libgender/entity.C

#include <cassert>
#include <cstdlib>
#include <algorithm>

using namespace std;

#include "opengl.h"

#include "util.h"
#include "entity.h"
#include "oct.h"
#include "view.h"

/////////////////////////////////////////////////////////////////////////////

geometry::~geometry ()
{
}

template class geometry_opengl1d<GL_POINTS>;
template class geometry_opengl1d<GL_LINES>;
template class geometry_opengl1d<GL_LINE_STRIP>;
template class geometry_opengl1d<GL_LINE_LOOP>;
template class geometry_opengl2d<GL_TRIANGLES>;
template class geometry_opengl2d<GL_TRIANGLE_STRIP>;
template class geometry_opengl2d<GL_TRIANGLE_FAN>;
template class geometry_opengl2d<GL_QUADS>;
template class geometry_opengl2d<GL_QUAD_STRIP>;
template class geometry_opengl2d<GL_POLYGON>;

geometry_opengl::geometry_opengl ()
{
  list = glGenLists (1);
}

geometry_opengl::~geometry_opengl ()
{
  glDeleteLists (list, 1);
}

template<GLenum type>
void geometry_opengl1d<type>::set (const vector<vertex_v3f> &v)
{
  clear ();
  insert (end (), v.begin (), v.end ());

  bbox.reset ();

  for (const_iterator i = end (); i-- != begin (); )
    bbox.add (i->v);

  update ();
}

template<GLenum type>
void geometry_opengl1d<type>::draw (view &ctx)
{
  glBegin (type);

  for (iterator i = begin (); i < end (); ++i)
    glVertex3fv ((GLfloat *)&i->v);

  glEnd ();
}

template<GLenum type>
void geometry_opengl2d<type>::set (const vector<vertex_t2f_n3f_v3f> &v)
{
  bbox.reset ();

  for (vector<vertex_t2f_n3f_v3f>::const_iterator i = v.end (); i-- != v.begin (); )
    bbox.add (i->v);

  update ();

  glNewList (list, GL_COMPILE);

#if 0
  glBegin (type);
     
  for (vector<vertex_t2f_n3f_v3f>::const_iterator i = v.begin (); i < v.end (); ++i)
    {
      glTexCoord2fv ((GLfloat *)&i->t);
      glNormal3fv ((GLfloat *)&i->n);
      glVertex3fv ((GLfloat *)&i->v);
    }

  glEnd ();
#else
  glBindBufferARB (GL_ARRAY_BUFFER_ARB, 0);

  glEnableClientState (GL_VERTEX_ARRAY);
  glEnableClientState (GL_NORMAL_ARRAY);
  glEnableClientState (GL_TEXTURE_COORD_ARRAY);
  glNormalPointer (GL_FLOAT, sizeof (vertex_t2f_n3f_v3f), (void *)&v.begin ()->n);
  glTexCoordPointer (2, GL_FLOAT, sizeof (vertex_t2f_n3f_v3f), (void *)&v.begin ()->t);
  glVertexPointer (3, GL_FLOAT, sizeof (vertex_t2f_n3f_v3f), (void *)&v.begin ()->v);

  glDrawArrays (type, 0, v.size ());

  glDisableClientState (GL_VERTEX_ARRAY);
  glDisableClientState (GL_NORMAL_ARRAY);
  glDisableClientState (GL_TEXTURE_COORD_ARRAY);
#endif

  glEndList ();
}

template<GLenum type>
void geometry_opengl2d<type>::draw (view &ctx)
{
  m->enable (ctx);
  glCallList (list);
  m->disable (ctx);
}

void geometry_sphere::update ()
{
  bbox.reset ();
  bbox.add (-point (radius, radius, radius));
  bbox.add ( point (radius, radius, radius));

  geometry::update ();
}

void geometry_sphere::draw (view &ctx)
{
  int n = min (100, max (15, (int)(ctx.pixfact * radius) / 10));

  m->enable (ctx);
  GLUquadric *quad = gluNewQuadric ();
  gluQuadricTexture (quad, true);
  gluSphere (quad, radius, n, n);
  gluDeleteQuadric (quad);
  m->disable (ctx);
}

/////////////////////////////////////////////////////////////////////////////

void geometry_indexed_2d::draw (view &ctx)
{
  m->enable (ctx);
  vb.bind ();
  ib.draw (type, 0, ib.count);
  m->disable (ctx);
}

/////////////////////////////////////////////////////////////////////////////

void geometry_transform::update ()
{
  const box &sub = g->bbox;

  bbox.reset ();
  bbox.add (m * vec3 (sub.a.x, sub.a.y, sub.a.z));
  bbox.add (m * vec3 (sub.b.x, sub.a.y, sub.a.z));
  bbox.add (m * vec3 (sub.a.x, sub.b.y, sub.a.z));
  bbox.add (m * vec3 (sub.b.x, sub.b.y, sub.a.z));
  bbox.add (m * vec3 (sub.a.x, sub.a.y, sub.b.z));
  bbox.add (m * vec3 (sub.b.x, sub.a.y, sub.b.z));
  bbox.add (m * vec3 (sub.a.x, sub.b.y, sub.b.z));
  bbox.add (m * vec3 (sub.b.x, sub.b.y, sub.b.z));

  geometry::update ();
}

#if 0
void geometry_transform::renormalize ()
{
  point trans(m(0,3), m(1,3), m(2,3));
  ::renormalize (e->orig, trans);
  m(0,3) = trans.x; m(1,3) = trans.y; m(2,3) = trans.z;
}
#endif

void geometry_transform::update (const matrix &xfrm)
{
  m = m * xfrm;

  update ();
}

void geometry_transform::set_matrix (const matrix &xfrm)
{
  m = xfrm;

  update ();
}

void geometry_transform::draw (view &ctx)
{
  glPushMatrix ();
  glMultMatrixf ((GLfloat *)&m);
  g->draw (ctx);
  glPopMatrix ();
}

void geometry_anim::draw (view &ctx)
{
  matrix save_m = m;

  update (matrix::rotation (vx * timer.now, vec3 (1, 0, 0))
        * matrix::rotation (vy * timer.now, vec3 (0, 1, 0))
        * matrix::rotation (vz * timer.now, vec3 (0, 0, 1)));
  
  geometry_transform::draw (ctx);

  m = save_m;
}

/////////////////////////////////////////////////////////////////////////////

void geometry_filter::set (geometry *g)
{
  this->g = g;

  if (g)
    g->parent = this;

