libgender/view.C

#include <cmath>

#include "opengl.h"

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

#include "entity.h"

using namespace gl;

skybox *world_skybox;

pass_data pass_depth     (0, DEPTH);
pass_data pass_postdepth (0, POSTDEPTH);

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
    glGenQueries (1, &id);

  glBeginQuery (GL_SAMPLES_PASSED, id);
  return id;
}

inline void end_occ_query ()
{
  glEndQuery (GL_SAMPLES_PASSED);
}

static GLuint occ_query_result (GLuint id)
{
  GLuint count;

  glGetQueryObjectuiv (id, GL_QUERY_RESULT, &count);
  occ_query_objects.push_back (id);

  return count;
}

view::view ()
: gamma(1.0), nz_near (1.F), nz_far (2.F)
{
}

view::~view ()
{
}

void view::begin_occ_query (int &res)
{
  occ_queries.push_back (oq_data (::begin_occ_query (), res));
}

void view::end_occ_query ()
{
  ::end_occ_query ();
}

struct occ_query_material : material
{
  void vsh (view &ctx);
  void fsh (view &ctx);
};

static struct occ_query_material occ_query_material;

void occ_query_material::vsh (view &ctx)
{
  std_vsh ();
}

void occ_query_material::fsh (view &ctx)
{
  // nop
}

bool view::may_draw (const entity *e)
{
  if (drawn.find (e) != drawn.end ())
    return false;

  drawn.insert (e);
  return true;
}

visibility_base *visible::get_visibility (view &ctx)
{
  view::visibility_map::iterator i = ctx.vismap.find (this);
  visibility_base *vs;

  if (i == ctx.vismap.end ())
    {
      vs = new_visibility ();
      ctx.vismap.insert (view::visibility_map::value_type (this, vs));
    }
  else
    {
      vs = i->second;

      if (vs->generation != ctx.generation)
        {
          if (ctx.generation - vs->generation > 2)
            clear_visibility (vs);

          vs->generation = ctx.generation;
        }
    }

  return vs;
}

void view::reset_projection ()
{
  renormalize (orig, p);

  glViewport (0, 0, w, h);

  GLdouble aspect = (GLdouble)w/h;
  GLdouble ftan = tanf (fov * GLfloat (.5 * M_PI / 180.));
  GLdouble ymax = ftan;
  GLdouble xmax = ymax * aspect;

  matrix perspective;
  {
    matrix &m = perspective;

    m(0,0) = 1.F / xmax; m(0,1) =          0; m(0,2) =               0; m(0,3) = 0;
    m(1,0) =          0; m(1,1) = 1.F / ymax; m(1,2) =               0; m(1,3) = 0;
    m(2,0) =          0; m(2,1) =          0; m(2,2) =  -1e30F / z_far; m(2,3) = 0;
    m(3,0) =          0; m(3,1) =          0; m(3,2) =            -1.F; m(3,3) = 0;

    glLoadMatrixf (perspective);
  }
  //glFrustum (-xmax, xmax, -ymax, ymax, z_near, z_far);

  //glGetFloatv (GL_PROJECTION_MATRIX, perspective);

  perspfact = z_near / ymax * 0.5F * h;

  matrix view;
  {
    matrix &m = view;

    d = normalize (d);//D
    u = normalize (u);//D

    vec3 rz = -d;
    vec3 rx = cross (u, rz);
    vec3 ry = cross (rz, rx);

    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.F;

    //diagfact = abs (rz.x) + abs (rz.y) + abs (rz.z);
    diagfact = sqrtf (3.F);
  }

  //printf ("diagfact = %f\n", diagfact);
  //diagfact = sqrtf (3.);//D WHY???
  //
  view = view * matrix::translation (-p);

  matrix projection = perspective * view;

  {
    matrix &m = projection;

