libgender/entity.C

#include <algorithm>
#include <cassert>

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<vertex1d> &v)
{
  clear ();
  insert (end (), v.begin (), v.end ());

  bbox.reset ();

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

  update ();
}

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

  for (iterator i = begin (); i < end (); ++i)
    {
      glColor3fv ((GLfloat *)&i->c);
      glVertex3fv ((GLfloat *)&i->p);
    }

  glEnd ();
}

template<GLenum type>
void geometry_opengl2d<type>::set (const vector<vertex2d> &v)
{
  bbox.reset ();

  for (vector<vertex2d>::const_iterator i = v.end (); i-- != v.begin (); )
    bbox.add (i->p);

  update ();

  glNewList (list, GL_COMPILE);

  m->begin ();

#if 0
  glBegin (type);
     
  for (vector<vertex2d>::const_iterator i = v.begin (); i < v.end (); ++i)
    {
      glTexCoord2fv ((GLfloat *)&i->t);
      glNormal3fv ((GLfloat *)&i->n);
      glVertex3fv ((GLfloat *)&i->p);
    }

  glEnd ();
#else
  glEnableClientState (GL_VERTEX_ARRAY);
  glVertexPointer (3, GL_FLOAT, sizeof (vertex2d), (void *)&v.begin ()->p);
  glEnableClientState (GL_NORMAL_ARRAY);
  glNormalPointer (GL_FLOAT, sizeof (vertex2d), (void *)&v.begin ()->n);
  glEnableClientState (GL_TEXTURE_COORD_ARRAY);
  glTexCoordPointer (2, GL_FLOAT, sizeof (vertex2d), (void *)&v.begin ()->t);

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

  m->end ();

  glEndList ();
}

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

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)
{
  material *m = new simple_material;

  int n = max (8, (int)(ctx.pixfact * radius) / 10);

  m->begin ();
  GLUquadric *quad = gluNewQuadric ();
  gluQuadricTexture (quad, true);
  gluSphere (quad, radius, n, n);
  gluDeleteQuadric (quad);
  m->end ();

  delete m;
}

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

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 ();
}

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

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

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

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)
{
  sector diff = orig - ctx.orig;

