libgender/view.C

#include <cmath>

#define GL_GLEXT_PROTOTYPES
#include <GL/gl.h>
#include <GL/glext.h>

#include "view.h"
#include "oct.h"

vector<GLuint> occ_query_objects;

static GLuint begin_occ_query ()
{
  GLuint id;

  if (occ_query_objects.size ())
    {
      id = *(occ_query_objects.end () - 1);
      occ_query_objects.pop_back ();
    }
  else
    glGenQueriesARB (1, &id);

  glBeginQueryARB (GL_SAMPLES_PASSED, id);
  return id;
}

inline void end_occ_query ()
{
  glEndQueryARB (GL_SAMPLES_PASSED);
}

static GLuint occ_query_result (GLuint id)
{
  GLuint count;

  glGetQueryObjectuivARB (id, GL_QUERY_RESULT, &count);
  occ_query_objects.push_back (id);

  return count;
}

view::view ()
: gamma(1.0)
{
}

view::~view ()
{
}

void view::begin_occ_query (recv_occ_query &recv)
{
  occ_queries.push_back (oq_data (&recv, ::begin_occ_query ()));
}

void view::end_occ_query ()
{
  ::end_occ_query ();
}

bool view::may_draw (const entity *e)
{
  if (drawn.find (e) != drawn.end ())
    return false;

  drawn.insert (e);
  return true;
}

void view::reset_projection ()
{
  //renormalize (orig, p);

  glViewport (0, 0, w, h);

  glMatrixMode (GL_PROJECTION);
  glLoadIdentity ();

  GLdouble aspect = (GLdouble)w/h;
  GLdouble ymax = near * tan (fov * (M_PI / 360.0));

  glFrustum (-ymax * aspect, ymax * aspect, -ymax, ymax, near, far);

  d = normalize (d);//D
  u = normalize (u);//D
  vec3 rz = -d;
  vec3 rx = cross (u, rz);
  vec3 ry = cross (rz, rx);

  matrix &m = projection;
  m(0,0) = rx.x; m(0,1) = rx.y; m(0,2) = rx.z; m(0,3) = 0;
  m(1,0) = ry.x; m(1,1) = ry.y; m(1,2) = ry.z; m(1,3) = 0;
  m(2,0) = rz.x; m(2,1) = rz.y; m(2,2) = rz.z; m(2,3) = 0;
  m(3,0) =    0; m(3,1) =    0; m(3,2) =    0; m(3,3) = 1;

  diagfact = abs (rz.x) + abs (rz.y) + abs (rz.z);

  glMultMatrixf (m);
  glTranslatef (-p.x, -p.y, -p.z);

  glGetFloatv (GL_PROJECTION_MATRIX, m);

  frustum.l = plane ( m(3,0) + m(0,0), m(3,1) + m(0,1), m(3,2) + m(0,2), m(3,3) + m(0,3) );
  frustum.r = plane ( m(3,0) - m(0,0), m(3,1) - m(0,1), m(3,2) - m(0,2), m(3,3) - m(0,3) );
  frustum.b = plane ( m(3,0) + m(1,0), m(3,1) + m(1,1), m(3,2) + m(1,2), m(3,3) + m(1,3) );
  frustum.t = plane ( m(3,0) - m(1,0), m(3,1) - m(1,1), m(3,2) - m(1,2), m(3,3) - m(1,3) );
  frustum.n = plane ( m(3,0) + m(2,0), m(3,1) + m(2,1), m(3,2) + m(2,2), m(3,3) + m(2,3) );
  frustum.f = plane ( m(3,0) - m(2,0), m(3,1) - m(2,1), m(3,2) - m(2,2), m(3,3) - m(2,3) );

  glMatrixMode (GL_MODELVIEW);
  glLoadIdentity ();
}

void view::begin ()
{
  glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  glDepthRange (0, 1. - (1. / pow (2., 16.)));

  vismap.clear ();
  vislist.clear ();

  generation++;

  reset_projection ();

  farlist.clear ();

  // check occlusion queries
  for (vector<oq_data>::iterator i = occ_queries.begin (); i != occ_queries.end (); ++i)
    {
      occ_query oq(*this, i->second, occ_query_result (i->second));
      i->first->event (oq);
    }

  occ_queries.clear ();

  nextfar = near;
  world.detect_visibility (*this);
  printf ("far %f nf %f RCP %f,%f,%f +%f\n", far, nextfar,
      frustum.r.n.x,
      frustum.r.n.y,
      frustum.r.n.z,
      frustum.r.d
      );//D
  far = nextfar;

  reset_projection ();
}

void view::end ()
{
  vismap.clear ();
}

void view::pass (enum mode m)
{
  mode = m;

  glDisable (GL_ALPHA_TEST);
  glDisable (GL_BLEND);