    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) );
  }

#if 0
  {
    GLdouble frustlen = z_far - z_near;
    GLdouble fheight  = frustlen * ftan;
    GLdouble fwidth   = fheight * w / h;
    point half (0, 0, z_near + frustlen * .5);
    point corner (fwidth, fheight, frustlen);
    
    frustum.s = sphere (p + d * (.5 * frustlen), length (corner - half));
  }
#endif

  GLdouble depth = h / ftan;
  frustum.c = cone (p, d, atan (sqrt (GLdouble (w * w + h * h)) * ftan));

  glMatrixMode (GL_PROJECTION);
  glLoadMatrixf (projection);

  glMatrixMode (GL_MODELVIEW);
  glLoadIdentity ();
}

void view::begin ()
{
  generation++;

  stat1 = stat2 = 0; //D

  vislist.clear ();
  postdepthlist.clear ();

  z_near = max (nz_near, 1.F);
  z_far = max (nz_far, 1E10F);//D
  c_far = nc_far;

  reset_projection ();

  nz_near = 100.;
  nc_far = nz_far = 1.F;

  first_lighted = false;
}

void view::end ()
{
  printf ("\rfps %f NF %f:%f vis %d,%d (%d,%d) CAM (%ld,%ld,%ld) ",
          timer.fps, z_near, z_far, vislist.size (), drawn.size (), stat1, stat2, orig.x, orig.y, orig.z);//D

  vislist.clear ();
}

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

void view::render (pass_data &pass)
{
  this->pass = &pass;

  switch (pass.type)
    {
      case DEPTH:
        glEnable (GL_CULL_FACE);
        glDisable (GL_MINMAX);
        glDepthRange (DEPTH_OFFSET, 1.);
        glDepthFunc (GL_LESS);
        glColorMask (1, 1, 1, 1);
        glDisable (GL_BLEND);
        glDepthMask (1);

        glClear (GL_DEPTH_BUFFER_BIT | (world_skybox ? 0 : GL_COLOR_BUFFER_BIT));

        //glEnable (GL_STENCIL_TEST); // for depth-passes
        //glStencilOp (GL_KEEP, GL_KEEP, GL_REPLACE);
        //glStencilFunc (GL_LESS, 1, 255);

        //glEnable (GL_POLYGON_OFFSET_FILL);
        //glPolygonOffset (0, 5);
        glEnable (GL_DEPTH_TEST);
        glColorMask (0, 0, 0, 0);

        // check occlusion queries
        printf ("OC1 %d\n", occ_queries.size ());//D
        for (vector<oq_data>::iterator i = occ_queries.begin (); i != occ_queries.end (); ++i)
          *(i->res) = ::occ_query_result (i->id);

        occ_queries.clear ();

        world.detect_visibility (*this);

        for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i)
          (*i)->draw_depth (*this);

        break;

      case POSTDEPTH:
        glDepthRange (0., 1. - DEPTH_OFFSET);
        glDepthFunc (GL_LESS);
        glColorMask (0, 0, 0, 0);
        glDepthMask (0);
        glDisable (GL_STENCIL_TEST);
        glDisable (GL_CULL_FACE);

        glEnable (GL_DEPTH_CLAMP_NV);
       
        occ_query_material.enable (*this);
          for (vector<octant *>::iterator i = postdepthlist.begin (); i != postdepthlist.end (); ++i)
            (*i)->draw_postdepth (*this);
        occ_query_material.disable (*this);

        glDisable (GL_DEPTH_CLAMP_NV);

        first_lighted = true;

        break;

      case LIGHTED:
        if (first_lighted)
          glDisable (GL_BLEND);
        else
          {
            glBlendFunc (GL_ONE, GL_ONE);
            glEnable (GL_BLEND);
          }

        //glClear (GL_STENCIL_BUFFER_BIT);
        //glEnable (GL_STENCIL_TEST);
        glEnable (GL_CULL_FACE);
        glEnable (GL_MINMAX);
        glDepthRange (0., 1. - DEPTH_OFFSET);
        glDepthFunc (GL_LESS);
        glColorMask (1, 1, 1, 1);
        glDepthMask (0);

        if (world_skybox)
          {
            glDisable (GL_DEPTH_TEST);
            world_skybox->draw (*this);//
            glEnable (GL_DEPTH_TEST);
          }

        for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i)
          (*i)->draw_lighted (*this);

        first_lighted = false;