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

void entity::display (view &ctx)
{
  if (ctx.may_draw (this))
    draw (ctx);
}

///////////////////////////////////////////////////////////////////////////
//
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();
*/
}
Revision:	1.45
Committed:	Mon Oct 11 15:26:34 2004 UTC (19 years, 7 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.44:	+1 -1 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#include <algorithm>
2	root	1.42	#include <cassert>
3	root	1.1
4			using namespace std;
5	root	1.42
6			#include "opengl.h"
7	root	1.1
8	root	1.28	#include "util.h"
9	root	1.1	#include "entity.h"
10	root	1.4	#include "oct.h"
11	root	1.13	#include "view.h"
12	root	1.1
13	root	1.21	/////////////////////////////////////////////////////////////////////////////
14
15	root	1.38	geometry::~geometry ()
16	root	1.1	{
17	root	1.2	}
18
19	root	1.38	template class geometry_opengl1d<GL_POINTS>;
20			template class geometry_opengl1d<GL_LINES>;
21			template class geometry_opengl1d<GL_LINE_STRIP>;
22			template class geometry_opengl1d<GL_LINE_LOOP>;
23			template class geometry_opengl2d<GL_TRIANGLES>;
24			template class geometry_opengl2d<GL_TRIANGLE_STRIP>;
25			template class geometry_opengl2d<GL_TRIANGLE_FAN>;
26			template class geometry_opengl2d<GL_QUADS>;
27			template class geometry_opengl2d<GL_QUAD_STRIP>;
28			template class geometry_opengl2d<GL_POLYGON>;
29	root	1.21
30	root	1.38	geometry_opengl::geometry_opengl ()
31	root	1.24	{
32			list = glGenLists (1);
33			}
34
35	root	1.38	geometry_opengl::~geometry_opengl ()
36	root	1.24	{
37			glDeleteLists (list, 1);
38			}
39
40	root	1.2	template<GLenum type>
41	root	1.38	void geometry_opengl1d<type>::set (const vector<vertex1d> &v)
42	root	1.2	{
43	root	1.38	clear ();
44			insert (end (), v.begin (), v.end ());
45
46	root	1.6	bbox.reset ();
47
48	root	1.38	for (const_iterator i = end (); i-- != begin (); )
49	root	1.6	bbox.add (i->p);
50
51	root	1.38	update ();
52	root	1.2	}
53
54			template<GLenum type>
55	root	1.38	void geometry_opengl1d<type>::draw (view &ctx)
56	root	1.2	{
57			glBegin (type);
58
59			for (iterator i = begin (); i < end (); ++i)
60			{
61	root	1.22	glColor3fv ((GLfloat *)&i->c);
62	root	1.2	glVertex3fv ((GLfloat *)&i->p);
63			}
64
65			glEnd ();
66			}
67
68			template<GLenum type>
69	root	1.38	void geometry_opengl2d<type>::set (const vector<vertex2d> &v)
70	root	1.2	{
71	root	1.24	bbox.reset ();
72
73			for (vector<vertex2d>::const_iterator i = v.end (); i-- != v.begin (); )
74			bbox.add (i->p);
75	root	1.26
76	root	1.28	update ();
77	root	1.24
78			glNewList (list, GL_COMPILE);
79	root	1.14
80	root	1.43	m->begin ();
81	root	1.15
82	root	1.20	#if 0
83	root	1.24	glBegin (type);
84
85	root	1.25	for (vector<vertex2d>::const_iterator i = v.begin (); i < v.end (); ++i)
86	root	1.24	{
87			glTexCoord2fv ((GLfloat *)&i->t);
88			glNormal3fv ((GLfloat *)&i->n);
89			glVertex3fv ((GLfloat *)&i->p);
90			}
91	root	1.4
92	root	1.24	glEnd ();
93	root	1.19	#else
94	root	1.24	glEnableClientState (GL_VERTEX_ARRAY);
95			glVertexPointer (3, GL_FLOAT, sizeof (vertex2d), (void *)&v.begin ()->p);
96			glEnableClientState (GL_NORMAL_ARRAY);
97			glNormalPointer (GL_FLOAT, sizeof (vertex2d), (void *)&v.begin ()->n);
98			glEnableClientState (GL_TEXTURE_COORD_ARRAY);
99			glTexCoordPointer (2, GL_FLOAT, sizeof (vertex2d), (void *)&v.begin ()->t);
100	root	1.19
101	root	1.24	glDrawArrays (type, 0, v.size ());
102	root	1.19	#endif
103	root	1.22
104	root	1.43	m->end ();
105
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	1.17	glCallList (list);
113	root	1.22	}
114
115	root	1.44	void geometry_sphere::update ()
116			{
117			bbox.reset ();
118			bbox.add (-point (radius, radius, radius));
119			bbox.add ( point (radius, radius, radius));
120
121			geometry::update ();
122			}
123
124			void geometry_sphere::draw (view &ctx)
125			{
126			material *m = new simple_material;
127
128	root	1.45	int n = max (8, (int)(ctx.pixfact * radius) / 10);
