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iup-stack/iup/srcmglplot/src/obj.cpp

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stack iup library
2023-02-20 16:44:45 +00:00
/***************************************************************************
* obj.cpp is part of Math Graphic Library
* Copyright (C) 2007-2016 Alexey Balakin <mathgl.abalakin@gmail.ru> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Library General Public License as *
* published by the Free Software Foundation; either version 3 of the *
* License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU Library General Public *
* License along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include <time.h>
#include "mgl2/canvas.h"
#include "mgl2/canvas_cf.h"
#undef _GR_
#define _GR_ ((mglCanvas *)(*gr))
#define _Gr_ ((mglCanvas *)(gr))
int MGL_NO_EXPORT mgl_tga_save(const char *fname, int w, int h, unsigned char **p);
int MGL_NO_EXPORT mgl_pnga_save(const char *fname, int w, int h, unsigned char **p);
void MGL_NO_EXPORT mgl_printf(void *fp, bool gz, const char *str, ...);
//-----------------------------------------------------------------------------
#include <climits>
#include <cassert>
#include <float.h>
#include <math.h>
#include <deque>
#include <map>
#include <iostream>
/* Size prefixes for printf/scanf for size_t and ptrdiff_t */
#ifdef _MSC_VER
# define PRIuS "Iu" /* printf size_t */
# define PRIdS "Id" /* printf ptrdiff_t */
#else
# define PRIuS "zu" /* printf size_t */
# define PRIdS "zd" /* printf ptrdiff_t */
#endif
//-----------------------------------------------------------------------------
void mglTexture::GetRGBAOBJ(unsigned char *f) const
{
const size_t bw = 128; //border width
register size_t i,j,i0;
mglColor c1,c2,c;
for(i=0;i<256;i++)
{
c1 = col[2*i]; c2 = col[2*i+1];
for(j=0;j<512;j++)
{
i0 = 4*(j+512*(255-i));
if (j<bw)
c = c1;
else if (j>511-bw)
c = c2;
else
c = c1 + (c2-c1)*((j-bw)/(255.));
f[i0] = int(255*c.r);
f[i0+1] = int(255*c.g);
f[i0+2] = int(255*c.b);
f[i0+3] = int(255*c.a);
}
}
}
//-----------------------------------------------------------------------------
struct ObjUV
{
ObjUV() :
u(0.0), v(0.0) {}
ObjUV(mreal U, mreal V) :
u(U), v(V) {}
mreal u;
mreal v;
void Set(mreal U, mreal V)
{ u = U; v = V; }
bool operator==(const ObjUV &c) const
{
return u==c.u && v==c.v;
}
bool operator!=(const ObjUV &c) const
{
return !(u==c.u && v==c.v);
}
bool operator<(const ObjUV &c) const
{
if(u!=c.u)
return (u<c.u);
return (v<c.v);
}
friend std::ostream& operator << (std::ostream& out, const ObjUV& c)
{
out << "vt " << c.u << " " << c.v << "\n";
return out;
}
};
struct ObjUVs {
std::map<ObjUV,size_t> texturecoords;
FILE* const fp;
ObjUVs(FILE *f) : fp(f) {}
size_t addTextureCoords(mreal ta, mreal c, size_t ntxt)
{
const mreal gap = 1./512;
const mreal u = 0.25+0.5*(ta*(1-2*gap)+gap);
const mreal v = ((c-floor(c))*(1-2*gap) + gap + floor(c))/ntxt;
const ObjUV point(u, v);