  if (mode == view::DEPTH)
    {
      glEnable (GL_POLYGON_OFFSET_FILL);
      glPolygonOffset (0, 1);
      glDepthFunc (GL_LESS);
      glDisable (GL_LIGHTING);
      glColorMask (0, 0, 0, 0);
      cgGLDisableProfile (vsh_profile);// z-fighting??
      cgGLDisableProfile (fsh_profile);
    }
  else
    {
      glEnable (GL_MINMAX);
      glDisable (GL_POLYGON_OFFSET_FILL);
      glDepthFunc (GL_LESS);
      glDepthMask (1);
      cgGLEnableProfile (vsh_profile);
      cgGLEnableProfile (fsh_profile);
    }
  
  for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i)
    (*i)->display (*this);

  drawn.clear ();

  if (mode == view::DEPTH || 1)
    {
      glEnable (GL_DEPTH_CLAMP_NV);
      glDepthFunc (GL_LESS);
      if (mode == view::LIGHTED) glDepthFunc (GL_LEQUAL);
      glDisable (GL_LIGHTING);
      cgGLDisableProfile (vsh_profile);
      cgGLDisableProfile (fsh_profile);
      //glShadeModel (GL_FLAT);

#if 0
      static int count; count++;
      if (farlist.size ())
        printf ("%d: size %d\n", count, farlist.size ());
#endif

      for (vector<octant *>::iterator i = farlist.begin (); i != farlist.end (); ++i)
        {
          if (mode == view::DEPTH) begin_occ_query (**i);
          if (mode == view::LIGHTED) glColor3f ((((long)*i >> 6) & 15) / 31. + 0.5,0,0);
          (*i)->draw_bbox (*this);
          if (mode == view::DEPTH) end_occ_query ();
       }

      glEnable (GL_DEPTH_TEST);
      glDisable (GL_DEPTH_CLAMP_NV);
      //glShadeModel (GL_SMOOTH);
    }

  glColorMask (1, 1, 1, 0);
  glDepthMask (1);