129	root	1.44
130			m->begin ();
131			GLUquadric *quad = gluNewQuadric ();
132			gluQuadricTexture (quad, true);
133			gluSphere (quad, radius, n, n);
134			gluDeleteQuadric (quad);
135			m->end ();
136
137			delete m;
138			}
139
140	root	1.22	/////////////////////////////////////////////////////////////////////////////
141
142	root	1.38	void geometry_transform::update ()
143	root	1.22	{
144	root	1.38	const box &sub = g->bbox;
145	root	1.27
146			bbox.reset ();
147			bbox.add (m * vec3 (sub.a.x, sub.a.y, sub.a.z));
148			bbox.add (m * vec3 (sub.b.x, sub.a.y, sub.a.z));
149			bbox.add (m * vec3 (sub.a.x, sub.b.y, sub.a.z));
150			bbox.add (m * vec3 (sub.b.x, sub.b.y, sub.a.z));
151			bbox.add (m * vec3 (sub.a.x, sub.a.y, sub.b.z));
152			bbox.add (m * vec3 (sub.b.x, sub.a.y, sub.b.z));
153			bbox.add (m * vec3 (sub.a.x, sub.b.y, sub.b.z));
154			bbox.add (m * vec3 (sub.b.x, sub.b.y, sub.b.z));
155	root	1.22
156	root	1.38	geometry::update ();
157	root	1.28	}
158
159	root	1.38	#if 0
160			void geometry_transform::renormalize ()
161	root	1.28	{
162	root	1.34	point trans(m(0,3), m(1,3), m(2,3));
163			::renormalize (e->orig, trans);
164			m(0,3) = trans.x; m(1,3) = trans.y; m(2,3) = trans.z;
165	root	1.38	}
166	root	1.28	#endif
167
168	root	1.38	void geometry_transform::update (const matrix &xfrm)
169	root	1.28	{
170			m = m * xfrm;
171
172			update ();
173			}
174
175	root	1.38	void geometry_transform::set_matrix (const matrix &xfrm)
176	root	1.28	{
177			m = xfrm;
178
179			update ();
180	root	1.22	}
181
182	root	1.38	void geometry_transform::draw (view &ctx)
183	root	1.22	{
184	root	1.33	glPushMatrix ();
185			glMultMatrixf ((GLfloat *)&m);
186	root	1.38	g->draw (ctx);
187	root	1.33	glPopMatrix ();
188	root	1.2	}
189
190	root	1.38	void geometry_anim::draw (view &ctx)
191	root	1.23	{
192	root	1.30	matrix save_m = m;
193	root	1.23
194	root	1.30	update (matrix::rotation (vx * timer.now, vec3 (1, 0, 0))
195			* matrix::rotation (vy * timer.now, vec3 (0, 1, 0))
196			* matrix::rotation (vz * timer.now, vec3 (0, 0, 1)));
197	root	1.28
198	root	1.38	geometry_transform::draw (ctx);
199	root	1.23
200			m = save_m;
201	root	1.38	}
202
203			/////////////////////////////////////////////////////////////////////////////
204
205			void geometry_filter::set (geometry *g)
206			{
207			this->g = g;
208
209			if (g)
210			g->parent = this;
211
212			update ();
213			}
214
215			void geometry_filter::update ()
216			{
217			if (g)
218			{
219			bbox = g->bbox;
220			geometry::update ();
221			}
222			}
223
224			void geometry_filter::draw (view &ctx)
225			{
226			g->draw (ctx);
227			}
228
229			geometry_filter::~geometry_filter ()
230			{
231			delete g;
232			}
233
234			/////////////////////////////////////////////////////////////////////////////
235
236			void geometry_container::update ()
237			{
238			bbox.reset ();
239
240			for (iterator i = end (); i-- != begin (); )
241			bbox.add ((*i)->bbox);
242
243			geometry::update ();
244			}
245
246			void geometry_container::add (geometry *g)
247			{
248			push_back (g);
249			g->parent = this;
250
251			update ();
252			}
253
254			void geometry_container::draw (view &ctx)
255			{
256			for (iterator i = end (); i-- != begin (); )
257			(*i)->draw (ctx);
258			}
259
260			geometry_container::~geometry_container ()
261			{
262			for (iterator i = end (); i-- != begin (); )
263			delete *i;
264
265			clear ();
266			}
267
268			/////////////////////////////////////////////////////////////////////////////
269
270			entity::entity (geometry *g)
271	root	1.42	: geometry_filter(g)
272			, p(0,0,0)
273	root	1.38	{
274			update ();
275			}
276
277			entity::~entity ()
278			{
279			hide ();
280			}
281
282			void entity::move (const vec3 &v)
283			{
284			p = p + v;
285
286			//renormalize (orig, p);
287
288			update ();
289	root	1.42	}
290
291			void entity::show ()
292			{
293			if (!o.size ())
294			world.add (this);
295	root	1.38	}
296
297			void entity::hide ()
298			{