std::map<ObjUV,size_t>::iterator pPoint = texturecoords.find(point);
if(pPoint!=texturecoords.end())
return pPoint->second;
else
{
const size_t point_index = texturecoords.size()+1;
texturecoords.insert(std::make_pair(point,point_index));
fprintf(fp,"vt %.15g %.15g\n",u,v);
return point_index;
}
}
};
class ObjXYZ
{
public :
mreal x;
mreal y;
mreal z;
ObjXYZ() :
x(0), y(0), z(0) {}
ObjXYZ(mreal fx, mreal fy, mreal fz) :
x(fx), y(fy), z(fz) {}
void Set(mreal fx, mreal fy, mreal fz)
{ x = fx; y = fy; z = fz; }
mreal Dot(const ObjXYZ & sPt) const
{ return(x*sPt.x)+(y*sPt.y)+(z*sPt.z); }
mreal LengthSquared()
{ return(x*x+y*y+z*z); }
friend ObjXYZ operator + (const ObjXYZ& a, const ObjXYZ& b)
{ return ObjXYZ(a.x+b.x,a.y+b.y,a.z+b.z); }
friend ObjXYZ operator - (const ObjXYZ& a)
{ return ObjXYZ(-a.x,-a.y,-a.z); }
friend ObjXYZ operator - (const ObjXYZ& a, const ObjXYZ& b)
{ return ObjXYZ(a.x-b.x,a.y-b.y,a.z-b.z); }
friend ObjXYZ operator * (const ObjXYZ& a, const mreal d)
{ return ObjXYZ(a.x*d,a.y*d,a.z*d); }
friend ObjXYZ operator * (const mreal d, const ObjXYZ& a)
{ return ObjXYZ(a.x*d,a.y*d,a.z*d); }
friend ObjXYZ operator / (const ObjXYZ& a, const mreal d)
{ return ObjXYZ(a.x/d,a.y/d,a.z/d); }
friend ObjXYZ operator * (const ObjXYZ& a, const ObjXYZ& b)
{ return ObjXYZ((a.y*b.z)-(a.z*b.y), (a.z*b.x)-(a.x*b.z), (a.x*b.y)-(a.y*b.x)); }
mreal Length()
{
return sqrt(x*x+y*y+z*z);
}
bool Normalize()
{
mreal fLength=Length();
if(fLength < FLT_EPSILON) return false;
mreal factor=1.0/fLength;
x *= factor;
y *= factor;
z *= factor;
return true;
}
bool operator==(const ObjXYZ &v) const
{
return x==v.x && y==v.y && z==v.z;
}
bool operator!=(const ObjXYZ &v) const
{
return !(x==v.x && y==v.y && z==v.z);
}
bool operator<(const ObjXYZ &v) const
{
if(x!=v.x)
return (x<v.x);
if(y!=v.y)
return (y<v.y);
return (z<v.z);
}
friend std::ostream& operator << (std::ostream& out, const ObjXYZ& v)
{
out << "v " << v.x << " " << v.y << " " << v.z << "\n";
return out;
}
};
struct ObjXYZs {
std::map<ObjXYZ,size_t> vertexcoords;
FILE* const fp;
ObjXYZs(FILE *f) : fp(f) {}
size_t addVertexCoords(mreal x, mreal y, mreal z)
{
const ObjXYZ point(x,y,z);
std::map<ObjXYZ,size_t>::iterator pPoint = vertexcoords.find(point);
if(pPoint!=vertexcoords.end())
return pPoint->second;
else
{
const size_t point_index = vertexcoords.size()+1;
vertexcoords.insert(std::make_pair(point,point_index));
fprintf(fp,"v %.15g %.15g %.15g\n",x,y,z);
return point_index;
}
}
};
struct ObjTriangle {
size_t p1, p2, p3;
size_t t1, t2, t3;
ObjTriangle() :
p1(0), p2(0), p3(0), t1(0), t2(0), t3(0) {}
ObjTriangle(size_t P1, size_t T1, size_t P2, size_t T2, size_t P3, size_t T3) :
p1(P1), p2(P2), p3(P3), t1(T1), t2(T2), t3(T3) {}
};
struct ObjLine {
size_t p1, p2;
ObjLine() :
p1(0), p2(0) {}
ObjLine(size_t P1, size_t P2) :
p1(P1), p2(P2) {}
};
struct ObjGroup {
std::deque<ObjTriangle> triangles;
mglColor commoncolor;
bool samecolor;
