Slika:GreatStellatedDodecahedron.jpg

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Povzetek

Opis
English: Great stellated dodecahedron, rendered with POVRay
 Ta slika je bila ustvarjena z POV-Ray.
Vir lastno delo
Avtor User Cyp

Licenca

Jaz, imetnik avtorskih pravic na tem delu, ga s tem objavljam pod naslednjimi licencami:
GNU head Ta dokument je dovoljeno kopirati, razširjati in/ali spreminjati pod pogoji Licence GNU za prosto dokumentacijo, različica 1.2 ali katera koli poznejša, ki jo je objavila ustanova Free Software Foundation; brez nespremenljivih delov ter brez besedil na sprednji ali zadnji platnici. Kopija licence je vključena v razdelek Licenca GNU za prosto dokumentacijo.
w:sl:Creative Commons
priznanje avtorstva deljenje pod enakimi pogoji 		Datoteka je objavljena pod licenco Creative Commons Priznanje avtorstva-Deljenje pod enakimi pogoji 3.0 Brez predelav.
Dovoljeno vam je:
  • deljenje – reproducirati, distribuirati in javno priobčevati delo
  • predelava – predelati delo
Pod naslednjimi pogoji:
  • priznanje avtorstva – Navesti morate ustrezno avtorstvo, povezavo do licence in morebitne spremembe. To lahko storite na kakršen koli primeren način, vendar ne na način, ki bi nakazoval, da dajalec licence podpira vas ali vašo uporabo dela.
  • deljenje pod enakimi pogoji – Če boste to vsebino predelali, preoblikovali ali uporabili kot izhodišče za drugo delo, morate svoj prispevek distribuirati pod isto ali združljivo licenco, kot jo ima izvirnik.
Ta oznaka dovoljenja je bila datoteki dodana kot del posodobitve licence GFDL.
w:sl:Creative Commons
priznanje avtorstva deljenje pod enakimi pogoji
Datoteka je objavljena pod licencami Creative Commons Priznanje avtorstva-Deljenje pod enakimi pogoji 2.5 Generična, 2.0 Generična in 1.0 Generična.
Dovoljeno vam je:
  • deljenje – reproducirati, distribuirati in javno priobčevati delo
  • predelava – predelati delo
Pod naslednjimi pogoji:
  • priznanje avtorstva – Navesti morate ustrezno avtorstvo, povezavo do licence in morebitne spremembe. To lahko storite na kakršen koli primeren način, vendar ne na način, ki bi nakazoval, da dajalec licence podpira vas ali vašo uporabo dela.
  • deljenje pod enakimi pogoji – Če boste to vsebino predelali, preoblikovali ali uporabili kot izhodišče za drugo delo, morate svoj prispevek distribuirati pod isto ali združljivo licenco, kot jo ima izvirnik.
Izberete lahko licenco po svoji izbiri.

Source

//GPL
#include <stdio.h>
#include <math.h>

#include <vector>

using std::vector;

const char *theader = "//Picture   ***  Use flashiness=1 !!! ***\n//\n//   +w1024 +h1024 +a0.3 +am2\n//   +w512 +h512 +a0.3 +am2\n//\n//Movie   ***  Use flashiness=0.25 !!! ***\n//\n//   +kc +kff120 +w256 +h256 +a0.3 +am2\n//   +kc +kff60 +w256 +h256 +a0.3 +am2\n//\"Fast\" preview\n//   +w128 +h128\n#declare notwireframe=1;\n#declare withreflection=0;\n#declare flashiness=1; //Still pictures use 1, animated should probably be about 0.25.\n\n#declare rotation=seed(%d);\n\n#declare rot1=rand(rotation)*pi*2;\n#declare rot2=acos(1-2*rand(rotation));\n#declare rot3=(rand(rotation)+clock)*pi*2;\n#macro dorot()\n  rotate rot1*180/pi*y\n  rotate rot2*180/pi*x\n  rotate rot3*180/pi*y\n#end\n\n";

const char *tline = "object {\n  cylinder { <%lf,%lf,%lf>, <%lf,%lf,%lf>, .01 dorot() }\n  pigment { colour <.3,.3,.3> }\n  finish { ambient 0 diffuse 1 phong 1 }\n}\n\n";

const char *tvertex = "object {\n  sphere { <%lf,%lf,%lf>, .01 dorot() }\n  pigment { colour <.3,.3,.3> }\n  finish { ambient 0 diffuse 1 phong 1 }\n}\n\n";

