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<vertex_v3f> &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)
    glVertex3fv ((GLfloat *)&i->p);

  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->p);

  update ();

  glNewList (list, GL_COMPILE);

  m->enable ();

#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->p);
    }

  glEnd ();
#else
  glEnableClientState (GL_VERTEX_ARRAY);
  glEnableClientState (GL_NORMAL_ARRAY);
  glEnableClientState (GL_TEXTURE_COORD_ARRAY);
  glVertexPointer (3, GL_FLOAT, sizeof (vertex_t2f_n3f_v3f), (void *)&v.begin ()->p);
  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);

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

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

  m->disable ();

  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)
{
  int n = min (100, max (15, (int)(ctx.pixfact * radius) / 10));

  GLUquadric *quad = gluNewQuadric ();
  gluQuadricTexture (quad, true);
  gluSphere (quad, radius, n, n);
  gluDeleteQuadric (quad);
}

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

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 ();
}

///////////////////////////////////////////////////////////////////////////
//
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:	1.50
Committed:	Fri Oct 29 15:58:50 2004 UTC (19 years, 7 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.49:	+2 -8 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	1.46	void geometry_opengl1d<type>::set (const vector<vertex_v3f> &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	root	1.46	glVertex3fv ((GLfloat *)&i->p);
61	root	1.2
62			glEnd ();
63			}
64
65			template<GLenum type>
66	root	1.46	void geometry_opengl2d<type>::set (const vector<vertex_t2f_n3f_v3f> &v)
67	root	1.2	{
68	root	1.24	bbox.reset ();
69
70	root	1.46	for (vector<vertex_t2f_n3f_v3f>::const_iterator i = v.end (); i-- != v.begin (); )
71	root	1.24	bbox.add (i->p);
72	root	1.26
73	root	1.28	update ();
74	root	1.24
75			glNewList (list, GL_COMPILE);
76	root	1.14
77	root	1.50	m->enable ();
78	root	1.15
79	root	1.20	#if 0
80	root	1.24	glBegin (type);
81
82	root	1.46	for (vector<vertex_t2f_n3f_v3f>::const_iterator i = v.begin (); i < v.end (); ++i)
83	root	1.24	{
84			glTexCoord2fv ((GLfloat *)&i->t);
85			glNormal3fv ((GLfloat *)&i->n);
86			glVertex3fv ((GLfloat *)&i->p);
87			}
88	root	1.4
89	root	1.24	glEnd ();
90	root	1.19	#else
91	root	1.24	glEnableClientState (GL_VERTEX_ARRAY);
92			glEnableClientState (GL_NORMAL_ARRAY);
93			glEnableClientState (GL_TEXTURE_COORD_ARRAY);
94	root	1.46	glVertexPointer (3, GL_FLOAT, sizeof (vertex_t2f_n3f_v3f), (void *)&v.begin ()->p);
95			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	1.19
98	root	1.24	glDrawArrays (type, 0, v.size ());
99	root	1.46
100			glDisableClientState (GL_VERTEX_ARRAY);
101			glDisableClientState (GL_NORMAL_ARRAY);
102			glDisableClientState (GL_TEXTURE_COORD_ARRAY);
103	root	1.19	#endif
104	root	1.22
105	root	1.50	m->disable ();
106	root	1.43
107	root	1.24	glEndList ();
108			}
109	root	1.2
110	root	1.24	template<GLenum type>
111	root	1.38	void geometry_opengl2d<type>::draw (view &ctx)
112	root	1.24	{
113	root	1.17	glCallList (list);
114	root	1.22	}
115
116	root	1.44	void geometry_sphere::update ()
117			{
118			bbox.reset ();
119			bbox.add (-point (radius, radius, radius));
120			bbox.add ( point (radius, radius, radius));
121
122			geometry::update ();
123			}
124
125			void geometry_sphere::draw (view &ctx)
126			{
127	root	1.48	int n = min (100, max (15, (int)(ctx.pixfact * radius) / 10));
128	root	1.44
129			GLUquadric *quad = gluNewQuadric ();
130			gluQuadricTexture (quad, true);
131			gluSphere (quad, radius, n, n);
132			gluDeleteQuadric (quad);
133			}
134
135	root	1.22	/////////////////////////////////////////////////////////////////////////////