std::map<size_t, std::deque<ObjLine> > lines;
std::map<size_t, std::deque<size_t> > points;
FILE* const fp;
ObjXYZs &vertexcoords;
ObjGroup(FILE *f,ObjXYZs& v) : commoncolor(NC), samecolor(true), fp(f), vertexcoords(v) {}
// const HMGL gr;
// ObjGroup(const HMGL g) : samecolor(true), gr(g) {}
void addSegment(size_t m, size_t p1, size_t p2)
{
lines[m].push_back(ObjLine(p1,p2));
}
void addLines(size_t m, size_t n, const size_t* p)
{
for (size_t i=0; i<n-1; i++) {
lines[m].push_back(ObjLine(p[i],p[i+1]));
}
}
void addLines(size_t m, size_t n, const mreal P[][3])
{
if(n==0) return;
size_t *p=new size_t[n];
for (size_t i=0; i<n; i++) {
p[i] = vertexcoords.addVertexCoords(P[i][0], P[i][1], P[i][2]);
}
for (size_t i=0; i<n-1; i++) {
lines[m].push_back(ObjLine(p[i],p[i+1]));
}
delete []p;
}
void addPoint(size_t m, size_t p)
{
points[m].push_back(p);
}
void addTriangle(size_t p1, size_t t1, size_t p2, size_t t2, size_t p3, size_t t3)
{
triangles.push_back(ObjTriangle(p1,t1,p2,t2,p3,t3));
}
void addMonoTriangle(size_t t1, size_t p1, size_t p2, size_t p3)
{
triangles.push_back(ObjTriangle(p1,t1,p2,t1,p3,t1));
}
void addColourInfo(const mglPnt& p)
{
const mglColor color(p.r,p.g,p.b,p.a);
if (samecolor) {
if (commoncolor == NC) {
commoncolor = color;
} else {
if (commoncolor != color)
samecolor = false;
}
}
}
void writeLines() {
for(std::map<size_t, std::deque<ObjLine> >::const_iterator pm = lines.begin(); pm != lines.end(); pm++)
{
fprintf(fp,"usemtl Material%" PRIuS "\n", pm->first);
for(std::deque<ObjLine>::const_iterator pl = pm->second.begin(); pl != pm->second.end(); pl++)
fprintf(fp,"l %" PRIuS " %" PRIuS "\n", pl->p1, pl->p2);
}
}
void writePoints() {
for(std::map<size_t, std::deque<size_t> >::const_iterator pm = points.begin(); pm != points.end(); pm++)
{
fprintf(fp,"usemtl Material%" PRIuS "\n", pm->first);
for(std::deque<size_t>::const_iterator pp = pm->second.begin(); pp != pm->second.end(); pp++)
fprintf(fp,"p %" PRIuS "\n", *pp);
}
}
void writeTriangles() {
for(std::deque<ObjTriangle>::const_iterator pt = triangles.begin(); pt != triangles.end(); pt++)
fprintf(fp,"f %" PRIuS " %" PRIuS " %" PRIuS "\n", pt->p1, pt->p2, pt->p3);
}
void writeTexturedTriangles() {
for(std::deque<ObjTriangle>::const_iterator pt = triangles.begin(); pt != triangles.end(); pt++)
fprintf(fp,"f %" PRIuS "/%" PRIuS " %" PRIuS "/%" PRIuS " %" PRIuS "/%" PRIuS "\n", pt->p1,pt->t1, pt->p2,pt->t2, pt->p3,pt->t3);
}
};
struct lt_mglColor
{
bool operator()(const mglColor& c1, const mglColor& c2) const
{
if(c1.r!=c2.r)
return (c1.r<c2.r);
if(c1.g!=c2.g)
return (c1.g<c2.g);
if(c1.b!=c2.b)
return (c1.b<c2.b);
if(c1.a!=c2.a)
return (c1.a<c2.a);
return false;
}
};
typedef std::map<mglColor,size_t,lt_mglColor> colormap;
struct ObjMaterials {
colormap materialmap;
FILE* const fp;
ObjMaterials(FILE *f) : fp(f) {}
size_t addColor(const mglColor& color)
{
colormap::iterator pc = materialmap.find(color);
if(pc!=materialmap.end())