  update ();
}

void geometry_filter::update ()
{
  if (g)
    {
      bbox = g->bbox;
      geometry::update ();
    }
}

void geometry_filter::draw (view &ctx)
{
  g->draw (ctx);
}

geometry_filter::~geometry_filter ()
{
  delete g;
}

/////////////////////////////////////////////////////////////////////////////

void geometry_container::update ()
{
  bbox.reset ();

  for (iterator i = end (); i-- != begin (); )
    bbox.add ((*i)->bbox);

  geometry::update ();
}

void geometry_container::add (geometry *g)
{
  push_back (g);
  g->parent = this;
  
  update ();
}

void geometry_container::draw (view &ctx)
{
  for (iterator i = end (); i-- != begin (); )
    (*i)->draw (ctx);
}

geometry_container::~geometry_container ()
{
  for (iterator i = end (); i-- != begin (); )
    delete *i;
 
  clear ();
}

///////////////////////////////////////////////////////////////////////////

static void nurbs_error (GLenum errorCode)
{
  const GLubyte *estring;
  estring = gluErrorString(errorCode);
  fprintf (stderr, "Nurbs error: %s\n", estring);
}

void errorCallback(GLenum errorCode)
{
   const GLubyte *estring;

   estring = gluErrorString(errorCode);
   fprintf (stderr, "Tessellation Error: %s\n", estring);
   exit (0);
}

void tcbBegin (GLenum prim)
{
  glBegin (prim);
}

void tcbVertex (void *data)
{
  glVertex3fv ((GLfloat *)data);
}

void tcbEnd ()
{
  glEnd ();
}

void geometry_nurbs::set ()
{
  // < XXX >: Testing CODE
  int u, v;
  for (u = 0; u < 4; u++) {
    for (v = 0; v < 4; v++) {
      ctlpoints[u][v][0] = 2.0*((GLfloat)u - 1.5);
      ctlpoints[u][v][1] = 2.0*((GLfloat)v - 1.5);

      if ( (u == 1 || u == 2) && (v == 1 || v == 2))
        ctlpoints[u][v][2] = 3.0;
      else
        ctlpoints[u][v][2] = -3.0;
    }
  }                    
  tess = gluNewTess();
  // </ XXX >

  glEnable(GL_AUTO_NORMAL);
  nurb = gluNewNurbsRenderer ();
  gluNurbsProperty (nurb, GLU_AUTO_LOAD_MATRIX, GL_FALSE);
  gluNurbsProperty (nurb, GLU_DISPLAY_MODE, GLU_FILL);
  gluNurbsProperty (nurb, GLU_NURBS_MODE, GLU_NURBS_TESSELLATOR);
  gluNurbsProperty (nurb, GLU_SAMPLING_METHOD, GLU_OBJECT_PATH_LENGTH);
  gluNurbsProperty (nurb, GLU_SAMPLING_TOLERANCE, 1.0);
  gluNurbsCallback (nurb, GLU_ERROR, (GLvoid (*)()) nurbs_error);
  gluNurbsCallback (nurb, GLU_NURBS_BEGIN, (GLvoid(*)()) tcbBegin);
  gluNurbsCallback (nurb, GLU_NURBS_VERTEX,(GLvoid(*)()) tcbVertex);
  gluNurbsCallback (nurb, GLU_NURBS_END, tcbEnd);
  glDisable(GL_AUTO_NORMAL);

}

void geometry_nurbs::draw (view &ctx) 
{
  GLfloat knots[8] = {0.0, 0.0, 0.0, 0.0, 1.0, 1.0, 1.0, 1.0};

  GLfloat mat_diffuse[] = { 0.7, 0.7, 0.7, 1.0 };
  GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
  GLfloat mat_shininess[] = { 100.0 };

  glClearColor (0.0, 0.0, 0.0, 0.0);
  glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
  glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
  glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);


  glEnable(GL_AUTO_NORMAL);
  gluBeginSurface (nurb);
  gluNurbsSurface (nurb, 8, knots, 8, knots, 4 * 3, 3, &ctlpoints[0][0][0], 4, 4, GL_MAP2_VERTEX_3);
  gluEndSurface (nurb);
/*
  glEnable(GL_AUTO_NORMAL);
  glPushMatrix();
  GL_LG_DEBUG;
=======

  gluEndSurface (nurb);
>>>>>>> 1.40
  glDisable(GL_AUTO_NORMAL);
  glPopMatrix();
  glFlush();
*/
}

/////////////////////////////////////////////////////////////////////////////

entity::entity (geometry *g)
: geometry_filter(g)
, p(0,0,0)
{
  update ();
}

entity::~entity ()
{
  hide ();
}

visibility_base *entity::new_visibility ()
{
  return new entity_visibility (*this);
}

void entity::clear_visibility (visibility_base *vs)
{
  ((entity_visibility *)vs)->clear ();
}

void entity::move (const vec3 &v)
{
  p = p + v;

  renormalize (orig, p);

  update ();
}

void entity::show ()
{
  if (!o.size ())
    world.add (this);
}

void entity::hide ()
{
  for (vector<octant *>::iterator i = o.end (); i-- != o.begin (); )
    (*i)->remove (this);

  o.clear ();
}

void entity::update ()
{
  if (!g)
    return;

  bbox = g->bbox;

  a.x = orig.x + (soffs)floorf (bbox.a.x + p.x);
  a.y = orig.y + (soffs)floorf (bbox.a.y + p.y);
  a.z = orig.z + (soffs)floorf (bbox.a.z + p.z);
  b.x = orig.x + (soffs)ceilf  (bbox.b.x + p.x);
  b.y = orig.y + (soffs)ceilf  (bbox.b.y + p.y);
  b.z = orig.z + (soffs)ceilf  (bbox.b.z + p.z);

  if (o.size ())
    {
      hide ();
      show ();
    }
}

void entity::draw (view &ctx)
{
  ctx.eorig = orig - ctx.orig;

  glPushMatrix ();
  glTranslatef (p.x + ctx.eorig.x, p.y + ctx.eorig.y, p.z + ctx.eorig.z);
  g->draw (ctx);
  glPopMatrix ();
}

/////////////////////////////////////////////////////////////////////////////
//

#define SIZE 33

struct geometry_heightfield::node
{
  vertex_t2f_n3f_v3f vd[SIZE][SIZE];
  gl::vertex_buffer vb;
  GLushort *ibp;
  GLfloat hvar;
  GLfloat x, y, z, e;