136
137	root	1.38	void geometry_transform::update ()
138	root	1.22	{
139	root	1.38	const box &sub = g->bbox;
140	root	1.27
141			bbox.reset ();
142			bbox.add (m * vec3 (sub.a.x, sub.a.y, sub.a.z));
143			bbox.add (m * vec3 (sub.b.x, sub.a.y, sub.a.z));
144			bbox.add (m * vec3 (sub.a.x, sub.b.y, sub.a.z));
145			bbox.add (m * vec3 (sub.b.x, sub.b.y, sub.a.z));
146			bbox.add (m * vec3 (sub.a.x, sub.a.y, sub.b.z));
147			bbox.add (m * vec3 (sub.b.x, sub.a.y, sub.b.z));
148			bbox.add (m * vec3 (sub.a.x, sub.b.y, sub.b.z));
149			bbox.add (m * vec3 (sub.b.x, sub.b.y, sub.b.z));
150	root	1.22
151	root	1.38	geometry::update ();
152	root	1.28	}
153
154	root	1.38	#if 0
155			void geometry_transform::renormalize ()
156	root	1.28	{
157	root	1.34	point trans(m(0,3), m(1,3), m(2,3));
158			::renormalize (e->orig, trans);
159			m(0,3) = trans.x; m(1,3) = trans.y; m(2,3) = trans.z;
160	root	1.38	}
161	root	1.28	#endif
162
163	root	1.38	void geometry_transform::update (const matrix &xfrm)
164	root	1.28	{
165			m = m * xfrm;
166
167			update ();
168			}
169
170	root	1.38	void geometry_transform::set_matrix (const matrix &xfrm)
171	root	1.28	{
172			m = xfrm;
173
174			update ();
175	root	1.22	}
176
177	root	1.38	void geometry_transform::draw (view &ctx)
178	root	1.22	{
179	root	1.33	glPushMatrix ();
180			glMultMatrixf ((GLfloat *)&m);
181	root	1.38	g->draw (ctx);
182	root	1.33	glPopMatrix ();
183	root	1.2	}
184
185	root	1.38	void geometry_anim::draw (view &ctx)
186	root	1.23	{
187	root	1.30	matrix save_m = m;
188	root	1.23
189	root	1.30	update (matrix::rotation (vx * timer.now, vec3 (1, 0, 0))
190			* matrix::rotation (vy * timer.now, vec3 (0, 1, 0))
191			* matrix::rotation (vz * timer.now, vec3 (0, 0, 1)));
192	root	1.28
193	root	1.38	geometry_transform::draw (ctx);
194	root	1.23
195			m = save_m;
196	root	1.38	}
197
198			/////////////////////////////////////////////////////////////////////////////
199
200			void geometry_filter::set (geometry *g)
201			{
202			this->g = g;
203
204			if (g)
205			g->parent = this;
206
207			update ();
208			}
209
210			void geometry_filter::update ()
211			{
212			if (g)
213			{
214			bbox = g->bbox;
215			geometry::update ();
216			}
217			}
218
219			void geometry_filter::draw (view &ctx)
220			{
221			g->draw (ctx);
222			}
223
224			geometry_filter::~geometry_filter ()
225			{
226			delete g;
227			}
228
229			/////////////////////////////////////////////////////////////////////////////
230
231			void geometry_container::update ()
232			{
233			bbox.reset ();
234
235			for (iterator i = end (); i-- != begin (); )
236			bbox.add ((*i)->bbox);
237
238			geometry::update ();
239			}
240
241			void geometry_container::add (geometry *g)
242			{
243			push_back (g);
244			g->parent = this;
245
246			update ();
247			}
248
249			void geometry_container::draw (view &ctx)
250			{
251			for (iterator i = end (); i-- != begin (); )
252			(*i)->draw (ctx);
253			}
254
255			geometry_container::~geometry_container ()
256			{
257			for (iterator i = end (); i-- != begin (); )
258			delete *i;
259
260			clear ();
261			}
262
263			/////////////////////////////////////////////////////////////////////////////
264
265			entity::entity (geometry *g)
266	root	1.42	: geometry_filter(g)
267			, p(0,0,0)
268	root	1.38	{
269			update ();
270			}
271
272			entity::~entity ()
273			{
274			hide ();
275			}
276
277			void entity::move (const vec3 &v)
278			{
279			p = p + v;
280
281	root	1.49	renormalize (orig, p);
282	root	1.38
283			update ();
284	root	1.42	}
285
286			void entity::show ()
287			{
288			if (!o.size ())
289			world.add (this);
290	root	1.38	}
291
292			void entity::hide ()
293			{
294			for (vector<octant *>::iterator i = o.end (); i-- != o.begin (); )
295			(*i)->remove (this);