}


Revision:	1.38
Committed:	Sat Oct 9 21:25:18 2004 UTC (19 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.37:	+19 -9 lines
Log Message:	* empty log message *
#	Content
1	#include <cmath>
2
3	#define GL_GLEXT_PROTOTYPES
4	#include <GL/gl.h>
5	#include <GL/glext.h>
6
7	#include "view.h"
8	#include "oct.h"
9
10	vector<GLuint> occ_query_objects;
11
12	static GLuint begin_occ_query ()
13	{
14	GLuint id;
15
16	if (occ_query_objects.size ())
17	{
18	id = *(occ_query_objects.end () - 1);
19	occ_query_objects.pop_back ();
20	}
21	else
22	glGenQueriesARB (1, &id);
23
24	glBeginQueryARB (GL_SAMPLES_PASSED, id);
25	return id;
26	}
27
28	inline void end_occ_query ()
29	{
30	glEndQueryARB (GL_SAMPLES_PASSED);
31	}
32
33	static GLuint occ_query_result (GLuint id)
34	{
35	GLuint count;
36
37	glGetQueryObjectuivARB (id, GL_QUERY_RESULT, &count);
38	occ_query_objects.push_back (id);
39
40	return count;
41	}
42
43	view::view ()
44	: gamma(1.0)
45	{
46	}
47
48	view::~view ()
49	{
50	}
51
52	void view::begin_occ_query (recv_occ_query &recv)
53	{
54	occ_queries.push_back (oq_data (&recv, ::begin_occ_query ()));
55	}
56
57	void view::end_occ_query ()
58	{
59	::end_occ_query ();
60	}
61
62	bool view::may_draw (const entity *e)
63	{
64	if (drawn.find (e) != drawn.end ())
65	return false;
66
67	drawn.insert (e);
68	return true;
69	}
70
71	void view::reset_projection ()
72	{
73	//renormalize (orig, p);
74
75	glViewport (0, 0, w, h);
76
77	glMatrixMode (GL_PROJECTION);
78	glLoadIdentity ();
79
80	GLdouble aspect = (GLdouble)w/h;
81	GLdouble ymax = near * tan (fov * (M_PI / 360.0));
82
83	glFrustum (-ymax * aspect, ymax * aspect, -ymax, ymax, near, far);
84
85	d = normalize (d);//D
86	u = normalize (u);//D
87	vec3 rz = -d;
88	vec3 rx = cross (u, rz);
89	vec3 ry = cross (rz, rx);
90
91	matrix &m = projection;
92	m(0,0) = rx.x; m(0,1) = rx.y; m(0,2) = rx.z; m(0,3) = 0;
93	m(1,0) = ry.x; m(1,1) = ry.y; m(1,2) = ry.z; m(1,3) = 0;
94	m(2,0) = rz.x; m(2,1) = rz.y; m(2,2) = rz.z; m(2,3) = 0;
95	m(3,0) = 0; m(3,1) = 0; m(3,2) = 0; m(3,3) = 1;
96
97	diagfact = abs (rz.x) + abs (rz.y) + abs (rz.z);
98
99	glMultMatrixf (m);
100	glTranslatef (-p.x, -p.y, -p.z);
101
102	glGetFloatv (GL_PROJECTION_MATRIX, m);
103
104	frustum.l = plane ( m(3,0) + m(0,0), m(3,1) + m(0,1), m(3,2) + m(0,2), m(3,3) + m(0,3) );
105	frustum.r = plane ( m(3,0) - m(0,0), m(3,1) - m(0,1), m(3,2) - m(0,2), m(3,3) - m(0,3) );
106	frustum.b = plane ( m(3,0) + m(1,0), m(3,1) + m(1,1), m(3,2) + m(1,2), m(3,3) + m(1,3) );
107	frustum.t = plane ( m(3,0) - m(1,0), m(3,1) - m(1,1), m(3,2) - m(1,2), m(3,3) - m(1,3) );
108	frustum.n = plane ( m(3,0) + m(2,0), m(3,1) + m(2,1), m(3,2) + m(2,2), m(3,3) + m(2,3) );
109	frustum.f = plane ( m(3,0) - m(2,0), m(3,1) - m(2,1), m(3,2) - m(2,2), m(3,3) - m(2,3) );
110
111	glMatrixMode (GL_MODELVIEW);
112	glLoadIdentity ();
113	}
114
115	void view::begin ()
116	{
117	glClear (GL_COLOR_BUFFER_BIT \| GL_DEPTH_BUFFER_BIT);
118	glDepthRange (0, 1. - (1. / pow (2., 16.)));
119
120	vismap.clear ();
121	vislist.clear ();
122
123	generation++;
124
125	reset_projection ();
126
127	farlist.clear ();
128
129	// check occlusion queries
130	for (vector<oq_data>::iterator i = occ_queries.begin (); i != occ_queries.end (); ++i)
131	{
132	occ_query oq(*this, i->second, occ_query_result (i->second));
133	i->first->event (oq);
134	}
135
136	occ_queries.clear ();
137
138	nextfar = near;
139	world.detect_visibility (*this);
140	printf ("far %f nf %f RCP %f,%f,%f +%f\n", far, nextfar,
141	frustum.r.n.x,
142	frustum.r.n.y,
143	frustum.r.n.z,
144	frustum.r.d
145	);//D
146	far = nextfar;
147
148	reset_projection ();
149	}
150
151	void view::end ()
152	{
153	vismap.clear ();
154	}
155
156	void view::pass (enum mode m)
157	{
158	mode = m;
159
160	glDisable (GL_ALPHA_TEST);
161	glDisable (GL_BLEND);
162
163	if (mode == view::DEPTH)
164	{
165	glEnable (GL_POLYGON_OFFSET_FILL);
166	glPolygonOffset (0, 1);
167	glDepthFunc (GL_LESS);
168	glDisable (GL_LIGHTING);
169	glColorMask (0, 0, 0, 0);
170	cgGLDisableProfile (vsh_profile);// z-fighting??
171	cgGLDisableProfile (fsh_profile);
172	}
173	else
174	{
175	glEnable (GL_MINMAX);
176	glDisable (GL_POLYGON_OFFSET_FILL);
177	glDepthFunc (GL_LESS);
178	glDepthMask (1);
179	cgGLEnableProfile (vsh_profile);
180	cgGLEnableProfile (fsh_profile);
181	}
182
183	for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i)
184	(i)->display (this);
185
186	drawn.clear ();
187
188	if (mode == view::DEPTH \|\| 1)
189	{
190	glEnable (GL_DEPTH_CLAMP_NV);
191	glDepthFunc (GL_LESS);
192	if (mode == view::LIGHTED) glDepthFunc (GL_LEQUAL);
193	glDisable (GL_LIGHTING);
194	cgGLDisableProfile (vsh_profile);
195	cgGLDisableProfile (fsh_profile);
196	//glShadeModel (GL_FLAT);
197
198	#if 0
199	static int count; count++;
200	if (farlist.size ())
201	printf ("%d: size %d\n", count, farlist.size ());
202	#endif
203
204	for (vector<octant *>::iterator i = farlist.begin (); i != farlist.end (); ++i)
205	{
206	if (mode == view::DEPTH) begin_occ_query (**i);
207	if (mode == view::LIGHTED) glColor3f ((((long)*i >> 6) & 15) / 31. + 0.5,0,0);
208	(i)->draw_bbox (this);
209	if (mode == view::DEPTH) end_occ_query ();
210	}
211
212	glEnable (GL_DEPTH_TEST);
213	glDisable (GL_DEPTH_CLAMP_NV);
214	//glShadeModel (GL_SMOOTH);
215	}
216
217	glColorMask (1, 1, 1, 0);
218	glDepthMask (1);
219
220	}
221
222