const char *tstartmesh = "object {\n  mesh {\n";

const char *ttriangle = "    triangle {\n      <%lf,%lf,%lf>, <%lf,%lf,%lf>, <%lf,%lf,%lf>\n    }\n";

const char *tendmesh = "    //sphere { <0,0,0>, 1 }\n    //sphere { <0,0,0>, ld+.01 inverse }\n    dorot()\n  }\n  pigment { colour rgbt <.8,.8,.8,.4> }\n  finish { ambient 0 diffuse 1 phong flashiness #if(withreflection) reflection { .2 } #end }\n  //interior { ior 1.5 }\n  photons {\n    target on\n    refraction on\n    reflection on\n    collect on\n  }\n}\n\n";

const char *tfooter = "//  CCC Y Y PP\n//  C   Y Y P P\n//  C    Y  PP\n//  C    Y  P\n//  CCC  Y  P\n\n#local a=0;\n#while(a<11.0001)\n  light_source { <4*sin(a*pi*2/11), 5*cos(a*pi*6/11), -4*cos(a*pi*2/11)> colour (1+<sin(a*pi*2/11),sin(a*pi*2/11+pi*2/3),sin(a*pi*2/11+pi*4/3)>)*2/11 }\n  #local a=a+1;\n#end\n\nbackground { color <1,1,1> }\n\ncamera {\n  perspective\n  location <0,0,0>\n  direction <0,0,1>\n  right x/2\n  up y/2\n  sky <0,1,0>\n  location <0,0,-4.8>\n  look_at <0,0,0>\n}\n\nglobal_settings {\n  max_trace_level 40\n  photons {\n    count 200000\n    autostop 0\n  }\n}\n";

#define PHI ((1+sqrt(5))/2)
#define PI (3.14159265358979323846264338327)
#define SQ2 (sqrt(2))
#define SQ3 (sqrt(3))

bool eq(double a, double b)
{
    return a+0.00001>=b&&b+0.00001>=a;
}

bool eqt(double a1, double a2, double a3, double b1, double b2, double b3)
{
//printf("Tri: {%lf, %lf, %lf}, {%lf, %lf, %lf}\n", a1, a2, a3, b1, b2, b3);
    return eq(a1, b1)? eq(a2, b2)? eq(a3, b3):eq(a2, b3)&&eq(a3, b2):eq(a1, b2)? eq(a2, b3)? eq(a3, b1):eq(a2, b1)&&eq(a3, b3):eq(a1, b3)&&(eq(a2, b1)? eq(a3, b2):eq(a2, b3)&&eq(a3, b2));
}

class vec
{
public:
    double x, y, z;
    vec() : x(0), y(0), z(0) {}
    vec(double nx, double ny, double nz) : x(nx), y(ny), z(nz) {}
    vec operator + (vec o)
    {
        return vec(x+o.x, y+o.y, z+o.z);
    }
    vec operator - (vec o)
    {
        return vec(x-o.x, y-o.y, z-o.z);
    }
    double operator * (vec o)
    {
        return x*o.x+y*o.y+z*o.z;
    }
    vec operator * (double o)
    {
        return vec(x*o, y*o, z*o);
    }
    vec operator ^ (vec o)
    {
        return vec(y*o.z-z*o.y, z*o.x-x*o.z, x*o.y-y*o.x);
    }
    double norm()
    {
        return sqrt(x*x+y*y+z*z);
    }
};

class vec2
{
public:
    double x, y;
    vec2() {}
    vec2(double nx, double ny) : x(nx), y(ny) {}
    vec2 operator + (vec2 o)
    {
        return vec2(x+o.x, y+o.y);
    }
    vec2 operator - (vec2 o)
    {
        return vec2(x-o.x, y-o.y);
    }
    double operator * (vec2 o)
    {
        return x*o.x+y*o.y;
    }
    vec2 operator * (double o)
    {
        return vec2(x*o, y*o);
    }
    vec2 operator ~ ()
    {
        return vec2(y, -x);
    }
    double norm()
    {
        return sqrt(x*x+y*y);
    }
};

vector<vec> cyclicperm(vector<vec> v)
{
    vector<vec> r;
    vector<vec>::iterator i;
    for(i = v.begin(); i!=v.end(); ++i)
    {
        r.push_back(*i);
        r.push_back(vec(i->y, i->z, i->x));
        r.push_back(vec(i->z, i->x, i->y));
    }
    return r;
}

