libgender/view.C

#include <cmath>

#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
  checklist.clear ();

  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);
      //cgGLDisableProfile (CG_PROFILE_ARBVP1);
      cgGLDisableProfile (CG_PROFILE_ARBFP1);
    }
  else
    {
#if 0
      glEnable (GL_MINMAX);
#endif
      glDisable (GL_POLYGON_OFFSET_FILL);
      glDepthFunc (GL_LESS);
      glDepthMask (0);
      cgGLEnableProfile (CG_PROFILE_ARBVP1);
      cgGLEnableProfile (CG_PROFILE_ARBFP1);
    }
  
  for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i)
    (*i)->display (*this);

  drawn.clear ();

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


Revision:	1.19
Committed:	Wed Oct 6 01:59:21 2004 UTC (21 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.18:	+3 -0 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#include <cmath>
2
3			#include "oct.h"
4			#include "view.h"
5
6	root	1.17	view::view ()
7	root	1.18	: gamma(1.0)
8	root	1.1	{
9			}
10
11	root	1.17	view::~view ()
12	root	1.1	{
13			}
14
15	root	1.17	bool view::may_draw (entity_base *e)
16	root	1.1	{
17			if (drawn.find (e) != drawn.end ())
18			return false;
19
20			drawn.insert (e);
21			return true;
22			}
23
24	root	1.18	void view::reset_projection ()
25	root	1.1	{
26	root	1.5	renormalize (orig, p);
27	root	1.3
28	root	1.1	glViewport (0, 0, w, h);
29
30			glMatrixMode (GL_PROJECTION);
31			glLoadIdentity ();
32
33			GLdouble aspect = (GLdouble)w/h;
34	root	1.6	GLdouble zNear = 0.1;
35			GLdouble zFar = 50.;
36	root	1.1
37			GLdouble ymax = zNear * tan (fov * (M_PI / 360.0));
38			glFrustum (-ymax * aspect, ymax * aspect, -ymax, ymax, zNear, zFar);
39
40	root	1.6	d = normalize (d);//D
41			u = normalize (u);//D
42	root	1.1	vec3 rz = -d;
43			vec3 rx = cross (u, rz);
44			vec3 ry = cross (rz, rx);
45
46	root	1.17	matrix &m = projection;
47	root	1.16	m(0,0) = rx.x; m(0,1) = rx.y; m(0,2) = rx.z; m(0,3) = 0;
48			m(1,0) = ry.x; m(1,1) = ry.y; m(1,2) = ry.z; m(1,3) = 0;
49			m(2,0) = rz.x; m(2,1) = rz.y; m(2,2) = rz.z; m(2,3) = 0;
50	root	1.3	m(3,0) = 0; m(3,1) = 0; m(3,2) = 0; m(3,3) = 1;
51
52			glMultMatrixf ((GLfloat *)m.data);
53	root	1.6
54	root	1.5	glGetFloatv (GL_PROJECTION_MATRIX, (GLfloat *)&m);
55
56	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) );
57			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) );
58			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) );
59			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) );
60			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) );
61			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) );
62	root	1.1
63	root	1.13	glMatrixMode (GL_MODELVIEW);
64	root	1.12	glLoadIdentity ();
65	root	1.16	glTranslatef (-p.x, -p.y, -p.z);
66	root	1.18	}
67
68			void view::begin ()
69			{
70			vismap.clear ();
71	root	1.19	vislist.clear ();
72	root	1.18
73			generation++;
74	root	1.12
75	root	1.18	reset_projection ();
76
77			// check occlusion queries here
78	root	1.17	checklist.clear ();
79	root	1.18
80	root	1.17	world.detect_visibility (*this);
81	root	1.18	}
82
83			void view::end ()
84			{
85			vismap.clear ();
86			}
87
88			void view::pass (enum mode m)
89			{
90			mode = m;
91
92			glDisable (GL_ALPHA_TEST);
93			glDisable (GL_BLEND);
94	root	1.4
95	root	1.18	if (mode == view::DEPTH)
96			{
97			glEnable (GL_POLYGON_OFFSET_FILL);
98			glPolygonOffset (0, 1);
99			glDepthFunc (GL_LESS);
100			glDisable (GL_LIGHTING);
101			glColorMask (0, 0, 0, 0);
102			//cgGLDisableProfile (CG_PROFILE_ARBVP1);
103			cgGLDisableProfile (CG_PROFILE_ARBFP1);
104			}
105			else
106			{
107	root	1.19	#if 0
108	root	1.18	glEnable (GL_MINMAX);
109	root	1.19	#endif
110	root	1.18	glDisable (GL_POLYGON_OFFSET_FILL);
111			glDepthFunc (GL_LESS);
112			glDepthMask (0);
113			cgGLEnableProfile (CG_PROFILE_ARBVP1);
114			cgGLEnableProfile (CG_PROFILE_ARBFP1);
115			}
116
117	root	1.17	for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i)
118			(i)->display (this);
119
120			drawn.clear ();
121	root	1.4
122			glColorMask (1, 1, 1, 0);
123			glDepthMask (1);
124	root	1.1	}
125	root	1.6
126	root	1.1