        break;
    }
  
  drawn.clear ();
}

void light::enable (view &ctx)
{
  lightpos->set (p + (orig - ctx.orig));
}

void light::disable (view &ctx)
{
}

void linear_light::enable (view &ctx)
{
  light::enable (ctx);
}

void linear_light::disable (view &ctx)
{
  light::disable (ctx);
}

void linear_light::vsh ()
{
  using namespace shader::compile;
  temp_1f camdist;

  lightvec = lightpos - xyz (model_view_matrix * vin.vertex);
  camdist = max (1 - length (lightvec) / radius, 0);

  fsh ();
}

void linear_light::fsh ()
{
  using namespace shader::compile;

  sh_lightvec = lightvec;
  sh_colour = shader::compile::vec3 (c.r / 255.F, c.g / 255.F, c.b / 255.F) * (min (camdist * (intensity * 100.F) + 0.9F, 1.F));
}


Revision:	1.94
Committed:	Wed Jan 25 22:52:26 2006 UTC (18 years, 3 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.93:	+1 -1 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	#include "material.h"
8
9	#include "entity.h"
10
11	using namespace gl;
12
13	skybox *world_skybox;
14
15	pass_data pass_depth (0, DEPTH);
16	pass_data pass_postdepth (0, POSTDEPTH);
17
18	vector<GLuint> occ_query_objects;
19
20	static GLuint begin_occ_query ()
21	{
22	GLuint id;
23
24	if (occ_query_objects.size ())
25	{
26	id = *(occ_query_objects.end () - 1);
27	occ_query_objects.pop_back ();
28	}
29	else
30	glGenQueries (1, &id);
31
32	glBeginQuery (GL_SAMPLES_PASSED, id);
33	return id;
34	}
35
36	inline void end_occ_query ()
37	{
38	glEndQuery (GL_SAMPLES_PASSED);
39	}
40
41	static GLuint occ_query_result (GLuint id)
42	{
43	GLuint count;
44
45	glGetQueryObjectuiv (id, GL_QUERY_RESULT, &count);
46	occ_query_objects.push_back (id);
47
48	return count;
49	}
50
51	view::view ()
52	: gamma(1.0), nz_near (1.F), nz_far (2.F)
53	{
54	}
55
56	view::~view ()
57	{
58	}
59
60	void view::begin_occ_query (int &res)
61	{
62	occ_queries.push_back (oq_data (::begin_occ_query (), res));
63	}
64
65	void view::end_occ_query ()
66	{
67	::end_occ_query ();
68	}
69
70	struct occ_query_material : material
71	{
72	void vsh (view &ctx);
73	void fsh (view &ctx);
74	};
75
76	static struct occ_query_material occ_query_material;
77
78	void occ_query_material::vsh (view &ctx)
79	{
80	std_vsh ();
81	}
82
83	void occ_query_material::fsh (view &ctx)
84	{
85	// nop
86	}
87
88	bool view::may_draw (const entity *e)
89	{
90	if (drawn.find (e) != drawn.end ())
91	return false;
92
93	drawn.insert (e);
94	return true;
95	}
96
97	visibility_base *visible::get_visibility (view &ctx)
98	{
99	view::visibility_map::iterator i = ctx.vismap.find (this);
100	visibility_base *vs;
101
102	if (i == ctx.vismap.end ())
103	{
104	vs = new_visibility ();
105	ctx.vismap.insert (view::visibility_map::value_type (this, vs));
106	}
107	else
108	{
109	vs = i->second;
110
111	if (vs->generation != ctx.generation)
112	{
113	if (ctx.generation - vs->generation > 2)
114	clear_visibility (vs);
115
116	vs->generation = ctx.generation;
117	}
118	}
119
120	return vs;
121	}
122
123	void view::reset_projection ()
124	{
125	renormalize (orig, p);
126
127	glViewport (0, 0, w, h);
128