  // 23
  // 01
  struct geometry_heightfield::node *sub[4];

  void update_normals ();
  void draw (view &ctx);

  node ();
};

geometry_heightfield::node::node ()
{
  sub[0] = sub[1] = sub[2] = sub[3] = 0;
  //vb.set (vd);
}

static index_buffer ib;
static GLushort *ibp;
static int icnt;

geometry_heightfield::geometry_heightfield (GLfloat sx, GLfloat sy)
: sx(sx), sy(sy)
, sm (max (sx, sy))
{
  if (!ib)
    {
      ib.set<GLushort> (SIZE * SIZE * 6, GL_STATIC_DRAW);
      ibp = (GLushort *)ib.map ();

      GLushort *p = ibp;

      for (int x = 0; x < SIZE - 1; x++)
        for (int y = 0; y < SIZE - 1; y++)
          {
            unsigned short a = (y + 0) * SIZE + (x + 0);
            unsigned short b = (y + 0) * SIZE + (x + 1);
            unsigned short c = (y + 1) * SIZE + (x + 1);
            unsigned short d = (y + 1) * SIZE + (x + 0);

            *p++ = c; *p++ = b; *p++ = a;
            *p++ = d; *p++ = c; *p++ = a;
          }

      icnt = p - ibp;

      ib.unmap ();
    }

  update ();

  tree = new node;
  tree->hvar = 0.01F * sx;
  tree->x = tree->y = 0.F;
  tree->e = sm;

  for (int x = 0; x < SIZE; x++)
    for (int y = 0; y < SIZE; y++)
      {
        vertex_t2f_n3f_v3f &v = tree->vd[y][x];

        v.t = tex2 ((GLfloat)x / (SIZE - 1), (GLfloat)y / (SIZE - 1));
        v.v = vec3 (sx * x / (SIZE - 1), tree->hvar * rand () / RAND_MAX, sy * y / (SIZE - 1));
        v.n = vec3 (0, 1, 0);
      }

  tree->update_normals ();

  tree->vb.set (&tree->vd[0][0], SIZE * SIZE);

  bbox.reset ();
  bbox.add (vec3 (0, 0, 0));
  bbox.add (vec3 (sx, tree->hvar, sy));
}

void geometry_heightfield::update ()
{
  geometry::update ();
}

static int maxcnt, thiscnt;
static GLfloat mine;

void geometry_heightfield::draw (view &ctx)
{
  testmat->enable (ctx);
  maxcnt = 10;
  thiscnt = 0;
  mine = 1e38;
  tree->draw (ctx);
  testmat->disable (ctx);
  //printf ("                                        TC %d mine %f\n", thiscnt, mine);
}

void geometry_heightfield::node::update_normals ()
{
  GLfloat az = 0.F;

  for (int x = 0; x < SIZE; x++)
    for (int y = 0; y < SIZE; y++)
      {
        vertex_t2f_n3f_v3f &v = vd[y][x];

        if (x && y)
          v.n = normalize (cross (vd[y-1][x].v - v.v, vd[y][x-1].v - v.v));

        az += v.v.y;
      }

  z = az / (SIZE * SIZE);
}

void geometry_heightfield::node::draw (view &ctx)
{
  vec3 center = vec3 (ctx.eorig) + vec3 (x + e * .5F, z, y + e * .5F);
  GLfloat d = length (center);

  if (!overlap (ctx.frustum.c, sphere (center, e * 2)))
    return;

  if (d > e * 2.F)
    {
      if (mine > e) mine = e; thiscnt++;
      vb.bind ();
      ib.draw (GL_TRIANGLES, 0, icnt);
    }
  else
    {
      for (int i = 0; i < 4; i++)
        {
          if (!sub[i])
            {
              if (!--maxcnt)
                {
                  vb.bind ();
                  ib.draw (GL_TRIANGLES, 0, icnt);
                }

              node *n = sub[i] = new node;

              n->hvar = hvar * 0.5;
              n->x = x + (i & 1 ? e * .5F : 0.F);
              n->y = y + (i & 2 ? e * .5F : 0.F);
              n->e = e * .5F;

              for (int x = 0; x < SIZE; x++)
                for (int y = 0; y < SIZE; y++)
                  n->vd[y][x] = vd[(y >> 1) + (i & 2 ? SIZE / 2 : 0)][(x >> 1) + (i & 1 ? SIZE / 2 : 0)];

              for (int x = 1; x < SIZE; x += 2)
                for (int y = 0; y < SIZE; y += 2)
                  {
                    n->vd[y][x].t = (n->vd[y][x-1].t + n->vd[y][x+1].t) * 0.5F;
                    n->vd[y][x].v = (n->vd[y][x-1].v + n->vd[y][x+1].v) * 0.5F;
                    if (y && y < SIZE - 1)
                      n->vd[y][x].v.y += n->hvar * (GLfloat)rand () / RAND_MAX - n->hvar * .5F;
                  }

              for (int x = 0; x < SIZE; x++)
                for (int y = 1; y < SIZE; y += 2)
                  {
                    n->vd[y][x].t = (n->vd[y-1][x].t + n->vd[y+1][x].t) * 0.5F;
                    n->vd[y][x].v = (n->vd[y-1][x].v + n->vd[y+1][x].v) * 0.5F;
                    if (x && x < SIZE - 1)
                      n->vd[y][x].v.y += n->hvar * (GLfloat)rand () / RAND_MAX - n->hvar * .5F;
                  }

              n->update_normals ();

              n->vb.set (&n->vd[0][0], SIZE * SIZE);
            }

          sub[i]->draw (ctx);
        }
    }
}

void
entity_moveable::perform_step (double t)
{
  vec3 vel = t * v;
  move (vel);
}

/////////////////////////////////////////////////////////////////////////////

skybox::skybox (
    const char *left,
    const char *front,
    const char *right,
    const char *back,
    const char *top,
    const char *bottom
)
{
  tex [0] = new texture (left  , texture::CLAMP);
  tex [1] = new texture (front , texture::CLAMP);
  tex [2] = new texture (right , texture::CLAMP);
  tex [3] = new texture (back  , texture::CLAMP);
  tex [4] = new texture (top   , texture::CLAMP);
  tex [5] = new texture (bottom, texture::CLAMP);
}

skybox::~skybox ()
{
  for (int i = 6; i--; )
    delete tex [i];
}

void
skybox::draw (view &ctx)
{

  float x = ctx.p.x;
  float y = ctx.p.y;
  float z = ctx.p.z;

  float width  = 1000.;
  float height = 1000.;
  float length = 1000.;

  x -= width  * .5F;
  y -= height * .5F;
  z -= length * .5F;

  static skybox_material sm;

  sm.enable (ctx);