return pc->second;
else
{
const size_t color_index = materialmap.size();
materialmap.insert(std::make_pair(color,color_index));
fprintf(fp,"newmtl Material%" PRIuS "\n", color_index);
fprintf(fp,"Ka 0.1 0.1 0.1\n");
fprintf(fp,"Kd %g %g %g\n", color.r, color.g, color.b);
fprintf(fp,"Ks 0.0 0.0 0.0\n");
fprintf(fp,"d %g\nillum 2\nNs 15.0\n",color.a);
return color_index;
}
}
size_t addColor(mreal r, mreal g, mreal b, mreal a)
{
const mglColor color(r,g,b,a);
return addColor(color);
}
size_t addColorInfo(const mglPnt& p)
{
return addColor(p.r,p.g,p.b,p.a);
}
};
size_t MGL_LOCAL_CONST power_of_two(size_t input)
{
size_t value = 1;
while ( value < input ) value <<= 1;
return value;
}
void MGL_EXPORT mgl_write_obj(HMGL gr, const char *fname,const char *descr, int use_png)
{
if(gr->GetPrmNum()==0) return; // nothing to do
register size_t i,j;
{
long mmin=0,mmax=0,m;
for(i=0;i<gr->Grp.size();i++) // prepare array of indirect indexing
{ m = gr->Grp[i].Id; if(m<mmin) mmin=m; if(m>mmax) mmax=m; }
long *ng = new long[mmax-mmin+1];
for(i=0;i<gr->Grp.size();i++) ng[gr->Grp[i].Id-mmin] = i;
for(i=0;i<size_t(gr->GetPrmNum());i++) // collect data for groups
// it is rather expensive (extra 4b per primitive) but need for export to 3D
{
m = gr->GetPrm(i,false).id-mmin;
if(m>=0 && m<mmax-mmin+1) gr->Grp[ng[m]].p.push_back(i);
}
delete []ng;
}
const size_t len=strlen(fname);
const size_t ntxt=gr->GetTxtNum();
const size_t Ntxt=power_of_two(ntxt);
const size_t pntnum = gr->GetPntNum();
char *tname = new char[len+5]; strcpy(tname,fname);
FILE *fp=fopen(fname,"wt");
ObjXYZs vertexcoords(fp);
std::vector<size_t> vcs(pntnum); // vertex coord ids
ObjUVs texturecoords(fp);
std::vector<size_t> tcs(pntnum); // texture coord ids
// center point
mglPnt p0;
const mreal width = dynamic_cast<mglCanvas *>(gr)->GetWidth();
const mreal height = dynamic_cast<mglCanvas *>(gr)->GetHeight();
const mreal depth = sqrt(width*height);
p0.x = width/2.;
p0.y = height/2.;
p0.z = (1.f-sqrt(width*height)/(2*depth))*depth;
// vertices definition
fprintf(fp,"# Created by MathGL library\n# Title: %s\n",(descr && *descr) ? descr : fname);
for(i=0;i<pntnum;i++)
{
const mglPnt &pp = gr->GetPnt(i);
vcs[i] = vertexcoords.addVertexCoords(pp.x-p0.x, pp.y-p0.y, pp.z-p0.z);
tcs[i] = texturecoords.addTextureCoords(pp.ta, pp.c, Ntxt);
}
// prepare MTL file
tname[len-4]='.'; tname[len-3]='m'; tname[len-2]='t'; tname[len-1]='l';
FILE *fpmat=fopen(tname,"wt");
tname[len-4]='\0';
fprintf(fpmat,"newmtl Material\n");
fprintf(fpmat,"Ka 0.0 0.0 0.0\n");
fprintf(fpmat,"Kd 1.0 1.0 1.0\n");
fprintf(fpmat,"Ks 0.0 0.0 0.0\n");
fprintf(fpmat,"d 1.0\nillum 2\n");
if(use_png)
fprintf(fpmat,"map_Kd %s_txt.png\n",tname);
else
fprintf(fpmat,"map_Kd %s_txt.tga\n",tname);
if(use_png)
strcat(tname,"_txt.png");
else
strcat(tname,"_txt.tga");
// prepare texture file (TGA or PNG)
const size_t txtwidth = 512;
unsigned char *buf = new unsigned char[4*256*txtwidth*Ntxt];