129	GLdouble aspect = (GLdouble)w/h;
130	GLdouble ftan = tanf (fov * GLfloat (.5 * M_PI / 180.));
131	GLdouble ymax = ftan;
132	GLdouble xmax = ymax * aspect;
133
134	matrix perspective;
135	{
136	matrix &m = perspective;
137
138	m(0,0) = 1.F / xmax; m(0,1) = 0; m(0,2) = 0; m(0,3) = 0;
139	m(1,0) = 0; m(1,1) = 1.F / ymax; m(1,2) = 0; m(1,3) = 0;
140	m(2,0) = 0; m(2,1) = 0; m(2,2) = -1e30F / z_far; m(2,3) = 0;
141	m(3,0) = 0; m(3,1) = 0; m(3,2) = -1.F; m(3,3) = 0;
142
143	glLoadMatrixf (perspective);
144	}
145	//glFrustum (-xmax, xmax, -ymax, ymax, z_near, z_far);
146
147	//glGetFloatv (GL_PROJECTION_MATRIX, perspective);
148
149	perspfact = z_near / ymax * 0.5F * h;
150
151	matrix view;
152	{
153	matrix &m = view;
154
155	d = normalize (d);//D
156	u = normalize (u);//D
157
158	vec3 rz = -d;
159	vec3 rx = cross (u, rz);
160	vec3 ry = cross (rz, rx);
161
162	m(0,0) = rx.x; m(0,1) = rx.y; m(0,2) = rx.z; m(0,3) = 0;
163	m(1,0) = ry.x; m(1,1) = ry.y; m(1,2) = ry.z; m(1,3) = 0;
164	m(2,0) = rz.x; m(2,1) = rz.y; m(2,2) = rz.z; m(2,3) = 0;
165	m(3,0) = 0; m(3,1) = 0; m(3,2) = 0; m(3,3) = 1.F;
166
167	//diagfact = abs (rz.x) + abs (rz.y) + abs (rz.z);
168	diagfact = sqrtf (3.F);
169	}
170
171	//printf ("diagfact = %f\n", diagfact);
172	//diagfact = sqrtf (3.);//D WHY???
173	//
174	view = view * matrix::translation (-p);
175
176	matrix projection = perspective * view;
177
178	{
179	matrix &m = projection;
180
181	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) );
182	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) );
183	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) );
184	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) );
185	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) );
186	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) );
187	}
188
189	#if 0
190	{
191	GLdouble frustlen = z_far - z_near;
192	GLdouble fheight = frustlen * ftan;
193	GLdouble fwidth = fheight * w / h;
194	point half (0, 0, z_near + frustlen * .5);
195	point corner (fwidth, fheight, frustlen);
196
197	frustum.s = sphere (p + d * (.5 * frustlen), length (corner - half));
198	}
199	#endif
200
201	GLdouble depth = h / ftan;
202	frustum.c = cone (p, d, atan (sqrt (GLdouble (w * w + h * h)) * ftan));
203
204	glMatrixMode (GL_PROJECTION);
205	glLoadMatrixf (projection);
206
207	glMatrixMode (GL_MODELVIEW);
208	glLoadIdentity ();
209	}
210
211	void view::begin ()
212	{
213	generation++;
214
215	stat1 = stat2 = 0; //D
216
217	vislist.clear ();
218	postdepthlist.clear ();
219
220	z_near = max (nz_near, 1.F);
221	z_far = max (nz_far, 1E10F);//D
222	c_far = nc_far;
223
224	reset_projection ();
225
226	nz_near = 100.;
227	nc_far = nz_far = 1.F;
228
229	first_lighted = false;
230	}
231
232	void view::end ()
233	{
234	printf ("\rfps %f NF %f:%f vis %d,%d (%d,%d) CAM (%ld,%ld,%ld) ",
235	timer.fps, z_near, z_far, vislist.size (), drawn.size (), stat1, stat2, orig.x, orig.y, orig.z);//D
236
237	vislist.clear ();
238	}
239
240	#define DEPTH_OFFSET (1. / (GLdouble)(1L << 16))
241
242	void view::render (pass_data &pass)
243	{
244	this->pass = &pass;
