libgender/view.C

#include <cmath>

#include "opengl.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 = mode == LIGHTED
                && vs.last + 1. < timer.now
                && (vs.visibility == visibility_state::PARTIAL
                    || vs.visibility == visibility_state::FULL);

      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);
      glColorMask (0, 0, 0, 0);
      glDepthFunc (GL_LESS);
      if (mode == view::LIGHTED) glDepthFunc (GL_LEQUAL);
      if (mode == view::LIGHTED) glColorMask (1, 1, 1, 0);
      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:	1.45
Committed:	Sun Oct 10 14:15:16 2004 UTC (19 years, 7 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.44:	+1 -3 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#include <cmath>
2
3	root	1.45	#include "opengl.h"
4	root	1.26
5	root	1.37	#include "view.h"
6	root	1.1	#include "oct.h"
7
8	root	1.37	vector<GLuint> occ_query_objects;
9
10			static GLuint begin_occ_query ()
11			{
12			GLuint id;
13
14			if (occ_query_objects.size ())
15			{
16			id = *(occ_query_objects.end () - 1);
17			occ_query_objects.pop_back ();
18			}
19			else
20			glGenQueriesARB (1, &id);
21
22			glBeginQueryARB (GL_SAMPLES_PASSED, id);
23			return id;
24			}
25
26			inline void end_occ_query ()
27			{
28			glEndQueryARB (GL_SAMPLES_PASSED);
29			}
30
31			static GLuint occ_query_result (GLuint id)
32			{
33			GLuint count;
34
35			glGetQueryObjectuivARB (id, GL_QUERY_RESULT, &count);
36			occ_query_objects.push_back (id);
37
38			return count;
39			}
40
41	root	1.17	view::view ()
42	root	1.18	: gamma(1.0)
43	root	1.1	{
44			}
45
46	root	1.17	view::~view ()
47	root	1.1	{
48			}
49
50	root	1.37	void view::begin_occ_query (recv_occ_query &recv)
51			{
52			occ_queries.push_back (oq_data (&recv, ::begin_occ_query ()));
53			}
54
55			void view::end_occ_query ()
56			{
57			::end_occ_query ();
58			}
59
60	root	1.34	bool view::may_draw (const entity *e)
61	root	1.1	{
62			if (drawn.find (e) != drawn.end ())
63			return false;
64
65			drawn.insert (e);
66			return true;
67			}
68
69	root	1.18	void view::reset_projection ()
70	root	1.1	{
71	root	1.42	renormalize (orig, p);
72	root	1.3
73	root	1.1	glViewport (0, 0, w, h);
74
75			glMatrixMode (GL_PROJECTION);
76			glLoadIdentity ();
77
78			GLdouble aspect = (GLdouble)w/h;
79	root	1.42	GLdouble ymax = z_near * tan (fov * (M_PI / 360.0));
80	root	1.1
81	root	1.42	glFrustum (-ymax * aspect, ymax * aspect, -ymax, ymax, z_near, z_far);
82	root	1.1
83	root	1.6	d = normalize (d);//D
84			u = normalize (u);//D
85	root	1.41
86	root	1.1	vec3 rz = -d;
87			vec3 rx = cross (u, rz);
88			vec3 ry = cross (rz, rx);
89
90	root	1.17	matrix &m = projection;
91	root	1.16	m(0,0) = rx.x; m(0,1) = rx.y; m(0,2) = rx.z; m(0,3) = 0;
92			m(1,0) = ry.x; m(1,1) = ry.y; m(1,2) = ry.z; m(1,3) = 0;
93			m(2,0) = rz.x; m(2,1) = rz.y; m(2,2) = rz.z; m(2,3) = 0;
94	root	1.3	m(3,0) = 0; m(3,1) = 0; m(3,2) = 0; m(3,3) = 1;
95	root	1.37
96	root	1.38	diagfact = abs (rz.x) + abs (rz.y) + abs (rz.z);
97	root	1.41	diagfact = sqrtf (3.);//D WHY???
98			//printf ("diagfact = %f\n", diagfact);
99	root	1.3
100	root	1.38	glMultMatrixf (m);
101			glTranslatef (-p.x, -p.y, -p.z);
102	root	1.6
103	root	1.38	glGetFloatv (GL_PROJECTION_MATRIX, m);
104	root	1.5
105	root	1.17	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) );
106			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) );
107			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) );
108			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) );