  // Draw Left side
  sm.tex->name = tex [0]->name;
  sm.tex->enable ();
  glBegin (GL_QUADS);
    glTexCoord2f (1.0f, 0.0f); glVertex3f (x, y + height, z);
    glTexCoord2f (0.0f, 0.0f); glVertex3f (x, y + height, z + length);
    glTexCoord2f (0.0f, 1.0f); glVertex3f (x, y, z + length);
    glTexCoord2f (1.0f, 1.0f); glVertex3f (x, y, z);
  glEnd ();
  sm.tex->disable ();

  // Draw Front side
  sm.tex->name = tex [1]->name;
  sm.tex->enable ();
  glBegin (GL_QUADS);
    glTexCoord2f (1.0f, 1.0f); glVertex3f (x + width, y, z);
    glTexCoord2f (1.0f, 0.0f); glVertex3f (x + width, y + height, z);
    glTexCoord2f (0.0f, 0.0f); glVertex3f (x, y + height, z);
    glTexCoord2f (0.0f, 1.0f); glVertex3f (x, y, z);
  glEnd ();
  sm.tex->disable ();

  // Draw Right side
  sm.tex->name = tex [2]->name;
  sm.tex->enable ();
  glBegin (GL_QUADS);
    glTexCoord2f (0.0f, 1.0f); glVertex3f (x + width, y, z);
    glTexCoord2f (1.0f, 1.0f); glVertex3f (x + width, y, z + length);
    glTexCoord2f (1.0f, 0.0f); glVertex3f (x + width, y + height, z + length);
    glTexCoord2f (0.0f, 0.0f); glVertex3f (x + width, y + height, z);
  glEnd ();
  sm.tex->disable ();

  // Draw Back side
  sm.tex->name = tex [3]->name;
  sm.tex->enable ();
  glBegin (GL_QUADS);
    glTexCoord2f (1.0f, 1.0f); glVertex3f (x, y, z + length);
    glTexCoord2f (1.0f, 0.0f); glVertex3f (x, y + height, z + length);
    glTexCoord2f (0.0f, 0.0f); glVertex3f (x + width, y + height, z + length);
    glTexCoord2f (0.0f, 1.0f); glVertex3f (x + width, y, z + length);
  glEnd ();
  sm.tex->disable ();

  // Draw Up side
  sm.tex->name = tex [4]->name;
  sm.tex->enable ();
  glBegin (GL_QUADS);
    glTexCoord2f (1.0f, 0.0f); glVertex3f (x, y, z);
    glTexCoord2f (0.0f, 0.0f); glVertex3f (x, y, z + length);
    glTexCoord2f (0.0f, 1.0f); glVertex3f (x + width, y, z + length);
    glTexCoord2f (1.0f, 1.0f); glVertex3f (x + width, y, z);
  glEnd ();
  sm.tex->disable ();

  // Draw Down side
  sm.tex->name = tex [5]->name;
  sm.tex->enable ();
  glBegin (GL_QUADS);
    glTexCoord2f (1.0f, 0.0f); glVertex3f (x + width, y + height, z);
    glTexCoord2f (0.0f, 0.0f); glVertex3f (x + width, y + height, z + length);
    glTexCoord2f (0.0f, 1.0f); glVertex3f (x, y + height, z + length);
    glTexCoord2f (1.0f, 1.0f); glVertex3f (x, y + height, z);
  glEnd ();
  sm.tex->disable ();

