libgender/view.C

#include <cmath>

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

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

      static GLenum gl_error;
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 ();

      gl_error = glGetError ();
  GLdouble aspect = (GLdouble)w/h;
  GLdouble zNear = 0.1;
  GLdouble zFar = 50.;

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

      gl_error = glGetError ();
  d = normalize (d);//D
  u = normalize (u);//D
  vec3 rz = -d;
  vec3 rx = cross (u, rz);
  vec3 ry = cross (rz, rx);
      gl_error = glGetError ();

  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;
      gl_error = glGetError ();

  glMultMatrixf ((GLfloat *)m.data);

      gl_error = glGetError ();
  glGetFloatv (GL_PROJECTION_MATRIX, (GLfloat *)&m);

      gl_error = glGetError ();
  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) );

      gl_error = glGetError ();
  glMatrixMode (GL_MODELVIEW);
  glLoadIdentity ();
  glTranslatef (-p.x, -p.y, -p.z);
      gl_error = glGetError ();
}

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:	1.32
Committed:	Wed Oct 6 17:55:40 2004 UTC (19 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.31:	+10 -0 lines
Log Message:	i
#	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	1.32	static GLenum gl_error;
10	root	1.17	view::view ()
11	root	1.18	: gamma(1.0)
12	root	1.1	{
13			}
14
15	root	1.17	view::~view ()
16	root	1.1	{
17			}
18
19	root	1.17	bool view::may_draw (entity_base *e)
20	root	1.1	{
21			if (drawn.find (e) != drawn.end ())
22			return false;
23
24			drawn.insert (e);
25			return true;
26			}
27
28	root	1.18	void view::reset_projection ()
29	root	1.1	{
30	root	1.5	renormalize (orig, p);
31	root	1.3
32	root	1.1	glViewport (0, 0, w, h);
33
34			glMatrixMode (GL_PROJECTION);
35			glLoadIdentity ();
36
37	root	1.32	gl_error = glGetError ();
38	root	1.1	GLdouble aspect = (GLdouble)w/h;
39	root	1.6	GLdouble zNear = 0.1;
40			GLdouble zFar = 50.;
41	root	1.1
42	root	1.32	gl_error = glGetError ();
43	root	1.1	GLdouble ymax = zNear * tan (fov * (M_PI / 360.0));
44			glFrustum (-ymax * aspect, ymax * aspect, -ymax, ymax, zNear, zFar);
45
46	root	1.32	gl_error = glGetError ();
47	root	1.6	d = normalize (d);//D
48			u = normalize (u);//D
49	root	1.1	vec3 rz = -d;
50			vec3 rx = cross (u, rz);
51			vec3 ry = cross (rz, rx);
52	root	1.32	gl_error = glGetError ();
53	root	1.1
54	root	1.17	matrix &m = projection;
55	root	1.16	m(0,0) = rx.x; m(0,1) = rx.y; m(0,2) = rx.z; m(0,3) = 0;
56			m(1,0) = ry.x; m(1,1) = ry.y; m(1,2) = ry.z; m(1,3) = 0;
57			m(2,0) = rz.x; m(2,1) = rz.y; m(2,2) = rz.z; m(2,3) = 0;
58	root	1.3	m(3,0) = 0; m(3,1) = 0; m(3,2) = 0; m(3,3) = 1;
59	root	1.32	gl_error = glGetError ();
60	root	1.3
61			glMultMatrixf ((GLfloat *)m.data);
62	root	1.6
63	root	1.32	gl_error = glGetError ();
64	root	1.5	glGetFloatv (GL_PROJECTION_MATRIX, (GLfloat *)&m);
65
66	root	1.32	gl_error = glGetError ();
67	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) );
68			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) );
69			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) );
70			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) );