unsigned char **pbuf= (unsigned char **)malloc(256*Ntxt*sizeof(unsigned char *));
for(i=0;i<256*Ntxt;i++) pbuf[i] = buf+4*txtwidth*i;
for(i=0;i<ntxt;i++) gr->GetTxt(i).GetRGBAOBJ(buf+(Ntxt-1-i)*256*txtwidth*4);
for(i=ntxt;i<Ntxt;i++)
{
unsigned char *f=buf+(Ntxt-1-i)*256*txtwidth*4;
const mglColor& c=BC;
for(size_t k=0;k<256;k++)
{
for(size_t l=0;l<txtwidth;l++)
{
*f++ = int(255*c.r);
*f++ = int(255*c.g);
*f++ = int(255*c.b);
*f++ = int(255*c.a);
}
}
}
if(use_png)
mgl_pnga_save(tname,txtwidth,256*Ntxt,pbuf);
else
mgl_tga_save(tname,txtwidth,256*Ntxt,pbuf);
free(pbuf);
delete []buf;
ObjMaterials materials(fpmat);
// primitive definition in groups
tname[len-4]='\0';
fprintf(fp,"# Primitives Definitions\nmtllib %s.mtl\n",tname);
for(i=0;i<gr->Grp.size();i++)
{
std::vector<long> &p = gr->Grp[i].p;
ObjGroup grp(fp, vertexcoords);
for(j=0;j<p.size();j++)
{
const mglPrim &q = gr->GetPrm(p[j],false);
register long n1=q.n1,n2=q.n2,n3=q.n3,n4=q.n4;
switch(q.type)
{
case 0:
if (gr->GetPnt(q.n1).a > mgl_min_a) {
const mglPnt p = gr->GetPnt(q.n1) - p0;
const mreal size = q.s;
const char type = q.n4;
mreal ss=size;
const mglColor c(p.r, p.g, p.b, p.a);
if(!strchr("xsSoO",type)) ss *= 1.1;
if(type=='.' || ss==0)
{
const size_t m = materials.addColor(c);
grp.addPoint(m, vcs[n1]);
}
else
switch(type)
{
case 'P':
{
const size_t m = materials.addColor(c);
const mreal P[5][3] =
{
{ p.x-ss,p.y-ss,p.z },
{ p.x+ss,p.y-ss,p.z },
{ p.x+ss,p.y+ss,p.z },
{ p.x-ss,p.y+ss,p.z },
{ p.x-ss,p.y-ss,p.z }
};
grp.addLines(m, 5, P);
}
case '+':
{
const size_t m = materials.addColor(c);
const mreal P1[2][3] =
{
{ p.x-ss,p.y,p.z },
{ p.x+ss,p.y,p.z }
};
grp.addLines(m, 2, P1);
const mreal P2[2][3] =
{
{ p.x,p.y-ss,p.z },
{ p.x,p.y+ss,p.z }
};
grp.addLines(m, 2, P2);
}
break;
case 'X':
{
const size_t m = materials.addColor(c);
const mreal P[5][3] =
{
{ p.x-ss,p.y-ss,p.z },
{ p.x+ss,p.y-ss,p.z },
{ p.x+ss,p.y+ss,p.z },
{ p.x-ss,p.y+ss,p.z },
{ p.x-ss,p.y-ss,p.z }
};
grp.addLines(m, 5, P);
const mreal P1[2][3] =
{
{ p.x-ss,p.y-ss,p.z },
{ p.x+ss,p.y+ss,p.z }
};
grp.addLines(m, 2, P1);
const mreal P2[2][3] =
{
{ p.x+ss,p.y-ss,p.z },
{ p.x-ss,p.y+ss,p.z }
};
grp.addLines(m, 2, P2);
}
break;
case 'x':
{
const size_t m = materials.addColor(c);
const mreal P1[2][3] =
{
{ p.x-ss,p.y-ss,p.z },
{ p.x+ss,p.y+ss,p.z }
};
grp.addLines(m, 2, P1);
const mreal P2[2][3] =
{
{ p.x+ss,p.y-ss,p.z },
{ p.x-ss,p.y+ss,p.z }
};
grp.addLines(m, 2, P2);
}
break;
case 'S':
{
const size_t ti = tcs[n1]; grp.addColourInfo(p);
const size_t pi1 = vertexcoords.addVertexCoords(p.x-ss,p.y-ss,p.z);
const size_t pi2 = vertexcoords.addVertexCoords(p.x+ss,p.y-ss,p.z);
const size_t pi3 = vertexcoords.addVertexCoords(p.x-ss,p.y+ss,p.z);
const size_t pi4 = vertexcoords.addVertexCoords(p.x+ss,p.y+ss,p.z);
grp.addTriangle(pi1, ti, pi2, ti, pi3, ti);
grp.addTriangle(pi4, ti, pi3, ti, pi2, ti);
}
break;
case 's':
{
const size_t m = materials.addColor(c);
const mreal P[5][3] =