109			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) );
110			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) );
111	root	1.1
112	root	1.13	glMatrixMode (GL_MODELVIEW);
113	root	1.12	glLoadIdentity ();
114	root	1.18	}
115
116			void view::begin ()
117			{
118	root	1.30	glClear (GL_COLOR_BUFFER_BIT \| GL_DEPTH_BUFFER_BIT);
119			glDepthRange (0, 1. - (1. / pow (2., 16.)));
120
121	root	1.19	vislist.clear ();
122	root	1.18
123			generation++;
124	root	1.12
125	root	1.31	farlist.clear ();
126
127	root	1.37	// check occlusion queries
128			for (vector<oq_data>::iterator i = occ_queries.begin (); i != occ_queries.end (); ++i)
129			{
130			occ_query oq(*this, i->second, occ_query_result (i->second));
131			i->first->event (oq);
132			}
133	root	1.20
134	root	1.37	occ_queries.clear ();
135	root	1.18
136	root	1.43	z_far = nz_far;
137			c_far = nc_far;
138			reset_projection ();
139
140	root	1.42	nc_far = nz_far = z_near + 1.F;
141	root	1.17	world.detect_visibility (*this);
142	root	1.42
143			printf ("far %f cf %f RCP %f,%f,%f +%f\n", z_far, c_far,
144	root	1.38	frustum.r.n.x,
145			frustum.r.n.y,
146			frustum.r.n.z,
147			frustum.r.d
148			);//D
149	root	1.18	}
150
151			void view::end ()
152			{
153	root	1.40	vislist.clear ();
154	root	1.18	}
155
156			void view::pass (enum mode m)
157			{
158			mode = m;
159
160			glDisable (GL_ALPHA_TEST);
161			glDisable (GL_BLEND);
162	root	1.4
163	root	1.18	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	root	1.38	cgGLDisableProfile (vsh_profile);// z-fighting??
171	root	1.23	cgGLDisableProfile (fsh_profile);
172	root	1.18	}
173			else
174			{
175			glEnable (GL_MINMAX);
176			glDisable (GL_POLYGON_OFFSET_FILL);
177			glDepthFunc (GL_LESS);
178	root	1.38	glDepthMask (1);
179	root	1.23	cgGLEnableProfile (vsh_profile);
180			cgGLEnableProfile (fsh_profile);
181	root	1.18	}
182
183	root	1.17	for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i)
184	root	1.40	{
185			visibility_state &vs = vismap[*i];
186	root	1.44	bool oq = mode == LIGHTED
187			&& vs.last + 1. < timer.now
188			&& (vs.visibility == visibility_state::PARTIAL
189			\|\| vs.visibility == visibility_state::FULL);
190	root	1.40
191			if (oq)
192			begin_occ_query (**i);
193
194			(i)->display (this);
195
196			if (oq)
197			end_occ_query ();
198			}
199	root	1.17
200			drawn.clear ();
201	root	1.24
202	root	1.39	if (mode == view::DEPTH)
203	root	1.25	{
204	root	1.27	glEnable (GL_DEPTH_CLAMP_NV);
205	root	1.42	glDepthMask (0);
206	root	1.44	glColorMask (0, 0, 0, 0);
207	root	1.30	glDepthFunc (GL_LESS);
208	root	1.37	if (mode == view::LIGHTED) glDepthFunc (GL_LEQUAL);
209	root	1.44	if (mode == view::LIGHTED) glColorMask (1, 1, 1, 0);
210	root	1.30	glDisable (GL_LIGHTING);
211	root	1.27	cgGLDisableProfile (vsh_profile);
212			cgGLDisableProfile (fsh_profile);
213
214	root	1.33	#if 0
215	root	1.25	static int count; count++;
216			if (farlist.size ())
217			printf ("%d: size %d\n", count, farlist.size ());
218	root	1.33	#endif
219	root	1.25
220	root	1.37	for (vector<octant *>::iterator i = farlist.begin (); i != farlist.end (); ++i)
221			{
222			if (mode == view::DEPTH) begin_occ_query (**i);
223	root	1.38	if (mode == view::LIGHTED) glColor3f ((((long)*i >> 6) & 15) / 31. + 0.5,0,0);
224	root	1.37	(i)->draw_bbox (this);
225			if (mode == view::DEPTH) end_occ_query ();
226	root	1.30	}
227	root	1.27
228			glDisable (GL_DEPTH_CLAMP_NV);
229	root	1.42	glDepthMask (1);
230	root	1.25	}
231	root	1.4
232			glColorMask (1, 1, 1, 0);
233			glDepthMask (1);
234	root	1.27
235	root	1.1	}
236	root	1.6
237	root	1.1