71			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) );
72			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) );
73	root	1.1
74	root	1.32	gl_error = glGetError ();
75	root	1.13	glMatrixMode (GL_MODELVIEW);
76	root	1.12	glLoadIdentity ();
77	root	1.16	glTranslatef (-p.x, -p.y, -p.z);
78	root	1.32	gl_error = glGetError ();
79	root	1.18	}
80
81			void view::begin ()
82			{
83	root	1.30	glClear (GL_COLOR_BUFFER_BIT \| GL_DEPTH_BUFFER_BIT);
84			glDepthRange (0, 1. - (1. / pow (2., 16.)));
85
86	root	1.18	vismap.clear ();
87	root	1.19	vislist.clear ();
88	root	1.18
89			generation++;
90	root	1.12
91	root	1.18	reset_projection ();
92
93	root	1.31	for (vector<octant *>::iterator i = farlist.begin (); i != farlist.end (); ++i)
94			;
95			farlist.clear ();
96
97	root	1.18	// check occlusion queries here
98	root	1.24	#if 0
99	root	1.20	for (vector<octant *>::iterator i = checklist.begin (); i != checklist.end (); ++i)
100	root	1.22	//printf ("%p %d\n", i, occ_query_result ((i)->occ_query));
101			occ_query_result ((*i)->occ_query);
102	root	1.20
103	root	1.17	checklist.clear ();
104	root	1.24	#endif
105	root	1.18
106	root	1.17	world.detect_visibility (*this);
107	root	1.18	}
108
109			void view::end ()
110			{
111			vismap.clear ();
112			}
113
114			void view::pass (enum mode m)
115			{
116			mode = m;
117
118			glDisable (GL_ALPHA_TEST);
119			glDisable (GL_BLEND);
120	root	1.4
121	root	1.18	if (mode == view::DEPTH)
122			{
123			glEnable (GL_POLYGON_OFFSET_FILL);
124			glPolygonOffset (0, 1);
125			glDepthFunc (GL_LESS);
126			glDisable (GL_LIGHTING);
127			glColorMask (0, 0, 0, 0);
128	root	1.24	cgGLEnableProfile (vsh_profile);// z-fighting??
129	root	1.23	cgGLDisableProfile (fsh_profile);
130	root	1.18	}
131			else
132			{
133			glEnable (GL_MINMAX);
134			glDisable (GL_POLYGON_OFFSET_FILL);
135			glDepthFunc (GL_LESS);
136			glDepthMask (0);
137	root	1.23	cgGLEnableProfile (vsh_profile);
138			cgGLEnableProfile (fsh_profile);
139	root	1.18	}
140
141	root	1.17	for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i)
142			(i)->display (this);
143
144			drawn.clear ();
145	root	1.24
146	root	1.27	if (mode == view::LIGHTED)
147	root	1.25	{
148	root	1.27	glEnable (GL_DEPTH_CLAMP_NV);
149	root	1.30	glDepthFunc (GL_LESS);
150	root	1.27	glEnable (GL_COLOR_MATERIAL);
151	root	1.30	glDisable (GL_LIGHTING);
152			#if 1
153	root	1.27	cgGLDisableProfile (vsh_profile);
154			cgGLDisableProfile (fsh_profile);
155			#endif
156	root	1.28	glShadeModel (GL_FLAT);
157	root	1.27
158	root	1.25	static int count; count++;
159			if (farlist.size ())
160			printf ("%d: size %d\n", count, farlist.size ());
161
162	root	1.30	for (vector<octant *>::iterator i = farlist.begin (); i != farlist.end (); ++i)
163			{
164			glColor3f (1 / (GLfloat)(i - farlist.begin()), 1, 1 / (GLfloat)(i - farlist.begin()));
165	root	1.25	(i)->draw_bbox (this);
166	root	1.30	}
167	root	1.27
168			glEnable (GL_DEPTH_TEST);
169			glDisable (GL_DEPTH_CLAMP_NV);
170	root	1.28	glShadeModel (GL_SMOOTH);
171	root	1.25	}
172	root	1.4
173			glColorMask (1, 1, 1, 0);
174			glDepthMask (1);
175	root	1.27
176	root	1.1	}
177	root	1.6
178	root	1.1