{
{ p.x-ss,p.y-ss,p.z },
{ p.x+ss,p.y-ss,p.z },
{ p.x+ss,p.y+ss,p.z },
{ p.x-ss,p.y+ss,p.z },
{ p.x-ss,p.y-ss,p.z }
};
grp.addLines(m, 5, P);
}
break;
case 'D':
{
const size_t ti = tcs[n1]; grp.addColourInfo(p);
const size_t pi1 = vertexcoords.addVertexCoords(p.x,p.y-ss,p.z);
const size_t pi2 = vertexcoords.addVertexCoords(p.x+ss,p.y,p.z);
const size_t pi3 = vertexcoords.addVertexCoords(p.x-ss,p.y,p.z);
const size_t pi4 = vertexcoords.addVertexCoords(p.x,p.y+ss,p.z);
grp.addTriangle(pi1, ti, pi2, ti, pi3, ti);
grp.addTriangle(pi4, ti, pi3, ti, pi2, ti);
}
break;
case 'd':
{
const size_t m = materials.addColor(c);
const mreal P[5][3] =
{
{ p.x,p.y-ss,p.z },
{ p.x+ss,p.y,p.z },
{ p.x,p.y+ss,p.z },
{ p.x-ss,p.y,p.z },
{ p.x,p.y-ss,p.z }
};
grp.addLines(m, 5, P);
}
break;
case 'Y':
{
const size_t m = materials.addColor(c);
const mreal P1[3][3] =
{
{ p.x, p.y-ss, p.z },
{ p.x, p.y, p.z },
{ p.x+0.8*ss,p.y+0.6*ss,p.z }
};
grp.addLines(m, 3, P1);
const mreal P2[2][3] =
{
{ p.x, p.y, p.z },
{ p.x-0.8*ss,p.y+0.6*ss,p.z }
};
grp.addLines(m, 2, P2);
}
break;
case '*':
{
const size_t m = materials.addColor(c);
const mreal P1[2][3] =
{
{ p.x-ss,p.y,p.z },
{ p.x+ss,p.y,p.z }
};
grp.addLines(m, 2, P1);
const mreal P2[2][3] =
{
{ p.x-0.6*ss,p.y-0.8*ss,p.z },
{ p.x+0.6*ss,p.y+0.8*ss,p.z }
};
grp.addLines(m, 2, P2);
const mreal P3[2][3] =
{
{ p.x-0.6*ss,p.y+0.8*ss,p.z },
{ p.x+0.6*ss,p.y-0.8*ss,p.z }
};
grp.addLines(m, 2, P3);
}
break;
case 'T':
{
const size_t ti = tcs[n1]; grp.addColourInfo(p);
const size_t pi1 = vertexcoords.addVertexCoords(p.x-ss,p.y-ss/2,p.z);
const size_t pi2 = vertexcoords.addVertexCoords(p.x+ss,p.y-ss/2,p.z);
const size_t pi3 = vertexcoords.addVertexCoords(p.x,p.y+ss,p.z);
grp.addTriangle(pi1, ti, pi2, ti, pi3, ti);
}
break;
case '^':
{
const size_t m = materials.addColor(c);
const mreal P[4][3] =
{
{ p.x-ss,p.y-ss/2,p.z },
{ p.x+ss,p.y-ss/2,p.z },
{ p.x, p.y+ss, p.z },
{ p.x-ss,p.y-ss/2,p.z }
};
grp.addLines(m, 4, P);
}
break;
case 'V':
{
const size_t ti = tcs[n1]; grp.addColourInfo(p);
const size_t pi1 = vertexcoords.addVertexCoords(p.x-ss,p.y+ss/2,p.z);
const size_t pi2 = vertexcoords.addVertexCoords(p.x,p.y-ss,p.z);
const size_t pi3 = vertexcoords.addVertexCoords(p.x+ss,p.y+ss/2,p.z);
grp.addTriangle(pi1, ti, pi2, ti, pi3, ti);
}
break;
case 'v':
{
const size_t m = materials.addColor(c);
const mreal P[4][3] =
{
{ p.x-ss,p.y+ss/2,p.z },
{ p.x+ss,p.y+ss/2,p.z },
{ p.x, p.y-ss, p.z },
{ p.x-ss,p.y+ss/2,p.z }
};
grp.addLines(m, 4, P);
}
break;
case 'L':
{
const size_t ti = tcs[n1]; grp.addColourInfo(p);
const size_t pi1 = vertexcoords.addVertexCoords(p.x+ss/2,p.y+ss,p.z);
const size_t pi2 = vertexcoords.addVertexCoords(p.x-ss, p.y, p.z);
const size_t pi3 = vertexcoords.addVertexCoords(p.x+ss/2,p.y-ss,p.z);
grp.addTriangle(pi1, ti, pi2, ti, pi3, ti);
}
break;
case '<':
{
const size_t m = materials.addColor(c);
const mreal P[4][3] =
{
{ p.x+ss/2,p.y+ss,p.z },
