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 = z_near * tan (fov * (M_PI / 360.0));

  glFrustum (-ymax * aspect, ymax * aspect, -ymax, ymax, z_near, z_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);
  diagfact = sqrtf (3.);//D WHY???
  //printf ("diagfact = %f\n", diagfact);

  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.)));

  vislist.clear ();

  generation++;

  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 ();

  z_far = nz_far;
  c_far = nc_far;
  reset_projection ();

  nc_far = nz_far = z_near + 1.F;
  world.detect_visibility (*this);

  printf ("far %f cf %f RCP %f,%f,%f +%f\n", z_far, c_far,
      frustum.r.n.x,
      frustum.r.n.y,
      frustum.r.n.z,
      frustum.r.d
      );//D
}

void view::end ()
{
  vislist.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)
    {
      visibility_state &vs = vismap[*i];
      bool oq = (vs.visibility == visibility_state::PARTIAL
                 || vs.visibility == visibility_state::FULL)
                && (vs.last + 1. < timer.now)
                && (mode == LIGHTED);

      if (oq)
        begin_occ_query (**i);

      (*i)->display (*this);

      if (oq)
        end_occ_query ();

    }

  drawn.clear ();

  if (mode == view::DEPTH)
    {
      glEnable (GL_DEPTH_CLAMP_NV);
      glDepthMask (0);
      glDepthFunc (GL_LESS);
      if (mode == view::LIGHTED) glDepthFunc (GL_LEQUAL);
      glDisable (GL_LIGHTING);
      cgGLDisableProfile (vsh_profile);
      cgGLDisableProfile (fsh_profile);

#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 ();
       }

      glDisable (GL_DEPTH_CLAMP_NV);
      glDepthMask (1);
    }

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

}


Revision:	1.43
Committed:	Sun Oct 10 00:19:45 2004 UTC (19 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.42:	+4 -5 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 = z_near * tan (fov * (M_PI / 360.0));
82
83	glFrustum (-ymax * aspect, ymax * aspect, -ymax, ymax, z_near, z_far);
84
85	d = normalize (d);//D
86	u = normalize (u);//D
87
88	vec3 rz = -d;
89	vec3 rx = cross (u, rz);
90	vec3 ry = cross (rz, rx);
91
92	matrix &m = projection;
93	m(0,0) = rx.x; m(0,1) = rx.y; m(0,2) = rx.z; m(0,3) = 0;
94	m(1,0) = ry.x; m(1,1) = ry.y; m(1,2) = ry.z; m(1,3) = 0;
95	m(2,0) = rz.x; m(2,1) = rz.y; m(2,2) = rz.z; m(2,3) = 0;
96	m(3,0) = 0; m(3,1) = 0; m(3,2) = 0; m(3,3) = 1;
97
98	diagfact = abs (rz.x) + abs (rz.y) + abs (rz.z);
99	diagfact = sqrtf (3.);//D WHY???
100	//printf ("diagfact = %f\n", diagfact);
101
102	glMultMatrixf (m);
103	glTranslatef (-p.x, -p.y, -p.z);
104
105	glGetFloatv (GL_PROJECTION_MATRIX, m);
106
107	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) );
108	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) );
109	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) );
110	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) );
111	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) );
112	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) );
113
114	glMatrixMode (GL_MODELVIEW);
115	glLoadIdentity ();
116	}
117
118	void view::begin ()
119	{
120	glClear (GL_COLOR_BUFFER_BIT \| GL_DEPTH_BUFFER_BIT);
121	glDepthRange (0, 1. - (1. / pow (2., 16.)));
122
123	vislist.clear ();
124
125	generation++;
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	z_far = nz_far;
139	c_far = nc_far;
140	reset_projection ();
141
142	nc_far = nz_far = z_near + 1.F;
143	world.detect_visibility (*this);
144
145	printf ("far %f cf %f RCP %f,%f,%f +%f\n", z_far, c_far,
146	frustum.r.n.x,
147	frustum.r.n.y,
148	frustum.r.n.z,
149	frustum.r.d
150	);//D
151	}
152
153	void view::end ()
154	{
155	vislist.clear ();
156	}
157
158	void view::pass (enum mode m)
159	{
160	mode = m;
161
162	glDisable (GL_ALPHA_TEST);
163	glDisable (GL_BLEND);
164
165	if (mode == view::DEPTH)
166	{
167	glEnable (GL_POLYGON_OFFSET_FILL);
168	glPolygonOffset (0, 1);
169	glDepthFunc (GL_LESS);
170	glDisable (GL_LIGHTING);
171	glColorMask (0, 0, 0, 0);
172	cgGLDisableProfile (vsh_profile);// z-fighting??
173	cgGLDisableProfile (fsh_profile);
174	}
175	else
176	{
177	glEnable (GL_MINMAX);
178	glDisable (GL_POLYGON_OFFSET_FILL);
179	glDepthFunc (GL_LESS);
180	glDepthMask (1);
181	cgGLEnableProfile (vsh_profile);
182	cgGLEnableProfile (fsh_profile);
183	}
184
185	for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i)
186	{
187	visibility_state &vs = vismap[*i];
188	bool oq = (vs.visibility == visibility_state::PARTIAL
189	\|\| vs.visibility == visibility_state::FULL)
190	&& (vs.last + 1. < timer.now)
191	&& (mode == LIGHTED);
192
193	if (oq)
194	begin_occ_query (**i);
195
196	(i)->display (this);
197
198	if (oq)
199	end_occ_query ();
200
201	}
202
203	drawn.clear ();
204
205	if (mode == view::DEPTH)
206	{
207	glEnable (GL_DEPTH_CLAMP_NV);
208	glDepthMask (0);
209	glDepthFunc (GL_LESS);
210	if (mode == view::LIGHTED) glDepthFunc (GL_LEQUAL);
211	glDisable (GL_LIGHTING);
212	cgGLDisableProfile (vsh_profile);
213	cgGLDisableProfile (fsh_profile);
214
215	#if 0
216	static int count; count++;
217	if (farlist.size ())
218	printf ("%d: size %d\n", count, farlist.size ());
219	#endif
220
221	for (vector<octant *>::iterator i = farlist.begin (); i != farlist.end (); ++i)
222	{
223	if (mode == view::DEPTH) begin_occ_query (**i);
224	if (mode == view::LIGHTED) glColor3f ((((long)*i >> 6) & 15) / 31. + 0.5,0,0);
225	(i)->draw_bbox (this);
226	if (mode == view::DEPTH) end_occ_query ();
227	}
228
229	glDisable (GL_DEPTH_CLAMP_NV);
230	glDepthMask (1);
231	}
232
233	glColorMask (1, 1, 1, 0);
234	glDepthMask (1);
235
236	}
237
238