  sm.disable (ctx);
}

Revision:	1.69
Committed:	Thu Aug 11 19:28:45 2005 UTC (18 years, 9 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.68:	+10 -0 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.54	#include <cassert>
2			#include <cstdlib>
3	root	1.1	#include <algorithm>
4
5			using namespace std;
6	root	1.42
7			#include "opengl.h"
8	root	1.1
9	root	1.28	#include "util.h"
10	root	1.1	#include "entity.h"
11	root	1.4	#include "oct.h"
12	root	1.13	#include "view.h"
13	root	1.1
14	root	1.21	/////////////////////////////////////////////////////////////////////////////
15
16	root	1.38	geometry::~geometry ()
17	root	1.1	{
18	root	1.2	}
19
20	root	1.38	template class geometry_opengl1d<GL_POINTS>;
21			template class geometry_opengl1d<GL_LINES>;
22			template class geometry_opengl1d<GL_LINE_STRIP>;
23			template class geometry_opengl1d<GL_LINE_LOOP>;
24			template class geometry_opengl2d<GL_TRIANGLES>;
25			template class geometry_opengl2d<GL_TRIANGLE_STRIP>;
26			template class geometry_opengl2d<GL_TRIANGLE_FAN>;
27			template class geometry_opengl2d<GL_QUADS>;
28			template class geometry_opengl2d<GL_QUAD_STRIP>;
29			template class geometry_opengl2d<GL_POLYGON>;
30	root	1.21
31	root	1.38	geometry_opengl::geometry_opengl ()
32	root	1.24	{
33			list = glGenLists (1);
34			}
35
36	root	1.38	geometry_opengl::~geometry_opengl ()
37	root	1.24	{
38			glDeleteLists (list, 1);
39			}
40
41	root	1.2	template<GLenum type>
42	root	1.46	void geometry_opengl1d<type>::set (const vector<vertex_v3f> &v)
43	root	1.2	{
44	root	1.38	clear ();
45			insert (end (), v.begin (), v.end ());
46
47	root	1.6	bbox.reset ();
48
49	root	1.38	for (const_iterator i = end (); i-- != begin (); )
50	root	1.54	bbox.add (i->v);
51	root	1.6
52	root	1.38	update ();
53	root	1.2	}
54
55			template<GLenum type>
56	root	1.38	void geometry_opengl1d<type>::draw (view &ctx)
57	root	1.2	{
58			glBegin (type);
59
60			for (iterator i = begin (); i < end (); ++i)
61	root	1.54	glVertex3fv ((GLfloat *)&i->v);
62	root	1.2
63			glEnd ();
64			}
65
66			template<GLenum type>
67	root	1.46	void geometry_opengl2d<type>::set (const vector<vertex_t2f_n3f_v3f> &v)
68	root	1.2	{
69	root	1.24	bbox.reset ();
70
71	root	1.46	for (vector<vertex_t2f_n3f_v3f>::const_iterator i = v.end (); i-- != v.begin (); )
72	root	1.54	bbox.add (i->v);
73	root	1.26
74	root	1.28	update ();
75	root	1.24
76			glNewList (list, GL_COMPILE);
77	root	1.14
78	root	1.20	#if 0
79	root	1.24	glBegin (type);
80
81	root	1.46	for (vector<vertex_t2f_n3f_v3f>::const_iterator i = v.begin (); i < v.end (); ++i)
82	root	1.24	{
83			glTexCoord2fv ((GLfloat *)&i->t);
84			glNormal3fv ((GLfloat *)&i->n);
85	root	1.54	glVertex3fv ((GLfloat *)&i->v);
86	root	1.24	}
87	root	1.4
88	root	1.24	glEnd ();
89	root	1.19	#else
90	root	1.65	glBindBufferARB (GL_ARRAY_BUFFER_ARB, 0);
91
92	root	1.24	glEnableClientState (GL_VERTEX_ARRAY);
93			glEnableClientState (GL_NORMAL_ARRAY);
94			glEnableClientState (GL_TEXTURE_COORD_ARRAY);
95	root	1.46	glNormalPointer (GL_FLOAT, sizeof (vertex_t2f_n3f_v3f), (void *)&v.begin ()->n);
96			glTexCoordPointer (2, GL_FLOAT, sizeof (vertex_t2f_n3f_v3f), (void *)&v.begin ()->t);
97	root	1.67	glVertexPointer (3, GL_FLOAT, sizeof (vertex_t2f_n3f_v3f), (void *)&v.begin ()->v);
98	root	1.19
99	root	1.24	glDrawArrays (type, 0, v.size ());
100	root	1.46
101			glDisableClientState (GL_VERTEX_ARRAY);
102			glDisableClientState (GL_NORMAL_ARRAY);
103			glDisableClientState (GL_TEXTURE_COORD_ARRAY);
104	root	1.19	#endif
105	root	1.22
106	root	1.24	glEndList ();
107			}
108	root	1.2
109	root	1.24	template<GLenum type>
110	root	1.38	void geometry_opengl2d<type>::draw (view &ctx)
111	root	1.24	{
112	root	1.51	m->enable (ctx);
113	root	1.17	glCallList (list);
114	root	1.51	m->disable (ctx);
115	root	1.22	}
116
117	root	1.44	void geometry_sphere::update ()
118			{
119			bbox.reset ();
120			bbox.add (-point (radius, radius, radius));
121			bbox.add ( point (radius, radius, radius));
122
123			geometry::update ();
124			}
125
126			void geometry_sphere::draw (view &ctx)
127			{
128	root	1.48	int n = min (100, max (15, (int)(ctx.pixfact * radius) / 10));
129	root	1.44
130	root	1.61	m->enable (ctx);
131	root	1.44	GLUquadric *quad = gluNewQuadric ();
132			gluQuadricTexture (quad, true);
133			gluSphere (quad, radius, n, n);
134			gluDeleteQuadric (quad);
135	root	1.61	m->disable (ctx);
136	root	1.44	}
137
138	root	1.22	/////////////////////////////////////////////////////////////////////////////
139
140	root	1.63	void geometry_indexed_2d::draw (view &ctx)
141			{
142			m->enable (ctx);
143			vb.bind ();
144			ib.draw (type, 0, ib.count);
145			m->disable (ctx);
146			}
147
148			/////////////////////////////////////////////////////////////////////////////
149
150	root	1.38	void geometry_transform::update ()
151	root	1.22	{
152	root	1.38	const box &sub = g->bbox;
153	root	1.27
154			bbox.reset ();
155			bbox.add (m * vec3 (sub.a.x, sub.a.y, sub.a.z));
156			bbox.add (m * vec3 (sub.b.x, sub.a.y, sub.a.z));
157			bbox.add (m * vec3 (sub.a.x, sub.b.y, sub.a.z));
158			bbox.add (m * vec3 (sub.b.x, sub.b.y, sub.a.z));
159			bbox.add (m * vec3 (sub.a.x, sub.a.y, sub.b.z));
160			bbox.add (m * vec3 (sub.b.x, sub.a.y, sub.b.z));
161			bbox.add (m * vec3 (sub.a.x, sub.b.y, sub.b.z));
162			bbox.add (m * vec3 (sub.b.x, sub.b.y, sub.b.z));
163	root	1.22
164	root	1.38	geometry::update ();
165	root	1.28	}
166
167	root	1.38	#if 0
