"); fprintf(f," Translation {translation 2 -2 0}\n"); fprintf(f," Rotation {rotation 0 0 1 %f}\n",HALFPI); fprintf(f," USE myseg\n"); fprintf(f," } # Separator myleg\n"); fprintf(f,"} #Switch\n"); } void writeEye(FILE *f,float eyespeed,float sh) { fprintf(f,"Switch {\n"); fprintf(f," DEF mystalk Separator {\n"); fprintf(f," Translation {translation 0 %f 0}\n",sh/2); fprintf(f," Material {diffuseColor 0 0 0.5} # Dark Blue\n"); fprintf(f," Cylinder {radius 0.15\n height %f} # \n",sh); fprintf(f," Translation {translation 0 %f 0}\n",sh/2); fprintf(f," Material {diffuseColor 1 1 1} # White\n"); fprintf(f," Sphere {radius 0.4}\n"); fprintf(f," Material {diffuseColor 0.1 0.1 0.1} # Dark Dark Gray\n"); if(eyespeed!=0) { fprintf(f," Rotor { rotation 0 1 0 0.1\n"); fprintf(f," speed %f}\n",eyespeed+2*eyespeed*(float)rand()/32000); } fprintf(f," Rotation {rotation 0 1 0 %f}\n",(float)rand()/15000); fprintf(f," Translation {translation -0.35 0 0}\n"); fprintf(f," Sphere {radius 0.15}\n"); fprintf(f," } # mystalk\n"); fprintf(f,"} #Switch\n"); } void writeBody(FILE* f,int maxlegs,float bodySize,float speed,int maxEyes,int dist,float trans,char* defName) { int legnum,eyenum; float rot; float s; srand(time(NULL)); s=3+3+bodySize; //biggest dimension is width s=1/s; if(defName==NULL) fprintf(f,"DEF vbunny_spider Separator {\n"); else fprintf(f,"DEF %s Separator {\n",defName); //body must fit in 1x1x1 cube, so scale everthing... fprintf(f," Scale {scaleFactor %f %f %f}\n",s,s,s); //align so Z is up axis... fprintf(f," Rotation {rotation 1 0 0 %f}\n",HALFPI); fprintf(f," Shuttle {\n"); fprintf(f," translation0 0 0 %f\n",(float)0); fprintf(f," translation1 0 0 %f\n",(float)dist*1.5); fprintf(f," speed %f\n}",(float)0.5*speed/dist); fprintf(f,"Separator {\n"); fprintf(f," Material {emissiveColor 0 0.1 0\n"); fprintf(f," diffuseColor 0 1 0\n"); fprintf(f," transparency %f} # see through?\n",trans); fprintf(f," Scale { scaleFactor 1 0.5 1} # flat spheres\n"); fprintf(f," Sphere { radius %f}\n",(float)bodySize*1.05); fprintf(f," Translation { translation 0 %f 0}\n",bodySize); fprintf(f," Sphere { radius %f}\n",(float)bodySize/2); fprintf(f,"} # Separator for Torso\n"); fprintf(f,"Separator {\n"); fprintf(f," Translation { translation 0 %f 0}\n",bodySize*0.55); rot=PI/((float)maxEyes+1); fprintf(f," Rotation {rotation 0 0 1 %f}\n",HALFPI); for(eyenum=0;eyenum16000) { fprintf(f," rotation0 0 0 1 %f\n",HALFPI/8); fprintf(f," rotation1 0 0 1 %f\n",(HALFPI/4)+(HALFPI/6)); } else { fprintf(f," rotation0 0 0 1 %f\n",HALFPI/6+HALFPI/4); fprintf(f," rotation1 0 0 1 %f\n",(HALFPI/8)); } fprintf(f," speed %f\n",speed); fprintf(f," } # Pendulum\n"); fprintf(f," USE myleg\n"); fprintf(f,"} # Separator for leg %d\n",legnum+1); } fprintf(f,"} # Separator for spider\n"); } int main( int argc, char *argv[]) { FILE *f; int numberOfLegs=8; //the number of legs the spider has float bodySize=1,eyeSpeed=0.4; float speed=2,stalkheight=2,trans=0; int dist=5,numberOfEyes=2; char *defname = NULL; /* parse command line arguments */ extern int arg_parse(int ac, char **av, ...); if (arg_parse(argc, argv, "-help", ARG_FLAG(&helponly), "output an extensive help message and quit", "-debug", ARG_FLAG(&debug), "set debug flag", "-legs %d", &numberOfLegs, "set number of legs", "-body %f", &bodySize, "set size of body compared to legs", "-speed %f", &speed, "sets the leg speed.", "-eyespeed %f", &eyeSpeed, "sets the eyespeed.", "-dist %d", &dist, "sets the distance walked. 0=no walk Should be less than 10", "-eyes %d", &numberOfEyes, "sets the number of Eyes.. >=0", "-stalkheight %f", &stalkheight, "the height of the eye stalks", "-trans %f", &trans, "How transparent the body is (amx 1)", "-defname %S", &defname, "inventor definition name", 0) < 0) exit(1); /* give help if requested */ if ( helponly ) { emit_help(); exit(0); } if(defname!=NULL) f=fopen(defname,"wb+"); else f=stdout/*fopen("vbunny_spider\0","wb+")*/; emit_header( argc, argv, f ); //check params... if(numberOfLegs<0) numberOfLegs=8; if(bodySize<0) bodySize=0; if(numberOfEyes<0) numberOfEyes=2; if(dist>10) dist=10; if(stalkheight<0) stalkheight=2; if(trans>1 || trans<0) trans=0; writeLeg(f); /*write the leg into the iv file*/ writeEye(f,eyeSpeed,stalkheight); /*write the eye stalk into the iv file*/ writeBody(f,numberOfLegs,bodySize,speed,numberOfEyes,dist,trans,defname); /* for now, we just echo all program state */ fprintf (stderr, "\tdebug is %d\n", debug); fprintf (stderr, "\tlegs is %d\n", numberOfLegs); fprintf (stderr, "\tbody is %f\n", bodySize); fprintf (stderr, "\tspeed is %f\n", speed); fprintf (stderr, "\tnumber of eyes is %d\n", numberOfEyes); fprintf (stderr, "\teyespeed is %f\n", eyeSpeed); fprintf (stderr, "\tstalkheight is %f\n", stalkheight); fprintf (stderr, "\tdistance walked is %d\n", dist); fprintf (stderr, "\ttrans is %f\n", trans); if (defname == NULL) defname = "null"; fprintf (stderr, "\tdefname is '%s'\n", defname); fclose(f); /* return OK status */ return 0; }