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

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

  generation++;

  reset_projection ();

  for (vector<octant *>::iterator i = farlist.begin (); i != farlist.end (); ++i)
    ;
  farlist.clear ();

  // 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::LIGHTED)
    {
      glEnable (GL_DEPTH_CLAMP_NV);
      glDepthFunc (GL_LESS);
      glEnable (GL_COLOR_MATERIAL);
      glDisable (GL_LIGHTING);
#if 1
      cgGLDisableProfile (vsh_profile);
      cgGLDisableProfile (fsh_profile);
#endif
      glShadeModel (GL_FLAT);

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

     for (vector<octant *>::iterator i = farlist.begin (); i != farlist.end (); ++i)
       {
        glColor3f (1 / (GLfloat)(i - farlist.begin()), 1, 1 / (GLfloat)(i - farlist.begin()));
        (*i)->draw_bbox (*this);
       }

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

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

}


Revision:	1.31
Committed:	Wed Oct 6 17:04:06 2004 UTC (19 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.30:	+4 -2 lines
Log Message:	* empty log message *
#	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	root	1.30	glClear (GL_COLOR_BUFFER_BIT \| GL_DEPTH_BUFFER_BIT);
74			glDepthRange (0, 1. - (1. / pow (2., 16.)));
75
76	root	1.18	vismap.clear ();
77	root	1.19	vislist.clear ();
78	root	1.18
79			generation++;
80	root	1.12
81	root	1.18	reset_projection ();
82
83	root	1.31	for (vector<octant *>::iterator i = farlist.begin (); i != farlist.end (); ++i)
84			;
85			farlist.clear ();
86
87	root	1.18	// check occlusion queries here
88	root	1.24	#if 0
89	root	1.20	for (vector<octant *>::iterator i = checklist.begin (); i != checklist.end (); ++i)
90	root	1.22	//printf ("%p %d\n", i, occ_query_result ((i)->occ_query));
91			occ_query_result ((*i)->occ_query);
92	root	1.20
93	root	1.17	checklist.clear ();
94	root	1.24	#endif
95	root	1.18
96	root	1.17	world.detect_visibility (*this);
97	root	1.18	}
98
99			void view::end ()
100			{
101			vismap.clear ();
102			}
103
104			void view::pass (enum mode m)
105			{
106			mode = m;
107
108			glDisable (GL_ALPHA_TEST);
109			glDisable (GL_BLEND);
110	root	1.4
111	root	1.18	if (mode == view::DEPTH)
112			{
113			glEnable (GL_POLYGON_OFFSET_FILL);
114			glPolygonOffset (0, 1);
115			glDepthFunc (GL_LESS);
116			glDisable (GL_LIGHTING);
117			glColorMask (0, 0, 0, 0);
118	root	1.24	cgGLEnableProfile (vsh_profile);// z-fighting??
119	root	1.23	cgGLDisableProfile (fsh_profile);
120	root	1.18	}
121			else
122			{
123			glEnable (GL_MINMAX);
124			glDisable (GL_POLYGON_OFFSET_FILL);
125			glDepthFunc (GL_LESS);
126			glDepthMask (0);
127	root	1.23	cgGLEnableProfile (vsh_profile);
128			cgGLEnableProfile (fsh_profile);
129	root	1.18	}
130
131	root	1.17	for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i)
132			(i)->display (this);
133
134			drawn.clear ();
135	root	1.24
136	root	1.27	if (mode == view::LIGHTED)
137	root	1.25	{
138	root	1.27	glEnable (GL_DEPTH_CLAMP_NV);
139	root	1.30	glDepthFunc (GL_LESS);
140	root	1.27	glEnable (GL_COLOR_MATERIAL);
141	root	1.30	glDisable (GL_LIGHTING);
142			#if 1
143	root	1.27	cgGLDisableProfile (vsh_profile);
144			cgGLDisableProfile (fsh_profile);
145			#endif
146	root	1.28	glShadeModel (GL_FLAT);
147	root	1.27
148	root	1.25	static int count; count++;
149			if (farlist.size ())
150			printf ("%d: size %d\n", count, farlist.size ());
151
152	root	1.30	for (vector<octant *>::iterator i = farlist.begin (); i != farlist.end (); ++i)
153			{
154			glColor3f (1 / (GLfloat)(i - farlist.begin()), 1, 1 / (GLfloat)(i - farlist.begin()));
155	root	1.25	(i)->draw_bbox (this);
156	root	1.30	}
157	root	1.27
158			glEnable (GL_DEPTH_TEST);
159			glDisable (GL_DEPTH_CLAMP_NV);
160	root	1.28	glShadeModel (GL_SMOOTH);
161	root	1.25	}
162	root	1.4
163			glColorMask (1, 1, 1, 0);
164			glDepthMask (1);
165	root	1.27
166	root	1.1	}
167	root	1.6
168	root	1.1