168			void geometry_transform::renormalize ()
169	root	1.28	{
170	root	1.34	point trans(m(0,3), m(1,3), m(2,3));
171			::renormalize (e->orig, trans);
172			m(0,3) = trans.x; m(1,3) = trans.y; m(2,3) = trans.z;
173	root	1.38	}
174	root	1.28	#endif
175
176	root	1.38	void geometry_transform::update (const matrix &xfrm)
177	root	1.28	{
178			m = m * xfrm;
179
180			update ();
181			}
182
183	root	1.38	void geometry_transform::set_matrix (const matrix &xfrm)
184	root	1.28	{
185			m = xfrm;
186
187			update ();
188	root	1.22	}
189
190	root	1.38	void geometry_transform::draw (view &ctx)
191	root	1.22	{
192	root	1.33	glPushMatrix ();
193			glMultMatrixf ((GLfloat *)&m);
194	root	1.38	g->draw (ctx);
195	root	1.33	glPopMatrix ();
196	root	1.2	}
197
198	root	1.38	void geometry_anim::draw (view &ctx)
199	root	1.23	{
200	root	1.30	matrix save_m = m;
201	root	1.23
202	root	1.30	update (matrix::rotation (vx * timer.now, vec3 (1, 0, 0))
203			* matrix::rotation (vy * timer.now, vec3 (0, 1, 0))
204			* matrix::rotation (vz * timer.now, vec3 (0, 0, 1)));
205	root	1.28
206	root	1.38	geometry_transform::draw (ctx);
207	root	1.23
208			m = save_m;
209	root	1.38	}
210
211			/////////////////////////////////////////////////////////////////////////////
212
213			void geometry_filter::set (geometry *g)
214			{
215			this->g = g;
216
217			if (g)
218			g->parent = this;
219
220			update ();
221			}
222
223			void geometry_filter::update ()
224			{
225			if (g)
226			{
227			bbox = g->bbox;
228			geometry::update ();
229			}
230			}
231
232			void geometry_filter::draw (view &ctx)
233			{
234			g->draw (ctx);
235			}
236
237			geometry_filter::~geometry_filter ()
238			{
239			delete g;
240			}
241
242			/////////////////////////////////////////////////////////////////////////////
243
244			void geometry_container::update ()
245			{
246			bbox.reset ();
247
248			for (iterator i = end (); i-- != begin (); )
249			bbox.add ((*i)->bbox);
250
251			geometry::update ();
252			}
253
254			void geometry_container::add (geometry *g)
255			{
256			push_back (g);
257			g->parent = this;
258
259			update ();
260			}
261
262			void geometry_container::draw (view &ctx)
263			{
264			for (iterator i = end (); i-- != begin (); )
265			(*i)->draw (ctx);
266			}
267
268			geometry_container::~geometry_container ()
269			{
270			for (iterator i = end (); i-- != begin (); )
271			delete *i;
272
273			clear ();
274			}
275
276	root	1.52	///////////////////////////////////////////////////////////////////////////
277	root	1.38
278	root	1.39	static void nurbs_error (GLenum errorCode)
279			{
280			const GLubyte *estring;
281			estring = gluErrorString(errorCode);
282			fprintf (stderr, "Nurbs error: %s\n", estring);
283			}
284	root	1.40
285	root	1.39	void errorCallback(GLenum errorCode)
286			{
287			const GLubyte *estring;
288
289			estring = gluErrorString(errorCode);
290			fprintf (stderr, "Tessellation Error: %s\n", estring);
291			exit (0);
292			}
293	root	1.54
294	root	1.41	void tcbBegin (GLenum prim)
295			{
296			glBegin (prim);
297			}
298	root	1.54
299	root	1.41	void tcbVertex (void *data)
300			{
301			glVertex3fv ((GLfloat *)data);
302			}
303	root	1.54
304	root	1.41	void tcbEnd ()
305			{
306			glEnd ();
307			}
308	root	1.54
309	root	1.39	void geometry_nurbs::set ()
310			{
311			// < XXX >: Testing CODE
312			int u, v;
313			for (u = 0; u < 4; u++) {
314			for (v = 0; v < 4; v++) {
315			ctlpoints[u][v][0] = 2.0*((GLfloat)u - 1.5);
316			ctlpoints[u][v][1] = 2.0*((GLfloat)v - 1.5);
317
318			if ( (u == 1 \|\| u == 2) && (v == 1 \|\| v == 2))
319			ctlpoints[u][v][2] = 3.0;
320			else
321			ctlpoints[u][v][2] = -3.0;
322			}
323			}
324	root	1.41	tess = gluNewTess();
325	root	1.39	// </ XXX >
326	root	1.1
327	root	1.39	glEnable(GL_AUTO_NORMAL);
328			nurb = gluNewNurbsRenderer ();
329	root	1.41	gluNurbsProperty (nurb, GLU_AUTO_LOAD_MATRIX, GL_FALSE);
330			gluNurbsProperty (nurb, GLU_DISPLAY_MODE, GLU_FILL);
331			gluNurbsProperty (nurb, GLU_NURBS_MODE, GLU_NURBS_TESSELLATOR);
332			gluNurbsProperty (nurb, GLU_SAMPLING_METHOD, GLU_OBJECT_PATH_LENGTH);
333			gluNurbsProperty (nurb, GLU_SAMPLING_TOLERANCE, 1.0);
334	root	1.39	gluNurbsCallback (nurb, GLU_ERROR, (GLvoid (*)()) nurbs_error);
335	root	1.41	gluNurbsCallback (nurb, GLU_NURBS_BEGIN, (GLvoid(*)()) tcbBegin);
336			gluNurbsCallback (nurb, GLU_NURBS_VERTEX,(GLvoid(*)()) tcbVertex);
337			gluNurbsCallback (nurb, GLU_NURBS_END, tcbEnd);
338	root	1.39	glDisable(GL_AUTO_NORMAL);
339	root	1.41
340	root	1.39	}
341	root	1.40
342	root	1.39	void geometry_nurbs::draw (view &ctx)
343			{
344			GLfloat knots[8] = {0.0, 0.0, 0.0, 0.0, 1.0, 1.0, 1.0, 1.0};
345
346			GLfloat mat_diffuse[] = { 0.7, 0.7, 0.7, 1.0 };
347			GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
348			GLfloat mat_shininess[] = { 100.0 };
349
350			glClearColor (0.0, 0.0, 0.0, 0.0);
351			glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
352			glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
353			glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);
354
355
356			glEnable(GL_AUTO_NORMAL);
357			gluBeginSurface (nurb);
358			gluNurbsSurface (nurb, 8, knots, 8, knots, 4 * 3, 3, &ctlpoints[0][0][0], 4, 4, GL_MAP2_VERTEX_3);
359	root	1.41	gluEndSurface (nurb);
360			/*
361			glEnable(GL_AUTO_NORMAL);
362			glPushMatrix();
363			GL_LG_DEBUG;
364			=======
365	root	1.39
366	root	1.40	gluEndSurface (nurb);