245
246	switch (pass.type)
247	{
248	case DEPTH:
249	glEnable (GL_CULL_FACE);
250	glDisable (GL_MINMAX);
251	glDepthRange (DEPTH_OFFSET, 1.);
252	glDepthFunc (GL_LESS);
253	glColorMask (1, 1, 1, 1);
254	glDisable (GL_BLEND);
255	glDepthMask (1);
256
257	glClear (GL_DEPTH_BUFFER_BIT \| (world_skybox ? 0 : GL_COLOR_BUFFER_BIT));
258
259	//glEnable (GL_STENCIL_TEST); // for depth-passes
260	//glStencilOp (GL_KEEP, GL_KEEP, GL_REPLACE);
261	//glStencilFunc (GL_LESS, 1, 255);
262
263	//glEnable (GL_POLYGON_OFFSET_FILL);
264	//glPolygonOffset (0, 5);
265	glEnable (GL_DEPTH_TEST);
266	glColorMask (0, 0, 0, 0);
267
268	// check occlusion queries
269	printf ("OC1 %d\n", occ_queries.size ());//D
270	for (vector<oq_data>::iterator i = occ_queries.begin (); i != occ_queries.end (); ++i)
271	*(i->res) = ::occ_query_result (i->id);
272
273	occ_queries.clear ();
274
275	world.detect_visibility (*this);
276
277	for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i)
278	(i)->draw_depth (this);
279
280	break;
281
282	case POSTDEPTH:
283	glDepthRange (0., 1. - DEPTH_OFFSET);
284	glDepthFunc (GL_LESS);
285	glColorMask (0, 0, 0, 0);
286	glDepthMask (0);
287	glDisable (GL_STENCIL_TEST);
288	glDisable (GL_CULL_FACE);
289
290	glEnable (GL_DEPTH_CLAMP_NV);
291
292	occ_query_material.enable (*this);
293	for (vector<octant *>::iterator i = postdepthlist.begin (); i != postdepthlist.end (); ++i)
294	(i)->draw_postdepth (this);
295	occ_query_material.disable (*this);
296
297	glDisable (GL_DEPTH_CLAMP_NV);
298
299	first_lighted = true;
300
301	break;
302
303	case LIGHTED:
304	if (first_lighted)
305	glDisable (GL_BLEND);
306	else
307	{
308	glBlendFunc (GL_ONE, GL_ONE);
309	glEnable (GL_BLEND);
310	}
311
312	//glClear (GL_STENCIL_BUFFER_BIT);
313	//glEnable (GL_STENCIL_TEST);
314	glEnable (GL_CULL_FACE);
315	glEnable (GL_MINMAX);
316	glDepthRange (0., 1. - DEPTH_OFFSET);
317	glDepthFunc (GL_LESS);
318	glColorMask (1, 1, 1, 1);
319	glDepthMask (0);
320
321	if (world_skybox)
322	{
323	glDisable (GL_DEPTH_TEST);
324	world_skybox->draw (*this);//
325	glEnable (GL_DEPTH_TEST);
326	}
327
328	for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i)
329	(i)->draw_lighted (this);
330
331	first_lighted = false;
332
333	break;
334	}
335
336	drawn.clear ();
337	}
338
339	void light::enable (view &ctx)
340	{
341	lightpos->set (p + (orig - ctx.orig));
342	}
343
344	void light::disable (view &ctx)
345	{
346	}
347
348	void linear_light::enable (view &ctx)
349	{
350	light::enable (ctx);
351	}
352
353	void linear_light::disable (view &ctx)
354	{
355	light::disable (ctx);
356	}
357
358	void linear_light::vsh ()
359	{
360	using namespace shader::compile;
361	temp_1f camdist;
362
363	lightvec = lightpos - xyz (model_view_matrix * vin.vertex);
364	camdist = max (1 - length (lightvec) / radius, 0);
365
366	fsh ();
367	}
368
369	void linear_light::fsh ()
370	{
371	using namespace shader::compile;
372
373	sh_lightvec = lightvec;
374	sh_colour = shader::compile::vec3 (c.r / 255.F, c.g / 255.F, c.b / 255.F) * (min (camdist * (intensity * 100.F) + 0.9F, 1.F));
375	}
376
377