vector<vec> altperm(vector<vec> v)
{
    vector<vec> r;
    vector<vec>::iterator i;
    for(i = v.begin(); i!=v.end(); ++i)
    {
        r.push_back(*i);
        r.push_back(vec(i->x, i->z, i->y));
    }
    return r;
}

vector<vec> signperm(vector<vec> v)
{
    vector<vec> r;
    vector<vec>::iterator i;
    for( i = v.begin(); i!=v.end(); ++i )
    {
        int j;
        for(j = 0; j<8; ++j)
            if(((j&1)||i->x)&&((j&2)||i->y)&&((j&4)||i->z))
                r.push_back(vec(j&1? i->x:-i->x, j&2? i->y:-i->y, j&4? i->z:-i->z));
    }
    return r;
}

vector<vec> mvvec(double x, double y, double z)
{
    vector<vec> v;
    v.push_back(vec(x, y, z));
    return v;
}

vector<vec> mvvec(vec q)
{
    vector<vec> v;
    v.push_back(q);
    return v;
}

vector<vec> concat(const vector<vec> a, const vector<vec> b)
{
    vector<vec> r;
    r = a;
    r.insert(r.end(), b.begin(), b.end());
    return r;
}

void printvvec(FILE *f, vector<vec> v)
{
    vector<vec>::iterator i;
    for(i = v.begin(); i!=v.end(); ++i)
        fprintf(f, tvertex, i->x, i->y, i->z);
}

void printvveclines(FILE *f, vector<vec> v, double len)
{
    vector<vec>::iterator i, j;
    len *= len;
    for(i = v.begin(); i!=v.end(); ++i)
        for(j = i+1; j!=v.end(); ++j)
            if(eq((*i-*j)*(*i-*j), len))
                fprintf(f, tline, i->x, i->y, i->z, j->x, j->y, j->z);
}

void printvveclines(FILE *f, vector<vec> v)
{
    vector<vec>::iterator i;
    for(i = v.begin(); i!=v.end(); i += 2)
        fprintf(f, tline, i->x, i->y, i->z, (i+1)->x, (i+1)->y, (i+1)->z);
}

void printvvecdottedlines(FILE *f, vector<vec> v)
{
    vector<vec>::iterator i;
    int n, m;
    double s;
    for(i = v.begin(); i!=v.end(); i += 2)
//    for(i = v.begin(); i!=v.begin()+12; i += 2)
    {
        s = (*i-*(i+1)).norm();
        m = (int)(s/0.04+.5);
        s = 1./(double)m;
        for(n = 1; n<m; ++n)
        {
            vec c = *i+(*(i+1)-*i)*(s*n);
            fprintf(f, tvertex, c.x, c.y, c.z);
        }
    }
}

void printvvectriangles(FILE *f, vector<vec> v, double len1, double len2, double len3)
{
    vector<vec>::iterator i, j, k;
    len1 *= len1;
    len2 *= len2;
    len3 *= len3;
    for(i = v.begin(); i!=v.end(); ++i)
        for(j = i+1; j!=v.end(); ++j)
            for(k = j+1; k!=v.end(); ++k)
                if(eqt((*i-*j)*(*i-*j), (*j-*k)*(*j-*k), (*k-*i)*(*k-*i), len1, len2, len3))
                    fprintf(f, ttriangle, i->x, i->y, i->z, j->x, j->y, j->z, k->x, k->y, k->z);
}

void printvvectriangles(FILE *f, vector<vec> v)
{
    vector<vec>::iterator i;
    for(i = v.begin(); i!=v.end(); i += 3)
//i = v.begin();
        fprintf(f, ttriangle, i->x, i->y, i->z, (i+1)->x, (i+1)->y, (i+1)->z, (i+2)->x, (i+2)->y, (i+2)->z);
/*i += 3;
        fprintf(f, ttriangle, i->x, i->y, i->z, (i+1)->x, (i+1)->y, (i+1)->z, (i+2)->x, (i+2)->y, (i+2)->z);
i += 3;
        fprintf(f, ttriangle, i->x, i->y, i->z, (i+1)->x, (i+1)->y, (i+1)->z, (i+2)->x, (i+2)->y, (i+2)->z);
i += 3;
        fprintf(f, ttriangle, i->x, i->y, i->z, (i+1)->x, (i+1)->y, (i+1)->z, (i+2)->x, (i+2)->y, (i+2)->z);
i += 3;
        fprintf(f, ttriangle, i->x, i->y, i->z, (i+1)->x, (i+1)->y, (i+1)->z, (i+2)->x, (i+2)->y, (i+2)->z);
i += 3;
        fprintf(f, ttriangle, i->x, i->y, i->z, (i+1)->x, (i+1)->y, (i+1)->z, (i+2)->x, (i+2)->y, (i+2)->z);
*/}

void SmallStellatedDodecahedron()
{
    vector<vec> v;
    v = cyclicperm(signperm(mvvec(vec(0, PHI, 1)*(1/sqrt(PHI+2)))));