{ p.x+ss/2,p.y-ss,p.z },
{ p.x-ss, p.y, p.z },
{ p.x+ss/2,p.y+ss,p.z }
};
grp.addLines(m, 4, P);
}
break;
case 'R':
{
const size_t ti = tcs[n1]; grp.addColourInfo(p);
const size_t pi1 = vertexcoords.addVertexCoords(p.x-ss/2,p.y+ss,p.z);
const size_t pi2 = vertexcoords.addVertexCoords(p.x-ss/2,p.y-ss,p.z);
const size_t pi3 = vertexcoords.addVertexCoords(p.x+ss, p.y, p.z);
grp.addTriangle(pi1, ti, pi2, ti, pi3, ti);
}
break;
case '>':
{
const size_t m = materials.addColor(c);
const mreal P[4][3] =
{
{ p.x-ss/2,p.y+ss,p.z },
{ p.x-ss/2,p.y-ss,p.z },
{ p.x+ss, p.y, p.z },
{ p.x-ss/2,p.y+ss,p.z }
};
grp.addLines(m, 4, P);
}
break;
case 'O':
{
const size_t ti = tcs[n1]; grp.addColourInfo(p);
const size_t cpi=vertexcoords.addVertexCoords(p.x, p.y, p.z);
size_t pnti[21];
for(size_t k=0;k<=20;k++)
pnti[k]=vertexcoords.addVertexCoords(p.x+ss*cos(k*M_PI/10),p.y+ss*sin(k*M_PI/10),p.z);
for(size_t k=0;k<20;k++) {
grp.addTriangle(pnti[k], ti, pnti[k+1], ti, cpi, ti);
}
}
break;
case 'C':
{
const size_t m = materials.addColor(c);
grp.addPoint(m, vcs[n1]);
}
case 'o':
{
const size_t m = materials.addColor(c);
mreal P[21][3];
for(size_t k=0;k<=20;k++) {
P[k][0] = p.x+ss*cos(k*M_PI/10);
P[k][1] = p.y+ss*sin(k*M_PI/10);
P[k][2] = p.z;
}
grp.addLines(m, 21, P);
}
break;
}
}
break;
case 1:
if (gr->GetPnt(q.n1).a > mgl_min_a || gr->GetPnt(q.n2).a > mgl_min_a) {
const mglPnt& p1 = gr->GetPnt(q.n1);
const mglPnt& p2 = gr->GetPnt(q.n2);
const size_t m = materials.addColor((p1.r+p2.r)/2, (p1.g+p2.g)/2, (p1.b+p2.b)/2, (p1.a+p2.a)/2);
grp.addSegment(m, vcs[n1], vcs[n2]);
}
break;
case 2:
if (gr->GetPnt(q.n1).a > mgl_min_a || gr->GetPnt(q.n2).a > mgl_min_a || gr->GetPnt(q.n3).a > mgl_min_a) {
grp.addTriangle(vcs[n1],tcs[n1], vcs[n2],tcs[n2], vcs[n3],tcs[n3]);
grp.addColourInfo(gr->GetPnt(n1));
grp.addColourInfo(gr->GetPnt(n2));
grp.addColourInfo(gr->GetPnt(n3));
}
break;
case 3:
if (gr->GetPnt(q.n1).a > mgl_min_a || gr->GetPnt(q.n2).a > mgl_min_a || gr->GetPnt(q.n3).a > mgl_min_a || gr->GetPnt(q.n4).a > mgl_min_a) {
grp.addTriangle(vcs[n1],tcs[n1], vcs[n2],tcs[n2], vcs[n3],tcs[n3]);
grp.addTriangle(vcs[n2],tcs[n2], vcs[n4],tcs[n4], vcs[n3],tcs[n3]);
grp.addColourInfo(gr->GetPnt(n1));
grp.addColourInfo(gr->GetPnt(n2));
grp.addColourInfo(gr->GetPnt(n3));
grp.addColourInfo(gr->GetPnt(n4));
}
break;
case 4:
{
const mglPnt p = gr->GetPnt(q.n1) - p0;
const mreal f = q.p/2, dx=p.u/2, dy=p.v/2;
const mreal c=q.s*cos(q.w*M_PI/180), s=-q.s*sin(q.w*M_PI/180);
const double b[4] = {c,-s, s,c};
long ik,il=0;
const mglGlyph &g = gr->GetGlf(q.n4);
const mreal dd = 0.004;
if(q.n3&8)
{
const size_t p_4 = vertexcoords.addVertexCoords(p.x+b[0]*dx+b[1]*(dy-dd),p.y+b[2]*dx+b[3]*(dy-dd),p.z);
const size_t p_3 = vertexcoords.addVertexCoords(p.x+b[0]*dx+b[1]*(dy+dd),p.y+b[2]*dx+b[3]*(dy+dd),p.z);
const size_t p_2 = vertexcoords.addVertexCoords(p.x+b[0]*(dx+f)+b[1]*(dy-dd),p.y+b[2]*dx+b[3]*(dy-dd),p.z);
