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);

  perspfact = z_near / ymax * 0.5 * (GLdouble)h;

  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);
  //printf ("diagfact = %f\n", diagfact);
  diagfact = sqrtf (3.);//D WHY???

  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);

  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;

  if (z_far < z_near)
    z_far = z_near * 2.;

  reset_projection ();

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

  printf ("far %f cf %f CAM (%d,%d,%d)\n", z_far, c_far, orig.x, orig.y, orig.z);//D
}

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

#define DEPTH_OFFSET (1. / (GLdouble)(1L << 16))

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

  glDisable (GL_ALPHA_TEST);
  glDisable (GL_BLEND);
  //glDisable (GL_DEPTH_TEST);

  if (mode == view::DEPTH)
    {
      //glEnable (GL_POLYGON_OFFSET_FILL);
      //glPolygonOffset (0, 5);
      glDepthRange (DEPTH_OFFSET, 1.);
      glDepthFunc (GL_LESS);
      glDisable (GL_LIGHTING);
      glColorMask (0, 0, 0, 0);
    }
  else
    {
      glEnable (GL_MINMAX);
      //glDisable (GL_POLYGON_OFFSET_FILL);
      glDepthRange (0., 1. - DEPTH_OFFSET);
      glDepthFunc (GL_LESS);
      glDepthMask (0);
    }
  
  for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i)
    {
      octant *o = *i;

      visibility_state &vs = vismap[o];
      bool oq = mode == LIGHTED
                && vs.last + 1. < timer.now
                && (vs.visibility == visibility_state::PARTIAL
                    || vs.visibility == visibility_state::FULL);

      if (oq)
        begin_occ_query (*o);

      o->display (*this);

      if (oq) // && o->fill) WHY???
        {
          glColorMask (0, 0, 0, 0);
          o->draw_bbox (*this);
          glColorMask (1, 1, 1, 0);
        }

      if (oq)
        end_occ_query ();
    }

  drawn.clear ();

  if (mode == view::DEPTH)
    {
      glEnable (GL_DEPTH_CLAMP_NV);
      glDepthMask (0);
      glDepthFunc (GL_LESS);

      for (vector<octant *>::iterator i = farlist.begin (); i != farlist.end (); ++i)
        {
          begin_occ_query (**i);
          (*i)->draw_bbox (*this);
          end_occ_query ();
       }

      glDisable (GL_DEPTH_CLAMP_NV);
    }

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


Revision:	1.50
Committed:	Thu Oct 14 19:54:14 2004 UTC (19 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.49:	+7 -9 lines
Log Message:	* empty log message *
#	Content
1	#include <cmath>
2
3	#include "opengl.h"
4
5	#include "view.h"
6	#include "oct.h"
7
8	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	view::view ()
42	: gamma(1.0)
43	{
44	}
45
46	view::~view ()
47	{
48	}
49
50	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	bool view::may_draw (const entity *e)
61	{
62	if (drawn.find (e) != drawn.end ())
63	return false;
64
65	drawn.insert (e);
66	return true;
67	}
68
69	void view::reset_projection ()
70	{
71	renormalize (orig, p);
72
73	glViewport (0, 0, w, h);
74
75	glMatrixMode (GL_PROJECTION);
76	glLoadIdentity ();
77
78	GLdouble aspect = (GLdouble)w/h;
79	GLdouble ymax = z_near * tan (fov * (M_PI / 360.0));
80
81	glFrustum (-ymax * aspect, ymax * aspect, -ymax, ymax, z_near, z_far);
82
83	perspfact = z_near / ymax * 0.5 * (GLdouble)h;
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	//printf ("diagfact = %f\n", diagfact);
100	diagfact = sqrtf (3.);//D WHY???
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
122	vislist.clear ();
123
124	generation++;
125
126	farlist.clear ();
127
128	// check occlusion queries
129	for (vector<oq_data>::iterator i = occ_queries.begin (); i != occ_queries.end (); ++i)
130	{
131	occ_query oq(*this, i->second, ::occ_query_result (i->second));
132	i->first->event (oq);
133	}
134
135	occ_queries.clear ();
136
137	z_far = nz_far;
138	c_far = nc_far;
139
140	if (z_far < z_near)
141	z_far = z_near * 2.;
142
143	reset_projection ();
144
145	nc_far = nz_far = z_near + 1.F;
146	world.detect_visibility (*this);
147
148	printf ("far %f cf %f CAM (%d,%d,%d)\n", z_far, c_far, orig.x, orig.y, orig.z);//D
149	}
150
151	void view::end ()
152	{
153	vislist.clear ();
154	}
155
156	#define DEPTH_OFFSET (1. / (GLdouble)(1L << 16))
157
158	void view::pass (enum mode m)
159	{
160	mode = m;
161
162	glDisable (GL_ALPHA_TEST);
163	glDisable (GL_BLEND);
164	//glDisable (GL_DEPTH_TEST);
165
166	if (mode == view::DEPTH)
167	{
168	//glEnable (GL_POLYGON_OFFSET_FILL);
169	//glPolygonOffset (0, 5);
170	glDepthRange (DEPTH_OFFSET, 1.);
171	glDepthFunc (GL_LESS);
172	glDisable (GL_LIGHTING);
173	glColorMask (0, 0, 0, 0);
174	}
175	else
176	{
177	glEnable (GL_MINMAX);
178	//glDisable (GL_POLYGON_OFFSET_FILL);
179	glDepthRange (0., 1. - DEPTH_OFFSET);
180	glDepthFunc (GL_LESS);
181	glDepthMask (0);
182	}
183
184	for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i)
185	{
186	octant o = i;
187
188	visibility_state &vs = vismap[o];
189	bool oq = mode == LIGHTED
190	&& vs.last + 1. < timer.now
191	&& (vs.visibility == visibility_state::PARTIAL
192	\|\| vs.visibility == visibility_state::FULL);
193
194	if (oq)
195	begin_occ_query (*o);
196
197	o->display (*this);
198
199	if (oq) // && o->fill) WHY???
200	{
201	glColorMask (0, 0, 0, 0);
202	o->draw_bbox (*this);
203	glColorMask (1, 1, 1, 0);
204	}
205
206	if (oq)
207	end_occ_query ();
208	}
209
210	drawn.clear ();
211
212	if (mode == view::DEPTH)
213	{
214	glEnable (GL_DEPTH_CLAMP_NV);
215	glDepthMask (0);
216	glDepthFunc (GL_LESS);
217
218	for (vector<octant *>::iterator i = farlist.begin (); i != farlist.end (); ++i)
219	{
220	begin_occ_query (**i);
221	(i)->draw_bbox (this);
222	end_occ_query ();
223	}
224
225	glDisable (GL_DEPTH_CLAMP_NV);
226	}
227
228	glColorMask (1, 1, 1, 0);
229	glDepthMask (1);
230	}
231
232