367	root	1.41	>>>>>>> 1.40
368	root	1.39	glDisable(GL_AUTO_NORMAL);
369	root	1.41	glPopMatrix();
370			glFlush();
371			*/
372	root	1.39	}
373	root	1.52
374			/////////////////////////////////////////////////////////////////////////////
375
376			entity::entity (geometry *g)
377			: geometry_filter(g)
378			, p(0,0,0)
379			{
380			update ();
381			}
382
383			entity::~entity ()
384			{
385			hide ();
386			}
387
388	root	1.69	visibility_base *entity::new_visibility ()
389			{
390			return new entity_visibility (*this);
391			}
392
393			void entity::clear_visibility (visibility_base *vs)
394			{
395			((entity_visibility *)vs)->clear ();
396			}
397
398	root	1.52	void entity::move (const vec3 &v)
399			{
400			p = p + v;
401
402			renormalize (orig, p);
403
404			update ();
405			}
406
407			void entity::show ()
408			{
409			if (!o.size ())
410			world.add (this);
411			}
412
413			void entity::hide ()
414			{
415			for (vector<octant *>::iterator i = o.end (); i-- != o.begin (); )
416			(*i)->remove (this);
417
418			o.clear ();
419			}
420
421			void entity::update ()
422			{
423			if (!g)
424			return;
425
426			bbox = g->bbox;
427
428			a.x = orig.x + (soffs)floorf (bbox.a.x + p.x);
429			a.y = orig.y + (soffs)floorf (bbox.a.y + p.y);
430			a.z = orig.z + (soffs)floorf (bbox.a.z + p.z);
431			b.x = orig.x + (soffs)ceilf (bbox.b.x + p.x);
432			b.y = orig.y + (soffs)ceilf (bbox.b.y + p.y);
433			b.z = orig.z + (soffs)ceilf (bbox.b.z + p.z);
434
435			if (o.size ())
436			{
437			hide ();
438			show ();
439			}
440			}
441
442			void entity::draw (view &ctx)
443			{
444	root	1.57	ctx.eorig = orig - ctx.orig;
445	root	1.52
446			glPushMatrix ();
447	root	1.57	glTranslatef (p.x + ctx.eorig.x, p.y + ctx.eorig.y, p.z + ctx.eorig.z);
448	root	1.52	g->draw (ctx);
449			glPopMatrix ();
450			}
451
452			/////////////////////////////////////////////////////////////////////////////
453			//
454
455			#define SIZE 33
456
457			struct geometry_heightfield::node
458			{
459	root	1.54	vertex_t2f_n3f_v3f vd[SIZE][SIZE];
460	root	1.52	gl::vertex_buffer vb;
461	root	1.53	GLushort *ibp;
462	root	1.54	GLfloat hvar;
463	root	1.58	GLfloat x, y, z, e;
464	root	1.53
465	root	1.54	// 23
466			// 01
467			struct geometry_heightfield::node *sub[4];
468
469	root	1.56	void update_normals ();
470			void draw (view &ctx);
471
472	root	1.54	node ();
473	root	1.52	};
474	root	1.53
475	root	1.54	geometry_heightfield::node::node ()
476	root	1.53	{
477	root	1.54	sub[0] = sub[1] = sub[2] = sub[3] = 0;
478			//vb.set (vd);
479	root	1.53	}
480	root	1.52
481	root	1.54	static index_buffer ib;
482			static GLushort *ibp;
483			static int icnt;
484
485			geometry_heightfield::geometry_heightfield (GLfloat sx, GLfloat sy)
486	root	1.55	: sx(sx), sy(sy)
487			, sm (max (sx, sy))
488	root	1.52	{
489	root	1.54	if (!ib)
490			{
491	root	1.58	ib.set<GLushort> (SIZE * SIZE * 6, GL_STATIC_DRAW);
492	root	1.54	ibp = (GLushort *)ib.map ();
493
494			GLushort *p = ibp;
495
496			for (int x = 0; x < SIZE - 1; x++)
497			for (int y = 0; y < SIZE - 1; y++)
498			{
499			unsigned short a = (y + 0) * SIZE + (x + 0);
500			unsigned short b = (y + 0) * SIZE + (x + 1);
501			unsigned short c = (y + 1) * SIZE + (x + 1);
502			unsigned short d = (y + 1) * SIZE + (x + 0);
503
504			p++ = c; p++ = b; *p++ = a;
505			p++ = d; p++ = c; *p++ = a;
506			}
507
508			icnt = p - ibp;
509
510			ib.unmap ();
511			}
512
513	root	1.52	update ();
514	root	1.54
515			tree = new node;
516			tree->hvar = 0.01F * sx;
517			tree->x = tree->y = 0.F;
518	root	1.56	tree->e = sm;
519	root	1.54
520			for (int x = 0; x < SIZE; x++)
521			for (int y = 0; y < SIZE; y++)
522			{
523			vertex_t2f_n3f_v3f &v = tree->vd[y][x];
524
525			v.t = tex2 ((GLfloat)x / (SIZE - 1), (GLfloat)y / (SIZE - 1));
526			v.v = vec3 (sx * x / (SIZE - 1), tree->hvar * rand () / RAND_MAX, sy * y / (SIZE - 1));
527	root	1.58	v.n = vec3 (0, 1, 0);
528	root	1.54	}
529
530	root	1.56	tree->update_normals ();
531
532	root	1.54	tree->vb.set (&tree->vd[0][0], SIZE * SIZE);
533
534			bbox.reset ();
535			bbox.add (vec3 (0, 0, 0));
536			bbox.add (vec3 (sx, tree->hvar, sy));
537	root	1.52	}
538
539			void geometry_heightfield::update ()
540			{
541			geometry::update ();
542			}
543
544	root	1.58	static int maxcnt, thiscnt;
545			static GLfloat mine;
546	root	1.57
547	root	1.52	void geometry_heightfield::draw (view &ctx)
548			{
549	root	1.62	testmat->enable (ctx);
550	root	1.57	maxcnt = 10;
551	root	1.58	thiscnt = 0;
552			mine = 1e38;
553	root	1.56	tree->draw (ctx);
554	root	1.62	testmat->disable (ctx);
555	root	1.59	//printf (" TC %d mine %f\n", thiscnt, mine);
556	root	1.56	}
557
558			void geometry_heightfield::node::update_normals ()
559			{
560	root	1.58	GLfloat az = 0.F;
561
562	root	1.56	for (int x = 0; x < SIZE; x++)
563			for (int y = 0; y < SIZE; y++)
564			{
565			vertex_t2f_n3f_v3f &v = vd[y][x];
566
567			if (x && y)
568			v.n = normalize (cross (vd[y-1][x].v - v.v, vd[y][x-1].v - v.v));
569	root	1.58
570			az += v.v.y;
571	root	1.56	}
572	root	1.58
573			z = az / (SIZE * SIZE);
574	root	1.56	}
575
576			void geometry_heightfield::node::draw (view &ctx)
577			{
578	root	1.58	vec3 center = vec3 (ctx.eorig) + vec3 (x + e * .5F, z, y + e * .5F);
579			GLfloat d = length (center);
580	root	1.57
581			if (!overlap (ctx.frustum.c, sphere (center, e * 2)))
582			return;
583
584	root	1.58	if (d > e * 2.F)
585	root	1.55	{