296
297			o.clear ();
298			}
299
300			void entity::update ()
301			{
302			if (!g)
303			return;
304
305			bbox = g->bbox;
306
307			a.x = orig.x + (soffs)floorf (bbox.a.x + p.x);
308			a.y = orig.y + (soffs)floorf (bbox.a.y + p.y);
309			a.z = orig.z + (soffs)floorf (bbox.a.z + p.z);
310			b.x = orig.x + (soffs)ceilf (bbox.b.x + p.x);
311			b.y = orig.y + (soffs)ceilf (bbox.b.y + p.y);
312			b.z = orig.z + (soffs)ceilf (bbox.b.z + p.z);
313
314			if (o.size ())
315			{
316			hide ();
317			show ();
318			}
319			}
320
321			void entity::draw (view &ctx)
322			{
323			sector diff = orig - ctx.orig;
324
325			glPushMatrix ();
326			glTranslatef (diff.x + p.x, diff.y + p.y, diff.z + p.z);
327			g->draw (ctx);
328			glPopMatrix ();
329			}
330
331	root	1.39	///////////////////////////////////////////////////////////////////////////
332	root	1.40	//
333	root	1.39	static void nurbs_error (GLenum errorCode)
334			{
335			const GLubyte *estring;
336			estring = gluErrorString(errorCode);
337			fprintf (stderr, "Nurbs error: %s\n", estring);
338			}
339	root	1.40
340	root	1.39	void errorCallback(GLenum errorCode)
341			{
342			const GLubyte *estring;
343
344			estring = gluErrorString(errorCode);
345			fprintf (stderr, "Tessellation Error: %s\n", estring);
346			exit (0);
347			}
348	root	1.41	void tcbBegin (GLenum prim)
349			{
350			glBegin (prim);
351			}
352			void tcbVertex (void *data)
353			{
354			glVertex3fv ((GLfloat *)data);
355			}
356			void tcbEnd ()
357			{
358			glEnd ();
359			}
360	root	1.39	void geometry_nurbs::set ()
361			{
362			// < XXX >: Testing CODE
363			int u, v;
364			for (u = 0; u < 4; u++) {
365			for (v = 0; v < 4; v++) {
366			ctlpoints[u][v][0] = 2.0*((GLfloat)u - 1.5);
367			ctlpoints[u][v][1] = 2.0*((GLfloat)v - 1.5);
368
369			if ( (u == 1 \|\| u == 2) && (v == 1 \|\| v == 2))
370			ctlpoints[u][v][2] = 3.0;
371			else
372			ctlpoints[u][v][2] = -3.0;
373			}
374			}
375	root	1.41	tess = gluNewTess();
376	root	1.39	// </ XXX >
377	root	1.1
378	root	1.39	glEnable(GL_AUTO_NORMAL);
379			nurb = gluNewNurbsRenderer ();
380	root	1.41	gluNurbsProperty (nurb, GLU_AUTO_LOAD_MATRIX, GL_FALSE);
381			gluNurbsProperty (nurb, GLU_DISPLAY_MODE, GLU_FILL);
382			gluNurbsProperty (nurb, GLU_NURBS_MODE, GLU_NURBS_TESSELLATOR);
383			gluNurbsProperty (nurb, GLU_SAMPLING_METHOD, GLU_OBJECT_PATH_LENGTH);
384			gluNurbsProperty (nurb, GLU_SAMPLING_TOLERANCE, 1.0);
385	root	1.39	gluNurbsCallback (nurb, GLU_ERROR, (GLvoid (*)()) nurbs_error);
386	root	1.41	gluNurbsCallback (nurb, GLU_NURBS_BEGIN, (GLvoid(*)()) tcbBegin);
387			gluNurbsCallback (nurb, GLU_NURBS_VERTEX,(GLvoid(*)()) tcbVertex);
388			gluNurbsCallback (nurb, GLU_NURBS_END, tcbEnd);
389	root	1.39	glDisable(GL_AUTO_NORMAL);
390	root	1.41
391	root	1.39	}
392	root	1.40
393	root	1.39	void geometry_nurbs::draw (view &ctx)
394			{
395			GLfloat knots[8] = {0.0, 0.0, 0.0, 0.0, 1.0, 1.0, 1.0, 1.0};
396
397			GLfloat mat_diffuse[] = { 0.7, 0.7, 0.7, 1.0 };
398			GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
399			GLfloat mat_shininess[] = { 100.0 };
400
401			glClearColor (0.0, 0.0, 0.0, 0.0);
402			glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
403			glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
404			glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);
405
406
407			glEnable(GL_AUTO_NORMAL);
408			gluBeginSurface (nurb);
409			gluNurbsSurface (nurb, 8, knots, 8, knots, 4 * 3, 3, &ctlpoints[0][0][0], 4, 4, GL_MAP2_VERTEX_3);
410	root	1.41	gluEndSurface (nurb);
411			/*
412			glEnable(GL_AUTO_NORMAL);
413			glPushMatrix();
414			GL_LG_DEBUG;
415			=======
416	root	1.39
417	root	1.40	gluEndSurface (nurb);
418	root	1.41	>>>>>>> 1.40
419	root	1.39	glDisable(GL_AUTO_NORMAL);
420	root	1.41	glPopMatrix();
421			glFlush();
422			*/
423	root	1.39	}