libgender/view.C

#include <cmath>

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

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

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

view::~view ()
{
}

bool view::may_draw (entity_base *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 zNear = 0.1;
  GLdouble zFar = 50.;

  GLdouble ymax = zNear * tan (fov * (M_PI / 360.0));
  glFrustum (-ymax * aspect, ymax * aspect, -ymax, ymax, zNear, zFar);

  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;

  glMultMatrixf ((GLfloat *)m.data);

  glGetFloatv (GL_PROJECTION_MATRIX, (GLfloat *)&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 ();
  glTranslatef (-p.x, -p.y, -p.z);
}

void view::begin ()
{
  vismap.clear ();
  vislist.clear ();

  generation++;

  reset_projection ();

  // check occlusion queries here
#if 0
  for (vector<octant *>::iterator i = checklist.begin (); i != checklist.end (); ++i)
    //printf ("%p %d\n", *i, occ_query_result ((*i)->occ_query));
    occ_query_result ((*i)->occ_query);

  checklist.clear ();
#endif

  world.detect_visibility (*this);
}

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);
      cgGLEnableProfile (vsh_profile);// z-fighting??
      cgGLDisableProfile (fsh_profile);
    }
  else
    {
      glEnable (GL_MINMAX);
      glDisable (GL_POLYGON_OFFSET_FILL);
      glDepthFunc (GL_LESS);
      glDepthMask (0);
      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)
    {
      static int count; count++;
      if (farlist.size ())
        printf ("%d: size %d\n", count, farlist.size ());

      glDepthFunc (GL_LEQUAL);
      for (vector<octant *>::iterator i = farlist.begin (); i != farlist.end (); ++i)
        (*i)->draw_bbox (*this);

      farlist.clear ();
    }

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


Revision:	1.26
Committed:	Wed Oct 6 15:20:11 2004 UTC (19 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.25:	+3 -0 lines
Log Message:	fixed missing header
#	User	Rev	Content
1	root	1.1	#include <cmath>
2
3	root	1.26	#include <GL/gl.h>
4			#include <GL/glext.h>
5
6	root	1.1	#include "oct.h"
7			#include "view.h"
8
9	root	1.17	view::view ()
10	root	1.18	: gamma(1.0)
11	root	1.1	{
12			}
13
14	root	1.17	view::~view ()
15	root	1.1	{
16			}
17
18	root	1.17	bool view::may_draw (entity_base *e)
19	root	1.1	{
20			if (drawn.find (e) != drawn.end ())
21			return false;
22
23			drawn.insert (e);
24			return true;
25			}
26
27	root	1.18	void view::reset_projection ()
28	root	1.1	{
29	root	1.5	renormalize (orig, p);
30	root	1.3
31	root	1.1	glViewport (0, 0, w, h);
32
33			glMatrixMode (GL_PROJECTION);
34			glLoadIdentity ();
35
36			GLdouble aspect = (GLdouble)w/h;
37	root	1.6	GLdouble zNear = 0.1;
38			GLdouble zFar = 50.;
39	root	1.1
40			GLdouble ymax = zNear * tan (fov * (M_PI / 360.0));
41			glFrustum (-ymax * aspect, ymax * aspect, -ymax, ymax, zNear, zFar);
42
43	root	1.6	d = normalize (d);//D
44			u = normalize (u);//D
45	root	1.1	vec3 rz = -d;
46			vec3 rx = cross (u, rz);
47			vec3 ry = cross (rz, rx);
48
49	root	1.17	matrix &m = projection;
50	root	1.16	m(0,0) = rx.x; m(0,1) = rx.y; m(0,2) = rx.z; m(0,3) = 0;
51			m(1,0) = ry.x; m(1,1) = ry.y; m(1,2) = ry.z; m(1,3) = 0;
52			m(2,0) = rz.x; m(2,1) = rz.y; m(2,2) = rz.z; m(2,3) = 0;
53	root	1.3	m(3,0) = 0; m(3,1) = 0; m(3,2) = 0; m(3,3) = 1;
54
55			glMultMatrixf ((GLfloat *)m.data);
56	root	1.6
57	root	1.5	glGetFloatv (GL_PROJECTION_MATRIX, (GLfloat *)&m);
58
59	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) );
60			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) );
61			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) );
62			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) );
63			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) );
64			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) );
65	root	1.1
66	root	1.13	glMatrixMode (GL_MODELVIEW);
67	root	1.12	glLoadIdentity ();
68	root	1.16	glTranslatef (-p.x, -p.y, -p.z);
69	root	1.18	}
70
71			void view::begin ()
72			{
73			vismap.clear ();
74	root	1.19	vislist.clear ();
75	root	1.18
76			generation++;
77	root	1.12
78	root	1.18	reset_projection ();
79
80			// check occlusion queries here
81	root	1.24	#if 0
82	root	1.20	for (vector<octant *>::iterator i = checklist.begin (); i != checklist.end (); ++i)
83	root	1.22	//printf ("%p %d\n", i, occ_query_result ((i)->occ_query));
84			occ_query_result ((*i)->occ_query);
85	root	1.20
86	root	1.17	checklist.clear ();
87	root	1.24	#endif
88	root	1.18
89	root	1.17	world.detect_visibility (*this);
90	root	1.18	}
91
92			void view::end ()
93			{
94			vismap.clear ();
95			}
96
97			void view::pass (enum mode m)
98			{
99			mode = m;
100
101			glDisable (GL_ALPHA_TEST);
102			glDisable (GL_BLEND);
103	root	1.4
104	root	1.18	if (mode == view::DEPTH)
105			{
106			glEnable (GL_POLYGON_OFFSET_FILL);
107			glPolygonOffset (0, 1);
108			glDepthFunc (GL_LESS);
109			glDisable (GL_LIGHTING);
110			glColorMask (0, 0, 0, 0);
111	root	1.24	cgGLEnableProfile (vsh_profile);// z-fighting??
112	root	1.23	cgGLDisableProfile (fsh_profile);
113	root	1.18	}
114			else
115			{
116			glEnable (GL_MINMAX);
117			glDisable (GL_POLYGON_OFFSET_FILL);
118			glDepthFunc (GL_LESS);
119			glDepthMask (0);
120	root	1.23	cgGLEnableProfile (vsh_profile);
121			cgGLEnableProfile (fsh_profile);
122	root	1.18	}
123
124	root	1.17	for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i)
125			(i)->display (this);
126
127			drawn.clear ();
128	root	1.24
129	root	1.25	if (mode == view::DEPTH)
130			{
131			static int count; count++;
132			if (farlist.size ())
133			printf ("%d: size %d\n", count, farlist.size ());
134
135			glDepthFunc (GL_LEQUAL);
136			for (vector<octant *>::iterator i = farlist.begin (); i != farlist.end (); ++i)
137			(i)->draw_bbox (this);
138
139			farlist.clear ();
140			}
141	root	1.4
142			glColorMask (1, 1, 1, 0);
143			glDepthMask (1);
144	root	1.1	}
145	root	1.6
146	root	1.1