const size_t p_1 = vertexcoords.addVertexCoords(p.x+b[0]*(dx+f)+b[1]*(dy+dd),p.y+b[2]*dx+b[3]*(dy+dd),p.z);
if(!(q.n3&4)) // glyph_line(p,f,true, d);
{
const size_t ti = tcs[n1]; grp.addColourInfo(p);
grp.addMonoTriangle(ti, p_1, p_3, p_2);
grp.addMonoTriangle(ti, p_4, p_2, p_3);
}
else // glyph_line(p,f,false, d);
{
const size_t m = materials.addColor(p.r, p.g, p.b, p.a);
grp.addSegment(m, p_1, p_2);
grp.addSegment(m, p_3, p_4);
grp.addSegment(m, p_1, p_3);
grp.addSegment(m, p_2, p_4);
}
}
else
{
if(!(q.n3&4)) // glyph_fill(p,f,g, d);
{
for(ik=0;ik<g.nt;ik++)
{
mreal x,y;
x = dx+f*g.trig[6*ik]; y = dy+f*g.trig[6*ik+1];
const size_t p_3 = vertexcoords.addVertexCoords(p.x+b[0]*x+b[1]*y,p.y+b[2]*x+b[3]*y,p.z);
x = dx+f*g.trig[6*ik+2]; y = dy+f*g.trig[6*ik+3];
const size_t p_2 = vertexcoords.addVertexCoords(p.x+b[0]*x+b[1]*y,p.y+b[2]*x+b[3]*y,p.z);
x = dx+f*g.trig[6*ik+4]; y = dy+f*g.trig[6*ik+5];
const size_t p_1 = vertexcoords.addVertexCoords(p.x+b[0]*x+b[1]*y,p.y+b[2]*x+b[3]*y,p.z);
const size_t ti = tcs[n1]; grp.addColourInfo(p);
grp.addMonoTriangle(ti, p_1, p_3, p_2);
}
}
else // glyph_wire(p,f,g, d);
{
const size_t m = materials.addColor(p.r, p.g, p.b, p.a);
for(ik=0;ik<g.nl;ik++)
{
mreal x,y;
x = g.line[2*ik]; y = g.line[2*ik+1];
if(x==0x3fff && y==0x3fff) // line breakthrough
{ il = ik+1; continue; }
else if(ik==g.nl-1 || (g.line[2*ik+2]==0x3fff && g.line[2*ik+3]==0x3fff))
{ // enclose the circle. May be in future this block should be commented
x = dx+f*g.line[2*ik]; y = dy+f*g.line[2*ik+1];
const size_t p_2 = vertexcoords.addVertexCoords(p.x+b[0]*x+b[1]*y,p.y+b[2]*x+b[3]*y,p.z);
x = dx+f*g.line[2*il]; y = dy+f*g.line[2*il+1];
const size_t p_1 = vertexcoords.addVertexCoords(p.x+b[0]*x+b[1]*y,p.y+b[2]*x+b[3]*y,p.z);
grp.addSegment(m, p_1, p_2);
}
else
{ // normal line
x = dx+f*g.line[2*ik]; y = dy+f*g.line[2*ik+1];
const size_t p_2 = vertexcoords.addVertexCoords(p.x+b[0]*x+b[1]*y,p.y+b[2]*x+b[3]*y,p.z);
x = dx+f*g.line[2*ik+2]; y = dy+f*g.line[2*ik+3];
const size_t p_1 = vertexcoords.addVertexCoords(p.x+b[0]*x+b[1]*y,p.y+b[2]*x+b[3]*y,p.z);
grp.addSegment(m, p_1, p_2);
}
}
}
}
}
break;
}
}
if (!grp.triangles.empty() || !grp.lines.empty() || !grp.points.empty())
fprintf(fp,"g %s\n",gr->Grp[i].Lbl.c_str());
if (!grp.triangles.empty()) {
if (grp.samecolor) {
fprintf(fp,"usemtl Material%" PRIuS "\n", materials.addColor(grp.commoncolor));
grp.writeTriangles();
} else {
fprintf(fp,"usemtl Material\n");
grp.writeTexturedTriangles();
}
}
grp.writeLines();
grp.writePoints();
gr->Grp[i].p.clear(); // we don't need indexes anymore
}
fclose(fp);
fclose(fpmat);
delete []tname;
}
void MGL_EXPORT mgl_write_obj_(uintptr_t *gr, const char *fname,const char *descr, int *use_png,int l,int n)
{ char *s=new char[l+1]; memcpy(s,fname,l); s[l]='\0';
char *d=new char[n+1]; memcpy(d,descr,n); d[n]='\0';
mgl_write_obj(_GR_,s,d,*use_png); delete []s; delete []d; }
//-----------------------------------------------------------------------------