    FILE *f;
    f = fopen("SmallStellatedDodecahedron.pov", "wb");
    fprintf(f, theader, 22491);
    printvvec(f, v);
    printvveclines(f, v, 2*PHI*(1/sqrt(PHI+2)));
    fprintf(f, tstartmesh);
    v = concat(v, cyclicperm(signperm(mvvec(vec(0, 2-PHI, 1)*(1/sqrt(PHI+2))))));
    v = concat(v, signperm(mvvec(vec(PHI-1, PHI-1, PHI-1)*(1/sqrt(PHI+2)))));
    printvvectriangles(f, v, (2*PHI-2)*(1/sqrt(PHI+2)), (2*PHI-2)*(1/sqrt(PHI+2)), (4-2*PHI)*(1/sqrt(PHI+2)));
    fprintf(f, tendmesh);
    fprintf(f, tfooter);
    fclose(f);
}

void GreatStellatedDodecahedron()
{
    vector<vec> v;
    v = concat(signperm(mvvec(vec(1, 1, 1)*(1/SQ3))), cyclicperm(signperm(mvvec(vec(0, PHI, 1/PHI)*(1/SQ3)))));

    FILE *f;
    f = fopen("GreatStellatedDodecahedron.pov", "wb");
    fprintf(f, theader, 7409);//7412);
    printvvec(f, v);
    printvveclines(f, v, 2*PHI*(1/SQ3));
    fprintf(f, tstartmesh);
    v = concat(v, cyclicperm(signperm(mvvec(vec(0, 2-PHI, PHI-1)*(1/SQ3)))));
    printvvectriangles(f, v, (2*PHI-2)*(1/SQ3), (2*PHI-2)*(1/SQ3), (4-2*PHI)*(1/SQ3));
    fprintf(f, tendmesh);
    fprintf(f, tfooter);
    fclose(f);
}

void GreatDodecahedron()
{
    vector<vec> v;
    v = cyclicperm(signperm(mvvec(vec(0, PHI, 1)*(1/sqrt(PHI+2)))));

    FILE *f;
    f = fopen("GreatDodecahedron.pov", "wb");
    fprintf(f, theader, 11404);
    printvveclines(f, v, 2*(1/sqrt(PHI+2)));
    v = concat(v, concat(signperm(mvvec(vec(PHI-1, PHI-1, PHI-1)*(1/sqrt(PHI+2)))), cyclicperm(signperm(mvvec(vec(0, 2-PHI, 1)*(1/sqrt(PHI+2)))))));
    printvvec(f, v);
    fprintf(f, tstartmesh);
    printvvectriangles(f, v, (2*PHI-2)*(1/sqrt(PHI+2)), (2*PHI-2)*(1/sqrt(PHI+2)), (2)*(1/sqrt(PHI+2)));
    fprintf(f, tendmesh);
    fprintf(f, tfooter);
    fclose(f);
}

vector<vec> IcosaParse(const char *vs)
{
    vector<vec> v, p;
    v = cyclicperm(signperm(mvvec(vec(0, PHI, 1))));
vec av;
    vector<vec>::iterator i, j, k;
    int q;
    static const vec2 rats[9] = {vec2(1, 0), vec2(PHI-1, 2-PHI), vec2(2-PHI, PHI-1), vec2(0, 1), vec2(0, PHI-1), vec2(0, 2-PHI), vec2(0, 0), vec2(2-PHI, 0), vec2(PHI-1, 0)};

