--- libgender/view.C	2004/10/06 01:41:30	1.18
+++ libgender/view.C	2004/10/10 00:19:45	1.43
@@ -1,7 +1,44 @@
 #include <cmath>
 
-#include "oct.h"
+#define GL_GLEXT_PROTOTYPES
+#include <GL/gl.h>
+#include <GL/glext.h>
+
 #include "view.h"
+#include "oct.h"
+
+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
+    glGenQueriesARB (1, &id);
+
+  glBeginQueryARB (GL_SAMPLES_PASSED, id);
+  return id;
+}
+
+inline void end_occ_query ()
+{
+  glEndQueryARB (GL_SAMPLES_PASSED);
+}
+
+static GLuint occ_query_result (GLuint id)
+{
+  GLuint count;
+
+  glGetQueryObjectuivARB (id, GL_QUERY_RESULT, &count);
+  occ_query_objects.push_back (id);
+
+  return count;
+}
 
 view::view ()
 : gamma(1.0)
@@ -12,7 +49,17 @@
 {
 }
 
-bool view::may_draw (entity_base *e)
+void view::begin_occ_query (recv_occ_query &recv)
+{
+  occ_queries.push_back (oq_data (&recv, ::begin_occ_query ()));
+}
+
+void view::end_occ_query ()
+{
+  ::end_occ_query ();
+}
+
+bool view::may_draw (const entity *e)
 {
   if (drawn.find (e) != drawn.end ())
     return false;
@@ -31,14 +78,13 @@
   glLoadIdentity ();
 
   GLdouble aspect = (GLdouble)w/h;
-  GLdouble zNear = 0.1;
-  GLdouble zFar = 50.;
+  GLdouble ymax = z_near * tan (fov * (M_PI / 360.0));
 
-  GLdouble ymax = zNear * tan (fov * (M_PI / 360.0));
-  glFrustum (-ymax * aspect, ymax * aspect, -ymax, ymax, zNear, zFar);
+  glFrustum (-ymax * aspect, ymax * aspect, -ymax, ymax, z_near, z_far);
 
   d = normalize (d);//D
   u = normalize (u);//D
+
   vec3 rz = -d;
   vec3 rx = cross (u, rz);
   vec3 ry = cross (rz, rx);
@@ -49,9 +95,14 @@
   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);
+  diagfact = abs (rz.x) + abs (rz.y) + abs (rz.z);
+  diagfact = sqrtf (3.);//D WHY???
+  //printf ("diagfact = %f\n", diagfact);
 
-  glGetFloatv (GL_PROJECTION_MATRIX, (GLfloat *)&m);
+  glMultMatrixf (m);
+  glTranslatef (-p.x, -p.y, -p.z);
+
+  glGetFloatv (GL_PROJECTION_MATRIX, 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) );
@@ -62,26 +113,46 @@
 
   glMatrixMode (GL_MODELVIEW);
   glLoadIdentity ();
-  glTranslatef (-p.x, -p.y, -p.z);
 }
 
 void view::begin ()
 {
-  vismap.clear ();
+  glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+  glDepthRange (0, 1. - (1. / pow (2., 16.)));
+
+  vislist.clear ();
 
   generation++;
 
-  reset_projection ();
+  farlist.clear ();
+
+  // check occlusion queries
+  for (vector<oq_data>::iterator i = occ_queries.begin (); i != occ_queries.end (); ++i)
+    {
+      occ_query oq(*this, i->second, occ_query_result (i->second));
+      i->first->event (oq);
+    }
 
-  // check occlusion queries here
-  checklist.clear ();
+  occ_queries.clear ();
 
+  z_far = nz_far;
+  c_far = nc_far;
+  reset_projection ();
+
+  nc_far = nz_far = z_near + 1.F;
   world.detect_visibility (*this);
+
+  printf ("far %f cf %f RCP %f,%f,%f +%f\n", z_far, c_far,
+      frustum.r.n.x,
+      frustum.r.n.y,
+      frustum.r.n.z,
+      frustum.r.d
+      );//D
 }
 
 void view::end ()
 {
-  vismap.clear ();
+  vislist.clear ();
 }
 
 void view::pass (enum mode m)
@@ -98,26 +169,70 @@
       glDepthFunc (GL_LESS);
       glDisable (GL_LIGHTING);
       glColorMask (0, 0, 0, 0);
-      //cgGLDisableProfile (CG_PROFILE_ARBVP1);
-      cgGLDisableProfile (CG_PROFILE_ARBFP1);
+      cgGLDisableProfile (vsh_profile);// z-fighting??
+      cgGLDisableProfile (fsh_profile);
     }
   else
     {
       glEnable (GL_MINMAX);
       glDisable (GL_POLYGON_OFFSET_FILL);
       glDepthFunc (GL_LESS);
-      glDepthMask (0);
-      cgGLEnableProfile (CG_PROFILE_ARBVP1);
-      cgGLEnableProfile (CG_PROFILE_ARBFP1);
+      glDepthMask (1);
+      cgGLEnableProfile (vsh_profile);
+      cgGLEnableProfile (fsh_profile);
     }
   
   for (vector<octant *>::iterator i = vislist.begin (); i != vislist.end (); ++i)
-    (*i)->display (*this);
+    {
+      visibility_state &vs = vismap[*i];
+      bool oq = (vs.visibility == visibility_state::PARTIAL
+                 || vs.visibility == visibility_state::FULL)
+                && (vs.last + 1. < timer.now)
+                && (mode == LIGHTED);
+
+      if (oq)
+        begin_occ_query (**i);
+
+      (*i)->display (*this);
+
+      if (oq)
+        end_occ_query ();
+
+    }
 
   drawn.clear ();
 
+  if (mode == view::DEPTH)
+    {
+      glEnable (GL_DEPTH_CLAMP_NV);
+      glDepthMask (0);
+      glDepthFunc (GL_LESS);
+      if (mode == view::LIGHTED) glDepthFunc (GL_LEQUAL);
+      glDisable (GL_LIGHTING);
+      cgGLDisableProfile (vsh_profile);
+      cgGLDisableProfile (fsh_profile);
+
+#if 0
+      static int count; count++;
+      if (farlist.size ())
+        printf ("%d: size %d\n", count, farlist.size ());
+#endif
+
+      for (vector<octant *>::iterator i = farlist.begin (); i != farlist.end (); ++i)
+        {
+          if (mode == view::DEPTH) begin_occ_query (**i);
+          if (mode == view::LIGHTED) glColor3f ((((long)*i >> 6) & 15) / 31. + 0.5,0,0);
+          (*i)->draw_bbox (*this);
+          if (mode == view::DEPTH) end_occ_query ();
+       }
+
+      glDisable (GL_DEPTH_CLAMP_NV);
+      glDepthMask (1);
+    }
+
   glColorMask (1, 1, 1, 0);
   glDepthMask (1);
+
 }