586	root	1.58	if (mine > e) mine = e; thiscnt++;
587	root	1.56	vb.bind ();
588	root	1.55	ib.draw (GL_TRIANGLES, 0, icnt);
589	root	1.56	}
590			else
591			{
592			for (int i = 0; i < 4; i++)
593			{
594			if (!sub[i])
595			{
596	root	1.57	if (!--maxcnt)
597			{
598			vb.bind ();
599			ib.draw (GL_TRIANGLES, 0, icnt);
600			}
601
602	root	1.56	node *n = sub[i] = new node;
603
604	root	1.57	n->hvar = hvar * 0.5;
605	root	1.56	n->x = x + (i & 1 ? e * .5F : 0.F);
606			n->y = y + (i & 2 ? e * .5F : 0.F);
607			n->e = e * .5F;
608
609			for (int x = 0; x < SIZE; x++)
610			for (int y = 0; y < SIZE; y++)
611			n->vd[y][x] = vd[(y >> 1) + (i & 2 ? SIZE / 2 : 0)][(x >> 1) + (i & 1 ? SIZE / 2 : 0)];
612
613	root	1.58	for (int x = 1; x < SIZE; x += 2)
614			for (int y = 0; y < SIZE; y += 2)
615			{
616			n->vd[y][x].t = (n->vd[y][x-1].t + n->vd[y][x+1].t) * 0.5F;
617			n->vd[y][x].v = (n->vd[y][x-1].v + n->vd[y][x+1].v) * 0.5F;
618	root	1.60	if (y && y < SIZE - 1)
619			n->vd[y][x].v.y += n->hvar * (GLfloat)rand () / RAND_MAX - n->hvar * .5F;
620	root	1.58	}
621	root	1.57
622	root	1.58	for (int x = 0; x < SIZE; x++)
623			for (int y = 1; y < SIZE; y += 2)
624	root	1.56	{
625	root	1.58	n->vd[y][x].t = (n->vd[y-1][x].t + n->vd[y+1][x].t) * 0.5F;
626	root	1.57	n->vd[y][x].v = (n->vd[y-1][x].v + n->vd[y+1][x].v) * 0.5F;
627	root	1.60	if (x && x < SIZE - 1)
628			n->vd[y][x].v.y += n->hvar * (GLfloat)rand () / RAND_MAX - n->hvar * .5F;
629	root	1.56	}
630
631			n->update_normals ();
632
633			n->vb.set (&n->vd[0][0], SIZE * SIZE);
634			}
635
636			sub[i]->draw (ctx);
637			}
638	root	1.55	}
639	root	1.52	}
640
641	root	1.66	void
642			entity_moveable::perform_step (double t)
643			{
644			vec3 vel = t * v;
645			move (vel);
646			}
647	root	1.68
648			/////////////////////////////////////////////////////////////////////////////
649
650			skybox::skybox (
651			const char *left,
652			const char *front,
653			const char *right,
654			const char *back,
655			const char *top,
656			const char *bottom
657			)
658			{
659			tex [0] = new texture (left , texture::CLAMP);
660			tex [1] = new texture (front , texture::CLAMP);
661			tex [2] = new texture (right , texture::CLAMP);
662			tex [3] = new texture (back , texture::CLAMP);
663			tex [4] = new texture (top , texture::CLAMP);
664			tex [5] = new texture (bottom, texture::CLAMP);
665			}
666
667			skybox::~skybox ()
668			{
669			for (int i = 6; i--; )
670			delete tex [i];
671			}
672
673			void
674			skybox::draw (view &ctx)
675			{
676
677			float x = ctx.p.x;
678			float y = ctx.p.y;
679			float z = ctx.p.z;
680
681			float width = 1000.;
682			float height = 1000.;
683			float length = 1000.;
684
685			x -= width * .5F;
686			y -= height * .5F;
687			z -= length * .5F;
688
689			static skybox_material sm;
690
691			sm.enable (ctx);
692
693			// Draw Left side
694			sm.tex->name = tex [0]->name;
695			sm.tex->enable ();
696			glBegin (GL_QUADS);
697			glTexCoord2f (1.0f, 0.0f); glVertex3f (x, y + height, z);
698			glTexCoord2f (0.0f, 0.0f); glVertex3f (x, y + height, z + length);
699			glTexCoord2f (0.0f, 1.0f); glVertex3f (x, y, z + length);
700			glTexCoord2f (1.0f, 1.0f); glVertex3f (x, y, z);
701			glEnd ();
702			sm.tex->disable ();
703
704			// Draw Front side
705			sm.tex->name = tex [1]->name;
706			sm.tex->enable ();
707			glBegin (GL_QUADS);
708			glTexCoord2f (1.0f, 1.0f); glVertex3f (x + width, y, z);
709			glTexCoord2f (1.0f, 0.0f); glVertex3f (x + width, y + height, z);
710			glTexCoord2f (0.0f, 0.0f); glVertex3f (x, y + height, z);
711			glTexCoord2f (0.0f, 1.0f); glVertex3f (x, y, z);
712			glEnd ();
713			sm.tex->disable ();
714
715			// Draw Right side
716			sm.tex->name = tex [2]->name;
717			sm.tex->enable ();
718			glBegin (GL_QUADS);
719			glTexCoord2f (0.0f, 1.0f); glVertex3f (x + width, y, z);
720			glTexCoord2f (1.0f, 1.0f); glVertex3f (x + width, y, z + length);
721			glTexCoord2f (1.0f, 0.0f); glVertex3f (x + width, y + height, z + length);
722			glTexCoord2f (0.0f, 0.0f); glVertex3f (x + width, y + height, z);
723			glEnd ();
724			sm.tex->disable ();
725
726			// Draw Back side
727			sm.tex->name = tex [3]->name;
728			sm.tex->enable ();
729			glBegin (GL_QUADS);
730			glTexCoord2f (1.0f, 1.0f); glVertex3f (x, y, z + length);
731			glTexCoord2f (1.0f, 0.0f); glVertex3f (x, y + height, z + length);
732			glTexCoord2f (0.0f, 0.0f); glVertex3f (x + width, y + height, z + length);
733			glTexCoord2f (0.0f, 1.0f); glVertex3f (x + width, y, z + length);
734			glEnd ();
735			sm.tex->disable ();
736
737			// Draw Up side
738			sm.tex->name = tex [4]->name;
739			sm.tex->enable ();
740			glBegin (GL_QUADS);
741			glTexCoord2f (1.0f, 0.0f); glVertex3f (x, y, z);
742			glTexCoord2f (0.0f, 0.0f); glVertex3f (x, y, z + length);
743			glTexCoord2f (0.0f, 1.0f); glVertex3f (x + width, y, z + length);
744			glTexCoord2f (1.0f, 1.0f); glVertex3f (x + width, y, z);
745			glEnd ();
746			sm.tex->disable ();
747
748			// Draw Down side
749			sm.tex->name = tex [5]->name;
750			sm.tex->enable ();
751			glBegin (GL_QUADS);
752			glTexCoord2f (1.0f, 0.0f); glVertex3f (x + width, y + height, z);
753			glTexCoord2f (0.0f, 0.0f); glVertex3f (x + width, y + height, z + length);
754			glTexCoord2f (0.0f, 1.0f); glVertex3f (x, y + height, z + length);
755			glTexCoord2f (1.0f, 1.0f); glVertex3f (x, y + height, z);
756			glEnd ();
757			sm.tex->disable ();
758
759			sm.disable (ctx);
760			}
761