    for(i = v.begin(); i!=v.end(); ++i)
        for(j = v.begin(); j!=v.end(); ++j)
            for(k = v.begin(); k!=v.end(); ++k)
                if(eqt((*i-*j).norm(), (*j-*k).norm(), (*k-*i).norm(), 2, 2, 2)&&(*i^*j)**k>0)
                {
                    vec t3 = *i*PHI*PHI+*j*PHI*PHI-*k*PHI*PHI*PHI, t1 = *j*PHI*PHI+*k*PHI*PHI-*i*PHI*PHI*PHI, t2 = *k*PHI*PHI+*i*PHI*PHI-*j*PHI*PHI*PHI;
                    for(q = 0; vs[q]; )
                    {
                        if(vs[q]<48)
                            break;
                        if(vs[q+1]<48)
                        {
                            p = concat(p, mvvec(t3+(t1-t3)*rats[vs[q]-'0'].x+(t2-t3)*rats[vs[q]-'0'].y));
                            q += 2;
                            continue;
                        }
                        if(vs[q+4]<48)
                        {
                            vec2 a = rats[vs[q]-'0'], b = rats[vs[q+1]-'0'], c = rats[vs[q+2]-'0'], d = rats[vs[q+3]-'0'];
                            double idet = 1/((a-b).x*(d-c).y-(a-b).y*(d-c).x);
//fprintf(stderr, "%lf, %lf    %lf, %lf         %lf\n", (a-b).x, (d-c).x, (a-b).y, (d-c).y, idet);
                            vec2 e = vec2(vec2((d-c).y, (d-c).x*-1)*(d-b), vec2((a-b).y*-1, (a-b).x)*(d-b))*idet;
                            vec2 r = (a-b)*e.x+b;
//fprintf(stderr, "%lf, %lf    %lf, %lf         %lf\n", r.x, r.y, t1.x, t1.y, idet);
//fprintf(stderr, "(a-b)={%lf, %lf}, x=%lf, b={%lf, %lf}, e={%lf, %lf}\n(c-d)={%lf, %lf}, y=%lf, d={%lf, %lf}, e={%lf, %lf}\n",
//(a-b).x, (a-b).y, e.x, b.x, b.y, ((a-b)*e.x+b).x, ((a-b)*e.x+b).y,
//(c-d).x, (c-d).y, e.y, d.x, d.y, ((c-d)*e.y+d).x, ((c-d)*e.y+d).y
//);
//fprintf(stderr, "%lf %lf\n", r.x, r.y);
                            p = concat(p, mvvec(t3+(t1-t3)*r.x+(t2-t3)*r.y));
                            av = av+(t3+(t1-t3)*r.x+(t2-t3)*r.y);
                            //p = concat(p, mvvec(vec()));
                            q += 5;
                            continue;
                        }
                        break;
                    }
                }

//printf("%lf %lf %lf\n", av.x, av.y, av.z);
    double r = 0;
    for(i = p.begin(); i!=p.end(); ++i)
//i = p.begin();
        if(r<i->norm())
            r = i->norm();

    for(i = p.begin(); i!=p.end(); ++i)
        *i = *i*(1/r);

    return p;
}

void StellatedIcosahedron(const char *fn, int rs, const char *vs, const char *ls, const char *dls, const char *ts)
{
    vector<vec> v;

    FILE *f;
    f = fopen(fn, "wb");
    fprintf(f, theader, rs);
    printvvec(f, IcosaParse(vs));
    printvvecdottedlines(f, IcosaParse(dls));
    printvveclines(f, IcosaParse(ls));
    fprintf(f, tstartmesh);
    printvvectriangles(f, IcosaParse(ts));
    fprintf(f, tendmesh);
    fprintf(f, tfooter);
    fclose(f);
}

int main()
{
    SmallStellatedDodecahedron();
    GreatStellatedDodecahedron();
    GreatDodecahedron();
    StellatedIcosahedron("GreatIcosahedron.pov", 31234, "0 1 2 0417 1428 2538 ", "0 3 ", "0 0417 0417 1 1 1428 1428 2 2 2538 2538 3 ", "0 1 0417 1 2 1428 2 3 2538 ");
    StellatedIcosahedron("CompoundOfFiveTetrahedra.pov", 22113, "2 2514 1427 2715 1528 ", "2 5 ", "2 2 2514 1427 1427 2715 2715 1528 ", "2 2514 1427 2 2715 1528 ");
    return 0;
}

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Datum in časSličicaVelikostUporabnikKomentar
trenutno21:15, 19. december 2005Sličica za različico z datumom 21:15, 19. december 2005853 × 794 (231 KB)wikimediacommons>CypReplacing missing pixels - cropped too small by one pixel on each edge.

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Pridobljeno iz »https://sl.wiki.beta.math.wmflabs.org/wiki/Slika:GreatStellatedDodecahedron.jpg«