299			for (vector<octant *>::iterator i = o.end (); i-- != o.begin (); )
300			(*i)->remove (this);
301
302			o.clear ();
303			}
304
305			void entity::update ()
306			{
307			if (!g)
308			return;
309
310			bbox = g->bbox;
311
312			a.x = orig.x + (soffs)floorf (bbox.a.x + p.x);
313			a.y = orig.y + (soffs)floorf (bbox.a.y + p.y);
314			a.z = orig.z + (soffs)floorf (bbox.a.z + p.z);
315			b.x = orig.x + (soffs)ceilf (bbox.b.x + p.x);
316			b.y = orig.y + (soffs)ceilf (bbox.b.y + p.y);
317			b.z = orig.z + (soffs)ceilf (bbox.b.z + p.z);
318
319			if (o.size ())
320			{
321			hide ();
322			show ();
323			}
324			}
325
326			void entity::draw (view &ctx)
327			{
328			sector diff = orig - ctx.orig;
329
330			glPushMatrix ();
331			glTranslatef (diff.x + p.x, diff.y + p.y, diff.z + p.z);
332			g->draw (ctx);
333			glPopMatrix ();
334			}
335
336			void entity::display (view &ctx)
337			{
338			if (ctx.may_draw (this))
339			draw (ctx);
340	root	1.23	}
341	root	1.1
342	root	1.39	///////////////////////////////////////////////////////////////////////////
343	root	1.40	//
344	root	1.39	static void nurbs_error (GLenum errorCode)
345			{
346			const GLubyte *estring;
347			estring = gluErrorString(errorCode);
348			fprintf (stderr, "Nurbs error: %s\n", estring);
349			}
350	root	1.40
351	root	1.39	void errorCallback(GLenum errorCode)
352			{
353			const GLubyte *estring;
354
355			estring = gluErrorString(errorCode);
356			fprintf (stderr, "Tessellation Error: %s\n", estring);
357			exit (0);
358			}
359	root	1.41	void tcbBegin (GLenum prim)
360			{
361			glBegin (prim);
362			}
363			void tcbVertex (void *data)
364			{
365			glVertex3fv ((GLfloat *)data);
366			}
367			void tcbEnd ()
368			{
369			glEnd ();
370			}
371	root	1.39	void geometry_nurbs::set ()
372			{
373			// < XXX >: Testing CODE
374			int u, v;
375			for (u = 0; u < 4; u++) {
376			for (v = 0; v < 4; v++) {
377			ctlpoints[u][v][0] = 2.0*((GLfloat)u - 1.5);
378			ctlpoints[u][v][1] = 2.0*((GLfloat)v - 1.5);
379
380			if ( (u == 1 \|\| u == 2) && (v == 1 \|\| v == 2))
381			ctlpoints[u][v][2] = 3.0;
382			else
383			ctlpoints[u][v][2] = -3.0;
384			}
385			}
386	root	1.41	tess = gluNewTess();
387	root	1.39	// </ XXX >
388	root	1.1
389	root	1.39	glEnable(GL_AUTO_NORMAL);
390			nurb = gluNewNurbsRenderer ();
391	root	1.41	gluNurbsProperty (nurb, GLU_AUTO_LOAD_MATRIX, GL_FALSE);
392			gluNurbsProperty (nurb, GLU_DISPLAY_MODE, GLU_FILL);
393			gluNurbsProperty (nurb, GLU_NURBS_MODE, GLU_NURBS_TESSELLATOR);
394			gluNurbsProperty (nurb, GLU_SAMPLING_METHOD, GLU_OBJECT_PATH_LENGTH);
395			gluNurbsProperty (nurb, GLU_SAMPLING_TOLERANCE, 1.0);
396	root	1.39	gluNurbsCallback (nurb, GLU_ERROR, (GLvoid (*)()) nurbs_error);
397	root	1.41	gluNurbsCallback (nurb, GLU_NURBS_BEGIN, (GLvoid(*)()) tcbBegin);
398			gluNurbsCallback (nurb, GLU_NURBS_VERTEX,(GLvoid(*)()) tcbVertex);
399			gluNurbsCallback (nurb, GLU_NURBS_END, tcbEnd);
400	root	1.39	glDisable(GL_AUTO_NORMAL);
401	root	1.41
402	root	1.39	}
403	root	1.40
404	root	1.39	void geometry_nurbs::draw (view &ctx)
405			{
406			GLfloat knots[8] = {0.0, 0.0, 0.0, 0.0, 1.0, 1.0, 1.0, 1.0};
407
408			GLfloat mat_diffuse[] = { 0.7, 0.7, 0.7, 1.0 };
409			GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
410			GLfloat mat_shininess[] = { 100.0 };
411
412			glClearColor (0.0, 0.0, 0.0, 0.0);
413			glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
414			glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
415			glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);
416
417
418			glEnable(GL_AUTO_NORMAL);
419			gluBeginSurface (nurb);
420			gluNurbsSurface (nurb, 8, knots, 8, knots, 4 * 3, 3, &ctlpoints[0][0][0], 4, 4, GL_MAP2_VERTEX_3);
421	root	1.41	gluEndSurface (nurb);
422			/*
423			glEnable(GL_AUTO_NORMAL);
424			glPushMatrix();
425			GL_LG_DEBUG;
426			=======
427	root	1.39
428	root	1.40	gluEndSurface (nurb);
429	root	1.41	>>>>>>> 1.40
430	root	1.39	glDisable(GL_AUTO_NORMAL);
431	root	1.41	glPopMatrix();
432			glFlush();
433			*/
434	root	1.39	}